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3201 lines
86 KiB
3201 lines
86 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Digital Audio (PCM) abstract layer / OSS compatible |
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* Copyright (c) by Jaroslav Kysela <[email protected]> |
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*/ |
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|
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#if 0 |
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#define PLUGIN_DEBUG |
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#endif |
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#if 0 |
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#define OSS_DEBUG |
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#endif |
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|
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/sched/signal.h> |
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#include <linux/time.h> |
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#include <linux/vmalloc.h> |
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#include <linux/module.h> |
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#include <linux/math64.h> |
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#include <linux/string.h> |
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#include <linux/compat.h> |
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#include <sound/core.h> |
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#include <sound/minors.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include "pcm_plugin.h" |
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#include <sound/info.h> |
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#include <linux/soundcard.h> |
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#include <sound/initval.h> |
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#include <sound/mixer_oss.h> |
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|
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#define OSS_ALSAEMULVER _SIOR ('M', 249, int) |
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|
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static int dsp_map[SNDRV_CARDS]; |
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static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
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static bool nonblock_open = 1; |
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|
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MODULE_AUTHOR("Jaroslav Kysela <[email protected]>, Abramo Bagnara <[email protected]>"); |
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MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); |
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MODULE_LICENSE("GPL"); |
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module_param_array(dsp_map, int, NULL, 0444); |
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MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); |
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module_param_array(adsp_map, int, NULL, 0444); |
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MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); |
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module_param(nonblock_open, bool, 0644); |
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MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); |
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); |
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); |
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|
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static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); |
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static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); |
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static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); |
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|
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/* |
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* helper functions to process hw_params |
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*/ |
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static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) |
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{ |
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int changed = 0; |
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if (i->min < min) { |
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i->min = min; |
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i->openmin = openmin; |
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changed = 1; |
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} else if (i->min == min && !i->openmin && openmin) { |
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i->openmin = 1; |
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changed = 1; |
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} |
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if (i->integer) { |
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if (i->openmin) { |
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i->min++; |
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i->openmin = 0; |
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} |
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} |
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if (snd_interval_checkempty(i)) { |
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snd_interval_none(i); |
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return -EINVAL; |
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} |
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return changed; |
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} |
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|
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static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) |
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{ |
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int changed = 0; |
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if (i->max > max) { |
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i->max = max; |
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i->openmax = openmax; |
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changed = 1; |
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} else if (i->max == max && !i->openmax && openmax) { |
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i->openmax = 1; |
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changed = 1; |
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} |
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if (i->integer) { |
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if (i->openmax) { |
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i->max--; |
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i->openmax = 0; |
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} |
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} |
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if (snd_interval_checkempty(i)) { |
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snd_interval_none(i); |
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return -EINVAL; |
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} |
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return changed; |
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} |
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|
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static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) |
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{ |
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struct snd_interval t; |
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t.empty = 0; |
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t.min = t.max = val; |
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t.openmin = t.openmax = 0; |
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t.integer = 1; |
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return snd_interval_refine(i, &t); |
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} |
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|
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/** |
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* snd_pcm_hw_param_value_min |
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* @params: the hw_params instance |
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* @var: parameter to retrieve |
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* @dir: pointer to the direction (-1,0,1) or NULL |
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* |
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* Return the minimum value for field PAR. |
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*/ |
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static unsigned int |
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snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, int *dir) |
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{ |
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if (hw_is_mask(var)) { |
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if (dir) |
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*dir = 0; |
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return snd_mask_min(hw_param_mask_c(params, var)); |
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} |
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if (hw_is_interval(var)) { |
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const struct snd_interval *i = hw_param_interval_c(params, var); |
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if (dir) |
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*dir = i->openmin; |
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return snd_interval_min(i); |
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} |
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return -EINVAL; |
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} |
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|
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/** |
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* snd_pcm_hw_param_value_max |
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* @params: the hw_params instance |
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* @var: parameter to retrieve |
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* @dir: pointer to the direction (-1,0,1) or NULL |
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* |
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* Return the maximum value for field PAR. |
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*/ |
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static unsigned int |
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snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, int *dir) |
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{ |
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if (hw_is_mask(var)) { |
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if (dir) |
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*dir = 0; |
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return snd_mask_max(hw_param_mask_c(params, var)); |
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} |
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if (hw_is_interval(var)) { |
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const struct snd_interval *i = hw_param_interval_c(params, var); |
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if (dir) |
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*dir = - (int) i->openmax; |
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return snd_interval_max(i); |
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} |
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return -EINVAL; |
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} |
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|
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static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, |
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const struct snd_mask *val) |
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{ |
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int changed; |
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changed = snd_mask_refine(hw_param_mask(params, var), val); |
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if (changed > 0) { |
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params->cmask |= 1 << var; |
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params->rmask |= 1 << var; |
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} |
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return changed; |
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} |
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|
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static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, |
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const struct snd_mask *val) |
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{ |
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int changed = _snd_pcm_hw_param_mask(params, var, val); |
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if (changed < 0) |
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return changed; |
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if (params->rmask) { |
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int err = snd_pcm_hw_refine(pcm, params); |
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if (err < 0) |
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return err; |
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} |
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return 0; |
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} |
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|
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static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int val, |
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int dir) |
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{ |
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int changed; |
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int open = 0; |
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if (dir) { |
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if (dir > 0) { |
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open = 1; |
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} else if (dir < 0) { |
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if (val > 0) { |
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open = 1; |
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val--; |
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} |
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} |
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} |
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if (hw_is_mask(var)) |
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changed = snd_mask_refine_min(hw_param_mask(params, var), |
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val + !!open); |
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else if (hw_is_interval(var)) |
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changed = snd_interval_refine_min(hw_param_interval(params, var), |
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val, open); |
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else |
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return -EINVAL; |
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if (changed > 0) { |
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params->cmask |= 1 << var; |
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params->rmask |= 1 << var; |
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} |
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return changed; |
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} |
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|
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/** |
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* snd_pcm_hw_param_min |
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* @pcm: PCM instance |
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* @params: the hw_params instance |
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* @var: parameter to retrieve |
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* @val: minimal value |
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* @dir: pointer to the direction (-1,0,1) or NULL |
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* |
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* Inside configuration space defined by PARAMS remove from PAR all |
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* values < VAL. Reduce configuration space accordingly. |
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* Return new minimum or -EINVAL if the configuration space is empty |
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*/ |
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static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int val, |
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int *dir) |
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{ |
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int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); |
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if (changed < 0) |
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return changed; |
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if (params->rmask) { |
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int err = snd_pcm_hw_refine(pcm, params); |
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if (err < 0) |
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return err; |
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} |
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return snd_pcm_hw_param_value_min(params, var, dir); |
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} |
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|
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static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int val, |
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int dir) |
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{ |
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int changed; |
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int open = 0; |
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if (dir) { |
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if (dir < 0) { |
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open = 1; |
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} else if (dir > 0) { |
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open = 1; |
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val++; |
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} |
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} |
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if (hw_is_mask(var)) { |
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if (val == 0 && open) { |
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snd_mask_none(hw_param_mask(params, var)); |
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changed = -EINVAL; |
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} else |
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changed = snd_mask_refine_max(hw_param_mask(params, var), |
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val - !!open); |
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} else if (hw_is_interval(var)) |
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changed = snd_interval_refine_max(hw_param_interval(params, var), |
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val, open); |
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else |
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return -EINVAL; |
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if (changed > 0) { |
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params->cmask |= 1 << var; |
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params->rmask |= 1 << var; |
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} |
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return changed; |
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} |
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|
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/** |
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* snd_pcm_hw_param_max |
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* @pcm: PCM instance |
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* @params: the hw_params instance |
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* @var: parameter to retrieve |
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* @val: maximal value |
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* @dir: pointer to the direction (-1,0,1) or NULL |
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* |
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* Inside configuration space defined by PARAMS remove from PAR all |
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* values >= VAL + 1. Reduce configuration space accordingly. |
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* Return new maximum or -EINVAL if the configuration space is empty |
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*/ |
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static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int val, |
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int *dir) |
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{ |
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int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); |
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if (changed < 0) |
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return changed; |
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if (params->rmask) { |
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int err = snd_pcm_hw_refine(pcm, params); |
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if (err < 0) |
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return err; |
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} |
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return snd_pcm_hw_param_value_max(params, var, dir); |
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} |
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|
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static int boundary_sub(int a, int adir, |
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int b, int bdir, |
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int *c, int *cdir) |
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{ |
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adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); |
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bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); |
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*c = a - b; |
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*cdir = adir - bdir; |
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if (*cdir == -2) { |
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(*c)--; |
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} else if (*cdir == 2) { |
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(*c)++; |
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} |
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return 0; |
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} |
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|
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static int boundary_lt(unsigned int a, int adir, |
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unsigned int b, int bdir) |
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{ |
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if (adir < 0) { |
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a--; |
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adir = 1; |
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} else if (adir > 0) |
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adir = 1; |
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if (bdir < 0) { |
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b--; |
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bdir = 1; |
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} else if (bdir > 0) |
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bdir = 1; |
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return a < b || (a == b && adir < bdir); |
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} |
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|
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/* Return 1 if min is nearer to best than max */ |
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static int boundary_nearer(int min, int mindir, |
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int best, int bestdir, |
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int max, int maxdir) |
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{ |
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int dmin, dmindir; |
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int dmax, dmaxdir; |
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boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); |
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boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); |
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return boundary_lt(dmin, dmindir, dmax, dmaxdir); |
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} |
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|
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/** |
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* snd_pcm_hw_param_near |
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* @pcm: PCM instance |
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* @params: the hw_params instance |
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* @var: parameter to retrieve |
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* @best: value to set |
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* @dir: pointer to the direction (-1,0,1) or NULL |
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* |
|
* Inside configuration space defined by PARAMS set PAR to the available value |
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* nearest to VAL. Reduce configuration space accordingly. |
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* This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, |
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* SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. |
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* Return the value found. |
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*/ |
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static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, |
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struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int best, |
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int *dir) |
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{ |
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struct snd_pcm_hw_params *save = NULL; |
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int v; |
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unsigned int saved_min; |
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int last = 0; |
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int min, max; |
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int mindir, maxdir; |
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int valdir = dir ? *dir : 0; |
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/* FIXME */ |
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if (best > INT_MAX) |
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best = INT_MAX; |
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min = max = best; |
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mindir = maxdir = valdir; |
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if (maxdir > 0) |
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maxdir = 0; |
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else if (maxdir == 0) |
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maxdir = -1; |
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else { |
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maxdir = 1; |
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max--; |
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} |
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save = kmalloc(sizeof(*save), GFP_KERNEL); |
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if (save == NULL) |
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return -ENOMEM; |
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*save = *params; |
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saved_min = min; |
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min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); |
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if (min >= 0) { |
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struct snd_pcm_hw_params *params1; |
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if (max < 0) |
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goto _end; |
|
if ((unsigned int)min == saved_min && mindir == valdir) |
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goto _end; |
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params1 = kmalloc(sizeof(*params1), GFP_KERNEL); |
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if (params1 == NULL) { |
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kfree(save); |
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return -ENOMEM; |
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} |
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*params1 = *save; |
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max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); |
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if (max < 0) { |
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kfree(params1); |
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goto _end; |
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} |
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if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { |
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*params = *params1; |
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last = 1; |
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} |
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kfree(params1); |
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} else { |
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*params = *save; |
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max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); |
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if (max < 0) { |
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kfree(save); |
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return max; |
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} |
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last = 1; |
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} |
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_end: |
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kfree(save); |
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if (last) |
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v = snd_pcm_hw_param_last(pcm, params, var, dir); |
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else |
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v = snd_pcm_hw_param_first(pcm, params, var, dir); |
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return v; |
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} |
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|
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static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, |
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snd_pcm_hw_param_t var, unsigned int val, |
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int dir) |
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{ |
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int changed; |
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if (hw_is_mask(var)) { |
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struct snd_mask *m = hw_param_mask(params, var); |
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if (val == 0 && dir < 0) { |
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changed = -EINVAL; |
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snd_mask_none(m); |
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} else { |
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if (dir > 0) |
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val++; |
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else if (dir < 0) |
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val--; |
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changed = snd_mask_refine_set(hw_param_mask(params, var), val); |
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} |
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} else if (hw_is_interval(var)) { |
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struct snd_interval *i = hw_param_interval(params, var); |
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if (val == 0 && dir < 0) { |
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changed = -EINVAL; |
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snd_interval_none(i); |
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} else if (dir == 0) |
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changed = snd_interval_refine_set(i, val); |
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else { |
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struct snd_interval t; |
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t.openmin = 1; |
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t.openmax = 1; |
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t.empty = 0; |
|
t.integer = 0; |
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if (dir < 0) { |
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t.min = val - 1; |
|
t.max = val; |
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} else { |
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t.min = val; |
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t.max = val+1; |
|
} |
|
changed = snd_interval_refine(i, &t); |
|
} |
|
} else |
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return -EINVAL; |
|
if (changed > 0) { |
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params->cmask |= 1 << var; |
|
params->rmask |= 1 << var; |
|
} |
|
return changed; |
|
} |
|
|
|
/** |
|
* snd_pcm_hw_param_set |
|
* @pcm: PCM instance |
|
* @params: the hw_params instance |
|
* @var: parameter to retrieve |
|
* @val: value to set |
|
* @dir: pointer to the direction (-1,0,1) or NULL |
|
* |
|
* Inside configuration space defined by PARAMS remove from PAR all |
|
* values != VAL. Reduce configuration space accordingly. |
|
* Return VAL or -EINVAL if the configuration space is empty |
|
*/ |
|
static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, |
|
struct snd_pcm_hw_params *params, |
|
snd_pcm_hw_param_t var, unsigned int val, |
|
int dir) |
|
{ |
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int changed = _snd_pcm_hw_param_set(params, var, val, dir); |
|
if (changed < 0) |
|
return changed; |
|
if (params->rmask) { |
|
int err = snd_pcm_hw_refine(pcm, params); |
|
if (err < 0) |
|
return err; |
|
} |
|
return snd_pcm_hw_param_value(params, var, NULL); |
|
} |
|
|
|
static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, |
|
snd_pcm_hw_param_t var) |
|
{ |
|
int changed; |
|
changed = snd_interval_setinteger(hw_param_interval(params, var)); |
|
if (changed > 0) { |
|
params->cmask |= 1 << var; |
|
params->rmask |= 1 << var; |
|
} |
|
return changed; |
|
} |
|
|
|
/* |
|
* plugin |
|
*/ |
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
struct snd_pcm_plugin *plugin, *next; |
|
|
|
plugin = runtime->oss.plugin_first; |
|
while (plugin) { |
|
next = plugin->next; |
|
snd_pcm_plugin_free(plugin); |
|
plugin = next; |
|
} |
|
runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) |
|
{ |
|
struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
|
plugin->next = runtime->oss.plugin_first; |
|
plugin->prev = NULL; |
|
if (runtime->oss.plugin_first) { |
|
runtime->oss.plugin_first->prev = plugin; |
|
runtime->oss.plugin_first = plugin; |
|
} else { |
|
runtime->oss.plugin_last = |
|
runtime->oss.plugin_first = plugin; |
|
} |
|
return 0; |
|
} |
|
|
|
int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) |
|
{ |
|
struct snd_pcm_runtime *runtime = plugin->plug->runtime; |
|
plugin->next = NULL; |
|
plugin->prev = runtime->oss.plugin_last; |
|
if (runtime->oss.plugin_last) { |
|
runtime->oss.plugin_last->next = plugin; |
|
runtime->oss.plugin_last = plugin; |
|
} else { |
|
runtime->oss.plugin_last = |
|
runtime->oss.plugin_first = plugin; |
|
} |
|
return 0; |
|
} |
|
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
|
|
|
static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
|
long bytes = frames_to_bytes(runtime, frames); |
|
if (buffer_size == runtime->oss.buffer_bytes) |
|
return bytes; |
|
#if BITS_PER_LONG >= 64 |
|
return runtime->oss.buffer_bytes * bytes / buffer_size; |
|
#else |
|
{ |
|
u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; |
|
return div_u64(bsize, buffer_size); |
|
} |
|
#endif |
|
} |
|
|
|
static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
long buffer_size = snd_pcm_lib_buffer_bytes(substream); |
|
if (buffer_size == runtime->oss.buffer_bytes) |
|
return bytes_to_frames(runtime, bytes); |
|
return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); |
|
} |
|
|
|
static inline |
|
snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) |
|
{ |
|
return runtime->hw_ptr_interrupt; |
|
} |
|
|
|
/* define extended formats in the recent OSS versions (if any) */ |
|
/* linear formats */ |
|
#define AFMT_S32_LE 0x00001000 |
|
#define AFMT_S32_BE 0x00002000 |
|
#define AFMT_S24_LE 0x00008000 |
|
#define AFMT_S24_BE 0x00010000 |
|
#define AFMT_S24_PACKED 0x00040000 |
|
|
|
/* other supported formats */ |
|
#define AFMT_FLOAT 0x00004000 |
|
#define AFMT_SPDIF_RAW 0x00020000 |
|
|
|
/* unsupported formats */ |
|
#define AFMT_AC3 0x00000400 |
|
#define AFMT_VORBIS 0x00000800 |
|
|
|
static snd_pcm_format_t snd_pcm_oss_format_from(int format) |
|
{ |
|
switch (format) { |
|
case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; |
|
case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; |
|
case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; |
|
case AFMT_U8: return SNDRV_PCM_FORMAT_U8; |
|
case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; |
|
case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; |
|
case AFMT_S8: return SNDRV_PCM_FORMAT_S8; |
|
case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; |
|
case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; |
|
case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; |
|
case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; |
|
case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; |
|
case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; |
|
case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; |
|
case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; |
|
case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; |
|
case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; |
|
default: return SNDRV_PCM_FORMAT_U8; |
|
} |
|
} |
|
|
|
static int snd_pcm_oss_format_to(snd_pcm_format_t format) |
|
{ |
|
switch (format) { |
|
case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; |
|
case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; |
|
case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; |
|
case SNDRV_PCM_FORMAT_U8: return AFMT_U8; |
|
case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; |
|
case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; |
|
case SNDRV_PCM_FORMAT_S8: return AFMT_S8; |
|
case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; |
|
case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; |
|
case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; |
|
case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; |
|
case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; |
|
case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; |
|
case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; |
|
case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; |
|
case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; |
|
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; |
|
default: return -EINVAL; |
|
} |
|
} |
|
|
|
static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *oss_params, |
|
struct snd_pcm_hw_params *slave_params) |
|
{ |
|
size_t s; |
|
size_t oss_buffer_size, oss_period_size, oss_periods; |
|
size_t min_period_size, max_period_size; |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
size_t oss_frame_size; |
|
|
|
oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * |
|
params_channels(oss_params) / 8; |
|
|
|
oss_buffer_size = snd_pcm_plug_client_size(substream, |
|
snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; |
|
if (!oss_buffer_size) |
|
return -EINVAL; |
|
oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); |
|
if (atomic_read(&substream->mmap_count)) { |
|
if (oss_buffer_size > runtime->oss.mmap_bytes) |
|
oss_buffer_size = runtime->oss.mmap_bytes; |
|
} |
|
|
|
if (substream->oss.setup.period_size > 16) |
|
oss_period_size = substream->oss.setup.period_size; |
|
else if (runtime->oss.fragshift) { |
|
oss_period_size = 1 << runtime->oss.fragshift; |
|
if (oss_period_size > oss_buffer_size / 2) |
|
oss_period_size = oss_buffer_size / 2; |
|
} else { |
|
int sd; |
|
size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; |
|
|
|
oss_period_size = oss_buffer_size; |
|
do { |
|
oss_period_size /= 2; |
|
} while (oss_period_size > bytes_per_sec); |
|
if (runtime->oss.subdivision == 0) { |
|
sd = 4; |
|
if (oss_period_size / sd > 4096) |
|
sd *= 2; |
|
if (oss_period_size / sd < 4096) |
|
sd = 1; |
|
} else |
|
sd = runtime->oss.subdivision; |
|
oss_period_size /= sd; |
|
if (oss_period_size < 16) |
|
oss_period_size = 16; |
|
} |
|
|
|
min_period_size = snd_pcm_plug_client_size(substream, |
|
snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
|
if (min_period_size) { |
|
min_period_size *= oss_frame_size; |
|
min_period_size = roundup_pow_of_two(min_period_size); |
|
if (oss_period_size < min_period_size) |
|
oss_period_size = min_period_size; |
|
} |
|
|
|
max_period_size = snd_pcm_plug_client_size(substream, |
|
snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
|
if (max_period_size) { |
|
max_period_size *= oss_frame_size; |
|
max_period_size = rounddown_pow_of_two(max_period_size); |
|
if (oss_period_size > max_period_size) |
|
oss_period_size = max_period_size; |
|
} |
|
|
|
oss_periods = oss_buffer_size / oss_period_size; |
|
|
|
if (substream->oss.setup.periods > 1) |
|
oss_periods = substream->oss.setup.periods; |
|
|
|
s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
|
if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) |
|
s = runtime->oss.maxfrags; |
|
if (oss_periods > s) |
|
oss_periods = s; |
|
|
|
s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
|
if (s < 2) |
|
s = 2; |
|
if (oss_periods < s) |
|
oss_periods = s; |
|
|
|
while (oss_period_size * oss_periods > oss_buffer_size) |
|
oss_period_size /= 2; |
|
|
|
if (oss_period_size < 16) |
|
return -EINVAL; |
|
runtime->oss.period_bytes = oss_period_size; |
|
runtime->oss.period_frames = 1; |
|
runtime->oss.periods = oss_periods; |
|
return 0; |
|
} |
|
|
|
static int choose_rate(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *params, unsigned int best_rate) |
|
{ |
|
const struct snd_interval *it; |
|
struct snd_pcm_hw_params *save; |
|
unsigned int rate, prev; |
|
|
|
save = kmalloc(sizeof(*save), GFP_KERNEL); |
|
if (save == NULL) |
|
return -ENOMEM; |
|
*save = *params; |
|
it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); |
|
|
|
/* try multiples of the best rate */ |
|
rate = best_rate; |
|
for (;;) { |
|
if (it->max < rate || (it->max == rate && it->openmax)) |
|
break; |
|
if (it->min < rate || (it->min == rate && !it->openmin)) { |
|
int ret; |
|
ret = snd_pcm_hw_param_set(substream, params, |
|
SNDRV_PCM_HW_PARAM_RATE, |
|
rate, 0); |
|
if (ret == (int)rate) { |
|
kfree(save); |
|
return rate; |
|
} |
|
*params = *save; |
|
} |
|
prev = rate; |
|
rate += best_rate; |
|
if (rate <= prev) |
|
break; |
|
} |
|
|
|
/* not found, use the nearest rate */ |
|
kfree(save); |
|
return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); |
|
} |
|
|
|
/* parameter locking: returns immediately if tried during streaming */ |
|
static int lock_params(struct snd_pcm_runtime *runtime) |
|
{ |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
|
return -ERESTARTSYS; |
|
if (atomic_read(&runtime->oss.rw_ref)) { |
|
mutex_unlock(&runtime->oss.params_lock); |
|
return -EBUSY; |
|
} |
|
return 0; |
|
} |
|
|
|
static void unlock_params(struct snd_pcm_runtime *runtime) |
|
{ |
|
mutex_unlock(&runtime->oss.params_lock); |
|
} |
|
|
|
/* call with params_lock held */ |
|
static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
struct snd_pcm_hw_params *params, *sparams; |
|
struct snd_pcm_sw_params *sw_params; |
|
ssize_t oss_buffer_size, oss_period_size; |
|
size_t oss_frame_size; |
|
int err; |
|
int direct; |
|
snd_pcm_format_t format, sformat; |
|
int n; |
|
const struct snd_mask *sformat_mask; |
|
struct snd_mask mask; |
|
|
|
if (!runtime->oss.params) |
|
return 0; |
|
sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); |
|
params = kmalloc(sizeof(*params), GFP_KERNEL); |
|
sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); |
|
if (!sw_params || !params || !sparams) { |
|
err = -ENOMEM; |
|
goto failure; |
|
} |
|
|
|
if (atomic_read(&substream->mmap_count)) |
|
direct = 1; |
|
else |
|
direct = substream->oss.setup.direct; |
|
|
|
_snd_pcm_hw_params_any(sparams); |
|
_snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); |
|
_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); |
|
snd_mask_none(&mask); |
|
if (atomic_read(&substream->mmap_count)) |
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
|
else { |
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
|
if (!direct) |
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
|
} |
|
err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); |
|
if (err < 0) { |
|
pcm_dbg(substream->pcm, "No usable accesses\n"); |
|
err = -EINVAL; |
|
goto failure; |
|
} |
|
choose_rate(substream, sparams, runtime->oss.rate); |
|
snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); |
|
|
|
format = snd_pcm_oss_format_from(runtime->oss.format); |
|
|
|
sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); |
|
if (direct) |
|
sformat = format; |
|
else |
|
sformat = snd_pcm_plug_slave_format(format, sformat_mask); |
|
|
|
if ((__force int)sformat < 0 || |
|
!snd_mask_test_format(sformat_mask, sformat)) { |
|
pcm_for_each_format(sformat) { |
|
if (snd_mask_test_format(sformat_mask, sformat) && |
|
snd_pcm_oss_format_to(sformat) >= 0) |
|
goto format_found; |
|
} |
|
pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); |
|
err = -EINVAL; |
|
goto failure; |
|
} |
|
format_found: |
|
err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); |
|
if (err < 0) |
|
goto failure; |
|
|
|
if (direct) { |
|
memcpy(params, sparams, sizeof(*params)); |
|
} else { |
|
_snd_pcm_hw_params_any(params); |
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, |
|
(__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); |
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, |
|
(__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); |
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, |
|
runtime->oss.channels, 0); |
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, |
|
runtime->oss.rate, 0); |
|
pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", |
|
params_access(params), params_format(params), |
|
params_channels(params), params_rate(params)); |
|
} |
|
pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", |
|
params_access(sparams), params_format(sparams), |
|
params_channels(sparams), params_rate(sparams)); |
|
|
|
oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * |
|
params_channels(params) / 8; |
|
|
|
err = snd_pcm_oss_period_size(substream, params, sparams); |
|
if (err < 0) |
|
goto failure; |
|
|
|
n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); |
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); |
|
if (err < 0) |
|
goto failure; |
|
|
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, |
|
runtime->oss.periods, NULL); |
|
if (err < 0) |
|
goto failure; |
|
|
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); |
|
if (err < 0) { |
|
pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); |
|
goto failure; |
|
} |
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
snd_pcm_oss_plugin_clear(substream); |
|
if (!direct) { |
|
/* add necessary plugins */ |
|
snd_pcm_oss_plugin_clear(substream); |
|
if ((err = snd_pcm_plug_format_plugins(substream, |
|
params, |
|
sparams)) < 0) { |
|
pcm_dbg(substream->pcm, |
|
"snd_pcm_plug_format_plugins failed: %i\n", err); |
|
snd_pcm_oss_plugin_clear(substream); |
|
goto failure; |
|
} |
|
if (runtime->oss.plugin_first) { |
|
struct snd_pcm_plugin *plugin; |
|
if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { |
|
pcm_dbg(substream->pcm, |
|
"snd_pcm_plugin_build_io failed: %i\n", err); |
|
snd_pcm_oss_plugin_clear(substream); |
|
goto failure; |
|
} |
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
err = snd_pcm_plugin_append(plugin); |
|
} else { |
|
err = snd_pcm_plugin_insert(plugin); |
|
} |
|
if (err < 0) { |
|
snd_pcm_oss_plugin_clear(substream); |
|
goto failure; |
|
} |
|
} |
|
} |
|
#endif |
|
|
|
if (runtime->oss.trigger) { |
|
sw_params->start_threshold = 1; |
|
} else { |
|
sw_params->start_threshold = runtime->boundary; |
|
} |
|
if (atomic_read(&substream->mmap_count) || |
|
substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
|
sw_params->stop_threshold = runtime->boundary; |
|
else |
|
sw_params->stop_threshold = runtime->buffer_size; |
|
sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; |
|
sw_params->period_step = 1; |
|
sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? |
|
1 : runtime->period_size; |
|
if (atomic_read(&substream->mmap_count) || |
|
substream->oss.setup.nosilence) { |
|
sw_params->silence_threshold = 0; |
|
sw_params->silence_size = 0; |
|
} else { |
|
snd_pcm_uframes_t frames; |
|
frames = runtime->period_size + 16; |
|
if (frames > runtime->buffer_size) |
|
frames = runtime->buffer_size; |
|
sw_params->silence_threshold = frames; |
|
sw_params->silence_size = frames; |
|
} |
|
|
|
if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { |
|
pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); |
|
goto failure; |
|
} |
|
|
|
runtime->oss.periods = params_periods(sparams); |
|
oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); |
|
if (oss_period_size < 0) { |
|
err = -EINVAL; |
|
goto failure; |
|
} |
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
if (runtime->oss.plugin_first) { |
|
err = snd_pcm_plug_alloc(substream, oss_period_size); |
|
if (err < 0) |
|
goto failure; |
|
} |
|
#endif |
|
oss_period_size *= oss_frame_size; |
|
|
|
oss_buffer_size = oss_period_size * runtime->oss.periods; |
|
if (oss_buffer_size < 0) { |
|
err = -EINVAL; |
|
goto failure; |
|
} |
|
|
|
runtime->oss.period_bytes = oss_period_size; |
|
runtime->oss.buffer_bytes = oss_buffer_size; |
|
|
|
pdprintf("oss: period bytes = %i, buffer bytes = %i\n", |
|
runtime->oss.period_bytes, |
|
runtime->oss.buffer_bytes); |
|
pdprintf("slave: period_size = %i, buffer_size = %i\n", |
|
params_period_size(sparams), |
|
params_buffer_size(sparams)); |
|
|
|
runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); |
|
runtime->oss.channels = params_channels(params); |
|
runtime->oss.rate = params_rate(params); |
|
|
|
kvfree(runtime->oss.buffer); |
|
runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); |
|
if (!runtime->oss.buffer) { |
|
err = -ENOMEM; |
|
goto failure; |
|
} |
|
|
|
runtime->oss.params = 0; |
|
runtime->oss.prepare = 1; |
|
runtime->oss.buffer_used = 0; |
|
if (runtime->dma_area) |
|
snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); |
|
|
|
runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); |
|
|
|
err = 0; |
|
failure: |
|
kfree(sw_params); |
|
kfree(params); |
|
kfree(sparams); |
|
return err; |
|
} |
|
|
|
/* this one takes the lock by itself */ |
|
static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, |
|
bool trylock) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
int err; |
|
|
|
if (trylock) { |
|
if (!(mutex_trylock(&runtime->oss.params_lock))) |
|
return -EAGAIN; |
|
} else if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
|
return -ERESTARTSYS; |
|
|
|
err = snd_pcm_oss_change_params_locked(substream); |
|
mutex_unlock(&runtime->oss.params_lock); |
|
return err; |
|
} |
|
|
|
static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) |
|
{ |
|
int idx, err; |
|
struct snd_pcm_substream *asubstream = NULL, *substream; |
|
|
|
for (idx = 0; idx < 2; idx++) { |
|
substream = pcm_oss_file->streams[idx]; |
|
if (substream == NULL) |
|
continue; |
|
if (asubstream == NULL) |
|
asubstream = substream; |
|
if (substream->runtime->oss.params) { |
|
err = snd_pcm_oss_change_params(substream, false); |
|
if (err < 0) |
|
return err; |
|
} |
|
} |
|
if (!asubstream) |
|
return -EIO; |
|
if (r_substream) |
|
*r_substream = asubstream; |
|
return 0; |
|
} |
|
|
|
/* call with params_lock held */ |
|
/* NOTE: this always call PREPARE unconditionally no matter whether |
|
* runtime->oss.prepare is set or not |
|
*/ |
|
static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) |
|
{ |
|
int err; |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); |
|
if (err < 0) { |
|
pcm_dbg(substream->pcm, |
|
"snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); |
|
return err; |
|
} |
|
runtime->oss.prepare = 0; |
|
runtime->oss.prev_hw_ptr_period = 0; |
|
runtime->oss.period_ptr = 0; |
|
runtime->oss.buffer_used = 0; |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
int err; |
|
|
|
runtime = substream->runtime; |
|
if (runtime->oss.params) { |
|
err = snd_pcm_oss_change_params(substream, false); |
|
if (err < 0) |
|
return err; |
|
} |
|
if (runtime->oss.prepare) { |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
|
return -ERESTARTSYS; |
|
err = snd_pcm_oss_prepare(substream); |
|
mutex_unlock(&runtime->oss.params_lock); |
|
if (err < 0) |
|
return err; |
|
} |
|
return 0; |
|
} |
|
|
|
/* call with params_lock held */ |
|
static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
int err; |
|
|
|
runtime = substream->runtime; |
|
if (runtime->oss.params) { |
|
err = snd_pcm_oss_change_params_locked(substream); |
|
if (err < 0) |
|
return err; |
|
} |
|
if (runtime->oss.prepare) { |
|
err = snd_pcm_oss_prepare(substream); |
|
if (err < 0) |
|
return err; |
|
} |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
snd_pcm_uframes_t frames; |
|
int err = 0; |
|
|
|
while (1) { |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); |
|
if (err < 0) |
|
break; |
|
runtime = substream->runtime; |
|
if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) |
|
break; |
|
/* in case of overrun, skip whole periods like OSS/Linux driver does */ |
|
/* until avail(delay) <= buffer_size */ |
|
frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; |
|
frames /= runtime->period_size; |
|
frames *= runtime->period_size; |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); |
|
if (err < 0) |
|
break; |
|
} |
|
return err; |
|
} |
|
|
|
snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
int ret; |
|
while (1) { |
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: write: recovering from %s\n", |
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ? |
|
"XRUN" : "SUSPEND"); |
|
#endif |
|
ret = snd_pcm_oss_prepare(substream); |
|
if (ret < 0) |
|
break; |
|
} |
|
mutex_unlock(&runtime->oss.params_lock); |
|
ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, |
|
frames, in_kernel); |
|
mutex_lock(&runtime->oss.params_lock); |
|
if (ret != -EPIPE && ret != -ESTRPIPE) |
|
break; |
|
/* test, if we can't store new data, because the stream */ |
|
/* has not been started */ |
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) |
|
return -EAGAIN; |
|
} |
|
return ret; |
|
} |
|
|
|
snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
snd_pcm_sframes_t delay; |
|
int ret; |
|
while (1) { |
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: read: recovering from %s\n", |
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ? |
|
"XRUN" : "SUSPEND"); |
|
#endif |
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
|
if (ret < 0) |
|
break; |
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { |
|
ret = snd_pcm_oss_prepare(substream); |
|
if (ret < 0) |
|
break; |
|
} |
|
ret = snd_pcm_oss_capture_position_fixup(substream, &delay); |
|
if (ret < 0) |
|
break; |
|
mutex_unlock(&runtime->oss.params_lock); |
|
ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, |
|
frames, in_kernel); |
|
mutex_lock(&runtime->oss.params_lock); |
|
if (ret == -EPIPE) { |
|
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
|
if (ret < 0) |
|
break; |
|
} |
|
continue; |
|
} |
|
if (ret != -ESTRPIPE) |
|
break; |
|
} |
|
return ret; |
|
} |
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
int ret; |
|
while (1) { |
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: writev: recovering from %s\n", |
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ? |
|
"XRUN" : "SUSPEND"); |
|
#endif |
|
ret = snd_pcm_oss_prepare(substream); |
|
if (ret < 0) |
|
break; |
|
} |
|
ret = snd_pcm_kernel_writev(substream, bufs, frames); |
|
if (ret != -EPIPE && ret != -ESTRPIPE) |
|
break; |
|
|
|
/* test, if we can't store new data, because the stream */ |
|
/* has not been started */ |
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) |
|
return -EAGAIN; |
|
} |
|
return ret; |
|
} |
|
|
|
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
int ret; |
|
while (1) { |
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: readv: recovering from %s\n", |
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ? |
|
"XRUN" : "SUSPEND"); |
|
#endif |
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
|
if (ret < 0) |
|
break; |
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { |
|
ret = snd_pcm_oss_prepare(substream); |
|
if (ret < 0) |
|
break; |
|
} |
|
ret = snd_pcm_kernel_readv(substream, bufs, frames); |
|
if (ret != -EPIPE && ret != -ESTRPIPE) |
|
break; |
|
} |
|
return ret; |
|
} |
|
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */ |
|
|
|
static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
snd_pcm_sframes_t frames, frames1; |
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
if (runtime->oss.plugin_first) { |
|
struct snd_pcm_plugin_channel *channels; |
|
size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; |
|
if (!in_kernel) { |
|
if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) |
|
return -EFAULT; |
|
buf = runtime->oss.buffer; |
|
} |
|
frames = bytes / oss_frame_bytes; |
|
frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); |
|
if (frames1 < 0) |
|
return frames1; |
|
frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); |
|
if (frames1 <= 0) |
|
return frames1; |
|
bytes = frames1 * oss_frame_bytes; |
|
} else |
|
#endif |
|
{ |
|
frames = bytes_to_frames(runtime, bytes); |
|
frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); |
|
if (frames1 <= 0) |
|
return frames1; |
|
bytes = frames_to_bytes(runtime, frames1); |
|
} |
|
return bytes; |
|
} |
|
|
|
static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) |
|
{ |
|
size_t xfer = 0; |
|
ssize_t tmp = 0; |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
|
|
if (atomic_read(&substream->mmap_count)) |
|
return -ENXIO; |
|
|
|
atomic_inc(&runtime->oss.rw_ref); |
|
while (bytes > 0) { |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
|
tmp = -ERESTARTSYS; |
|
break; |
|
} |
|
tmp = snd_pcm_oss_make_ready_locked(substream); |
|
if (tmp < 0) |
|
goto err; |
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
|
tmp = bytes; |
|
if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) |
|
tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; |
|
if (tmp > 0) { |
|
if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { |
|
tmp = -EFAULT; |
|
goto err; |
|
} |
|
} |
|
runtime->oss.buffer_used += tmp; |
|
buf += tmp; |
|
bytes -= tmp; |
|
xfer += tmp; |
|
if (substream->oss.setup.partialfrag || |
|
runtime->oss.buffer_used == runtime->oss.period_bytes) { |
|
tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, |
|
runtime->oss.buffer_used - runtime->oss.period_ptr, 1); |
|
if (tmp <= 0) |
|
goto err; |
|
runtime->oss.bytes += tmp; |
|
runtime->oss.period_ptr += tmp; |
|
runtime->oss.period_ptr %= runtime->oss.period_bytes; |
|
if (runtime->oss.period_ptr == 0 || |
|
runtime->oss.period_ptr == runtime->oss.buffer_used) |
|
runtime->oss.buffer_used = 0; |
|
else if ((substream->f_flags & O_NONBLOCK) != 0) { |
|
tmp = -EAGAIN; |
|
goto err; |
|
} |
|
} |
|
} else { |
|
tmp = snd_pcm_oss_write2(substream, |
|
(const char __force *)buf, |
|
runtime->oss.period_bytes, 0); |
|
if (tmp <= 0) |
|
goto err; |
|
runtime->oss.bytes += tmp; |
|
buf += tmp; |
|
bytes -= tmp; |
|
xfer += tmp; |
|
if ((substream->f_flags & O_NONBLOCK) != 0 && |
|
tmp != runtime->oss.period_bytes) |
|
tmp = -EAGAIN; |
|
} |
|
err: |
|
mutex_unlock(&runtime->oss.params_lock); |
|
if (tmp < 0) |
|
break; |
|
if (signal_pending(current)) { |
|
tmp = -ERESTARTSYS; |
|
break; |
|
} |
|
tmp = 0; |
|
} |
|
atomic_dec(&runtime->oss.rw_ref); |
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
|
} |
|
|
|
static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
snd_pcm_sframes_t frames, frames1; |
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
char __user *final_dst = (char __force __user *)buf; |
|
if (runtime->oss.plugin_first) { |
|
struct snd_pcm_plugin_channel *channels; |
|
size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; |
|
if (!in_kernel) |
|
buf = runtime->oss.buffer; |
|
frames = bytes / oss_frame_bytes; |
|
frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); |
|
if (frames1 < 0) |
|
return frames1; |
|
frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); |
|
if (frames1 <= 0) |
|
return frames1; |
|
bytes = frames1 * oss_frame_bytes; |
|
if (!in_kernel && copy_to_user(final_dst, buf, bytes)) |
|
return -EFAULT; |
|
} else |
|
#endif |
|
{ |
|
frames = bytes_to_frames(runtime, bytes); |
|
frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); |
|
if (frames1 <= 0) |
|
return frames1; |
|
bytes = frames_to_bytes(runtime, frames1); |
|
} |
|
return bytes; |
|
} |
|
|
|
static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) |
|
{ |
|
size_t xfer = 0; |
|
ssize_t tmp = 0; |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
|
|
if (atomic_read(&substream->mmap_count)) |
|
return -ENXIO; |
|
|
|
atomic_inc(&runtime->oss.rw_ref); |
|
while (bytes > 0) { |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
|
tmp = -ERESTARTSYS; |
|
break; |
|
} |
|
tmp = snd_pcm_oss_make_ready_locked(substream); |
|
if (tmp < 0) |
|
goto err; |
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
|
if (runtime->oss.buffer_used == 0) { |
|
tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); |
|
if (tmp <= 0) |
|
goto err; |
|
runtime->oss.bytes += tmp; |
|
runtime->oss.period_ptr = tmp; |
|
runtime->oss.buffer_used = tmp; |
|
} |
|
tmp = bytes; |
|
if ((size_t) tmp > runtime->oss.buffer_used) |
|
tmp = runtime->oss.buffer_used; |
|
if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { |
|
tmp = -EFAULT; |
|
goto err; |
|
} |
|
buf += tmp; |
|
bytes -= tmp; |
|
xfer += tmp; |
|
runtime->oss.buffer_used -= tmp; |
|
} else { |
|
tmp = snd_pcm_oss_read2(substream, (char __force *)buf, |
|
runtime->oss.period_bytes, 0); |
|
if (tmp <= 0) |
|
goto err; |
|
runtime->oss.bytes += tmp; |
|
buf += tmp; |
|
bytes -= tmp; |
|
xfer += tmp; |
|
} |
|
err: |
|
mutex_unlock(&runtime->oss.params_lock); |
|
if (tmp < 0) |
|
break; |
|
if (signal_pending(current)) { |
|
tmp = -ERESTARTSYS; |
|
break; |
|
} |
|
tmp = 0; |
|
} |
|
atomic_dec(&runtime->oss.rw_ref); |
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
|
} |
|
|
|
static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_runtime *runtime; |
|
int i; |
|
|
|
for (i = 0; i < 2; i++) { |
|
substream = pcm_oss_file->streams[i]; |
|
if (!substream) |
|
continue; |
|
runtime = substream->runtime; |
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
|
mutex_lock(&runtime->oss.params_lock); |
|
runtime->oss.prepare = 1; |
|
runtime->oss.buffer_used = 0; |
|
runtime->oss.prev_hw_ptr_period = 0; |
|
runtime->oss.period_ptr = 0; |
|
mutex_unlock(&runtime->oss.params_lock); |
|
} |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream != NULL) { |
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
|
return err; |
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); |
|
} |
|
/* note: all errors from the start action are ignored */ |
|
/* OSS apps do not know, how to handle them */ |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
ssize_t result = 0; |
|
snd_pcm_state_t state; |
|
long res; |
|
wait_queue_entry_t wait; |
|
|
|
runtime = substream->runtime; |
|
init_waitqueue_entry(&wait, current); |
|
add_wait_queue(&runtime->sleep, &wait); |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, "sync1: size = %li\n", size); |
|
#endif |
|
while (1) { |
|
result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); |
|
if (result > 0) { |
|
runtime->oss.buffer_used = 0; |
|
result = 0; |
|
break; |
|
} |
|
if (result != 0 && result != -EAGAIN) |
|
break; |
|
result = 0; |
|
set_current_state(TASK_INTERRUPTIBLE); |
|
snd_pcm_stream_lock_irq(substream); |
|
state = runtime->status->state; |
|
snd_pcm_stream_unlock_irq(substream); |
|
if (state != SNDRV_PCM_STATE_RUNNING) { |
|
set_current_state(TASK_RUNNING); |
|
break; |
|
} |
|
res = schedule_timeout(10 * HZ); |
|
if (signal_pending(current)) { |
|
result = -ERESTARTSYS; |
|
break; |
|
} |
|
if (res == 0) { |
|
pcm_err(substream->pcm, |
|
"OSS sync error - DMA timeout\n"); |
|
result = -EIO; |
|
break; |
|
} |
|
} |
|
remove_wait_queue(&runtime->sleep, &wait); |
|
return result; |
|
} |
|
|
|
static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
int err = 0; |
|
unsigned int saved_f_flags; |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_runtime *runtime; |
|
snd_pcm_format_t format; |
|
unsigned long width; |
|
size_t size; |
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream != NULL) { |
|
runtime = substream->runtime; |
|
if (atomic_read(&substream->mmap_count)) |
|
goto __direct; |
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
|
return err; |
|
atomic_inc(&runtime->oss.rw_ref); |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) { |
|
atomic_dec(&runtime->oss.rw_ref); |
|
return -ERESTARTSYS; |
|
} |
|
format = snd_pcm_oss_format_from(runtime->oss.format); |
|
width = snd_pcm_format_physical_width(format); |
|
if (runtime->oss.buffer_used > 0) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, "sync: buffer_used\n"); |
|
#endif |
|
size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; |
|
snd_pcm_format_set_silence(format, |
|
runtime->oss.buffer + runtime->oss.buffer_used, |
|
size); |
|
err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); |
|
if (err < 0) |
|
goto unlock; |
|
} else if (runtime->oss.period_ptr > 0) { |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, "sync: period_ptr\n"); |
|
#endif |
|
size = runtime->oss.period_bytes - runtime->oss.period_ptr; |
|
snd_pcm_format_set_silence(format, |
|
runtime->oss.buffer, |
|
size * 8 / width); |
|
err = snd_pcm_oss_sync1(substream, size); |
|
if (err < 0) |
|
goto unlock; |
|
} |
|
/* |
|
* The ALSA's period might be a bit large than OSS one. |
|
* Fill the remain portion of ALSA period with zeros. |
|
*/ |
|
size = runtime->control->appl_ptr % runtime->period_size; |
|
if (size > 0) { |
|
size = runtime->period_size - size; |
|
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
|
snd_pcm_lib_write(substream, NULL, size); |
|
else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
|
snd_pcm_lib_writev(substream, NULL, size); |
|
} |
|
unlock: |
|
mutex_unlock(&runtime->oss.params_lock); |
|
atomic_dec(&runtime->oss.rw_ref); |
|
if (err < 0) |
|
return err; |
|
/* |
|
* finish sync: drain the buffer |
|
*/ |
|
__direct: |
|
saved_f_flags = substream->f_flags; |
|
substream->f_flags &= ~O_NONBLOCK; |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
|
substream->f_flags = saved_f_flags; |
|
if (err < 0) |
|
return err; |
|
mutex_lock(&runtime->oss.params_lock); |
|
runtime->oss.prepare = 1; |
|
mutex_unlock(&runtime->oss.params_lock); |
|
} |
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
if (substream != NULL) { |
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
|
return err; |
|
runtime = substream->runtime; |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
|
if (err < 0) |
|
return err; |
|
mutex_lock(&runtime->oss.params_lock); |
|
runtime->oss.buffer_used = 0; |
|
runtime->oss.prepare = 1; |
|
mutex_unlock(&runtime->oss.params_lock); |
|
} |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) |
|
{ |
|
int idx; |
|
|
|
for (idx = 1; idx >= 0; --idx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
struct snd_pcm_runtime *runtime; |
|
int err; |
|
|
|
if (substream == NULL) |
|
continue; |
|
runtime = substream->runtime; |
|
if (rate < 1000) |
|
rate = 1000; |
|
else if (rate > 192000) |
|
rate = 192000; |
|
err = lock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
if (runtime->oss.rate != rate) { |
|
runtime->oss.params = 1; |
|
runtime->oss.rate = rate; |
|
} |
|
unlock_params(runtime); |
|
} |
|
return snd_pcm_oss_get_rate(pcm_oss_file); |
|
} |
|
|
|
static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
|
return err; |
|
return substream->runtime->oss.rate; |
|
} |
|
|
|
static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) |
|
{ |
|
int idx; |
|
if (channels < 1) |
|
channels = 1; |
|
if (channels > 128) |
|
return -EINVAL; |
|
for (idx = 1; idx >= 0; --idx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
struct snd_pcm_runtime *runtime; |
|
int err; |
|
|
|
if (substream == NULL) |
|
continue; |
|
runtime = substream->runtime; |
|
err = lock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
if (runtime->oss.channels != channels) { |
|
runtime->oss.params = 1; |
|
runtime->oss.channels = channels; |
|
} |
|
unlock_params(runtime); |
|
} |
|
return snd_pcm_oss_get_channels(pcm_oss_file); |
|
} |
|
|
|
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
|
return err; |
|
return substream->runtime->oss.channels; |
|
} |
|
|
|
static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
|
return err; |
|
return substream->runtime->oss.period_bytes; |
|
} |
|
|
|
static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
int direct; |
|
struct snd_pcm_hw_params *params; |
|
unsigned int formats = 0; |
|
const struct snd_mask *format_mask; |
|
int fmt; |
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
|
return err; |
|
if (atomic_read(&substream->mmap_count)) |
|
direct = 1; |
|
else |
|
direct = substream->oss.setup.direct; |
|
if (!direct) |
|
return AFMT_MU_LAW | AFMT_U8 | |
|
AFMT_S16_LE | AFMT_S16_BE | |
|
AFMT_S8 | AFMT_U16_LE | |
|
AFMT_U16_BE | |
|
AFMT_S32_LE | AFMT_S32_BE | |
|
AFMT_S24_LE | AFMT_S24_BE | |
|
AFMT_S24_PACKED; |
|
params = kmalloc(sizeof(*params), GFP_KERNEL); |
|
if (!params) |
|
return -ENOMEM; |
|
_snd_pcm_hw_params_any(params); |
|
err = snd_pcm_hw_refine(substream, params); |
|
if (err < 0) |
|
goto error; |
|
format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); |
|
for (fmt = 0; fmt < 32; ++fmt) { |
|
if (snd_mask_test(format_mask, fmt)) { |
|
int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); |
|
if (f >= 0) |
|
formats |= f; |
|
} |
|
} |
|
|
|
error: |
|
kfree(params); |
|
return err < 0 ? err : formats; |
|
} |
|
|
|
static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) |
|
{ |
|
int formats, idx; |
|
int err; |
|
|
|
if (format != AFMT_QUERY) { |
|
formats = snd_pcm_oss_get_formats(pcm_oss_file); |
|
if (formats < 0) |
|
return formats; |
|
if (!(formats & format)) |
|
format = AFMT_U8; |
|
for (idx = 1; idx >= 0; --idx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
struct snd_pcm_runtime *runtime; |
|
if (substream == NULL) |
|
continue; |
|
runtime = substream->runtime; |
|
err = lock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
if (runtime->oss.format != format) { |
|
runtime->oss.params = 1; |
|
runtime->oss.format = format; |
|
} |
|
unlock_params(runtime); |
|
} |
|
} |
|
return snd_pcm_oss_get_format(pcm_oss_file); |
|
} |
|
|
|
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
int err; |
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
|
return err; |
|
return substream->runtime->oss.format; |
|
} |
|
|
|
static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
|
|
runtime = substream->runtime; |
|
if (subdivide == 0) { |
|
subdivide = runtime->oss.subdivision; |
|
if (subdivide == 0) |
|
subdivide = 1; |
|
return subdivide; |
|
} |
|
if (runtime->oss.subdivision || runtime->oss.fragshift) |
|
return -EINVAL; |
|
if (subdivide != 1 && subdivide != 2 && subdivide != 4 && |
|
subdivide != 8 && subdivide != 16) |
|
return -EINVAL; |
|
runtime->oss.subdivision = subdivide; |
|
runtime->oss.params = 1; |
|
return subdivide; |
|
} |
|
|
|
static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) |
|
{ |
|
int err = -EINVAL, idx; |
|
|
|
for (idx = 1; idx >= 0; --idx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
struct snd_pcm_runtime *runtime; |
|
|
|
if (substream == NULL) |
|
continue; |
|
runtime = substream->runtime; |
|
err = lock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
err = snd_pcm_oss_set_subdivide1(substream, subdivide); |
|
unlock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
} |
|
return err; |
|
} |
|
|
|
static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
int fragshift; |
|
|
|
runtime = substream->runtime; |
|
if (runtime->oss.subdivision || runtime->oss.fragshift) |
|
return -EINVAL; |
|
fragshift = val & 0xffff; |
|
if (fragshift >= 31) |
|
return -EINVAL; |
|
runtime->oss.fragshift = fragshift; |
|
runtime->oss.maxfrags = (val >> 16) & 0xffff; |
|
if (runtime->oss.fragshift < 4) /* < 16 */ |
|
runtime->oss.fragshift = 4; |
|
if (runtime->oss.maxfrags < 2) |
|
runtime->oss.maxfrags = 2; |
|
runtime->oss.params = 1; |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) |
|
{ |
|
int err = -EINVAL, idx; |
|
|
|
for (idx = 1; idx >= 0; --idx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
struct snd_pcm_runtime *runtime; |
|
|
|
if (substream == NULL) |
|
continue; |
|
runtime = substream->runtime; |
|
err = lock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
err = snd_pcm_oss_set_fragment1(substream, val); |
|
unlock_params(runtime); |
|
if (err < 0) |
|
return err; |
|
} |
|
return err; |
|
} |
|
|
|
static int snd_pcm_oss_nonblock(struct file * file) |
|
{ |
|
spin_lock(&file->f_lock); |
|
file->f_flags |= O_NONBLOCK; |
|
spin_unlock(&file->f_lock); |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) |
|
{ |
|
|
|
if (substream == NULL) { |
|
res &= ~DSP_CAP_DUPLEX; |
|
return res; |
|
} |
|
#ifdef DSP_CAP_MULTI |
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
if (substream->pstr->substream_count > 1) |
|
res |= DSP_CAP_MULTI; |
|
#endif |
|
/* DSP_CAP_REALTIME is set all times: */ |
|
/* all ALSA drivers can return actual pointer in ring buffer */ |
|
#if defined(DSP_CAP_REALTIME) && 0 |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) |
|
res &= ~DSP_CAP_REALTIME; |
|
} |
|
#endif |
|
return res; |
|
} |
|
|
|
static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
int result, idx; |
|
|
|
result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; |
|
for (idx = 0; idx < 2; idx++) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; |
|
result = snd_pcm_oss_get_caps1(substream, result); |
|
} |
|
result |= 0x0001; /* revision - same as SB AWE 64 */ |
|
return result; |
|
} |
|
|
|
static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, |
|
snd_pcm_uframes_t hw_ptr) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
snd_pcm_uframes_t appl_ptr; |
|
appl_ptr = hw_ptr + runtime->buffer_size; |
|
appl_ptr %= runtime->boundary; |
|
runtime->control->appl_ptr = appl_ptr; |
|
} |
|
|
|
static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
|
int err, cmd; |
|
|
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); |
|
#endif |
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
|
|
if (psubstream) { |
|
if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) |
|
return err; |
|
} |
|
if (csubstream) { |
|
if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) |
|
return err; |
|
} |
|
if (psubstream) { |
|
runtime = psubstream->runtime; |
|
cmd = 0; |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
|
return -ERESTARTSYS; |
|
if (trigger & PCM_ENABLE_OUTPUT) { |
|
if (runtime->oss.trigger) |
|
goto _skip1; |
|
if (atomic_read(&psubstream->mmap_count)) |
|
snd_pcm_oss_simulate_fill(psubstream, |
|
get_hw_ptr_period(runtime)); |
|
runtime->oss.trigger = 1; |
|
runtime->start_threshold = 1; |
|
cmd = SNDRV_PCM_IOCTL_START; |
|
} else { |
|
if (!runtime->oss.trigger) |
|
goto _skip1; |
|
runtime->oss.trigger = 0; |
|
runtime->start_threshold = runtime->boundary; |
|
cmd = SNDRV_PCM_IOCTL_DROP; |
|
runtime->oss.prepare = 1; |
|
} |
|
_skip1: |
|
mutex_unlock(&runtime->oss.params_lock); |
|
if (cmd) { |
|
err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); |
|
if (err < 0) |
|
return err; |
|
} |
|
} |
|
if (csubstream) { |
|
runtime = csubstream->runtime; |
|
cmd = 0; |
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) |
|
return -ERESTARTSYS; |
|
if (trigger & PCM_ENABLE_INPUT) { |
|
if (runtime->oss.trigger) |
|
goto _skip2; |
|
runtime->oss.trigger = 1; |
|
runtime->start_threshold = 1; |
|
cmd = SNDRV_PCM_IOCTL_START; |
|
} else { |
|
if (!runtime->oss.trigger) |
|
goto _skip2; |
|
runtime->oss.trigger = 0; |
|
runtime->start_threshold = runtime->boundary; |
|
cmd = SNDRV_PCM_IOCTL_DROP; |
|
runtime->oss.prepare = 1; |
|
} |
|
_skip2: |
|
mutex_unlock(&runtime->oss.params_lock); |
|
if (cmd) { |
|
err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); |
|
if (err < 0) |
|
return err; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
|
int result = 0; |
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) |
|
result |= PCM_ENABLE_OUTPUT; |
|
if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) |
|
result |= PCM_ENABLE_INPUT; |
|
return result; |
|
} |
|
|
|
static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_runtime *runtime; |
|
snd_pcm_sframes_t delay; |
|
int err; |
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream == NULL) |
|
return -EINVAL; |
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
|
return err; |
|
runtime = substream->runtime; |
|
if (runtime->oss.params || runtime->oss.prepare) |
|
return 0; |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
|
if (err == -EPIPE) |
|
delay = 0; /* hack for broken OSS applications */ |
|
else if (err < 0) |
|
return err; |
|
return snd_pcm_oss_bytes(substream, delay); |
|
} |
|
|
|
static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_runtime *runtime; |
|
snd_pcm_sframes_t delay; |
|
int fixup; |
|
struct count_info info; |
|
int err; |
|
|
|
if (_info == NULL) |
|
return -EFAULT; |
|
substream = pcm_oss_file->streams[stream]; |
|
if (substream == NULL) |
|
return -EINVAL; |
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
|
return err; |
|
runtime = substream->runtime; |
|
if (runtime->oss.params || runtime->oss.prepare) { |
|
memset(&info, 0, sizeof(info)); |
|
if (copy_to_user(_info, &info, sizeof(info))) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { |
|
err = 0; |
|
delay = 0; |
|
fixup = 0; |
|
} else { |
|
fixup = runtime->oss.buffer_used; |
|
} |
|
} else { |
|
err = snd_pcm_oss_capture_position_fixup(substream, &delay); |
|
fixup = -runtime->oss.buffer_used; |
|
} |
|
if (err < 0) |
|
return err; |
|
info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); |
|
if (atomic_read(&substream->mmap_count)) { |
|
snd_pcm_sframes_t n; |
|
delay = get_hw_ptr_period(runtime); |
|
n = delay - runtime->oss.prev_hw_ptr_period; |
|
if (n < 0) |
|
n += runtime->boundary; |
|
info.blocks = n / runtime->period_size; |
|
runtime->oss.prev_hw_ptr_period = delay; |
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
snd_pcm_oss_simulate_fill(substream, delay); |
|
info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; |
|
} else { |
|
delay = snd_pcm_oss_bytes(substream, delay); |
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
if (substream->oss.setup.buggyptr) |
|
info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; |
|
else |
|
info.blocks = (delay + fixup) / runtime->oss.period_bytes; |
|
info.bytes = (runtime->oss.bytes - delay) & INT_MAX; |
|
} else { |
|
delay += fixup; |
|
info.blocks = delay / runtime->oss.period_bytes; |
|
info.bytes = (runtime->oss.bytes + delay) & INT_MAX; |
|
} |
|
} |
|
if (copy_to_user(_info, &info, sizeof(info))) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) |
|
{ |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_runtime *runtime; |
|
snd_pcm_sframes_t avail; |
|
int fixup; |
|
struct audio_buf_info info; |
|
int err; |
|
|
|
if (_info == NULL) |
|
return -EFAULT; |
|
substream = pcm_oss_file->streams[stream]; |
|
if (substream == NULL) |
|
return -EINVAL; |
|
runtime = substream->runtime; |
|
|
|
if (runtime->oss.params && |
|
(err = snd_pcm_oss_change_params(substream, false)) < 0) |
|
return err; |
|
|
|
info.fragsize = runtime->oss.period_bytes; |
|
info.fragstotal = runtime->periods; |
|
if (runtime->oss.prepare) { |
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
info.bytes = runtime->oss.period_bytes * runtime->oss.periods; |
|
info.fragments = runtime->oss.periods; |
|
} else { |
|
info.bytes = 0; |
|
info.fragments = 0; |
|
} |
|
} else { |
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); |
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { |
|
avail = runtime->buffer_size; |
|
err = 0; |
|
fixup = 0; |
|
} else { |
|
avail = runtime->buffer_size - avail; |
|
fixup = -runtime->oss.buffer_used; |
|
} |
|
} else { |
|
err = snd_pcm_oss_capture_position_fixup(substream, &avail); |
|
fixup = runtime->oss.buffer_used; |
|
} |
|
if (err < 0) |
|
return err; |
|
info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; |
|
info.fragments = info.bytes / runtime->oss.period_bytes; |
|
} |
|
|
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", |
|
info.bytes, info.fragments, info.fragstotal, info.fragsize); |
|
#endif |
|
if (copy_to_user(_info, &info, sizeof(info))) |
|
return -EFAULT; |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) |
|
{ |
|
// it won't be probably implemented |
|
// pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); |
|
return -EINVAL; |
|
} |
|
|
|
static const char *strip_task_path(const char *path) |
|
{ |
|
const char *ptr, *ptrl = NULL; |
|
for (ptr = path; *ptr; ptr++) { |
|
if (*ptr == '/') |
|
ptrl = ptr + 1; |
|
} |
|
return ptrl; |
|
} |
|
|
|
static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, |
|
const char *task_name, |
|
struct snd_pcm_oss_setup *rsetup) |
|
{ |
|
struct snd_pcm_oss_setup *setup; |
|
|
|
mutex_lock(&pcm->streams[stream].oss.setup_mutex); |
|
do { |
|
for (setup = pcm->streams[stream].oss.setup_list; setup; |
|
setup = setup->next) { |
|
if (!strcmp(setup->task_name, task_name)) |
|
goto out; |
|
} |
|
} while ((task_name = strip_task_path(task_name)) != NULL); |
|
out: |
|
if (setup) |
|
*rsetup = *setup; |
|
mutex_unlock(&pcm->streams[stream].oss.setup_mutex); |
|
} |
|
|
|
static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
runtime = substream->runtime; |
|
kvfree(runtime->oss.buffer); |
|
runtime->oss.buffer = NULL; |
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
snd_pcm_oss_plugin_clear(substream); |
|
#endif |
|
substream->oss.oss = 0; |
|
} |
|
|
|
static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, |
|
struct snd_pcm_oss_setup *setup, |
|
int minor) |
|
{ |
|
struct snd_pcm_runtime *runtime; |
|
|
|
substream->oss.oss = 1; |
|
substream->oss.setup = *setup; |
|
if (setup->nonblock) |
|
substream->f_flags |= O_NONBLOCK; |
|
else if (setup->block) |
|
substream->f_flags &= ~O_NONBLOCK; |
|
runtime = substream->runtime; |
|
runtime->oss.params = 1; |
|
runtime->oss.trigger = 1; |
|
runtime->oss.rate = 8000; |
|
mutex_init(&runtime->oss.params_lock); |
|
switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
|
case SNDRV_MINOR_OSS_PCM_8: |
|
runtime->oss.format = AFMT_U8; |
|
break; |
|
case SNDRV_MINOR_OSS_PCM_16: |
|
runtime->oss.format = AFMT_S16_LE; |
|
break; |
|
default: |
|
runtime->oss.format = AFMT_MU_LAW; |
|
} |
|
runtime->oss.channels = 1; |
|
runtime->oss.fragshift = 0; |
|
runtime->oss.maxfrags = 0; |
|
runtime->oss.subdivision = 0; |
|
substream->pcm_release = snd_pcm_oss_release_substream; |
|
atomic_set(&runtime->oss.rw_ref, 0); |
|
} |
|
|
|
static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) |
|
{ |
|
int cidx; |
|
if (!pcm_oss_file) |
|
return 0; |
|
for (cidx = 0; cidx < 2; ++cidx) { |
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; |
|
if (substream) |
|
snd_pcm_release_substream(substream); |
|
} |
|
kfree(pcm_oss_file); |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_open_file(struct file *file, |
|
struct snd_pcm *pcm, |
|
struct snd_pcm_oss_file **rpcm_oss_file, |
|
int minor, |
|
struct snd_pcm_oss_setup *setup) |
|
{ |
|
int idx, err; |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
struct snd_pcm_substream *substream; |
|
fmode_t f_mode = file->f_mode; |
|
|
|
if (rpcm_oss_file) |
|
*rpcm_oss_file = NULL; |
|
|
|
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); |
|
if (pcm_oss_file == NULL) |
|
return -ENOMEM; |
|
|
|
if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && |
|
(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) |
|
f_mode = FMODE_WRITE; |
|
|
|
file->f_flags &= ~O_APPEND; |
|
for (idx = 0; idx < 2; idx++) { |
|
if (setup[idx].disable) |
|
continue; |
|
if (! pcm->streams[idx].substream_count) |
|
continue; /* no matching substream */ |
|
if (idx == SNDRV_PCM_STREAM_PLAYBACK) { |
|
if (! (f_mode & FMODE_WRITE)) |
|
continue; |
|
} else { |
|
if (! (f_mode & FMODE_READ)) |
|
continue; |
|
} |
|
err = snd_pcm_open_substream(pcm, idx, file, &substream); |
|
if (err < 0) { |
|
snd_pcm_oss_release_file(pcm_oss_file); |
|
return err; |
|
} |
|
|
|
pcm_oss_file->streams[idx] = substream; |
|
snd_pcm_oss_init_substream(substream, &setup[idx], minor); |
|
} |
|
|
|
if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { |
|
snd_pcm_oss_release_file(pcm_oss_file); |
|
return -EINVAL; |
|
} |
|
|
|
file->private_data = pcm_oss_file; |
|
if (rpcm_oss_file) |
|
*rpcm_oss_file = pcm_oss_file; |
|
return 0; |
|
} |
|
|
|
|
|
static int snd_task_name(struct task_struct *task, char *name, size_t size) |
|
{ |
|
unsigned int idx; |
|
|
|
if (snd_BUG_ON(!task || !name || size < 2)) |
|
return -EINVAL; |
|
for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) |
|
name[idx] = task->comm[idx]; |
|
name[idx] = '\0'; |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_open(struct inode *inode, struct file *file) |
|
{ |
|
int err; |
|
char task_name[32]; |
|
struct snd_pcm *pcm; |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
struct snd_pcm_oss_setup setup[2]; |
|
int nonblock; |
|
wait_queue_entry_t wait; |
|
|
|
err = nonseekable_open(inode, file); |
|
if (err < 0) |
|
return err; |
|
|
|
pcm = snd_lookup_oss_minor_data(iminor(inode), |
|
SNDRV_OSS_DEVICE_TYPE_PCM); |
|
if (pcm == NULL) { |
|
err = -ENODEV; |
|
goto __error1; |
|
} |
|
err = snd_card_file_add(pcm->card, file); |
|
if (err < 0) |
|
goto __error1; |
|
if (!try_module_get(pcm->card->module)) { |
|
err = -EFAULT; |
|
goto __error2; |
|
} |
|
if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { |
|
err = -EFAULT; |
|
goto __error; |
|
} |
|
memset(setup, 0, sizeof(setup)); |
|
if (file->f_mode & FMODE_WRITE) |
|
snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
|
task_name, &setup[0]); |
|
if (file->f_mode & FMODE_READ) |
|
snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, |
|
task_name, &setup[1]); |
|
|
|
nonblock = !!(file->f_flags & O_NONBLOCK); |
|
if (!nonblock) |
|
nonblock = nonblock_open; |
|
|
|
init_waitqueue_entry(&wait, current); |
|
add_wait_queue(&pcm->open_wait, &wait); |
|
mutex_lock(&pcm->open_mutex); |
|
while (1) { |
|
err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, |
|
iminor(inode), setup); |
|
if (err >= 0) |
|
break; |
|
if (err == -EAGAIN) { |
|
if (nonblock) { |
|
err = -EBUSY; |
|
break; |
|
} |
|
} else |
|
break; |
|
set_current_state(TASK_INTERRUPTIBLE); |
|
mutex_unlock(&pcm->open_mutex); |
|
schedule(); |
|
mutex_lock(&pcm->open_mutex); |
|
if (pcm->card->shutdown) { |
|
err = -ENODEV; |
|
break; |
|
} |
|
if (signal_pending(current)) { |
|
err = -ERESTARTSYS; |
|
break; |
|
} |
|
} |
|
remove_wait_queue(&pcm->open_wait, &wait); |
|
mutex_unlock(&pcm->open_mutex); |
|
if (err < 0) |
|
goto __error; |
|
snd_card_unref(pcm->card); |
|
return err; |
|
|
|
__error: |
|
module_put(pcm->card->module); |
|
__error2: |
|
snd_card_file_remove(pcm->card, file); |
|
__error1: |
|
if (pcm) |
|
snd_card_unref(pcm->card); |
|
return err; |
|
} |
|
|
|
static int snd_pcm_oss_release(struct inode *inode, struct file *file) |
|
{ |
|
struct snd_pcm *pcm; |
|
struct snd_pcm_substream *substream; |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
|
|
pcm_oss_file = file->private_data; |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream == NULL) |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
if (snd_BUG_ON(!substream)) |
|
return -ENXIO; |
|
pcm = substream->pcm; |
|
if (!pcm->card->shutdown) |
|
snd_pcm_oss_sync(pcm_oss_file); |
|
mutex_lock(&pcm->open_mutex); |
|
snd_pcm_oss_release_file(pcm_oss_file); |
|
mutex_unlock(&pcm->open_mutex); |
|
wake_up(&pcm->open_wait); |
|
module_put(pcm->card->module); |
|
snd_card_file_remove(pcm->card, file); |
|
return 0; |
|
} |
|
|
|
static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
|
{ |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
int __user *p = (int __user *)arg; |
|
int res; |
|
|
|
pcm_oss_file = file->private_data; |
|
if (cmd == OSS_GETVERSION) |
|
return put_user(SNDRV_OSS_VERSION, p); |
|
if (cmd == OSS_ALSAEMULVER) |
|
return put_user(1, p); |
|
#if IS_REACHABLE(CONFIG_SND_MIXER_OSS) |
|
if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ |
|
struct snd_pcm_substream *substream; |
|
int idx; |
|
for (idx = 0; idx < 2; ++idx) { |
|
substream = pcm_oss_file->streams[idx]; |
|
if (substream != NULL) |
|
break; |
|
} |
|
if (snd_BUG_ON(idx >= 2)) |
|
return -ENXIO; |
|
return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); |
|
} |
|
#endif |
|
if (((cmd >> 8) & 0xff) != 'P') |
|
return -EINVAL; |
|
#ifdef OSS_DEBUG |
|
pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); |
|
#endif |
|
switch (cmd) { |
|
case SNDCTL_DSP_RESET: |
|
return snd_pcm_oss_reset(pcm_oss_file); |
|
case SNDCTL_DSP_SYNC: |
|
return snd_pcm_oss_sync(pcm_oss_file); |
|
case SNDCTL_DSP_SPEED: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) |
|
return res; |
|
return put_user(res, p); |
|
case SOUND_PCM_READ_RATE: |
|
res = snd_pcm_oss_get_rate(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_STEREO: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
res = res > 0 ? 2 : 1; |
|
if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) |
|
return res; |
|
return put_user(--res, p); |
|
case SNDCTL_DSP_GETBLKSIZE: |
|
res = snd_pcm_oss_get_block_size(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_SETFMT: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
res = snd_pcm_oss_set_format(pcm_oss_file, res); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SOUND_PCM_READ_BITS: |
|
res = snd_pcm_oss_get_format(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_CHANNELS: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
res = snd_pcm_oss_set_channels(pcm_oss_file, res); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SOUND_PCM_READ_CHANNELS: |
|
res = snd_pcm_oss_get_channels(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SOUND_PCM_WRITE_FILTER: |
|
case SOUND_PCM_READ_FILTER: |
|
return -EIO; |
|
case SNDCTL_DSP_POST: |
|
return snd_pcm_oss_post(pcm_oss_file); |
|
case SNDCTL_DSP_SUBDIVIDE: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_SETFRAGMENT: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
return snd_pcm_oss_set_fragment(pcm_oss_file, res); |
|
case SNDCTL_DSP_GETFMTS: |
|
res = snd_pcm_oss_get_formats(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_GETOSPACE: |
|
case SNDCTL_DSP_GETISPACE: |
|
return snd_pcm_oss_get_space(pcm_oss_file, |
|
cmd == SNDCTL_DSP_GETISPACE ? |
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
|
(struct audio_buf_info __user *) arg); |
|
case SNDCTL_DSP_NONBLOCK: |
|
return snd_pcm_oss_nonblock(file); |
|
case SNDCTL_DSP_GETCAPS: |
|
res = snd_pcm_oss_get_caps(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_GETTRIGGER: |
|
res = snd_pcm_oss_get_trigger(pcm_oss_file); |
|
if (res < 0) |
|
return res; |
|
return put_user(res, p); |
|
case SNDCTL_DSP_SETTRIGGER: |
|
if (get_user(res, p)) |
|
return -EFAULT; |
|
return snd_pcm_oss_set_trigger(pcm_oss_file, res); |
|
case SNDCTL_DSP_GETIPTR: |
|
case SNDCTL_DSP_GETOPTR: |
|
return snd_pcm_oss_get_ptr(pcm_oss_file, |
|
cmd == SNDCTL_DSP_GETIPTR ? |
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
|
(struct count_info __user *) arg); |
|
case SNDCTL_DSP_MAPINBUF: |
|
case SNDCTL_DSP_MAPOUTBUF: |
|
return snd_pcm_oss_get_mapbuf(pcm_oss_file, |
|
cmd == SNDCTL_DSP_MAPINBUF ? |
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
|
(struct buffmem_desc __user *) arg); |
|
case SNDCTL_DSP_SETSYNCRO: |
|
/* stop DMA now.. */ |
|
return 0; |
|
case SNDCTL_DSP_SETDUPLEX: |
|
if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) |
|
return 0; |
|
return -EIO; |
|
case SNDCTL_DSP_GETODELAY: |
|
res = snd_pcm_oss_get_odelay(pcm_oss_file); |
|
if (res < 0) { |
|
/* it's for sure, some broken apps don't check for error codes */ |
|
put_user(0, p); |
|
return res; |
|
} |
|
return put_user(res, p); |
|
case SNDCTL_DSP_PROFILE: |
|
return 0; /* silently ignore */ |
|
default: |
|
pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
#ifdef CONFIG_COMPAT |
|
/* all compatible */ |
|
static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, |
|
unsigned long arg) |
|
{ |
|
/* |
|
* Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF, |
|
* which are not implemented for the native case either |
|
*/ |
|
return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); |
|
} |
|
#else |
|
#define snd_pcm_oss_ioctl_compat NULL |
|
#endif |
|
|
|
static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) |
|
{ |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
struct snd_pcm_substream *substream; |
|
|
|
pcm_oss_file = file->private_data; |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
if (substream == NULL) |
|
return -ENXIO; |
|
substream->f_flags = file->f_flags & O_NONBLOCK; |
|
#ifndef OSS_DEBUG |
|
return snd_pcm_oss_read1(substream, buf, count); |
|
#else |
|
{ |
|
ssize_t res = snd_pcm_oss_read1(substream, buf, count); |
|
pcm_dbg(substream->pcm, |
|
"pcm_oss: read %li bytes (returned %li bytes)\n", |
|
(long)count, (long)res); |
|
return res; |
|
} |
|
#endif |
|
} |
|
|
|
static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) |
|
{ |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
struct snd_pcm_substream *substream; |
|
long result; |
|
|
|
pcm_oss_file = file->private_data; |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream == NULL) |
|
return -ENXIO; |
|
substream->f_flags = file->f_flags & O_NONBLOCK; |
|
result = snd_pcm_oss_write1(substream, buf, count); |
|
#ifdef OSS_DEBUG |
|
pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", |
|
(long)count, (long)result); |
|
#endif |
|
return result; |
|
} |
|
|
|
static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
if (atomic_read(&substream->mmap_count)) |
|
return runtime->oss.prev_hw_ptr_period != |
|
get_hw_ptr_period(runtime); |
|
else |
|
return snd_pcm_playback_avail(runtime) >= |
|
runtime->oss.period_frames; |
|
} |
|
|
|
static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) |
|
{ |
|
struct snd_pcm_runtime *runtime = substream->runtime; |
|
if (atomic_read(&substream->mmap_count)) |
|
return runtime->oss.prev_hw_ptr_period != |
|
get_hw_ptr_period(runtime); |
|
else |
|
return snd_pcm_capture_avail(runtime) >= |
|
runtime->oss.period_frames; |
|
} |
|
|
|
static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) |
|
{ |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
__poll_t mask; |
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; |
|
|
|
pcm_oss_file = file->private_data; |
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
|
|
mask = 0; |
|
if (psubstream != NULL) { |
|
struct snd_pcm_runtime *runtime = psubstream->runtime; |
|
poll_wait(file, &runtime->sleep, wait); |
|
snd_pcm_stream_lock_irq(psubstream); |
|
if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && |
|
(runtime->status->state != SNDRV_PCM_STATE_RUNNING || |
|
snd_pcm_oss_playback_ready(psubstream))) |
|
mask |= EPOLLOUT | EPOLLWRNORM; |
|
snd_pcm_stream_unlock_irq(psubstream); |
|
} |
|
if (csubstream != NULL) { |
|
struct snd_pcm_runtime *runtime = csubstream->runtime; |
|
snd_pcm_state_t ostate; |
|
poll_wait(file, &runtime->sleep, wait); |
|
snd_pcm_stream_lock_irq(csubstream); |
|
if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || |
|
snd_pcm_oss_capture_ready(csubstream)) |
|
mask |= EPOLLIN | EPOLLRDNORM; |
|
snd_pcm_stream_unlock_irq(csubstream); |
|
if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { |
|
struct snd_pcm_oss_file ofile; |
|
memset(&ofile, 0, sizeof(ofile)); |
|
ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
runtime->oss.trigger = 0; |
|
snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); |
|
} |
|
} |
|
|
|
return mask; |
|
} |
|
|
|
static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) |
|
{ |
|
struct snd_pcm_oss_file *pcm_oss_file; |
|
struct snd_pcm_substream *substream = NULL; |
|
struct snd_pcm_runtime *runtime; |
|
int err; |
|
|
|
#ifdef OSS_DEBUG |
|
pr_debug("pcm_oss: mmap begin\n"); |
|
#endif |
|
pcm_oss_file = file->private_data; |
|
switch ((area->vm_flags & (VM_READ | VM_WRITE))) { |
|
case VM_READ | VM_WRITE: |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
if (substream) |
|
break; |
|
fallthrough; |
|
case VM_READ: |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
|
break; |
|
case VM_WRITE: |
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
/* set VM_READ access as well to fix memset() routines that do |
|
reads before writes (to improve performance) */ |
|
area->vm_flags |= VM_READ; |
|
if (substream == NULL) |
|
return -ENXIO; |
|
runtime = substream->runtime; |
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) |
|
return -EIO; |
|
if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) |
|
runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; |
|
else |
|
return -EIO; |
|
|
|
if (runtime->oss.params) { |
|
/* use mutex_trylock() for params_lock for avoiding a deadlock |
|
* between mmap_lock and params_lock taken by |
|
* copy_from/to_user() in snd_pcm_oss_write/read() |
|
*/ |
|
err = snd_pcm_oss_change_params(substream, true); |
|
if (err < 0) |
|
return err; |
|
} |
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS |
|
if (runtime->oss.plugin_first != NULL) |
|
return -EIO; |
|
#endif |
|
|
|
if (area->vm_pgoff != 0) |
|
return -EINVAL; |
|
|
|
err = snd_pcm_mmap_data(substream, file, area); |
|
if (err < 0) |
|
return err; |
|
runtime->oss.mmap_bytes = area->vm_end - area->vm_start; |
|
runtime->silence_threshold = 0; |
|
runtime->silence_size = 0; |
|
#ifdef OSS_DEBUG |
|
pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", |
|
runtime->oss.mmap_bytes); |
|
#endif |
|
/* In mmap mode we never stop */ |
|
runtime->stop_threshold = runtime->boundary; |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS |
|
/* |
|
* /proc interface |
|
*/ |
|
|
|
static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, |
|
struct snd_info_buffer *buffer) |
|
{ |
|
struct snd_pcm_str *pstr = entry->private_data; |
|
struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; |
|
mutex_lock(&pstr->oss.setup_mutex); |
|
while (setup) { |
|
snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", |
|
setup->task_name, |
|
setup->periods, |
|
setup->period_size, |
|
setup->disable ? " disable" : "", |
|
setup->direct ? " direct" : "", |
|
setup->block ? " block" : "", |
|
setup->nonblock ? " non-block" : "", |
|
setup->partialfrag ? " partial-frag" : "", |
|
setup->nosilence ? " no-silence" : ""); |
|
setup = setup->next; |
|
} |
|
mutex_unlock(&pstr->oss.setup_mutex); |
|
} |
|
|
|
static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) |
|
{ |
|
struct snd_pcm_oss_setup *setup, *setupn; |
|
|
|
for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; |
|
setup; setup = setupn) { |
|
setupn = setup->next; |
|
kfree(setup->task_name); |
|
kfree(setup); |
|
} |
|
pstr->oss.setup_list = NULL; |
|
} |
|
|
|
static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, |
|
struct snd_info_buffer *buffer) |
|
{ |
|
struct snd_pcm_str *pstr = entry->private_data; |
|
char line[128], str[32], task_name[32]; |
|
const char *ptr; |
|
int idx1; |
|
struct snd_pcm_oss_setup *setup, *setup1, template; |
|
|
|
while (!snd_info_get_line(buffer, line, sizeof(line))) { |
|
mutex_lock(&pstr->oss.setup_mutex); |
|
memset(&template, 0, sizeof(template)); |
|
ptr = snd_info_get_str(task_name, line, sizeof(task_name)); |
|
if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { |
|
snd_pcm_oss_proc_free_setup_list(pstr); |
|
mutex_unlock(&pstr->oss.setup_mutex); |
|
continue; |
|
} |
|
for (setup = pstr->oss.setup_list; setup; setup = setup->next) { |
|
if (!strcmp(setup->task_name, task_name)) { |
|
template = *setup; |
|
break; |
|
} |
|
} |
|
ptr = snd_info_get_str(str, ptr, sizeof(str)); |
|
template.periods = simple_strtoul(str, NULL, 10); |
|
ptr = snd_info_get_str(str, ptr, sizeof(str)); |
|
template.period_size = simple_strtoul(str, NULL, 10); |
|
for (idx1 = 31; idx1 >= 0; idx1--) |
|
if (template.period_size & (1 << idx1)) |
|
break; |
|
for (idx1--; idx1 >= 0; idx1--) |
|
template.period_size &= ~(1 << idx1); |
|
do { |
|
ptr = snd_info_get_str(str, ptr, sizeof(str)); |
|
if (!strcmp(str, "disable")) { |
|
template.disable = 1; |
|
} else if (!strcmp(str, "direct")) { |
|
template.direct = 1; |
|
} else if (!strcmp(str, "block")) { |
|
template.block = 1; |
|
} else if (!strcmp(str, "non-block")) { |
|
template.nonblock = 1; |
|
} else if (!strcmp(str, "partial-frag")) { |
|
template.partialfrag = 1; |
|
} else if (!strcmp(str, "no-silence")) { |
|
template.nosilence = 1; |
|
} else if (!strcmp(str, "buggy-ptr")) { |
|
template.buggyptr = 1; |
|
} |
|
} while (*str); |
|
if (setup == NULL) { |
|
setup = kmalloc(sizeof(*setup), GFP_KERNEL); |
|
if (! setup) { |
|
buffer->error = -ENOMEM; |
|
mutex_unlock(&pstr->oss.setup_mutex); |
|
return; |
|
} |
|
if (pstr->oss.setup_list == NULL) |
|
pstr->oss.setup_list = setup; |
|
else { |
|
for (setup1 = pstr->oss.setup_list; |
|
setup1->next; setup1 = setup1->next); |
|
setup1->next = setup; |
|
} |
|
template.task_name = kstrdup(task_name, GFP_KERNEL); |
|
if (! template.task_name) { |
|
kfree(setup); |
|
buffer->error = -ENOMEM; |
|
mutex_unlock(&pstr->oss.setup_mutex); |
|
return; |
|
} |
|
} |
|
*setup = template; |
|
mutex_unlock(&pstr->oss.setup_mutex); |
|
} |
|
} |
|
|
|
static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) |
|
{ |
|
int stream; |
|
for (stream = 0; stream < 2; ++stream) { |
|
struct snd_info_entry *entry; |
|
struct snd_pcm_str *pstr = &pcm->streams[stream]; |
|
if (pstr->substream_count == 0) |
|
continue; |
|
if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { |
|
entry->content = SNDRV_INFO_CONTENT_TEXT; |
|
entry->mode = S_IFREG | 0644; |
|
entry->c.text.read = snd_pcm_oss_proc_read; |
|
entry->c.text.write = snd_pcm_oss_proc_write; |
|
entry->private_data = pstr; |
|
if (snd_info_register(entry) < 0) { |
|
snd_info_free_entry(entry); |
|
entry = NULL; |
|
} |
|
} |
|
pstr->oss.proc_entry = entry; |
|
} |
|
} |
|
|
|
static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) |
|
{ |
|
int stream; |
|
for (stream = 0; stream < 2; ++stream) { |
|
struct snd_pcm_str *pstr = &pcm->streams[stream]; |
|
snd_info_free_entry(pstr->oss.proc_entry); |
|
pstr->oss.proc_entry = NULL; |
|
snd_pcm_oss_proc_free_setup_list(pstr); |
|
} |
|
} |
|
#else /* !CONFIG_SND_VERBOSE_PROCFS */ |
|
#define snd_pcm_oss_proc_init(pcm) |
|
#define snd_pcm_oss_proc_done(pcm) |
|
#endif /* CONFIG_SND_VERBOSE_PROCFS */ |
|
|
|
/* |
|
* ENTRY functions |
|
*/ |
|
|
|
static const struct file_operations snd_pcm_oss_f_reg = |
|
{ |
|
.owner = THIS_MODULE, |
|
.read = snd_pcm_oss_read, |
|
.write = snd_pcm_oss_write, |
|
.open = snd_pcm_oss_open, |
|
.release = snd_pcm_oss_release, |
|
.llseek = no_llseek, |
|
.poll = snd_pcm_oss_poll, |
|
.unlocked_ioctl = snd_pcm_oss_ioctl, |
|
.compat_ioctl = snd_pcm_oss_ioctl_compat, |
|
.mmap = snd_pcm_oss_mmap, |
|
}; |
|
|
|
static void register_oss_dsp(struct snd_pcm *pcm, int index) |
|
{ |
|
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
|
pcm->card, index, &snd_pcm_oss_f_reg, |
|
pcm) < 0) { |
|
pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", |
|
pcm->card->number, pcm->device); |
|
} |
|
} |
|
|
|
static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) |
|
{ |
|
pcm->oss.reg = 0; |
|
if (dsp_map[pcm->card->number] == (int)pcm->device) { |
|
char name[128]; |
|
int duplex; |
|
register_oss_dsp(pcm, 0); |
|
duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && |
|
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && |
|
!(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); |
|
sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); |
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO |
|
snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, |
|
pcm->card->number, |
|
name); |
|
#endif |
|
pcm->oss.reg++; |
|
pcm->oss.reg_mask |= 1; |
|
} |
|
if (adsp_map[pcm->card->number] == (int)pcm->device) { |
|
register_oss_dsp(pcm, 1); |
|
pcm->oss.reg++; |
|
pcm->oss.reg_mask |= 2; |
|
} |
|
|
|
if (pcm->oss.reg) |
|
snd_pcm_oss_proc_init(pcm); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) |
|
{ |
|
if (pcm->oss.reg) { |
|
if (pcm->oss.reg_mask & 1) { |
|
pcm->oss.reg_mask &= ~1; |
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
|
pcm->card, 0); |
|
} |
|
if (pcm->oss.reg_mask & 2) { |
|
pcm->oss.reg_mask &= ~2; |
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
|
pcm->card, 1); |
|
} |
|
if (dsp_map[pcm->card->number] == (int)pcm->device) { |
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO |
|
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); |
|
#endif |
|
} |
|
pcm->oss.reg = 0; |
|
} |
|
return 0; |
|
} |
|
|
|
static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) |
|
{ |
|
snd_pcm_oss_disconnect_minor(pcm); |
|
snd_pcm_oss_proc_done(pcm); |
|
return 0; |
|
} |
|
|
|
static struct snd_pcm_notify snd_pcm_oss_notify = |
|
{ |
|
.n_register = snd_pcm_oss_register_minor, |
|
.n_disconnect = snd_pcm_oss_disconnect_minor, |
|
.n_unregister = snd_pcm_oss_unregister_minor, |
|
}; |
|
|
|
static int __init alsa_pcm_oss_init(void) |
|
{ |
|
int i; |
|
int err; |
|
|
|
/* check device map table */ |
|
for (i = 0; i < SNDRV_CARDS; i++) { |
|
if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { |
|
pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", |
|
i, dsp_map[i]); |
|
dsp_map[i] = 0; |
|
} |
|
if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { |
|
pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", |
|
i, adsp_map[i]); |
|
adsp_map[i] = 1; |
|
} |
|
} |
|
if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) |
|
return err; |
|
return 0; |
|
} |
|
|
|
static void __exit alsa_pcm_oss_exit(void) |
|
{ |
|
snd_pcm_notify(&snd_pcm_oss_notify, 1); |
|
} |
|
|
|
module_init(alsa_pcm_oss_init) |
|
module_exit(alsa_pcm_oss_exit)
|
|
|