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436 lines
15 KiB
436 lines
15 KiB
/* |
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Copyright (c) 2012, Broadcom Europe Ltd |
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All rights reserved. |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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* Neither the name of the copyright holder nor the |
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names of its contributors may be used to endorse or promote products |
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derived from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <stdlib.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include "containers/core/containers_private.h" |
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#include "containers/core/containers_loader.h" |
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#if !defined(ENABLE_CONTAINERS_STANDALONE) |
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#include "vcos_dlfcn.h" |
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#define DL_SUFFIX VCOS_SO_EXT |
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#ifndef DL_PATH_PREFIX |
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#define DL_PATH_PREFIX "" |
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#endif |
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#endif |
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/****************************************************************************** |
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Type definitions. |
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******************************************************************************/ |
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typedef VC_CONTAINER_STATUS_T (*VC_CONTAINER_READER_OPEN_FUNC_T)(VC_CONTAINER_T *); |
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typedef VC_CONTAINER_STATUS_T (*VC_CONTAINER_WRITER_OPEN_FUNC_T)(VC_CONTAINER_T *); |
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/****************************************************************************** |
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Prototypes for local functions |
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******************************************************************************/ |
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static void reset_context(VC_CONTAINER_T *p_ctx); |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_library(void **handle, const char *name, const char *ext, int read); |
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static void unload_library(void *handle); |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_reader(void **handle, const char *name); |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_writer(void **handle, const char *name); |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_metadata_reader(void **handle, const char *name); |
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static const char* container_for_fileext(const char *fileext); |
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/******************************************************************************** |
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List of supported containers |
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********************************************************************************/ |
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static const char *readers[] = |
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{"mp4", "asf", "avi", "mkv", "wav", "flv", "simple", "rawvideo", "mpga", "ps", "rtp", "rtsp", "rcv", "rv9", "qsynth", "binary", 0}; |
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static const char *writers[] = |
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{"mp4", "asf", "avi", "binary", "simple", "rawvideo", 0}; |
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static const char *metadata_readers[] = |
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{"id3", 0}; |
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#if defined(ENABLE_CONTAINERS_STANDALONE) |
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VC_CONTAINER_STATUS_T asf_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T avi_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T avi_writer_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T mp4_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T mp4_writer_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T mpga_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T mkv_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T wav_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T flv_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T ps_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rtp_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rtsp_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T binary_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T binary_writer_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rcv_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rv9_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T qsynth_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T simple_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T simple_writer_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rawvideo_reader_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T rawvideo_writer_open( VC_CONTAINER_T * ); |
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VC_CONTAINER_STATUS_T id3_metadata_reader_open( VC_CONTAINER_T * ); |
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static struct |
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{ |
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const char *name; |
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VC_CONTAINER_READER_OPEN_FUNC_T func; |
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} reader_entry_points[] = |
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{ |
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{"asf", &asf_reader_open}, |
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{"avi", &avi_reader_open}, |
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{"mpga", &mpga_reader_open}, |
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{"mkv", &mkv_reader_open}, |
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{"wav", &wav_reader_open}, |
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{"mp4", &mp4_reader_open}, |
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{"flv", &flv_reader_open}, |
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{"ps", &ps_reader_open}, |
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{"binary", &binary_reader_open}, |
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{"rtp", &rtp_reader_open}, |
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{"rtsp", &rtsp_reader_open}, |
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{"rcv", &rcv_reader_open}, |
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{"rv9", &rv9_reader_open}, |
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{"qsynth", &qsynth_reader_open}, |
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{"simple", &simple_reader_open}, |
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{"rawvideo", &rawvideo_reader_open}, |
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{0, 0} |
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}; |
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static struct |
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{ |
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const char *name; |
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VC_CONTAINER_READER_OPEN_FUNC_T func; |
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} metadata_reader_entry_points[] = |
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{ |
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{"id3", &id3_metadata_reader_open}, |
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{0, 0} |
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}; |
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static struct |
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{ |
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const char *name; |
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VC_CONTAINER_WRITER_OPEN_FUNC_T func; |
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} writer_entry_points[] = |
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{ |
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{"avi", &avi_writer_open}, |
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{"mp4", &mp4_writer_open}, |
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{"binary", &binary_writer_open}, |
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{"simple", &simple_writer_open}, |
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{"rawvideo", &rawvideo_writer_open}, |
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{0, 0} |
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}; |
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#endif /* defined(ENABLE_CONTAINERS_STANDALONE) */ |
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/** Table describing the mapping between file extensions and container name. |
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This is only used as optimisation to decide which container to try first. |
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Entries where the file extension and container have the same name can be omitted. */ |
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static const struct { |
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const char *extension; |
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const char *container; |
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} extension_container_mapping[] = |
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{ |
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{ "wma", "asf" }, |
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{ "wmv", "asf" }, |
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{ "mov", "mp4" }, |
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{ "3gp", "mp4" }, |
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{ "mp2", "mpga" }, |
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{ "mp3", "mpga" }, |
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{ "webm", "mkv" }, |
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{ "mid", "qsynth" }, |
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{ "mld", "qsynth" }, |
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{ "mmf", "qsynth" }, |
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{ 0, 0 } |
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}; |
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/******************************************************************************** |
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Public functions |
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********************************************************************************/ |
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VC_CONTAINER_STATUS_T vc_container_load_reader(VC_CONTAINER_T *p_ctx, const char *fileext) |
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{ |
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const char *name; |
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void *handle = NULL; |
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VC_CONTAINER_READER_OPEN_FUNC_T func; |
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VC_CONTAINER_STATUS_T status; |
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unsigned int i; |
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int64_t offset; |
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vc_container_assert(p_ctx && !p_ctx->priv->module_handle); |
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/* FIXME: the missing part here is code that reads a configuration or |
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searches the filesystem for container libraries. Instead, we currently |
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rely on static arrays i.e. 'readers', 'writers', etc. */ |
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/* Before trying proper container readers, iterate through metadata |
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readers to parse tags concatenated to start/end of stream */ |
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for(i = 0; metadata_readers[i]; i++) |
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{ |
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if ((func = load_metadata_reader(&handle, metadata_readers[i])) != NULL) |
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{ |
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status = (*func)(p_ctx); |
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if(!status && p_ctx->priv->pf_close) p_ctx->priv->pf_close(p_ctx); |
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reset_context(p_ctx); |
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unload_library(handle); |
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if(status == VC_CONTAINER_SUCCESS) break; |
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if (status != VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED) goto error; |
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} |
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} |
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/* Store the current position, in case any containers don't leave the stream |
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at the start, and the IO layer can cope with the seek */ |
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offset = p_ctx->priv->io->offset; |
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/* Now move to containers, try to find a readers using the file extension to name |
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mapping first */ |
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if (fileext && (name = container_for_fileext(fileext)) != NULL && (func = load_reader(&handle, name)) != NULL) |
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{ |
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status = (*func)(p_ctx); |
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if(status == VC_CONTAINER_SUCCESS) goto success; |
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unload_library(handle); |
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if (status != VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED) goto error; |
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} |
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/* If there was no suitable mapping, iterate through all readers. */ |
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for(i = 0; readers[i]; i++) |
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{ |
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if ((func = load_reader(&handle, readers[i])) != NULL) |
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{ |
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if(vc_container_io_seek(p_ctx->priv->io, offset) != VC_CONTAINER_SUCCESS) |
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{ |
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unload_library(handle); |
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goto error; |
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} |
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status = (*func)(p_ctx); |
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if(status == VC_CONTAINER_SUCCESS) goto success; |
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reset_context(p_ctx); |
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unload_library(handle); |
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if (status != VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED) goto error; |
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} |
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} |
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error: |
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return VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED; |
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success: |
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p_ctx->priv->module_handle = handle; |
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return VC_CONTAINER_SUCCESS; |
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} |
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/*****************************************************************************/ |
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VC_CONTAINER_STATUS_T vc_container_load_writer(VC_CONTAINER_T *p_ctx, const char *fileext) |
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{ |
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const char *name; |
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void *handle = NULL; |
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VC_CONTAINER_WRITER_OPEN_FUNC_T func; |
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VC_CONTAINER_STATUS_T status = VC_CONTAINER_ERROR_FAILED; |
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unsigned int i; |
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vc_container_assert(p_ctx && !p_ctx->priv->module_handle); |
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/* Do we have a container mapping for this file extension? */ |
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if ((name = container_for_fileext(fileext)) != NULL && (func = load_writer(&handle, name)) != NULL) |
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{ |
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status = (*func)(p_ctx); |
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if(status == VC_CONTAINER_SUCCESS) goto success; |
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unload_library(handle); |
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if (status != VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED) goto error; |
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} |
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/* If there was no suitable mapping, iterate through all writers. */ |
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for(i = 0; writers[i]; i++) |
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{ |
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if ((func = load_writer(&handle, writers[i])) != NULL) |
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{ |
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status = (*func)(p_ctx); |
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if(status == VC_CONTAINER_SUCCESS) goto success; |
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unload_library(handle); |
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if (status != VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED) goto error; |
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} |
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} |
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error: |
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return VC_CONTAINER_ERROR_FORMAT_NOT_SUPPORTED; |
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success: |
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p_ctx->priv->module_handle = handle; |
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return status; |
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} |
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/*****************************************************************************/ |
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void vc_container_unload(VC_CONTAINER_T *p_ctx) |
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{ |
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if (p_ctx->priv->module_handle) |
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{ |
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unload_library(p_ctx->priv->module_handle); |
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p_ctx->priv->module_handle = NULL; |
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} |
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} |
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/****************************************************************************** |
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Local Functions |
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******************************************************************************/ |
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static void reset_context(VC_CONTAINER_T *p_ctx) |
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{ |
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vc_container_assert(p_ctx); |
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p_ctx->capabilities = 0; |
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p_ctx->tracks = NULL; |
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p_ctx->tracks_num = 0; |
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p_ctx->drm = NULL; |
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p_ctx->priv->module = NULL; |
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p_ctx->priv->pf_close = NULL; |
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p_ctx->priv->pf_read = NULL; |
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p_ctx->priv->pf_write = NULL; |
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p_ctx->priv->pf_seek = NULL; |
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p_ctx->priv->pf_control = NULL; |
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p_ctx->priv->tmp_io = NULL; |
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} |
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/*****************************************************************************/ |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_reader(void **handle, const char *name) |
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{ |
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return load_library(handle, name, NULL, 1); |
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} |
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/*****************************************************************************/ |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_writer(void **handle, const char *name) |
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{ |
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return load_library(handle, name, NULL, 0); |
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} |
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/*****************************************************************************/ |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_metadata_reader(void **handle, const char *name) |
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{ |
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#define DL_PREFIX_METADATA "metadata_" |
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return load_library(handle, name, DL_PREFIX_METADATA, 1); |
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} |
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#if !defined(ENABLE_CONTAINERS_STANDALONE) |
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/*****************************************************************************/ |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_library(void **handle, const char *name, const char *ext, int read) |
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{ |
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#define DL_PREFIX_RD "reader_" |
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#define DL_PREFIX_WR "writer_" |
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const char *entrypt_read = {"reader_open"}; |
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const char *entrypt_write = {"writer_open"}; |
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char *dl_name, *entrypt_name; |
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void *dl_handle; |
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VC_CONTAINER_READER_OPEN_FUNC_T func = NULL; |
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unsigned dl_size, ep_size, name_len = strlen(name) + (ext ? strlen(ext) : 0); |
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vc_container_assert(read == 0 || read == 1); |
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dl_size = strlen(DL_PATH_PREFIX) + MAX(strlen(DL_PREFIX_RD), strlen(DL_PREFIX_WR)) + name_len + strlen(DL_SUFFIX) + 1; |
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if ((dl_name = malloc(dl_size)) == NULL) |
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return NULL; |
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ep_size = name_len + 1 + MAX(strlen(entrypt_read), strlen(entrypt_write)) + 1; |
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if ((entrypt_name = malloc(ep_size)) == NULL) |
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{ |
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free(dl_name); |
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return NULL; |
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} |
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snprintf(dl_name, dl_size, "%s%s%s%s%s", DL_PATH_PREFIX, read ? DL_PREFIX_RD : DL_PREFIX_WR, ext ? ext : "", name, DL_SUFFIX); |
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snprintf(entrypt_name, ep_size, "%s_%s%s", name, ext ? ext : "", read ? entrypt_read : entrypt_write); |
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if ( (dl_handle = vcos_dlopen(dl_name, VCOS_DL_NOW)) != NULL ) |
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{ |
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/* Try generic entrypoint name before the mangled, full name */ |
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func = (VC_CONTAINER_READER_OPEN_FUNC_T)vcos_dlsym(dl_handle, read ? entrypt_read : entrypt_write); |
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#if !defined(__VIDEOCORE__) /* The following would be pointless on MW/VideoCore */ |
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if (!func) func = (VC_CONTAINER_READER_OPEN_FUNC_T)vcos_dlsym(dl_handle, entrypt_name); |
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#endif |
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/* Only return handle if symbol found */ |
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if (func) |
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*handle = dl_handle; |
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else |
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vcos_dlclose(dl_handle); |
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} |
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free(entrypt_name); |
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free(dl_name); |
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return func; |
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} |
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/*****************************************************************************/ |
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static void unload_library(void *handle) |
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{ |
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vcos_dlclose(handle); |
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} |
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#else /* !defined(ENABLE_CONTAINERS_STANDALONE) */ |
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/*****************************************************************************/ |
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static VC_CONTAINER_READER_OPEN_FUNC_T load_library(void **handle, const char *name, const char *ext, int read) |
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{ |
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int i; |
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VC_CONTAINER_PARAM_UNUSED(handle); |
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VC_CONTAINER_PARAM_UNUSED(ext); |
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if (read) |
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{ |
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for (i = 0; reader_entry_points[i].name; i++) |
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if (!strcasecmp(reader_entry_points[i].name, name)) |
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return reader_entry_points[i].func; |
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for (i = 0; metadata_reader_entry_points[i].name; i++) |
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if (!strcasecmp(metadata_reader_entry_points[i].name, name)) |
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return metadata_reader_entry_points[i].func; |
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} |
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else |
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{ |
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for (i = 0; writer_entry_points[i].name; i++) |
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if (!strcasecmp(writer_entry_points[i].name, name)) |
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return writer_entry_points[i].func; |
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} |
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return NULL; |
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} |
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/*****************************************************************************/ |
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static void unload_library(void *handle) |
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{ |
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(void)handle; |
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} |
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#endif /* !defined(ENABLE_CONTAINERS_STANDALONE) */ |
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/*****************************************************************************/ |
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static const char* container_for_fileext(const char *fileext) |
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{ |
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int i; |
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for( i = 0; fileext && extension_container_mapping[i].extension; i++ ) |
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{ |
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if (!strcasecmp( fileext, extension_container_mapping[i].extension )) |
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return extension_container_mapping[i].container; |
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} |
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return fileext; |
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}
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