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874 lines
28 KiB
874 lines
28 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Memory-to-memory device framework for Video for Linux 2. |
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* |
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* Helper functions for devices that use memory buffers for both source |
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* and destination. |
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* |
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* Copyright (c) 2009 Samsung Electronics Co., Ltd. |
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* Pawel Osciak, <[email protected]> |
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* Marek Szyprowski, <[email protected]> |
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*/ |
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#ifndef _MEDIA_V4L2_MEM2MEM_H |
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#define _MEDIA_V4L2_MEM2MEM_H |
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#include <media/videobuf2-v4l2.h> |
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/** |
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* struct v4l2_m2m_ops - mem-to-mem device driver callbacks |
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* @device_run: required. Begin the actual job (transaction) inside this |
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* callback. |
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* The job does NOT have to end before this callback returns |
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* (and it will be the usual case). When the job finishes, |
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* v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() |
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* has to be called. |
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* @job_ready: optional. Should return 0 if the driver does not have a job |
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* fully prepared to run yet (i.e. it will not be able to finish a |
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* transaction without sleeping). If not provided, it will be |
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* assumed that one source and one destination buffer are all |
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* that is required for the driver to perform one full transaction. |
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* This method may not sleep. |
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* @job_abort: optional. Informs the driver that it has to abort the currently |
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* running transaction as soon as possible (i.e. as soon as it can |
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* stop the device safely; e.g. in the next interrupt handler), |
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* even if the transaction would not have been finished by then. |
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* After the driver performs the necessary steps, it has to call |
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* v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() as |
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* if the transaction ended normally. |
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* This function does not have to (and will usually not) wait |
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* until the device enters a state when it can be stopped. |
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*/ |
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struct v4l2_m2m_ops { |
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void (*device_run)(void *priv); |
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int (*job_ready)(void *priv); |
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void (*job_abort)(void *priv); |
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}; |
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struct video_device; |
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struct v4l2_m2m_dev; |
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/** |
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* struct v4l2_m2m_queue_ctx - represents a queue for buffers ready to be |
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* processed |
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* |
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* @q: pointer to struct &vb2_queue |
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* @rdy_queue: List of V4L2 mem-to-mem queues |
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* @rdy_spinlock: spin lock to protect the struct usage |
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* @num_rdy: number of buffers ready to be processed |
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* @buffered: is the queue buffered? |
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* |
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* Queue for buffers ready to be processed as soon as this |
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* instance receives access to the device. |
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*/ |
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struct v4l2_m2m_queue_ctx { |
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struct vb2_queue q; |
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struct list_head rdy_queue; |
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spinlock_t rdy_spinlock; |
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u8 num_rdy; |
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bool buffered; |
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}; |
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/** |
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* struct v4l2_m2m_ctx - Memory to memory context structure |
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* |
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* @q_lock: struct &mutex lock |
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* @new_frame: valid in the device_run callback: if true, then this |
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* starts a new frame; if false, then this is a new slice |
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* for an existing frame. This is always true unless |
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* V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF is set, which |
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* indicates slicing support. |
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* @is_draining: indicates device is in draining phase |
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* @last_src_buf: indicate the last source buffer for draining |
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* @next_buf_last: next capture queud buffer will be tagged as last |
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* @has_stopped: indicate the device has been stopped |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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* @cap_q_ctx: Capture (output to memory) queue context |
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* @out_q_ctx: Output (input from memory) queue context |
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* @queue: List of memory to memory contexts |
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* @job_flags: Job queue flags, used internally by v4l2-mem2mem.c: |
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* %TRANS_QUEUED, %TRANS_RUNNING and %TRANS_ABORT. |
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* @finished: Wait queue used to signalize when a job queue finished. |
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* @priv: Instance private data |
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* |
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* The memory to memory context is specific to a file handle, NOT to e.g. |
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* a device. |
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*/ |
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struct v4l2_m2m_ctx { |
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/* optional cap/out vb2 queues lock */ |
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struct mutex *q_lock; |
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bool new_frame; |
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bool is_draining; |
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struct vb2_v4l2_buffer *last_src_buf; |
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bool next_buf_last; |
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bool has_stopped; |
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/* internal use only */ |
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struct v4l2_m2m_dev *m2m_dev; |
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struct v4l2_m2m_queue_ctx cap_q_ctx; |
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struct v4l2_m2m_queue_ctx out_q_ctx; |
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/* For device job queue */ |
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struct list_head queue; |
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unsigned long job_flags; |
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wait_queue_head_t finished; |
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void *priv; |
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}; |
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/** |
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* struct v4l2_m2m_buffer - Memory to memory buffer |
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* |
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* @vb: pointer to struct &vb2_v4l2_buffer |
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* @list: list of m2m buffers |
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*/ |
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struct v4l2_m2m_buffer { |
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struct vb2_v4l2_buffer vb; |
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struct list_head list; |
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}; |
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/** |
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* v4l2_m2m_get_curr_priv() - return driver private data for the currently |
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* running instance or NULL if no instance is running |
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* |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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*/ |
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void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev); |
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/** |
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* v4l2_m2m_get_vq() - return vb2_queue for the given type |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type |
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*/ |
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struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, |
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enum v4l2_buf_type type); |
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/** |
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* v4l2_m2m_try_schedule() - check whether an instance is ready to be added to |
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* the pending job queue and add it if so. |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* |
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* There are three basic requirements an instance has to meet to be able to run: |
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* 1) at least one source buffer has to be queued, |
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* 2) at least one destination buffer has to be queued, |
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* 3) streaming has to be on. |
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* |
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* If a queue is buffered (for example a decoder hardware ringbuffer that has |
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* to be drained before doing streamoff), allow scheduling without v4l2 buffers |
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* on that queue. |
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* |
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* There may also be additional, custom requirements. In such case the driver |
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* should supply a custom callback (job_ready in v4l2_m2m_ops) that should |
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* return 1 if the instance is ready. |
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* An example of the above could be an instance that requires more than one |
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* src/dst buffer per transaction. |
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*/ |
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void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx); |
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/** |
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* v4l2_m2m_job_finish() - inform the framework that a job has been finished |
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* and have it clean up |
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* |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* |
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* Called by a driver to yield back the device after it has finished with it. |
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* Should be called as soon as possible after reaching a state which allows |
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* other instances to take control of the device. |
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* |
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* This function has to be called only after &v4l2_m2m_ops->device_run |
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* callback has been called on the driver. To prevent recursion, it should |
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* not be called directly from the &v4l2_m2m_ops->device_run callback though. |
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*/ |
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void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, |
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struct v4l2_m2m_ctx *m2m_ctx); |
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/** |
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* v4l2_m2m_buf_done_and_job_finish() - return source/destination buffers with |
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* state and inform the framework that a job has been finished and have it |
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* clean up |
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* |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @state: vb2 buffer state passed to v4l2_m2m_buf_done(). |
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* |
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* Drivers that set V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF must use this |
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* function instead of job_finish() to take held buffers into account. It is |
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* optional for other drivers. |
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* |
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* This function removes the source buffer from the ready list and returns |
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* it with the given state. The same is done for the destination buffer, unless |
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* it is marked 'held'. In that case the buffer is kept on the ready list. |
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* |
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* After that the job is finished (see job_finish()). |
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* |
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* This allows for multiple output buffers to be used to fill in a single |
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* capture buffer. This is typically used by stateless decoders where |
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* multiple e.g. H.264 slices contribute to a single decoded frame. |
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*/ |
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void v4l2_m2m_buf_done_and_job_finish(struct v4l2_m2m_dev *m2m_dev, |
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struct v4l2_m2m_ctx *m2m_ctx, |
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enum vb2_buffer_state state); |
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static inline void |
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v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state) |
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{ |
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vb2_buffer_done(&buf->vb2_buf, state); |
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} |
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/** |
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* v4l2_m2m_clear_state() - clear encoding/decoding state |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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*/ |
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static inline void |
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v4l2_m2m_clear_state(struct v4l2_m2m_ctx *m2m_ctx) |
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{ |
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m2m_ctx->next_buf_last = false; |
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m2m_ctx->is_draining = false; |
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m2m_ctx->has_stopped = false; |
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} |
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/** |
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* v4l2_m2m_mark_stopped() - set current encoding/decoding state as stopped |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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*/ |
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static inline void |
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v4l2_m2m_mark_stopped(struct v4l2_m2m_ctx *m2m_ctx) |
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{ |
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m2m_ctx->next_buf_last = false; |
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m2m_ctx->is_draining = false; |
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m2m_ctx->has_stopped = true; |
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} |
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/** |
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* v4l2_m2m_dst_buf_is_last() - return the current encoding/decoding session |
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* draining management state of next queued capture buffer |
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* |
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* This last capture buffer should be tagged with V4L2_BUF_FLAG_LAST to notify |
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* the end of the capture session. |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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*/ |
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static inline bool |
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v4l2_m2m_dst_buf_is_last(struct v4l2_m2m_ctx *m2m_ctx) |
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{ |
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return m2m_ctx->is_draining && m2m_ctx->next_buf_last; |
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} |
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/** |
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* v4l2_m2m_has_stopped() - return the current encoding/decoding session |
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* stopped state |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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*/ |
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static inline bool |
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v4l2_m2m_has_stopped(struct v4l2_m2m_ctx *m2m_ctx) |
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{ |
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return m2m_ctx->has_stopped; |
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} |
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/** |
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* v4l2_m2m_is_last_draining_src_buf() - return the output buffer draining |
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* state in the current encoding/decoding session |
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* |
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* This will identify the last output buffer queued before a session stop |
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* was required, leading to an actual encoding/decoding session stop state |
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* in the encoding/decoding process after being processed. |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @vbuf: pointer to struct &v4l2_buffer |
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*/ |
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static inline bool |
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v4l2_m2m_is_last_draining_src_buf(struct v4l2_m2m_ctx *m2m_ctx, |
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struct vb2_v4l2_buffer *vbuf) |
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{ |
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return m2m_ctx->is_draining && vbuf == m2m_ctx->last_src_buf; |
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} |
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/** |
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* v4l2_m2m_last_buffer_done() - marks the buffer with LAST flag and DONE |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @vbuf: pointer to struct &v4l2_buffer |
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*/ |
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void v4l2_m2m_last_buffer_done(struct v4l2_m2m_ctx *m2m_ctx, |
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struct vb2_v4l2_buffer *vbuf); |
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/** |
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* v4l2_m2m_suspend() - stop new jobs from being run and wait for current job |
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* to finish |
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* |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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* |
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* Called by a driver in the suspend hook. Stop new jobs from being run, and |
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* wait for current running job to finish. |
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*/ |
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void v4l2_m2m_suspend(struct v4l2_m2m_dev *m2m_dev); |
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/** |
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* v4l2_m2m_resume() - resume job running and try to run a queued job |
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* |
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* @m2m_dev: opaque pointer to the internal data to handle M2M context |
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* |
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* Called by a driver in the resume hook. This reverts the operation of |
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* v4l2_m2m_suspend() and allows job to be run. Also try to run a queued job if |
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* there is any. |
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*/ |
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void v4l2_m2m_resume(struct v4l2_m2m_dev *m2m_dev); |
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/** |
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* v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @reqbufs: pointer to struct &v4l2_requestbuffers |
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*/ |
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int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_requestbuffers *reqbufs); |
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/** |
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* v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @buf: pointer to struct &v4l2_buffer |
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* |
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* See v4l2_m2m_mmap() documentation for details. |
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*/ |
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int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_buffer *buf); |
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/** |
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* v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on |
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* the type |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @buf: pointer to struct &v4l2_buffer |
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*/ |
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int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_buffer *buf); |
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/** |
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* v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on |
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* the type |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @buf: pointer to struct &v4l2_buffer |
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*/ |
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int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_buffer *buf); |
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/** |
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* v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on |
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* the type |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @buf: pointer to struct &v4l2_buffer |
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*/ |
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int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_buffer *buf); |
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/** |
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* v4l2_m2m_create_bufs() - create a source or destination buffer, depending |
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* on the type |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @create: pointer to struct &v4l2_create_buffers |
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*/ |
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int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_create_buffers *create); |
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/** |
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* v4l2_m2m_expbuf() - export a source or destination buffer, depending on |
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* the type |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @eb: pointer to struct &v4l2_exportbuffer |
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*/ |
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int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_exportbuffer *eb); |
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/** |
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* v4l2_m2m_streamon() - turn on streaming for a video queue |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type |
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*/ |
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int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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enum v4l2_buf_type type); |
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/** |
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* v4l2_m2m_streamoff() - turn off streaming for a video queue |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type |
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*/ |
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int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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enum v4l2_buf_type type); |
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|
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/** |
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* v4l2_m2m_update_start_streaming_state() - update the encoding/decoding |
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* session state when a start of streaming of a video queue is requested |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @q: queue |
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*/ |
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void v4l2_m2m_update_start_streaming_state(struct v4l2_m2m_ctx *m2m_ctx, |
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struct vb2_queue *q); |
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|
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/** |
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* v4l2_m2m_update_stop_streaming_state() - update the encoding/decoding |
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* session state when a stop of streaming of a video queue is requested |
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* |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @q: queue |
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*/ |
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void v4l2_m2m_update_stop_streaming_state(struct v4l2_m2m_ctx *m2m_ctx, |
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struct vb2_queue *q); |
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/** |
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* v4l2_m2m_encoder_cmd() - execute an encoder command |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @ec: pointer to the encoder command |
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*/ |
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int v4l2_m2m_encoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_encoder_cmd *ec); |
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|
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/** |
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* v4l2_m2m_decoder_cmd() - execute a decoder command |
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* |
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* @file: pointer to struct &file |
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* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
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* @dc: pointer to the decoder command |
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*/ |
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int v4l2_m2m_decoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
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struct v4l2_decoder_cmd *dc); |
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/** |
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* v4l2_m2m_poll() - poll replacement, for destination buffers only |
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* |
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* @file: pointer to struct &file |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @wait: pointer to struct &poll_table_struct |
|
* |
|
* Call from the driver's poll() function. Will poll both queues. If a buffer |
|
* is available to dequeue (with dqbuf) from the source queue, this will |
|
* indicate that a non-blocking write can be performed, while read will be |
|
* returned in case of the destination queue. |
|
*/ |
|
__poll_t v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
|
struct poll_table_struct *wait); |
|
|
|
/** |
|
* v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer |
|
* |
|
* @file: pointer to struct &file |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @vma: pointer to struct &vm_area_struct |
|
* |
|
* Call from driver's mmap() function. Will handle mmap() for both queues |
|
* seamlessly for videobuffer, which will receive normal per-queue offsets and |
|
* proper videobuf queue pointers. The differentiation is made outside videobuf |
|
* by adding a predefined offset to buffers from one of the queues and |
|
* subtracting it before passing it back to videobuf. Only drivers (and |
|
* thus applications) receive modified offsets. |
|
*/ |
|
int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, |
|
struct vm_area_struct *vma); |
|
|
|
/** |
|
* v4l2_m2m_init() - initialize per-driver m2m data |
|
* |
|
* @m2m_ops: pointer to struct v4l2_m2m_ops |
|
* |
|
* Usually called from driver's ``probe()`` function. |
|
* |
|
* Return: returns an opaque pointer to the internal data to handle M2M context |
|
*/ |
|
struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops); |
|
|
|
#if defined(CONFIG_MEDIA_CONTROLLER) |
|
void v4l2_m2m_unregister_media_controller(struct v4l2_m2m_dev *m2m_dev); |
|
int v4l2_m2m_register_media_controller(struct v4l2_m2m_dev *m2m_dev, |
|
struct video_device *vdev, int function); |
|
#else |
|
static inline void |
|
v4l2_m2m_unregister_media_controller(struct v4l2_m2m_dev *m2m_dev) |
|
{ |
|
} |
|
|
|
static inline int |
|
v4l2_m2m_register_media_controller(struct v4l2_m2m_dev *m2m_dev, |
|
struct video_device *vdev, int function) |
|
{ |
|
return 0; |
|
} |
|
#endif |
|
|
|
/** |
|
* v4l2_m2m_release() - cleans up and frees a m2m_dev structure |
|
* |
|
* @m2m_dev: opaque pointer to the internal data to handle M2M context |
|
* |
|
* Usually called from driver's ``remove()`` function. |
|
*/ |
|
void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev); |
|
|
|
/** |
|
* v4l2_m2m_ctx_init() - allocate and initialize a m2m context |
|
* |
|
* @m2m_dev: opaque pointer to the internal data to handle M2M context |
|
* @drv_priv: driver's instance private data |
|
* @queue_init: a callback for queue type-specific initialization function |
|
* to be used for initializing videobuf_queues |
|
* |
|
* Usually called from driver's ``open()`` function. |
|
*/ |
|
struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev, |
|
void *drv_priv, |
|
int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)); |
|
|
|
static inline void v4l2_m2m_set_src_buffered(struct v4l2_m2m_ctx *m2m_ctx, |
|
bool buffered) |
|
{ |
|
m2m_ctx->out_q_ctx.buffered = buffered; |
|
} |
|
|
|
static inline void v4l2_m2m_set_dst_buffered(struct v4l2_m2m_ctx *m2m_ctx, |
|
bool buffered) |
|
{ |
|
m2m_ctx->cap_q_ctx.buffered = buffered; |
|
} |
|
|
|
/** |
|
* v4l2_m2m_ctx_release() - release m2m context |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* |
|
* Usually called from driver's release() function. |
|
*/ |
|
void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx); |
|
|
|
/** |
|
* v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list. |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @vbuf: pointer to struct &vb2_v4l2_buffer |
|
* |
|
* Call from videobuf_queue_ops->ops->buf_queue, videobuf_queue_ops callback. |
|
*/ |
|
void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, |
|
struct vb2_v4l2_buffer *vbuf); |
|
|
|
/** |
|
* v4l2_m2m_num_src_bufs_ready() - return the number of source buffers ready for |
|
* use |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline |
|
unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return m2m_ctx->out_q_ctx.num_rdy; |
|
} |
|
|
|
/** |
|
* v4l2_m2m_num_dst_bufs_ready() - return the number of destination buffers |
|
* ready for use |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline |
|
unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return m2m_ctx->cap_q_ctx.num_rdy; |
|
} |
|
|
|
/** |
|
* v4l2_m2m_next_buf() - return next buffer from the list of ready buffers |
|
* |
|
* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx |
|
*/ |
|
struct vb2_v4l2_buffer *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx); |
|
|
|
/** |
|
* v4l2_m2m_next_src_buf() - return next source buffer from the list of ready |
|
* buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_next_src_buf(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_next_buf(&m2m_ctx->out_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_next_dst_buf() - return next destination buffer from the list of |
|
* ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_next_buf(&m2m_ctx->cap_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_last_buf() - return last buffer from the list of ready buffers |
|
* |
|
* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx |
|
*/ |
|
struct vb2_v4l2_buffer *v4l2_m2m_last_buf(struct v4l2_m2m_queue_ctx *q_ctx); |
|
|
|
/** |
|
* v4l2_m2m_last_src_buf() - return last destination buffer from the list of |
|
* ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_last_src_buf(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_last_buf(&m2m_ctx->out_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_last_dst_buf() - return last destination buffer from the list of |
|
* ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_last_dst_buf(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_last_buf(&m2m_ctx->cap_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_for_each_dst_buf() - iterate over a list of destination ready |
|
* buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @b: current buffer of type struct v4l2_m2m_buffer |
|
*/ |
|
#define v4l2_m2m_for_each_dst_buf(m2m_ctx, b) \ |
|
list_for_each_entry(b, &m2m_ctx->cap_q_ctx.rdy_queue, list) |
|
|
|
/** |
|
* v4l2_m2m_for_each_src_buf() - iterate over a list of source ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @b: current buffer of type struct v4l2_m2m_buffer |
|
*/ |
|
#define v4l2_m2m_for_each_src_buf(m2m_ctx, b) \ |
|
list_for_each_entry(b, &m2m_ctx->out_q_ctx.rdy_queue, list) |
|
|
|
/** |
|
* v4l2_m2m_for_each_dst_buf_safe() - iterate over a list of destination ready |
|
* buffers safely |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @b: current buffer of type struct v4l2_m2m_buffer |
|
* @n: used as temporary storage |
|
*/ |
|
#define v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, b, n) \ |
|
list_for_each_entry_safe(b, n, &m2m_ctx->cap_q_ctx.rdy_queue, list) |
|
|
|
/** |
|
* v4l2_m2m_for_each_src_buf_safe() - iterate over a list of source ready |
|
* buffers safely |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @b: current buffer of type struct v4l2_m2m_buffer |
|
* @n: used as temporary storage |
|
*/ |
|
#define v4l2_m2m_for_each_src_buf_safe(m2m_ctx, b, n) \ |
|
list_for_each_entry_safe(b, n, &m2m_ctx->out_q_ctx.rdy_queue, list) |
|
|
|
/** |
|
* v4l2_m2m_get_src_vq() - return vb2_queue for source buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline |
|
struct vb2_queue *v4l2_m2m_get_src_vq(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return &m2m_ctx->out_q_ctx.q; |
|
} |
|
|
|
/** |
|
* v4l2_m2m_get_dst_vq() - return vb2_queue for destination buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline |
|
struct vb2_queue *v4l2_m2m_get_dst_vq(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return &m2m_ctx->cap_q_ctx.q; |
|
} |
|
|
|
/** |
|
* v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and |
|
* return it |
|
* |
|
* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx |
|
*/ |
|
struct vb2_v4l2_buffer *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx); |
|
|
|
/** |
|
* v4l2_m2m_src_buf_remove() - take off a source buffer from the list of ready |
|
* buffers and return it |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_src_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_buf_remove(&m2m_ctx->out_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_dst_buf_remove() - take off a destination buffer from the list of |
|
* ready buffers and return it |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
*/ |
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx) |
|
{ |
|
return v4l2_m2m_buf_remove(&m2m_ctx->cap_q_ctx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_buf_remove_by_buf() - take off exact buffer from the list of ready |
|
* buffers |
|
* |
|
* @q_ctx: pointer to struct @v4l2_m2m_queue_ctx |
|
* @vbuf: the buffer to be removed |
|
*/ |
|
void v4l2_m2m_buf_remove_by_buf(struct v4l2_m2m_queue_ctx *q_ctx, |
|
struct vb2_v4l2_buffer *vbuf); |
|
|
|
/** |
|
* v4l2_m2m_src_buf_remove_by_buf() - take off exact source buffer from the list |
|
* of ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @vbuf: the buffer to be removed |
|
*/ |
|
static inline void v4l2_m2m_src_buf_remove_by_buf(struct v4l2_m2m_ctx *m2m_ctx, |
|
struct vb2_v4l2_buffer *vbuf) |
|
{ |
|
v4l2_m2m_buf_remove_by_buf(&m2m_ctx->out_q_ctx, vbuf); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_dst_buf_remove_by_buf() - take off exact destination buffer from the |
|
* list of ready buffers |
|
* |
|
* @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx |
|
* @vbuf: the buffer to be removed |
|
*/ |
|
static inline void v4l2_m2m_dst_buf_remove_by_buf(struct v4l2_m2m_ctx *m2m_ctx, |
|
struct vb2_v4l2_buffer *vbuf) |
|
{ |
|
v4l2_m2m_buf_remove_by_buf(&m2m_ctx->cap_q_ctx, vbuf); |
|
} |
|
|
|
struct vb2_v4l2_buffer * |
|
v4l2_m2m_buf_remove_by_idx(struct v4l2_m2m_queue_ctx *q_ctx, unsigned int idx); |
|
|
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_src_buf_remove_by_idx(struct v4l2_m2m_ctx *m2m_ctx, unsigned int idx) |
|
{ |
|
return v4l2_m2m_buf_remove_by_idx(&m2m_ctx->out_q_ctx, idx); |
|
} |
|
|
|
static inline struct vb2_v4l2_buffer * |
|
v4l2_m2m_dst_buf_remove_by_idx(struct v4l2_m2m_ctx *m2m_ctx, unsigned int idx) |
|
{ |
|
return v4l2_m2m_buf_remove_by_idx(&m2m_ctx->cap_q_ctx, idx); |
|
} |
|
|
|
/** |
|
* v4l2_m2m_buf_copy_metadata() - copy buffer metadata from |
|
* the output buffer to the capture buffer |
|
* |
|
* @out_vb: the output buffer that is the source of the metadata. |
|
* @cap_vb: the capture buffer that will receive the metadata. |
|
* @copy_frame_flags: copy the KEY/B/PFRAME flags as well. |
|
* |
|
* This helper function copies the timestamp, timecode (if the TIMECODE |
|
* buffer flag was set), field and the TIMECODE, KEYFRAME, BFRAME, PFRAME |
|
* and TSTAMP_SRC_MASK flags from @out_vb to @cap_vb. |
|
* |
|
* If @copy_frame_flags is false, then the KEYFRAME, BFRAME and PFRAME |
|
* flags are not copied. This is typically needed for encoders that |
|
* set this bits explicitly. |
|
*/ |
|
void v4l2_m2m_buf_copy_metadata(const struct vb2_v4l2_buffer *out_vb, |
|
struct vb2_v4l2_buffer *cap_vb, |
|
bool copy_frame_flags); |
|
|
|
/* v4l2 request helper */ |
|
|
|
void v4l2_m2m_request_queue(struct media_request *req); |
|
|
|
/* v4l2 ioctl helpers */ |
|
|
|
int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv, |
|
struct v4l2_requestbuffers *rb); |
|
int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh, |
|
struct v4l2_create_buffers *create); |
|
int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh, |
|
struct v4l2_buffer *buf); |
|
int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh, |
|
struct v4l2_exportbuffer *eb); |
|
int v4l2_m2m_ioctl_qbuf(struct file *file, void *fh, |
|
struct v4l2_buffer *buf); |
|
int v4l2_m2m_ioctl_dqbuf(struct file *file, void *fh, |
|
struct v4l2_buffer *buf); |
|
int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *fh, |
|
struct v4l2_buffer *buf); |
|
int v4l2_m2m_ioctl_streamon(struct file *file, void *fh, |
|
enum v4l2_buf_type type); |
|
int v4l2_m2m_ioctl_streamoff(struct file *file, void *fh, |
|
enum v4l2_buf_type type); |
|
int v4l2_m2m_ioctl_encoder_cmd(struct file *file, void *fh, |
|
struct v4l2_encoder_cmd *ec); |
|
int v4l2_m2m_ioctl_decoder_cmd(struct file *file, void *fh, |
|
struct v4l2_decoder_cmd *dc); |
|
int v4l2_m2m_ioctl_try_encoder_cmd(struct file *file, void *fh, |
|
struct v4l2_encoder_cmd *ec); |
|
int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh, |
|
struct v4l2_decoder_cmd *dc); |
|
int v4l2_m2m_ioctl_stateless_try_decoder_cmd(struct file *file, void *fh, |
|
struct v4l2_decoder_cmd *dc); |
|
int v4l2_m2m_ioctl_stateless_decoder_cmd(struct file *file, void *priv, |
|
struct v4l2_decoder_cmd *dc); |
|
int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma); |
|
__poll_t v4l2_m2m_fop_poll(struct file *file, poll_table *wait); |
|
|
|
#endif /* _MEDIA_V4L2_MEM2MEM_H */ |
|
|
|
|