/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Memory-to-memory device framework for Video for Linux 2. * * Helper functions for devices that use memory buffers for both source * and destination. * * Copyright (c) 2009 Samsung Electronics Co., Ltd. * Pawel Osciak, <[email protected]> * Marek Szyprowski, <[email protected]> */ #ifndef _MEDIA_V4L2_MEM2MEM_H #define _MEDIA_V4L2_MEM2MEM_H #include <media/videobuf2-v4l2.h> /** * struct v4l2_m2m_ops - mem-to-mem device driver callbacks * @device_run: required. Begin the actual job (transaction) inside this * callback. * The job does NOT have to end before this callback returns * (and it will be the usual case). When the job finishes, * v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() * has to be called. * @job_ready: optional. Should return 0 if the driver does not have a job * fully prepared to run yet (i.e. it will not be able to finish a * transaction without sleeping). If not provided, it will be * assumed that one source and one destination buffer are all * that is required for the driver to perform one full transaction. * This method may not sleep. * @job_abort: optional. Informs the driver that it has to abort the currently * running transaction as soon as possible (i.e. as soon as it can * stop the device safely; e.g. in the next interrupt handler), * even if the transaction would not have been finished by then. * After the driver performs the necessary steps, it has to call * v4l2_m2m_job_finish() or v4l2_m2m_buf_done_and_job_finish() as * if the transaction ended normally. * This function does not have to (and will usually not) wait * until the device enters a state when it can be stopped. */ struct v4l2_m2m_ops { … }; struct video_device; struct v4l2_m2m_dev; /** * struct v4l2_m2m_queue_ctx - represents a queue for buffers ready to be * processed * * @q: pointer to struct &vb2_queue * @rdy_queue: List of V4L2 mem-to-mem queues * @rdy_spinlock: spin lock to protect the struct usage * @num_rdy: number of buffers ready to be processed * @buffered: is the queue buffered? * * Queue for buffers ready to be processed as soon as this * instance receives access to the device. */ struct v4l2_m2m_queue_ctx { … }; /** * struct v4l2_m2m_ctx - Memory to memory context structure * * @q_lock: struct &mutex lock * @new_frame: valid in the device_run callback: if true, then this * starts a new frame; if false, then this is a new slice * for an existing frame. This is always true unless * V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF is set, which * indicates slicing support. * @is_draining: indicates device is in draining phase * @last_src_buf: indicate the last source buffer for draining * @next_buf_last: next capture queud buffer will be tagged as last * @has_stopped: indicate the device has been stopped * @ignore_cap_streaming: If true, job_ready can be called even if the CAPTURE * queue is not streaming. This allows firmware to * analyze the bitstream header which arrives on the * OUTPUT queue. The driver must implement the job_ready * callback correctly to make sure that the requirements * for actual decoding are met. * @m2m_dev: opaque pointer to the internal data to handle M2M context * @cap_q_ctx: Capture (output to memory) queue context * @out_q_ctx: Output (input from memory) queue context * @queue: List of memory to memory contexts * @job_flags: Job queue flags, used internally by v4l2-mem2mem.c: * %TRANS_QUEUED, %TRANS_RUNNING and %TRANS_ABORT. * @finished: Wait queue used to signalize when a job queue finished. * @priv: Instance private data * * The memory to memory context is specific to a file handle, NOT to e.g. * a device. */ struct v4l2_m2m_ctx { … }; /** * struct v4l2_m2m_buffer - Memory to memory buffer * * @vb: pointer to struct &vb2_v4l2_buffer * @list: list of m2m buffers */ struct v4l2_m2m_buffer { … }; /** * v4l2_m2m_get_curr_priv() - return driver private data for the currently * running instance or NULL if no instance is running * * @m2m_dev: opaque pointer to the internal data to handle M2M context */ void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev); /** * v4l2_m2m_get_vq() - return vb2_queue for the given type * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); /** * v4l2_m2m_try_schedule() - check whether an instance is ready to be added to * the pending job queue and add it if so. * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * * There are three basic requirements an instance has to meet to be able to run: * 1) at least one source buffer has to be queued, * 2) at least one destination buffer has to be queued, * 3) streaming has to be on. * * If a queue is buffered (for example a decoder hardware ringbuffer that has * to be drained before doing streamoff), allow scheduling without v4l2 buffers * on that queue. * * There may also be additional, custom requirements. In such case the driver * should supply a custom callback (job_ready in v4l2_m2m_ops) that should * return 1 if the instance is ready. * An example of the above could be an instance that requires more than one * src/dst buffer per transaction. */ void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx); /** * v4l2_m2m_job_finish() - inform the framework that a job has been finished * and have it clean up * * @m2m_dev: opaque pointer to the internal data to handle M2M context * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * * Called by a driver to yield back the device after it has finished with it. * Should be called as soon as possible after reaching a state which allows * other instances to take control of the device. * * This function has to be called only after &v4l2_m2m_ops->device_run * callback has been called on the driver. To prevent recursion, it should * not be called directly from the &v4l2_m2m_ops->device_run callback though. */ void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev, struct v4l2_m2m_ctx *m2m_ctx); /** * v4l2_m2m_buf_done_and_job_finish() - return source/destination buffers with * state and inform the framework that a job has been finished and have it * clean up * * @m2m_dev: opaque pointer to the internal data to handle M2M context * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @state: vb2 buffer state passed to v4l2_m2m_buf_done(). * * Drivers that set V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF must use this * function instead of job_finish() to take held buffers into account. It is * optional for other drivers. * * This function removes the source buffer from the ready list and returns * it with the given state. The same is done for the destination buffer, unless * it is marked 'held'. In that case the buffer is kept on the ready list. * * After that the job is finished (see job_finish()). * * This allows for multiple output buffers to be used to fill in a single * capture buffer. This is typically used by stateless decoders where * multiple e.g. H.264 slices contribute to a single decoded frame. */ void v4l2_m2m_buf_done_and_job_finish(struct v4l2_m2m_dev *m2m_dev, struct v4l2_m2m_ctx *m2m_ctx, enum vb2_buffer_state state); static inline void v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state) { … } /** * v4l2_m2m_clear_state() - clear encoding/decoding state * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void v4l2_m2m_clear_state(struct v4l2_m2m_ctx *m2m_ctx) { … } /** * v4l2_m2m_mark_stopped() - set current encoding/decoding state as stopped * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline void v4l2_m2m_mark_stopped(struct v4l2_m2m_ctx *m2m_ctx) { … } /** * v4l2_m2m_dst_buf_is_last() - return the current encoding/decoding session * draining management state of next queued capture buffer * * This last capture buffer should be tagged with V4L2_BUF_FLAG_LAST to notify * the end of the capture session. * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline bool v4l2_m2m_dst_buf_is_last(struct v4l2_m2m_ctx *m2m_ctx) { … } /** * v4l2_m2m_has_stopped() - return the current encoding/decoding session * stopped state * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx */ static inline bool v4l2_m2m_has_stopped(struct v4l2_m2m_ctx *m2m_ctx) { … } /** * v4l2_m2m_is_last_draining_src_buf() - return the output buffer draining * state in the current encoding/decoding session * * This will identify the last output buffer queued before a session stop * was required, leading to an actual encoding/decoding session stop state * in the encoding/decoding process after being processed. * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @vbuf: pointer to struct &v4l2_buffer */ static inline bool v4l2_m2m_is_last_draining_src_buf(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_v4l2_buffer *vbuf) { … } /** * v4l2_m2m_last_buffer_done() - marks the buffer with LAST flag and DONE * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @vbuf: pointer to struct &v4l2_buffer */ void v4l2_m2m_last_buffer_done(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_v4l2_buffer *vbuf); /** * v4l2_m2m_suspend() - stop new jobs from being run and wait for current job * to finish * * @m2m_dev: opaque pointer to the internal data to handle M2M context * * Called by a driver in the suspend hook. Stop new jobs from being run, and * wait for current running job to finish. */ void v4l2_m2m_suspend(struct v4l2_m2m_dev *m2m_dev); /** * v4l2_m2m_resume() - resume job running and try to run a queued job * * @m2m_dev: opaque pointer to the internal data to handle M2M context * * Called by a driver in the resume hook. This reverts the operation of * v4l2_m2m_suspend() and allows job to be run. Also try to run a queued job if * there is any. */ void v4l2_m2m_resume(struct v4l2_m2m_dev *m2m_dev); /** * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @reqbufs: pointer to struct &v4l2_requestbuffers */ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_requestbuffers *reqbufs); /** * v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @buf: pointer to struct &v4l2_buffer * * See v4l2_m2m_mmap() documentation for details. */ int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); /** * v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on * the type * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); /** * v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on * the type * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); /** * v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on * the type * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @buf: pointer to struct &v4l2_buffer */ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_buffer *buf); /** * v4l2_m2m_create_bufs() - create a source or destination buffer, depending * on the type * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @create: pointer to struct &v4l2_create_buffers */ int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_create_buffers *create); /** * v4l2_m2m_expbuf() - export a source or destination buffer, depending on * the type * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @eb: pointer to struct &v4l2_exportbuffer */ int v4l2_m2m_expbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_exportbuffer *eb); /** * v4l2_m2m_streamon() - turn on streaming for a video queue * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); /** * v4l2_m2m_streamoff() - turn off streaming for a video queue * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @type: type of the V4L2 buffer, as defined by enum &v4l2_buf_type */ int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, enum v4l2_buf_type type); /** * v4l2_m2m_update_start_streaming_state() - update the encoding/decoding * session state when a start of streaming of a video queue is requested * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @q: queue */ void v4l2_m2m_update_start_streaming_state(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_queue *q); /** * v4l2_m2m_update_stop_streaming_state() - update the encoding/decoding * session state when a stop of streaming of a video queue is requested * * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @q: queue */ void v4l2_m2m_update_stop_streaming_state(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_queue *q); /** * v4l2_m2m_encoder_cmd() - execute an encoder command * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @ec: pointer to the encoder command */ int v4l2_m2m_encoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_encoder_cmd *ec); /** * v4l2_m2m_decoder_cmd() - execute a decoder command * * @file: pointer to struct &file * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx * @dc: pointer to the decoder command */ int v4l2_m2m_decoder_cmd(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_decoder_cmd *dc); /** * v4l2_m2m_poll() - poll replacement, for destination buffers only * * @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 the video buffer, which will receive normal per-queue offsets * and proper vb2 queue pointers. The differentiation is made outside * vb2 by adding a predefined offset to buffers from one of the queues * and subtracting it before passing it back to vb2. 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); #ifndef CONFIG_MMU unsigned long v4l2_m2m_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); #endif /** * 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 vb2_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) { … } static inline void v4l2_m2m_set_dst_buffered(struct v4l2_m2m_ctx *m2m_ctx, bool 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 vb2_queue_ops->ops->buf_queue, vb2_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) { … } /** * 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) { … } /** * 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) { … } /** * 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) { … } /** * 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 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_last_src_buf(struct v4l2_m2m_ctx *m2m_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) { … } /** * 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) … /** * 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) … /** * 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) … /** * 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) … /** * 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) { … } /** * 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) { … } /** * 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) { … } /** * 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) { … } /** * 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_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) { … } 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) { … } static inline struct vb2_v4l2_buffer * v4l2_m2m_dst_buf_remove_by_idx(struct v4l2_m2m_ctx *m2m_ctx, unsigned int 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_remove_bufs(struct file *file, void *priv, struct v4l2_remove_buffers *d); 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 */
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