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![Hans Verkuil](/assets/img/avatar_default.png)
It is confusing to refer to vb2 structures with 'videobuf', since that typically is used to refer to the old videobuf version 1 framework. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
879 lines
29 KiB
C
879 lines
29 KiB
C
/* 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, <pawel@osciak.com>
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* Marek Szyprowski, <m.szyprowski@samsung.com>
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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
|
|
*/
|
|
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)
|
|
{
|
|
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 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)
|
|
{
|
|
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
|
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* flags are not copied. This is typically needed for encoders that
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* set this bits explicitly.
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*/
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void v4l2_m2m_buf_copy_metadata(const struct vb2_v4l2_buffer *out_vb,
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struct vb2_v4l2_buffer *cap_vb,
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bool copy_frame_flags);
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/* v4l2 request helper */
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void v4l2_m2m_request_queue(struct media_request *req);
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/* v4l2 ioctl helpers */
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|
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int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
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|
struct v4l2_requestbuffers *rb);
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int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh,
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|
struct v4l2_create_buffers *create);
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|
int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh,
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|
struct v4l2_buffer *buf);
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|
int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh,
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|
struct v4l2_exportbuffer *eb);
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|
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);
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|
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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