513 lines
17 KiB
C
513 lines
17 KiB
C
|
/*
|
||
|
|
* 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, <pawel@osciak.com>
|
||
|
|
* Marek Szyprowski, <m.szyprowski@samsung.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by the
|
||
|
|
* Free Software Foundation; either version 2 of the
|
||
|
|
* License, or (at your option) any later version
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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() 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: required. 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() (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.
|
||
|
|
* @lock: optional. Define a driver's own lock callback, instead of using
|
||
|
|
* &v4l2_m2m_ctx->q_lock.
|
||
|
|
* @unlock: optional. Define a driver's own unlock callback, instead of
|
||
|
|
* using &v4l2_m2m_ctx->q_lock.
|
||
|
|
*/
|
||
|
|
struct v4l2_m2m_ops {
|
||
|
|
void (*device_run)(void *priv);
|
||
|
|
int (*job_ready)(void *priv);
|
||
|
|
void (*job_abort)(void *priv);
|
||
|
|
void (*lock)(void *priv);
|
||
|
|
void (*unlock)(void *priv);
|
||
|
|
};
|
||
|
|
|
||
|
|
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 vb2_queue q;
|
||
|
|
|
||
|
|
struct list_head rdy_queue;
|
||
|
|
spinlock_t rdy_spinlock;
|
||
|
|
u8 num_rdy;
|
||
|
|
bool buffered;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct v4l2_m2m_ctx - Memory to memory context structure
|
||
|
|
*
|
||
|
|
* @q_lock: struct &mutex lock
|
||
|
|
* @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
|
||
|
|
*/
|
||
|
|
struct v4l2_m2m_ctx {
|
||
|
|
/* optional cap/out vb2 queues lock */
|
||
|
|
struct mutex *q_lock;
|
||
|
|
|
||
|
|
/* internal use only */
|
||
|
|
struct v4l2_m2m_dev *m2m_dev;
|
||
|
|
|
||
|
|
struct v4l2_m2m_queue_ctx cap_q_ctx;
|
||
|
|
|
||
|
|
struct v4l2_m2m_queue_ctx out_q_ctx;
|
||
|
|
|
||
|
|
/* For device job queue */
|
||
|
|
struct list_head queue;
|
||
|
|
unsigned long job_flags;
|
||
|
|
wait_queue_head_t finished;
|
||
|
|
|
||
|
|
void *priv;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct v4l2_m2m_buffer - Memory to memory buffer
|
||
|
|
*
|
||
|
|
* @vb: pointer to struct &vb2_v4l2_buffer
|
||
|
|
* @list: list of m2m buffers
|
||
|
|
*/
|
||
|
|
struct v4l2_m2m_buffer {
|
||
|
|
struct vb2_v4l2_buffer vb;
|
||
|
|
struct list_head list;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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);
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
v4l2_m2m_buf_done(struct vb2_v4l2_buffer *buf, enum vb2_buffer_state state)
|
||
|
|
{
|
||
|
|
vb2_buffer_done(&buf->vb2_buf, state);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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_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.
|
||
|
|
*/
|
||
|
|
unsigned int 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);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
void *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 void *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 void *v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx)
|
||
|
|
{
|
||
|
|
return v4l2_m2m_next_buf(&m2m_ctx->cap_q_ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
void *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 void *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 void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
|
||
|
|
{
|
||
|
|
return v4l2_m2m_buf_remove(&m2m_ctx->cap_q_ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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_fop_mmap(struct file *file, struct vm_area_struct *vma);
|
||
|
|
unsigned int v4l2_m2m_fop_poll(struct file *file, poll_table *wait);
|
||
|
|
|
||
|
|
#endif /* _MEDIA_V4L2_MEM2MEM_H */
|
||
|
|
|