diff options
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/videobuf2-core.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index b1859f6953b2..46e76096c22a 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -20,6 +20,7 @@ struct vb2_alloc_ctx; struct vb2_fileio_data; +struct vb2_threadio_data; /** * struct vb2_mem_ops - memory handling/memory allocator operations @@ -375,6 +376,7 @@ struct v4l2_fh; * @start_streaming_called: start_streaming() was called successfully and we * started streaming. * @fileio: file io emulator internal data, used only if emulator is active + * @threadio: thread io internal data, used only if thread is active */ struct vb2_queue { enum v4l2_buf_type type; @@ -411,6 +413,7 @@ struct vb2_queue { unsigned int start_streaming_called:1; struct vb2_fileio_data *fileio; + struct vb2_threadio_data *threadio; #ifdef CONFIG_VIDEO_ADV_DEBUG /* @@ -461,6 +464,35 @@ size_t vb2_read(struct vb2_queue *q, char __user *data, size_t count, loff_t *ppos, int nonblock); size_t vb2_write(struct vb2_queue *q, const char __user *data, size_t count, loff_t *ppos, int nonblock); +/** + * vb2_thread_fnc - callback function for use with vb2_thread + * + * This is called whenever a buffer is dequeued in the thread. + */ +typedef int (*vb2_thread_fnc)(struct vb2_buffer *vb, void *priv); + +/** + * vb2_thread_start() - start a thread for the given queue. + * @q: videobuf queue + * @fnc: callback function + * @priv: priv pointer passed to the callback function + * @thread_name:the name of the thread. This will be prefixed with "vb2-". + * + * This starts a thread that will queue and dequeue until an error occurs + * or @vb2_thread_stop is called. + * + * This function should not be used for anything else but the videobuf2-dvb + * support. If you think you have another good use-case for this, then please + * contact the linux-media mailinglist first. + */ +int vb2_thread_start(struct vb2_queue *q, vb2_thread_fnc fnc, void *priv, + const char *thread_name); + +/** + * vb2_thread_stop() - stop the thread for the given queue. + * @q: videobuf queue + */ +int vb2_thread_stop(struct vb2_queue *q); /** * vb2_is_streaming() - return streaming status of the queue |