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stream: improve stream API

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Simplify the stream API. make just 2 methods to queue and dequeue
buffers. Make just one callback when new buffers can be dequeued.
Add support for driver nodes such as the video-src.
Pass a pw_buffer structure to add/remove_buffer and make it possible
to attach metadata to it. This makes it a lot easier to implement
the gstreamer pipewire pool.
Call the stream process function from the main loop and use a lockfree
ringbuffer to pass buffers between the threads. Make it possible to
also call process from the RT thread.
unmap the buffer data when needed.
This commit is contained in:
Wim Taymans 2018-03-22 16:40:27 +01:00
parent 97547d726f
commit f9ceedb714
11 changed files with 451 additions and 508 deletions
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16
src/examples/audio-src.c
View file

@ -89,18 +89,17 @@ static void fill_f32(struct data *d, void *dest, int avail)
}
}
static void on_need_buffer(void *userdata)
static void on_process(void *userdata)
{
struct data *data = userdata;
uint32_t id;
struct pw_buffer *b;
struct spa_buffer *buf;
uint8_t *p;
id = pw_stream_get_empty_buffer(data->stream);
if (id == SPA_ID_INVALID)
if ((b = pw_stream_dequeue_buffer(data->stream)) == NULL)
return;
buf = pw_stream_peek_buffer(data->stream, id);
buf = b->buffer;
if ((p = buf->datas[0].data) == NULL)
return;
@ -109,12 +108,12 @@ static void on_need_buffer(void *userdata)
buf->datas[0].chunk->size = buf->datas[0].maxsize;
pw_stream_send_buffer(data->stream, id);
pw_stream_queue_buffer(data->stream, b);
}
static const struct pw_stream_events stream_events = {
PW_VERSION_STREAM_EVENTS,
.need_buffer = on_need_buffer,
.process = on_process,
};
static void on_state_changed(void *_data, enum pw_remote_state old, enum pw_remote_state state, const char *error)
@ -159,7 +158,8 @@ static void on_state_changed(void *_data, enum pw_remote_state old, enum pw_remo
PW_DIRECTION_OUTPUT,
NULL,
PW_STREAM_FLAG_AUTOCONNECT |
PW_STREAM_FLAG_MAP_BUFFERS,
PW_STREAM_FLAG_MAP_BUFFERS |
PW_STREAM_FLAG_RT_PROCESS,
params, 1);
break;
}