mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-10-31 22:25:38 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

ringbuffer: simplify the API

Browse source 
Use absolute indexes that we let wrap around. We can then easily detect
how much we under of overflowed by using serial number arithmetic.
Remove the Areas, we can trivially compute this ourselves, move the
logic in read/write_data.
This commit is contained in:
Wim Taymans 2017-04-20 11:25:24 +02:00
parent 90ea120d3c
commit 0b508db9fc
6 changed files with 107 additions and 138 deletions
Download patch file Download diff file Expand all files Collapse all files

14
spa/plugins/alsa/alsa-utils.c
View file

@ -391,8 +391,9 @@ pull_frames_ringbuffer (SpaALSAState *state,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t frames)
{
SpaRingbufferArea areas[2];
size_t size, avail;
int32_t avail;
uint32_t index;
size_t size;
SpaALSABuffer *b;
uint8_t *src, *dst;
@ -401,17 +402,16 @@ pull_frames_ringbuffer (SpaALSAState *state,
src = b->outbuf->datas[0].data;
dst = SPA_MEMBER (my_areas[0].addr, offset * state->frame_size, uint8_t);
avail = spa_ringbuffer_get_read_areas (&b->rb->ringbuffer, areas);
avail = spa_ringbuffer_get_read_index (&b->rb->ringbuffer, &index);
size = SPA_MIN (avail, frames * state->frame_size);
spa_log_trace (state->log, "%u %u %u %u %zd %zd",
areas[0].offset, areas[0].len,
areas[1].offset, areas[1].len, offset, size);
spa_log_trace (state->log, "%u %d %zd %zd", index, avail, offset, size);
if (size > 0) {
spa_ringbuffer_read_data (&b->rb->ringbuffer,
src,
areas,
index & b->rb->ringbuffer.mask,
dst,
size);
spa_ringbuffer_read_advance (&b->rb->ringbuffer, size);