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alsa: update write offset after each write

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This commit is contained in:
Wim Taymans 2018-07-31 17:40:32 +02:00
parent 57ef49b154
commit ea66ac4075
1 changed files with 6 additions and 3 deletions
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9
spa/plugins/alsa/alsa-utils.c
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@ -376,7 +376,7 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
{
snd_pcm_t *hndl = state->hndl;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t written, frames, offset, to_write;
snd_pcm_uframes_t written, frames, offset, off, to_write;
int res;
if ((res = snd_pcm_mmap_begin(hndl, &my_areas, &offset, &frames)) < 0) {
@ -387,6 +387,7 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
silence = SPA_MIN(silence, frames);
to_write = frames;
off = offset;
written = 0;
while (!spa_list_is_empty(&state->ready) && to_write > 0) {
@ -399,7 +400,7 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
b = spa_list_first(&state->ready, struct buffer, link);
d = b->buf->datas;
dst = SPA_MEMBER(my_areas[0].addr, offset * state->frame_size, uint8_t);
dst = SPA_MEMBER(my_areas[0].addr, off * state->frame_size, uint8_t);
src = d[0].data;
size = d[0].chunk->size;
@ -430,6 +431,7 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
state->ready_offset = 0;
}
written += n_frames;
off += n_frames;
to_write -= n_frames;
if (silence > n_frames)
silence -= n_frames;
@ -440,7 +442,8 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
silence = SPA_MIN(to_write, state->threshold);
if (silence > 0) {
snd_pcm_areas_silence(my_areas, offset, state->channels, silence, state->format);
spa_log_trace(state->log, "silence %ld", silence);
snd_pcm_areas_silence(my_areas, off, state->channels, silence, state->format);
written += silence;
}