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alsa: update rate/duration from target

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Also reorganize some things to reuse more code.
This commit is contained in:
Wim Taymans 2023-03-23 18:04:36 +01:00
parent 2adf8d38d5
commit 1bdd5eee69
1 changed files with 36 additions and 30 deletions
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66
spa/plugins/alsa/alsa-pcm.c
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@ -1993,20 +1993,23 @@ static int setup_matching(struct state *state)
return 0;
}
static inline void check_position_config(struct state *state)
static inline int check_position_config(struct state *state)
{
if (SPA_UNLIKELY(state->position == NULL))
return;
return 0;
if (SPA_UNLIKELY((state->duration != state->position->clock.duration) ||
(state->rate_denom != state->position->clock.rate.denom))) {
state->duration = state->position->clock.duration;
state->rate_denom = state->position->clock.rate.denom;
if (state->rate_denom == 0 || state->duration == 0)
return -EIO;
state->threshold = SPA_SCALE32_UP(state->duration, state->rate, state->rate_denom);
state->max_error = SPA_MAX(256.0f, state->threshold / 2.0f);
state->resample = ((uint32_t)state->rate != state->rate_denom) || state->matching;
state->alsa_sync = true;
}
return 0;
}
int spa_alsa_write(struct state *state)
@ -2015,10 +2018,11 @@ int spa_alsa_write(struct state *state)
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t written, frames, offset, off, to_write, total_written, max_write;
snd_pcm_sframes_t commitres;
int res = 0, missed;
int res, missed;
size_t frame_size = state->frame_size;
check_position_config(state);
if ((res = check_position_config(state)) < 0)
return res;
max_write = state->buffer_frames;
@ -2248,9 +2252,10 @@ int spa_alsa_read(struct state *state)
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t read, frames, offset;
snd_pcm_sframes_t commitres;
int res = 0, missed;
int res, missed;
check_position_config(state);
if ((res = check_position_config(state)) < 0)
return res;
max_read = state->buffer_frames;
@ -2447,6 +2452,17 @@ static int handle_capture(struct state *state, uint64_t current_time,
return 0;
}
static void update_target(struct state *state)
{
struct spa_io_position *pos;
if (SPA_UNLIKELY((pos = state->position) == NULL))
return;
pos->clock.duration = pos->clock.target_duration;
pos->clock.rate = pos->clock.target_rate;
}
static void alsa_on_timeout_event(struct spa_source *source)
{
struct state *state = source->data;
@ -2466,10 +2482,14 @@ static void alsa_on_timeout_event(struct spa_source *source)
return;
}
}
state->position->clock.duration = state->position->clock.target_duration;
state->position->clock.rate = state->position->clock.target_rate;
check_position_config(state);
update_target(state);
if (SPA_UNLIKELY((res = check_position_config(state)) < 0)) {
spa_log_warn(state->log, "%p: error invalid position: %s",
state, spa_strerror(res));
return;
}
current_time = state->next_time;
@ -2551,34 +2571,20 @@ int spa_alsa_start(struct state *state)
if (state->started)
return 0;
if (state->position) {
state->position->clock.duration = state->position->clock.target_duration;
state->position->clock.rate = state->position->clock.target_rate;
state->duration = state->position->clock.duration;
state->rate_denom = state->position->clock.rate.denom;
}
else {
spa_log_warn(state->log, "%s: no position set, using defaults",
state->props.device);
state->duration = 1024;
state->rate_denom = state->rate;
}
if (state->rate_denom == 0) {
spa_log_error(state->log, "%s: unset rate_denom", state->props.device);
return -EIO;
}
if (state->duration == 0) {
spa_log_error(state->log, "%s: unset duration", state->props.device);
state->following = is_following(state);
if (!state->following)
update_target(state);
if (check_position_config(state) < 0) {
spa_log_error(state->log, "%s: invalid position config", state->props.device);
return -EIO;
}
state->following = is_following(state);
setup_matching(state);
spa_dll_init(&state->dll);
state->threshold = SPA_SCALE32_UP(state->duration, state->rate, state->rate_denom);
state->last_threshold = state->threshold;
state->max_error = SPA_MAX(256.0f, state->threshold / 2.0f);
spa_log_debug(state->log, "%p: start %d duration:%d rate:%d follower:%d match:%d resample:%d",
state, state->threshold, state->duration, state->rate_denom,