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module-loopback: recalc delay when starting

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So that we can use the graph rate in case we are configured to follow
the graph rate.
This commit is contained in:
Wim Taymans 2023-06-28 12:36:42 +02:00
parent e3a41b2c49
commit c671c46b87
1 changed files with 65 additions and 37 deletions
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102
src/modules/module-loopback.c
View file

@ -142,6 +142,8 @@ static const struct spa_dict_item module_props[] = {
{ PW_KEY_MODULE_VERSION, PACKAGE_VERSION },
};
#define DEFAULT_RATE 48000
#include <stdlib.h>
#include <signal.h>
#include <getopt.h>
@ -180,7 +182,9 @@ struct impl {
unsigned int do_disconnect:1;
unsigned int recalc_delay:1;
struct spa_audio_info_raw delay_info;
struct spa_io_position *position;
struct spa_audio_info_raw info;
uint32_t rate;
float target_delay;
struct spa_ringbuffer buffer;
uint8_t *buffer_data;
@ -196,7 +200,7 @@ static void capture_destroy(void *d)
static void recalculate_delay(struct impl *impl)
{
uint32_t target = impl->delay_info.rate * impl->target_delay, cdelay, pdelay;
uint32_t target = impl->rate * impl->target_delay, cdelay, pdelay;
uint32_t delay, w;
struct pw_time pwt;
@ -332,6 +336,30 @@ static void param_latency_changed(struct impl *impl, const struct spa_pod *param
impl->recalc_delay = true;
}
static void recalculate_buffer(struct impl *impl)
{
if (impl->target_delay > 0.0f) {
uint32_t delay = impl->rate * impl->target_delay;
void *data;
impl->buffer_size = (delay + (1u<<15)) * 4;
data = realloc(impl->buffer_data, impl->buffer_size * impl->info.channels);
if (data == NULL) {
pw_log_warn("can't allocate delay buffer, delay disabled: %m");
impl->buffer_size = 0;
free(impl->buffer_data);
}
impl->buffer_data = data;
spa_ringbuffer_init(&impl->buffer);
} else {
impl->buffer_size = 0;
free(impl->buffer_data);
impl->buffer_data = NULL;
}
pw_log_info("configured delay:%f buffer:%d", impl->target_delay, impl->buffer_size);
impl->recalc_delay = true;
}
static void stream_state_changed(void *data, enum pw_stream_state old,
enum pw_stream_state state, const char *error)
{
@ -349,35 +377,23 @@ static void stream_state_changed(void *data, enum pw_stream_state old,
case PW_STREAM_STATE_ERROR:
pw_log_info("module %p: error: %s", impl, error);
break;
case PW_STREAM_STATE_STREAMING:
{
uint32_t target = impl->info.rate;
if (target == 0)
target = impl->position ?
impl->position->clock.target_rate.denom : DEFAULT_RATE;
if (impl->rate != target) {
impl->rate = target;
recalculate_buffer(impl);
}
break;
}
default:
break;
}
}
static void recalculate_buffer(struct impl *impl)
{
if (impl->target_delay > 0.0f) {
uint32_t delay = impl->delay_info.rate * impl->target_delay;
void *data;
impl->buffer_size = (delay + (1u<<15)) * 4;
data = realloc(impl->buffer_data, impl->buffer_size * impl->delay_info.channels);
if (data == NULL) {
pw_log_warn("can't allocate delay buffer, delay disabled: %m");
impl->buffer_size = 0;
free(impl->buffer_data);
}
impl->buffer_data = data;
spa_ringbuffer_init(&impl->buffer);
} else {
impl->buffer_size = 0;
free(impl->buffer_data);
impl->buffer_data = NULL;
}
pw_log_info("configured delay:%f buffer:%d", impl->target_delay, impl->buffer_size);
impl->recalc_delay = true;
}
static void capture_param_changed(void *data, uint32_t id, const struct spa_pod *param)
{
struct impl *impl = data;
@ -386,17 +402,15 @@ static void capture_param_changed(void *data, uint32_t id, const struct spa_pod
case SPA_PARAM_Format:
{
struct spa_audio_info_raw info;
if (param == NULL)
return;
if (spa_format_audio_raw_parse(param, &info) < 0)
return;
if (info.rate == 0 ||
info.channels == 0 ||
info.channels > SPA_AUDIO_MAX_CHANNELS)
return;
impl->delay_info = info;
recalculate_buffer(impl);
spa_zero(info);
if (param != NULL) {
if (spa_format_audio_raw_parse(param, &info) < 0 ||
info.channels == 0 ||
info.channels > SPA_AUDIO_MAX_CHANNELS)
return;
}
impl->rate = 0;
impl->info = info;
break;
}
case SPA_PARAM_Latency:
@ -405,12 +419,25 @@ static void capture_param_changed(void *data, uint32_t id, const struct spa_pod
}
}
static void io_changed(void *data, uint32_t id, void *area, uint32_t size)
{
struct impl *impl = data;
switch (id) {
case SPA_IO_Position:
impl->position = area;
break;
default:
break;
}
}
static const struct pw_stream_events in_stream_events = {
PW_VERSION_STREAM_EVENTS,
.destroy = capture_destroy,
.process = capture_process,
.state_changed = stream_state_changed,
.param_changed = capture_param_changed,
.io_changed = io_changed,
};
static void playback_destroy(void *d)
@ -436,6 +463,7 @@ static const struct pw_stream_events out_stream_events = {
.process = playback_process,
.state_changed = stream_state_changed,
.param_changed = playback_param_changed,
.io_changed = io_changed,
};
static int setup_streams(struct impl *impl)