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core: infrastructure for alternate sampling rate

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New parameter to avoid resampling. BIG power savings here...

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
This commit is contained in:
Pierre-Louis Bossart 2011-08-02 18:37:27 -05:00 • committed by Arun Raghavan
parent 31a9f195fa
commit 5bcfd2b630
9 changed files with 97 additions and 2 deletions
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25
src/daemon/daemon-conf.c
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@ -101,6 +101,7 @@ static const pa_daemon_conf default_conf = {
.deferred_volume_safety_margin_usec = 8000,
.deferred_volume_extra_delay_usec = 0,
.default_sample_spec = { .format = PA_SAMPLE_S16NE, .rate = 44100, .channels = 2 },
.alternate_sample_rate = 48000,
.default_channel_map = { .channels = 2, .map = { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT } },
.shm_size = 0
#ifdef HAVE_SYS_RESOURCE_H
@ -364,7 +365,8 @@ static int parse_sample_rate(const char *filename, unsigned line, const char *se
pa_assert(rvalue);
pa_assert(data);
if (pa_atou(rvalue, &r) < 0 || r > (uint32_t) PA_RATE_MAX || r <= 0) {
if (pa_atou(rvalue, &r) < 0 || r > (uint32_t) PA_RATE_MAX || r <= 0 ||
!((r % 4000 == 0) || (r % 11025 == 0))) {
pa_log(_("[%s:%u] Invalid sample rate '%s'."), filename, line, rvalue);
return -1;
}
@ -373,6 +375,25 @@ static int parse_sample_rate(const char *filename, unsigned line, const char *se
return 0;
}
static int parse_alternate_sample_rate(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
pa_daemon_conf *c = data;
uint32_t r;
pa_assert(filename);
pa_assert(lvalue);
pa_assert(rvalue);
pa_assert(data);
if (pa_atou(rvalue, &r) < 0 || r > (uint32_t) PA_RATE_MAX || r <= 0 ||
!((r % 4000==0) || (r % 11025 == 0))) {
pa_log(_("[%s:%u] Invalid sample rate '%s'."), filename, line, rvalue);
return -1;
}
c->alternate_sample_rate = r;
return 0;
}
struct channel_conf_info {
pa_daemon_conf *conf;
pa_bool_t default_sample_spec_set;
@ -548,6 +569,7 @@ int pa_daemon_conf_load(pa_daemon_conf *c, const char *filename) {
{ "resample-method", parse_resample_method, c, NULL },
{ "default-sample-format", parse_sample_format, c, NULL },
{ "default-sample-rate", parse_sample_rate, c, NULL },
{ "alternate-sample-rate", parse_alternate_sample_rate, c, NULL },
{ "default-sample-channels", parse_sample_channels, &ci, NULL },
{ "default-channel-map", parse_channel_map, &ci, NULL },
{ "default-fragments", parse_fragments, c, NULL },
@ -751,6 +773,7 @@ char *pa_daemon_conf_dump(pa_daemon_conf *c) {
pa_strbuf_printf(s, "enable-lfe-remixing = %s\n", pa_yes_no(!c->disable_lfe_remixing));
pa_strbuf_printf(s, "default-sample-format = %s\n", pa_sample_format_to_string(c->default_sample_spec.format));
pa_strbuf_printf(s, "default-sample-rate = %u\n", c->default_sample_spec.rate);
pa_strbuf_printf(s, "alternate-sample-rate = %u\n", c->alternate_sample_rate);
pa_strbuf_printf(s, "default-sample-channels = %u\n", c->default_sample_spec.channels);
pa_strbuf_printf(s, "default-channel-map = %s\n", pa_channel_map_snprint(cm, sizeof(cm), &c->default_channel_map));
pa_strbuf_printf(s, "default-fragments = %u\n", c->default_n_fragments);