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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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9
man/pulse-daemon.conf.5.xml.in
View file

@ -414,6 +414,15 @@ USA.
<p><opt>default-channel-map</opt> The default channel map.</p>
</option>
<option>
<p><opt>alternate-sample-rate</opt> The alternate sample
frequency. Sinks and sources will use either the
default-rate-rate value or this alternate value, typically 44.1
or 48kHz. Switching between default and alternate values is
enabled only when the sinks/sources are suspended. This option
is ignored in passthrough mode where the stream rate will be used.</p>
</option>
</section>
<section name="Default Fragment Settings">

25
src/daemon/daemon-conf.c
View file

@ -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);

1
src/daemon/daemon-conf.h
View file

@ -131,6 +131,7 @@ typedef struct pa_daemon_conf {
unsigned deferred_volume_safety_margin_usec;
int deferred_volume_extra_delay_usec;
pa_sample_spec default_sample_spec;
uint32_t alternate_sample_rate;
pa_channel_map default_channel_map;
size_t shm_size;
} pa_daemon_conf;

1
src/daemon/daemon.conf.in
View file

@ -80,6 +80,7 @@ ifelse(@HAVE_SYS_RESOURCE_H@, 1, [dnl
; default-sample-format = s16le
; default-sample-rate = 44100
; alternate-sample-rate = 48000
; default-sample-channels = 2
; default-channel-map = front-left,front-right

1
src/daemon/main.c
View file

@ -1013,6 +1013,7 @@ int main(int argc, char *argv[]) {
}
c->default_sample_spec = conf->default_sample_spec;
c->alternate_sample_rate = conf->alternate_sample_rate;
c->default_channel_map = conf->default_channel_map;
c->default_n_fragments = conf->default_n_fragments;
c->default_fragment_size_msec = conf->default_fragment_size_msec;

45
src/modules/dbus/iface-core.c
View file

@ -62,6 +62,8 @@ static void handle_get_default_sample_format(DBusConnection *conn, DBusMessage *
static void handle_set_default_sample_format(DBusConnection *conn, DBusMessage *msg, DBusMessageIter *iter, void *userdata);
static void handle_get_default_sample_rate(DBusConnection *conn, DBusMessage *msg, void *userdata);
static void handle_set_default_sample_rate(DBusConnection *conn, DBusMessage *msg, DBusMessageIter *iter, void *userdata);
static void handle_get_alternate_sample_rate(DBusConnection *conn, DBusMessage *msg, void *userdata);
static void handle_set_alternate_sample_rate(DBusConnection *conn, DBusMessage *msg, DBusMessageIter *iter, void *userdata);
static void handle_get_cards(DBusConnection *conn, DBusMessage *msg, void *userdata);
static void handle_get_sinks(DBusConnection *conn, DBusMessage *msg, void *userdata);
static void handle_get_fallback_sink(DBusConnection *conn, DBusMessage *msg, void *userdata);
@ -129,6 +131,7 @@ enum property_handler_index {
PROPERTY_HANDLER_DEFAULT_CHANNELS,
PROPERTY_HANDLER_DEFAULT_SAMPLE_FORMAT,
PROPERTY_HANDLER_DEFAULT_SAMPLE_RATE,
PROPERTY_HANDLER_ALTERNATE_SAMPLE_RATE,
PROPERTY_HANDLER_CARDS,
PROPERTY_HANDLER_SINKS,
PROPERTY_HANDLER_FALLBACK_SINK,
@ -154,6 +157,7 @@ static pa_dbus_property_handler property_handlers[PROPERTY_HANDLER_MAX] = {
[PROPERTY_HANDLER_DEFAULT_CHANNELS] = { .property_name = "DefaultChannels", .type = "au", .get_cb = handle_get_default_channels, .set_cb = handle_set_default_channels },
[PROPERTY_HANDLER_DEFAULT_SAMPLE_FORMAT] = { .property_name = "DefaultSampleFormat", .type = "u", .get_cb = handle_get_default_sample_format, .set_cb = handle_set_default_sample_format },
[PROPERTY_HANDLER_DEFAULT_SAMPLE_RATE] = { .property_name = "DefaultSampleRate", .type = "u", .get_cb = handle_get_default_sample_rate, .set_cb = handle_set_default_sample_rate },
[PROPERTY_HANDLER_ALTERNATE_SAMPLE_RATE] = { .property_name = "AlternateSampleRate", .type = "u", .get_cb = handle_get_alternate_sample_rate, .set_cb = handle_set_alternate_sample_rate },
[PROPERTY_HANDLER_CARDS] = { .property_name = "Cards", .type = "ao", .get_cb = handle_get_cards, .set_cb = NULL },
[PROPERTY_HANDLER_SINKS] = { .property_name = "Sinks", .type = "ao", .get_cb = handle_get_sinks, .set_cb = NULL },
[PROPERTY_HANDLER_FALLBACK_SINK] = { .property_name = "FallbackSink", .type = "o", .get_cb = handle_get_fallback_sink, .set_cb = handle_set_fallback_sink },
@ -540,7 +544,8 @@ static void handle_set_default_sample_rate(DBusConnection *conn, DBusMessage *ms
dbus_message_iter_get_basic(iter, &default_sample_rate);
if (default_sample_rate <= 0 || default_sample_rate > PA_RATE_MAX) {
if (default_sample_rate <= 0 || default_sample_rate > PA_RATE_MAX ||
!((default_sample_rate % 4000 == 0) || (default_sample_rate % 11025 == 0))) {
pa_dbus_send_error(conn, msg, DBUS_ERROR_INVALID_ARGS, "Invalid sample rate.");
return;
}
@ -550,6 +555,41 @@ static void handle_set_default_sample_rate(DBusConnection *conn, DBusMessage *ms
pa_dbus_send_empty_reply(conn, msg);
}
static void handle_get_alternate_sample_rate(DBusConnection *conn, DBusMessage *msg, void *userdata) {
pa_dbusiface_core *c = userdata;
dbus_uint32_t alternate_sample_rate;
pa_assert(conn);
pa_assert(msg);
pa_assert(c);
alternate_sample_rate = c->core->alternate_sample_rate;
pa_dbus_send_basic_variant_reply(conn, msg, DBUS_TYPE_UINT32, &alternate_sample_rate);
}
static void handle_set_alternate_sample_rate(DBusConnection *conn, DBusMessage *msg, DBusMessageIter *iter, void *userdata) {
pa_dbusiface_core *c = userdata;
dbus_uint32_t alternate_sample_rate;
pa_assert(conn);
pa_assert(msg);
pa_assert(iter);
pa_assert(c);
dbus_message_iter_get_basic(iter, &alternate_sample_rate);
if (alternate_sample_rate <= 0 || alternate_sample_rate > PA_RATE_MAX ||
!((alternate_sample_rate % 4000 == 0) || (alternate_sample_rate % 11025 == 0))) {
pa_dbus_send_error(conn, msg, DBUS_ERROR_INVALID_ARGS, "Invalid sample rate.");
return;
}
c->core->alternate_sample_rate = alternate_sample_rate;
pa_dbus_send_empty_reply(conn, msg);
}
/* The caller frees the array, but not the strings. */
static const char **get_cards(pa_dbusiface_core *c, unsigned *n) {
const char **cards;
@ -1015,6 +1055,7 @@ static void handle_get_all(DBusConnection *conn, DBusMessage *msg, void *userdat
unsigned n_default_channels;
dbus_uint32_t default_sample_format;
dbus_uint32_t default_sample_rate;
dbus_uint32_t alternate_sample_rate;
const char **cards;
unsigned n_cards;
const char **sinks;
@ -1050,6 +1091,7 @@ static void handle_get_all(DBusConnection *conn, DBusMessage *msg, void *userdat
default_channels = get_default_channels(c, &n_default_channels);
default_sample_format = c->core->default_sample_spec.format;
default_sample_rate = c->core->default_sample_spec.rate;
alternate_sample_rate = c->core->alternate_sample_rate;
cards = get_cards(c, &n_cards);
sinks = get_sinks(c, &n_sinks);
fallback_sink = c->fallback_sink
@ -1082,6 +1124,7 @@ static void handle_get_all(DBusConnection *conn, DBusMessage *msg, void *userdat
pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_DEFAULT_CHANNELS].property_name, DBUS_TYPE_UINT32, default_channels, n_default_channels);
pa_dbus_append_basic_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_DEFAULT_SAMPLE_FORMAT].property_name, DBUS_TYPE_UINT32, &default_sample_format);
pa_dbus_append_basic_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_DEFAULT_SAMPLE_RATE].property_name, DBUS_TYPE_UINT32, &default_sample_rate);
pa_dbus_append_basic_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_ALTERNATE_SAMPLE_RATE].property_name, DBUS_TYPE_UINT32, &alternate_sample_rate);
pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_CARDS].property_name, DBUS_TYPE_OBJECT_PATH, cards, n_cards);
pa_dbus_append_basic_array_variant_dict_entry(&dict_iter, property_handlers[PROPERTY_HANDLER_SINKS].property_name, DBUS_TYPE_OBJECT_PATH, sinks, n_sinks);

1
src/pulsecore/core.h
View file

@ -143,6 +143,7 @@ struct pa_core {
pa_channel_map default_channel_map;
pa_sample_spec default_sample_spec;
uint32_t alternate_sample_rate;
unsigned default_n_fragments, default_fragment_size_msec;
unsigned deferred_volume_safety_margin_usec;
int deferred_volume_extra_delay_usec;

13
src/pulsecore/modargs.c
View file

@ -368,6 +368,19 @@ int pa_modargs_get_sample_spec(pa_modargs *ma, pa_sample_spec *rss) {
return 0;
}
int pa_modargs_get_alternate_sample_rate(pa_modargs *ma, uint32_t *alternate_rate) {
pa_assert(ma);
pa_assert(alternate_rate);
if ((pa_modargs_get_value_u32(ma, "alternate_rate", alternate_rate)) < 0 ||
*alternate_rate <= 0 ||
*alternate_rate > PA_RATE_MAX ||
!((*alternate_rate % 4000 == 0) || (*alternate_rate % 11025 == 0)))
return -1;
return 0;
}
int pa_modargs_get_channel_map(pa_modargs *ma, const char *name, pa_channel_map *rmap) {
pa_channel_map map;
const char *cm;

3
src/pulsecore/modargs.h
View file

@ -58,6 +58,9 @@ structure if no channel_map is found, using pa_channel_map_init_auto() */
int pa_modargs_get_sample_spec_and_channel_map(pa_modargs *ma, pa_sample_spec *ss, pa_channel_map *map, pa_channel_map_def_t def);
/* Return alternate sample rate from "alternate_sample_rate" parameter */
int pa_modargs_get_alternate_sample_rate(pa_modargs *ma, uint32_t *alternate_rate);
int pa_modargs_get_proplist(pa_modargs *ma, const char *name, pa_proplist *p, pa_update_mode_t m);
/* Iterate through the module argument list. The user should allocate a