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bluetooth: Implement org.bluez.MediaEndpoint1.SelectConfiguration()

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This commit is contained in:
João Paulo Rechi Vita 2013-09-24 19:45:25 -03:00 • committed by Tanu Kaskinen
parent 449d6cb1e2
commit 2594909338
2 changed files with 166 additions and 3 deletions
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3
src/Makefile.am
View file

@ -2051,7 +2051,8 @@ module_bluez4_device_la_CFLAGS = $(AM_CFLAGS) $(DBUS_CFLAGS) $(SBC_CFLAGS)
# Bluetooth BlueZ 5 sink / source
libbluez5_util_la_SOURCES = \
modules/bluetooth/bluez5-util.c \
modules/bluetooth/bluez5-util.h
modules/bluetooth/bluez5-util.h \
modules/bluetooth/a2dp-codecs.h
libbluez5_util_la_LDFLAGS = -avoid-version
libbluez5_util_la_LIBADD = $(MODULE_LIBADD) $(DBUS_LIBS)
libbluez5_util_la_CFLAGS = $(AM_CFLAGS) $(DBUS_CFLAGS)

166
src/modules/bluetooth/bluez5-util.c
View file

@ -409,6 +409,48 @@ fail:
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
static uint8_t a2dp_default_bitpool(uint8_t freq, uint8_t mode) {
/* These bitpool values were chosen based on the A2DP spec recommendation */
switch (freq) {
case SBC_SAMPLING_FREQ_16000:
case SBC_SAMPLING_FREQ_32000:
return 53;
case SBC_SAMPLING_FREQ_44100:
switch (mode) {
case SBC_CHANNEL_MODE_MONO:
case SBC_CHANNEL_MODE_DUAL_CHANNEL:
return 31;
case SBC_CHANNEL_MODE_STEREO:
case SBC_CHANNEL_MODE_JOINT_STEREO:
return 53;
}
pa_log_warn("Invalid channel mode %u", mode);
return 53;
case SBC_SAMPLING_FREQ_48000:
switch (mode) {
case SBC_CHANNEL_MODE_MONO:
case SBC_CHANNEL_MODE_DUAL_CHANNEL:
return 29;
case SBC_CHANNEL_MODE_STEREO:
case SBC_CHANNEL_MODE_JOINT_STEREO:
return 51;
}
pa_log_warn("Invalid channel mode %u", mode);
return 51;
}
pa_log_warn("Invalid sampling freq %u", freq);
return 53;
}
const char *pa_bluetooth_profile_to_string(pa_bluetooth_profile_t profile) {
switch(profile) {
case PA_BLUETOOTH_PROFILE_A2DP_SINK:
@ -589,11 +631,131 @@ fail2:
}
static DBusMessage *endpoint_select_configuration(DBusConnection *conn, DBusMessage *m, void *userdata) {
pa_bluetooth_discovery *y = userdata;
a2dp_sbc_t *cap, config;
uint8_t *pconf = (uint8_t *) &config;
int i, size;
DBusMessage *r;
DBusError err;
pa_assert_se(r = dbus_message_new_error(m, BLUEZ_MEDIA_ENDPOINT_INTERFACE ".Error.NotImplemented",
"Method not implemented"));
static const struct {
uint32_t rate;
uint8_t cap;
} freq_table[] = {
{ 16000U, SBC_SAMPLING_FREQ_16000 },
{ 32000U, SBC_SAMPLING_FREQ_32000 },
{ 44100U, SBC_SAMPLING_FREQ_44100 },
{ 48000U, SBC_SAMPLING_FREQ_48000 }
};
dbus_error_init(&err);
if (!dbus_message_get_args(m, &err, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &cap, &size, DBUS_TYPE_INVALID)) {
pa_log_error("Endpoint SelectConfiguration(): %s", err.message);
dbus_error_free(&err);
goto fail;
}
if (size != sizeof(config)) {
pa_log_error("Capabilities array has invalid size");
goto fail;
}
pa_zero(config);
/* Find the lowest freq that is at least as high as the requested sampling rate */
for (i = 0; (unsigned) i < PA_ELEMENTSOF(freq_table); i++)
if (freq_table[i].rate >= y->core->default_sample_spec.rate && (cap->frequency & freq_table[i].cap)) {
config.frequency = freq_table[i].cap;
break;
}
if ((unsigned) i == PA_ELEMENTSOF(freq_table)) {
for (--i; i >= 0; i--) {
if (cap->frequency & freq_table[i].cap) {
config.frequency = freq_table[i].cap;
break;
}
}
if (i < 0) {
pa_log_error("Not suitable sample rate");
goto fail;
}
}
pa_assert((unsigned) i < PA_ELEMENTSOF(freq_table));
if (y->core->default_sample_spec.channels <= 1) {
if (cap->channel_mode & SBC_CHANNEL_MODE_MONO)
config.channel_mode = SBC_CHANNEL_MODE_MONO;
else if (cap->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
config.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO;
else if (cap->channel_mode & SBC_CHANNEL_MODE_STEREO)
config.channel_mode = SBC_CHANNEL_MODE_STEREO;
else if (cap->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
config.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL;
else {
pa_log_error("No supported channel modes");
goto fail;
}
}
if (y->core->default_sample_spec.channels >= 2) {
if (cap->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
config.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO;
else if (cap->channel_mode & SBC_CHANNEL_MODE_STEREO)
config.channel_mode = SBC_CHANNEL_MODE_STEREO;
else if (cap->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
config.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL;
else if (cap->channel_mode & SBC_CHANNEL_MODE_MONO)
config.channel_mode = SBC_CHANNEL_MODE_MONO;
else {
pa_log_error("No supported channel modes");
goto fail;
}
}
if (cap->block_length & SBC_BLOCK_LENGTH_16)
config.block_length = SBC_BLOCK_LENGTH_16;
else if (cap->block_length & SBC_BLOCK_LENGTH_12)
config.block_length = SBC_BLOCK_LENGTH_12;
else if (cap->block_length & SBC_BLOCK_LENGTH_8)
config.block_length = SBC_BLOCK_LENGTH_8;
else if (cap->block_length & SBC_BLOCK_LENGTH_4)
config.block_length = SBC_BLOCK_LENGTH_4;
else {
pa_log_error("No supported block lengths");
goto fail;
}
if (cap->subbands & SBC_SUBBANDS_8)
config.subbands = SBC_SUBBANDS_8;
else if (cap->subbands & SBC_SUBBANDS_4)
config.subbands = SBC_SUBBANDS_4;
else {
pa_log_error("No supported subbands");
goto fail;
}
if (cap->allocation_method & SBC_ALLOCATION_LOUDNESS)
config.allocation_method = SBC_ALLOCATION_LOUDNESS;
else if (cap->allocation_method & SBC_ALLOCATION_SNR)
config.allocation_method = SBC_ALLOCATION_SNR;
config.min_bitpool = (uint8_t) PA_MAX(MIN_BITPOOL, cap->min_bitpool);
config.max_bitpool = (uint8_t) PA_MIN(a2dp_default_bitpool(config.frequency, config.channel_mode), cap->max_bitpool);
if (config.min_bitpool > config.max_bitpool)
goto fail;
pa_assert_se(r = dbus_message_new_method_return(m));
pa_assert_se(dbus_message_append_args(r, DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, &pconf, size, DBUS_TYPE_INVALID));
return r;
fail:
pa_assert_se(r = dbus_message_new_error(m, "org.bluez.Error.InvalidArguments", "Unable to select configuration"));
return r;
}