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bluez5: add additional aac encoder options, and implement optional vbr

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This commit is contained in:
Pauli Virtanen 2021-03-26 18:39:03 +02:00 • committed by Wim Taymans
parent bd7dba617f
commit 54e06d9df0
2 changed files with 53 additions and 0 deletions
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49
spa/plugins/bluez5/a2dp-codec-aac.c
View file

@ -38,6 +38,10 @@
#define DEFAULT_AAC_BITRATE 320000
#define MIN_AAC_BITRATE 64000
struct props {
int bitratemode;
};
struct impl {
HANDLE_AACENCODER aacenc;
@ -233,12 +237,34 @@ static int codec_enum_config(const struct a2dp_codec *codec,
return *param == NULL ? -EIO : 1;
}
static void *codec_init_props(const struct a2dp_codec *codec, const struct spa_dict *settings)
{
struct props *p = calloc(1, sizeof(struct props));
const char *str;
if (p == NULL)
return NULL;
if (settings == NULL || (str = spa_dict_lookup(settings, "bluez5.a2dp.aac.bitratemode")) == NULL)
str = "0";
p->bitratemode = SPA_CLAMP(atoi(str), 0, 5);
return p;
}
static void codec_clear_props(void *props)
{
free(props);
}
static void *codec_init(const struct a2dp_codec *codec, uint32_t flags,
void *config, size_t config_len, const struct spa_audio_info *info,
void *props, size_t mtu)
{
struct impl *this;
a2dp_aac_t *conf = config;
struct props *p = props;
UINT bitratemode;
int res;
this = calloc(1, sizeof(struct impl));
@ -258,6 +284,8 @@ static void *codec_init(const struct a2dp_codec *codec, uint32_t flags,
}
this->samplesize = 2;
bitratemode = p ? p->bitratemode : 0;
res = aacEncOpen(&this->aacenc, 0, this->channels);
if (res != AACENC_OK)
goto error;
@ -279,6 +307,21 @@ static void *codec_init(const struct a2dp_codec *codec, uint32_t flags,
if (res != AACENC_OK)
goto error;
if (conf->vbr) {
res = aacEncoder_SetParam(this->aacenc, AACENC_BITRATEMODE,
bitratemode);
if (res != AACENC_OK)
goto error;
}
res = aacEncoder_SetParam(this->aacenc, AACENC_AUDIOMUXVER, 2);
if (res != AACENC_OK)
goto error;
res = aacEncoder_SetParam(this->aacenc, AACENC_SIGNALING_MODE, 1);
if (res != AACENC_OK)
goto error;
// Fragmentation is not implemented yet,
// so make sure every encoded AAC frame fits in (mtu - header)
this->max_bitrate = ((this->mtu - sizeof(struct rtp_header)) * 8 * this->rate) / 1024;
@ -297,6 +340,10 @@ static void *codec_init(const struct a2dp_codec *codec, uint32_t flags,
if (res != AACENC_OK)
goto error;
res = aacEncoder_SetParam(this->aacenc, AACENC_HEADER_PERIOD, 1);
if (res != AACENC_OK)
goto error;
res = aacEncoder_SetParam(this->aacenc, AACENC_AFTERBURNER, 1);
if (res != AACENC_OK)
goto error;
@ -446,6 +493,8 @@ const struct a2dp_codec a2dp_codec_aac = {
.fill_caps = codec_fill_caps,
.select_config = codec_select_config,
.enum_config = codec_enum_config,
.init_props = codec_init_props,
.clear_props = codec_clear_props,
.init = codec_init,
.deinit = codec_deinit,
.get_block_size = codec_get_block_size,

4
src/daemon/media-session.d/bluez-monitor.conf
View file

@ -55,6 +55,10 @@ rules = [
# sq (Standard Quality, 660/606kbps)
# mq (Mobile use Quality, 330/303kbps)
#bluez5.a2dp.ldac.quality = auto
# AAC variable bitrate mode
# Available values: 0 (cbr, default), 1-5 (quality level)
#bluez5.a2dp.aac.bitratemode = 0
}
}
}