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Automatic bandwidth selection

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This commit is contained in:
Jean-Marc Valin 2011-03-08 22:12:43 -05:00
parent a3ef43818d
commit 955f94c21a
5 changed files with 34 additions and 36 deletions
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15
src/opus.h
View file

@ -71,11 +71,12 @@ extern "C" {
#define MODE_HYBRID 1001
#define MODE_CELT_ONLY 1002
#define BANDWIDTH_NARROWBAND 1100
#define BANDWIDTH_MEDIUMBAND 1101
#define BANDWIDTH_WIDEBAND 1102
#define BANDWIDTH_SUPERWIDEBAND 1103
#define BANDWIDTH_FULLBAND 1104
#define BANDWIDTH_AUTO 1100
#define BANDWIDTH_NARROWBAND 1101
#define BANDWIDTH_MEDIUMBAND 1102
#define BANDWIDTH_WIDEBAND 1103
#define BANDWIDTH_SUPERWIDEBAND 1104
#define BANDWIDTH_FULLBAND 1105
@ -135,7 +136,7 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
void opus_encoder_destroy(OpusEncoder *st);
void opus_encoder_ctl(OpusEncoder *st, int request, ...);
int opus_encoder_ctl(OpusEncoder *st, int request, ...);
OpusDecoder *opus_decoder_create(int Fs, int channels);
@ -143,7 +144,7 @@ OpusDecoder *opus_decoder_create(int Fs, int channels);
int opus_decode(OpusDecoder *st, const unsigned char *data, int len,
short *pcm, int frame_size, int decode_fec);
void opus_decoder_ctl(OpusDecoder *st, int request, ...);
int opus_decoder_ctl(OpusDecoder *st, int request, ...);
void opus_decoder_destroy(OpusDecoder *st);

2
src/opus_decoder.c
View file

@ -325,7 +325,7 @@ int opus_decode(OpusDecoder *st, const unsigned char *data,
}
void opus_decoder_ctl(OpusDecoder *st, int request, ...)
int opus_decoder_ctl(OpusDecoder *st, int request, ...)
{
va_list ap;

24
src/opus_encoder.c
View file

@ -82,6 +82,7 @@ OpusEncoder *opus_encoder_create(int Fs, int channels)
st->use_vbr = 0;
st->bitrate_bps = 32000;
st->user_mode = OPUS_MODE_AUTO;
st->user_bandwidth = BANDWIDTH_AUTO;
st->voice_ratio = 90;
st->encoder_buffer = st->Fs/100;
@ -178,6 +179,19 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
else
st->bandwidth = BANDWIDTH_NARROWBAND;
}
if (st->Fs <= 24000 && st->bandwidth > BANDWIDTH_SUPERWIDEBAND)
st->bandwidth = BANDWIDTH_SUPERWIDEBAND;
if (st->Fs <= 16000 && st->bandwidth > BANDWIDTH_WIDEBAND)
st->bandwidth = BANDWIDTH_WIDEBAND;
if (st->Fs <= 12000 && st->bandwidth > BANDWIDTH_MEDIUMBAND)
st->bandwidth = BANDWIDTH_MEDIUMBAND;
if (st->Fs <= 8000 && st->bandwidth > BANDWIDTH_NARROWBAND)
st->bandwidth = BANDWIDTH_NARROWBAND;
if (st->user_bandwidth != BANDWIDTH_AUTO)
st->bandwidth = st->user_bandwidth;
/* Preventing non-sensical configurations */
if (frame_size < st->Fs/100 && st->mode != MODE_CELT_ONLY)
st->mode = MODE_CELT_ONLY;
@ -471,7 +485,7 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
return ret+1+redundancy_bytes;
}
void opus_encoder_ctl(OpusEncoder *st, int request, ...)
int opus_encoder_ctl(OpusEncoder *st, int request, ...)
{
va_list ap;
@ -488,7 +502,7 @@ void opus_encoder_ctl(OpusEncoder *st, int request, ...)
case OPUS_GET_MODE_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->user_mode;
*value = st->mode;
}
break;
case OPUS_SET_BITRATE_REQUEST:
@ -506,8 +520,10 @@ void opus_encoder_ctl(OpusEncoder *st, int request, ...)
case OPUS_SET_BANDWIDTH_REQUEST:
{
int value = va_arg(ap, int);
st->bandwidth = value;
if (st->bandwidth == BANDWIDTH_NARROWBAND) {
if (value < BANDWIDTH_AUTO || value > BANDWIDTH_FULLBAND)
return OPUS_BAD_ARG;
st->user_bandwidth = value;
if (st->user_bandwidth == BANDWIDTH_NARROWBAND) {
st->silk_mode.maxInternalSampleRate = 8000;
} else if (st->bandwidth == BANDWIDTH_MEDIUMBAND) {
st->silk_mode.maxInternalSampleRate = 12000;

1
src/opus_encoder.h
View file

@ -46,6 +46,7 @@ struct OpusEncoder {
int user_mode;
int prev_mode;
int bandwidth;
int user_bandwidth;
int voice_ratio;
/* Sampling rate (at the API level) */
int Fs;

28
src/test_opus.c
View file

@ -112,7 +112,7 @@ int main(int argc, char *argv[])
/* defaults: */
use_vbr = 1;
bandwidth=-1;
bandwidth=BANDWIDTH_AUTO;
internal_sampling_rate_Hz = sampling_rate;
max_payload_bytes = MAX_PACKET;
complexity = 10;
@ -120,24 +120,6 @@ int main(int argc, char *argv[])
use_dtx = 0;
packet_loss_perc = 0;
switch(sampling_rate)
{
case 8000:
bandwidth = BANDWIDTH_NARROWBAND;
break;
case 12000:
bandwidth = BANDWIDTH_MEDIUMBAND;
break;
case 16000:
bandwidth = BANDWIDTH_WIDEBAND;
break;
case 24000:
bandwidth = BANDWIDTH_SUPERWIDEBAND;
break;
case 48000:
bandwidth = BANDWIDTH_FULLBAND;
break;
}
args = 5;
while( args < argc - 2 ) {
/* process command line options */
@ -236,11 +218,6 @@ int main(int argc, char *argv[])
enc = opus_encoder_create(sampling_rate, channels);
dec = opus_decoder_create(sampling_rate, channels);
if (bandwidth == -1)
{
fprintf (stderr, "Please specify a bandwidth when the sampling rate does not match one exactly\n");
return 1;
}
opus_encoder_ctl(enc, OPUS_SET_MODE(mode));
opus_encoder_ctl(enc, OPUS_SET_BITRATE(bitrate_bps));
opus_encoder_ctl(enc, OPUS_SET_BANDWIDTH(bandwidth));
@ -272,6 +249,9 @@ int main(int argc, char *argv[])
case BANDWIDTH_FULLBAND:
bandwidth_string = "fullband";
break;
case BANDWIDTH_AUTO:
bandwidth_string = "auto";
break;
default:
bandwidth_string = "unknown";
}