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Merged Koen's encoder changes

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This commit is contained in:
Jean-Marc Valin 2011-02-01 10:35:23 -05:00
parent a70729c0b4
commit 2b68ea9a11
5 changed files with 191 additions and 88 deletions
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232
src/opus_encoder.c
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@ -46,7 +46,6 @@ OpusEncoder *opus_encoder_create(int Fs, int channels)
char *raw_state;
OpusEncoder *st;
int ret, silkEncSizeBytes, celtEncSizeBytes;
SKP_SILK_SDK_EncControlStruct encControl;
/* Create SILK encoder */
ret = SKP_Silk_SDK_Get_Encoder_Size( &silkEncSizeBytes );
@ -62,29 +61,35 @@ OpusEncoder *opus_encoder_create(int Fs, int channels)
st->Fs = Fs;
/*encControl.API_sampleRate = st->Fs;
encControl.packetLossPercentage = 0;
encControl.useInBandFEC = 0;
encControl.useDTX = 0;
encControl.complexity = 2;*/
ret = SKP_Silk_SDK_InitEncoder( st->silk_enc, &encControl );
ret = SKP_Silk_SDK_InitEncoder( st->silk_enc, &st->silk_mode );
if( ret ) {
/* Handle error */
}
/* default SILK parameters */
st->silk_mode.API_sampleRate = st->Fs;
st->silk_mode.maxInternalSampleRate = 16000;
st->silk_mode.minInternalSampleRate = 8000;
st->silk_mode.payloadSize_ms = 20;
st->silk_mode.packetLossPercentage = 0;
st->silk_mode.useInBandFEC = 0;
st->silk_mode.useDTX = 0;
st->silk_mode.complexity = 2;
/* Create CELT encoder */
/* Initialize CELT encoder */
st->celt_enc = celt_encoder_init(st->celt_enc, Fs, channels, NULL);
st->mode = MODE_HYBRID;
st->bandwidth = BANDWIDTH_FULLBAND;
st->vbr_rate = 0;
st->use_vbr = 0;
st->bitrate_bps = 32000;
return st;
}
int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
unsigned char *data, int bytes_per_packet)
unsigned char *data, int max_data_bytes)
{
int i;
int ret=0;
@ -93,64 +98,64 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
ec_byte_buffer buf;
SKP_SILK_SDK_EncControlStruct encControl;
int framerate, period;
int silk_internal_bandwidth;
int bytes_target;
bytes_target = st->bitrate_bps * frame_size / (st->Fs * 8) - 1;
bytes_per_packet -= 1;
data += 1;
ec_byte_writeinit_buffer(&buf, data, bytes_per_packet);
ec_byte_writeinit_buffer(&buf, data, max_data_bytes-1);
ec_enc_init(&enc,&buf);
if (st->mode != MODE_CELT_ONLY)
{
/* Set Encoder parameters */
encControl.API_sampleRate = st->Fs;
encControl.packetLossPercentage = 2;
encControl.useInBandFEC = 0;
encControl.useDTX = 0;
encControl.complexity = 2;
/* SILK processing */
if (st->mode != MODE_CELT_ONLY)
{
st->silk_mode.bitRate = st->bitrate_bps - 8*st->Fs/frame_size;
if( st->mode == MODE_HYBRID ) {
/* FIXME: Tune this offset */
st->silk_mode.bitRate = (st->silk_mode.bitRate + 12000) / 2;
/* FIXME: Adjust for 10 ms frames */
}
if (st->vbr_rate != 0)
encControl.bitRate = (st->vbr_rate+6000)/2;
else {
encControl.bitRate = (bytes_per_packet*8*(celt_int32)st->Fs/frame_size+6000)/2;
if (st->Fs == 100 * frame_size)
encControl.bitRate -= 5000;
}
encControl.payloadSize_ms = 1000 * frame_size / st->Fs;
st->silk_mode.payloadSize_ms = 1000 * frame_size / st->Fs;
if (st->bandwidth == BANDWIDTH_NARROWBAND) {
st->silk_mode.maxInternalSampleRate = 8000;
} else if (st->bandwidth == BANDWIDTH_MEDIUMBAND) {
st->silk_mode.maxInternalSampleRate = 12000;
} else {
SKP_assert( st->mode == MODE_HYBRID || st->bandwidth == BANDWIDTH_WIDEBAND );
st->silk_mode.maxInternalSampleRate = 16000;
}
if( st->mode == MODE_HYBRID ) {
/* Don't allow bandwidth reduction at lowest bitrates in hybrid mode */
st->silk_mode.minInternalSampleRate = st->silk_mode.maxInternalSampleRate ;
}
if (st->mode == MODE_HYBRID)
encControl.minInternalSampleRate = 16000;
else
encControl.minInternalSampleRate = 8000;
/* Call SILK encoder for the low band */
nBytes = max_data_bytes-1;
ret = SKP_Silk_SDK_Encode( st->silk_enc, &st->silk_mode, pcm, frame_size, &enc, &nBytes );
if( ret ) {
fprintf (stderr, "SILK encode error: %d\n", ret);
/* Handle error */
}
/* Extract SILK internal bandwidth for signaling in first byte */
if( st->mode == MODE_SILK_ONLY ) {
if( st->silk_mode.internalSampleRate == 8000 ) {
silk_internal_bandwidth = BANDWIDTH_NARROWBAND;
} else if( st->silk_mode.internalSampleRate == 12000 ) {
silk_internal_bandwidth = BANDWIDTH_MEDIUMBAND;
} else if( st->silk_mode.internalSampleRate == 16000 ) {
silk_internal_bandwidth = BANDWIDTH_WIDEBAND;
}
}
}
if (st->bandwidth == BANDWIDTH_NARROWBAND)
encControl.maxInternalSampleRate = 8000;
else if (st->bandwidth == BANDWIDTH_MEDIUMBAND)
encControl.maxInternalSampleRate = 12000;
else
encControl.maxInternalSampleRate = 16000;
/* Call SILK encoder for the low band */
nBytes = bytes_per_packet;
ret = SKP_Silk_SDK_Encode( st->silk_enc, &encControl, pcm, frame_size, &enc, &nBytes );
if( ret ) {
fprintf (stderr, "SILK encode error %d\n", ret);
/* Handle error */
}
ret = (ec_enc_tell(&enc, 0)+7)>>3;
}
if (st->mode == MODE_HYBRID)
{
/* This should be adjusted based on the SILK bandwidth */
celt_encoder_ctl(st->celt_enc, CELT_SET_START_BAND(17));
} else {
celt_encoder_ctl(st->celt_enc, CELT_SET_START_BAND(0));
}
if (st->mode != MODE_SILK_ONLY && st->bandwidth > BANDWIDTH_WIDEBAND)
/* CELT processing */
if (st->mode != MODE_SILK_ONLY)
{
int endband;
short pcm_buf[960*2];
int nb_compr_bytes;
switch(st->bandwidth)
{
@ -170,28 +175,37 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
celt_encoder_ctl(st->celt_enc, CELT_SET_END_BAND(endband));
celt_encoder_ctl(st->celt_enc, CELT_SET_CHANNELS(st->stream_channels));
if (st->mode == MODE_HYBRID)
{
int len;
celt_encoder_ctl(st->celt_enc, CELT_SET_START_BAND(17));
len = (ec_enc_tell(&enc, 0)+7)>>3;
if( st->use_vbr ) {
nb_compr_bytes = len + (st->bitrate_bps - 12000) * frame_size / (2 * 8 * st->Fs);
} else {
/* check if SILK used up too much */
nb_compr_bytes = len > bytes_target ? len : bytes_target;
}
} else {
celt_encoder_ctl(st->celt_enc, CELT_SET_START_BAND(0));
nb_compr_bytes = bytes_target;
}
for (i=0;i<ENCODER_DELAY_COMPENSATION*st->channels;i++)
pcm_buf[i] = st->delay_buffer[i];
for (;i<frame_size*st->channels;i++)
pcm_buf[i] = pcm[i-ENCODER_DELAY_COMPENSATION*st->channels];
celt_encoder_ctl(st->celt_enc, CELT_SET_PREDICTION(1));
ec_byte_shrink(&buf, nb_compr_bytes);
if (st->vbr_rate != 0)
{
int tmp;
tmp = (st->mode == MODE_HYBRID) ? (st->vbr_rate-6000)/2 : st->vbr_rate;
tmp = ((ec_enc_tell(&enc, 0)+4)>>3) + tmp * frame_size/(8*st->Fs);
if (tmp <= bytes_per_packet)
bytes_per_packet = tmp;
ec_byte_shrink(&buf, bytes_per_packet);
}
/* Encode high band with CELT */
ret = celt_encode_with_ec(st->celt_enc, pcm_buf, frame_size, NULL, bytes_per_packet, &enc);
ret = celt_encode_with_ec(st->celt_enc, pcm_buf, frame_size, NULL, nb_compr_bytes, &enc);
for (i=0;i<ENCODER_DELAY_COMPENSATION*st->channels;i++)
st->delay_buffer[i] = pcm[frame_size*st->channels-ENCODER_DELAY_COMPENSATION*st->channels+i];
} else {
ret = (ec_enc_tell(&enc, 0)+7)>>3;
ec_enc_done(&enc);
}
@ -206,7 +220,7 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
}
if (st->mode == MODE_SILK_ONLY)
{
data[0] = (st->bandwidth-BANDWIDTH_NARROWBAND)<<5;
data[0] = (silk_internal_bandwidth-BANDWIDTH_NARROWBAND)<<5;
data[0] |= (period-2)<<3;
} else if (st->mode == MODE_CELT_ONLY)
{
@ -216,7 +230,7 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
data[0] = 0x80;
data[0] |= tmp << 5;
data[0] |= period<<3;
} else /* Opus */
} else /* Hybrid */
{
data[0] = 0x60;
data[0] |= (st->bandwidth-BANDWIDTH_SUPERWIDEBAND)<<4;
@ -248,10 +262,29 @@ void opus_encoder_ctl(OpusEncoder *st, int request, ...)
*value = st->mode;
}
break;
case OPUS_SET_BITRATE_REQUEST:
{
int value = va_arg(ap, int);
st->bitrate_bps = value;
}
break;
case OPUS_GET_BITRATE_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->bitrate_bps;
}
break;
case OPUS_SET_BANDWIDTH_REQUEST:
{
int value = va_arg(ap, int);
st->bandwidth = value;
if (st->bandwidth == BANDWIDTH_NARROWBAND) {
st->silk_mode.maxInternalSampleRate = 8000;
} else if (st->bandwidth == BANDWIDTH_MEDIUMBAND) {
st->silk_mode.maxInternalSampleRate = 12000;
} else {
st->silk_mode.maxInternalSampleRate = 16000;
}
}
break;
case OPUS_GET_BANDWIDTH_REQUEST:
@ -260,16 +293,65 @@ void opus_encoder_ctl(OpusEncoder *st, int request, ...)
*value = st->bandwidth;
}
break;
case OPUS_SET_VBR_RATE_REQUEST:
case OPUS_SET_DTX_FLAG_REQUEST:
{
int value = va_arg(ap, int);
st->vbr_rate = value;
st->silk_mode.useDTX = value;
}
break;
case OPUS_GET_VBR_RATE_REQUEST:
case OPUS_GET_DTX_FLAG_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->vbr_rate;
*value = st->silk_mode.useDTX;
}
break;
case OPUS_SET_COMPLEXITY_REQUEST:
{
int value = va_arg(ap, int);
st->silk_mode.complexity = value;
}
break;
case OPUS_GET_COMPLEXITY_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->silk_mode.complexity;
}
break;
case OPUS_SET_INBAND_FEC_FLAG_REQUEST:
{
int value = va_arg(ap, int);
st->silk_mode.useInBandFEC = value;
}
break;
case OPUS_GET_INBAND_FEC_FLAG_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->silk_mode.useInBandFEC;
}
break;
case OPUS_SET_PACKET_LOSS_PERC_REQUEST:
{
int value = va_arg(ap, int);
st->silk_mode.packetLossPercentage = value;
}
break;
case OPUS_GET_PACKET_LOSS_PERC_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->silk_mode.packetLossPercentage;
}
break;
case OPUS_SET_VBR_FLAG_REQUEST:
{
int value = va_arg(ap, int);
st->use_vbr = value;
st->silk_mode.useCBR = 1-value;
}
break;
case OPUS_GET_VBR_FLAG_REQUEST:
{
int *value = va_arg(ap, int*);
*value = st->use_vbr;
}
break;
default: