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Taking loss rate into account in compute_equiv_rate()

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Jean-Marc Valin 2016-06-20 18:54:06 -04:00
parent 7780d4a6b1
commit 099fc05ebf
1 changed files with 8 additions and 5 deletions
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13
src/opus_encoder.c
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@ -989,9 +989,9 @@ static int compute_silk_rate_for_hybrid(int rate, int bandwidth, int frame20ms,
/* Returns the equivalent bitrate corresponding to 20 ms frames,
complexity 10 VBR operation. */
static opus_int32 compute_equiv_rate(opus_int32 bitrate, int channels,
int frame_rate, int vbr, int mode, int complexity)
int frame_rate, int vbr, int mode, int complexity, int loss)
{
int equiv;
opus_int32 equiv;
equiv = bitrate;
/* Take into account overhead from smaller frames. */
equiv -= (40*channels+20)*(frame_rate - 50);
@ -1006,6 +1006,7 @@ static opus_int32 compute_equiv_rate(opus_int32 bitrate, int channels,
costs about 20%. */
if (complexity<2)
equiv = equiv*4/5;
equiv -= equiv*loss/(6*loss + 10);
} else if (mode == MODE_CELT_ONLY) {
/* CELT complexity 0-4 doesn't have the pitch filter, which costs
about 10%. */
@ -1013,6 +1014,8 @@ static opus_int32 compute_equiv_rate(opus_int32 bitrate, int channels,
equiv = equiv*9/10;
} else {
/* Mode not known yet */
/* Half the SILK loss*/
equiv -= equiv*loss/(12*loss + 20);
}
return equiv;
}
@ -1282,7 +1285,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
/* Equivalent 20-ms rate for mode/channel/bandwidth decisions */
equiv_rate = compute_equiv_rate(st->bitrate_bps, st->channels, st->Fs/frame_size,
st->use_vbr, 0, st->silk_mode.complexity);
st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
if (st->signal_type == OPUS_SIGNAL_VOICE)
voice_est = 127;
@ -1325,7 +1328,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
}
/* Update equivalent rate for channels decision. */
equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size,
st->use_vbr, 0, st->silk_mode.complexity);
st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
/* Mode selection depending on application and signal type */
if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY)
@ -1425,7 +1428,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
/* Update equivalent rate with mode decision. */
equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size,
st->use_vbr, st->mode, st->silk_mode.complexity);
st->use_vbr, st->mode, st->silk_mode.complexity, st->silk_mode.packetLossPercentage);
/* For the first frame at a new SILK bandwidth */
if (st->silk_bw_switch)