eden-emu/opus
19
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add OPUS_{GET|SET}_GAIN CTLs for adjusting output gain.

Browse source 
This CTL was requested by Nicolas George for FFmpeg.
This commit is contained in:
Gregory Maxwell 2012-07-11 00:04:24 -04:00
parent c329045758
commit 28b41ae5ae
7 changed files with 193 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/opus_decoder.c
View file

@ -45,6 +45,7 @@
#include "os_support.h"
#include "structs.h"
#include "define.h"
#include "mathops.h"
struct OpusDecoder {
int celt_dec_offset;
@ -62,6 +63,7 @@ struct OpusDecoder {
int prev_mode;
int frame_size;
int prev_redundancy;
int decode_gain;
opus_uint32 rangeFinal;
};
@ -503,6 +505,18 @@ static int opus_decode_frame(OpusDecoder *st, const unsigned char *data,
}
}
if(st->decode_gain)
{
opus_val32 gain;
gain = celt_exp2(MULT16_16_P15(QCONST16(6.48814081e-4f, 25), st->decode_gain));
for (i=0;i<frame_size*st->channels;i++)
{
opus_val32 x;
x = MULT16_32_P16(pcm[i],gain);
pcm[i] = SATURATE(x, 32767);
}
}
if (len <= 1)
st->rangeFinal = 0;
else
@ -856,6 +870,28 @@ int opus_decoder_ctl(OpusDecoder *st, int request, ...)
*value = st->DecControl.prevPitchLag;
}
break;
case OPUS_GET_GAIN_REQUEST:
{
opus_int32 *value = va_arg(ap, opus_int32*);
if (value==NULL)
{
ret = OPUS_BAD_ARG;
break;
}
*value = st->decode_gain;
}
break;
case OPUS_SET_GAIN_REQUEST:
{
opus_int32 value = va_arg(ap, opus_int32);
if (value<-32768 || value>32767)
{
ret = OPUS_BAD_ARG;
break;
}
st->decode_gain = value;
}
break;
default:
/*fprintf(stderr, "unknown opus_decoder_ctl() request: %d", request);*/
ret = OPUS_UNIMPLEMENTED;