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Code Issues Releases Activity

atrac3: use separate pointers for each channel in decodeFrame()

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This commit is contained in:
Justin Ruggles 2011-10-28 13:29:41 -04:00
parent 5e76b8bb76
commit 6ba7f78bbb
1 changed files with 8 additions and 9 deletions
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17
libavcodec/atrac3.c
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@ -724,7 +724,7 @@ static int decodeChannelSoundUnit (ATRAC3Context *q, GetBitContext *gb, channel_
*/
static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf,
float *out_samples)
float **out_samples)
{
int result, i;
float *p1, *p2, *p3, *p4;
@ -736,7 +736,7 @@ static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf,
/* decode Sound Unit 1 */
init_get_bits(&q->gb,databuf,q->bits_per_frame);
result = decodeChannelSoundUnit(q,&q->gb, q->pUnits, out_samples, 0, JOINT_STEREO);
result = decodeChannelSoundUnit(q,&q->gb, q->pUnits, out_samples[0], 0, JOINT_STEREO);
if (result != 0)
return (result);
@ -777,14 +777,14 @@ static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf,
}
/* Decode Sound Unit 2. */
result = decodeChannelSoundUnit(q,&q->gb, &q->pUnits[1], &out_samples[1024], 1, JOINT_STEREO);
result = decodeChannelSoundUnit(q,&q->gb, &q->pUnits[1], out_samples[1], 1, JOINT_STEREO);
if (result != 0)
return (result);
/* Reconstruct the channel coefficients. */
reverseMatrixing(out_samples, &out_samples[1024], q->matrix_coeff_index_prev, q->matrix_coeff_index_now);
reverseMatrixing(out_samples[0], out_samples[1], q->matrix_coeff_index_prev, q->matrix_coeff_index_now);
channelWeighting(out_samples, &out_samples[1024], q->weighting_delay);
channelWeighting(out_samples[0], out_samples[1], q->weighting_delay);
} else {
/* normal stereo mode or mono */
@ -794,22 +794,21 @@ static int decodeFrame(ATRAC3Context *q, const uint8_t* databuf,
/* Set the bitstream reader at the start of a channel sound unit. */
init_get_bits(&q->gb, databuf+((i*q->bytes_per_frame)/q->channels), (q->bits_per_frame)/q->channels);
result = decodeChannelSoundUnit(q,&q->gb, &q->pUnits[i], &out_samples[i*1024], i, q->codingMode);
result = decodeChannelSoundUnit(q,&q->gb, &q->pUnits[i], out_samples[i], i, q->codingMode);
if (result != 0)
return (result);
}
}
/* Apply the iQMF synthesis filter. */
p1 = out_samples;
for (i=0 ; i<q->channels ; i++) {
p1 = out_samples[i];
p2= p1+256;
p3= p2+256;
p4= p3+256;
atrac_iqmf (p1, p2, 256, p1, q->pUnits[i].delayBuf1, q->tempBuf);
atrac_iqmf (p4, p3, 256, p3, q->pUnits[i].delayBuf2, q->tempBuf);
atrac_iqmf (p1, p3, 512, p1, q->pUnits[i].delayBuf3, q->tempBuf);
p1 +=1024;
}
return 0;
@ -847,7 +846,7 @@ static int atrac3_decode_frame(AVCodecContext *avctx,
databuf = buf;
}
result = decodeFrame(q, databuf, q->channels == 2 ? q->outSamples[0] : samples);
result = decodeFrame(q, databuf, q->channels == 2 ? q->outSamples : &samples);
if (result != 0) {
av_log(NULL,AV_LOG_ERROR,"Frame decoding error!\n");