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avcodec/adpcm: fix decoding of stereo non 4-bit ADPCM IMA WAV 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-05-04 11:33:34 +02:00
parent 3395ad48fa
commit 66eb5b809a
1 changed files with 11 additions and 3 deletions
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14
libavcodec/adpcm.c
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@ -783,15 +783,23 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
if (avctx->bits_per_coded_sample != 4) {
int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
uint8_t temp[20] = { 0 };
GetBitContext g;
ret = init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb));
if (ret < 0)
return ret;
for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
for (i = 0; i < avctx->channels; i++) {
int j;
cs = &c->status[i];
samples = &samples_p[i][1 + n * samples_per_block];
for (j = 0; j < block_size; j++) {
temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
(j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
}
ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
if (ret < 0)
return ret;
for (m = 0; m < samples_per_block; m++) {
samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
avctx->bits_per_coded_sample);