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avcodec/wmaprodec: unbreak XMA mono decoding 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-01-20 13:47:44 +01:00
parent cab0f3abc5
commit 96fe4432f5
1 changed files with 9 additions and 6 deletions
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15
libavcodec/wmaprodec.c
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@ -1755,8 +1755,9 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
if (got_stream_frame_ptr) {
memcpy(&s->samples[s->current_stream * 2 + 0][s->offset[s->current_stream] * 512],
s->frames[s->current_stream]->extended_data[0], 512 * 4);
memcpy(&s->samples[s->current_stream * 2 + 1][s->offset[s->current_stream] * 512],
s->frames[s->current_stream]->extended_data[1], 512 * 4);
if (avctx->channels > 1)
memcpy(&s->samples[s->current_stream * 2 + 1][s->offset[s->current_stream] * 512],
s->frames[s->current_stream]->extended_data[1], 512 * 4);
s->offset[s->current_stream]++;
}
@ -1794,7 +1795,7 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
s->xma[i].skip_packets = FFMAX(0, s->xma[i].skip_packets - 1);
}
for (i = 0; i < avctx->channels / 2; i++) {
for (i = 0; i < (avctx->channels + 1) / 2; i++) {
offset = FFMIN(offset, s->offset[i]);
}
@ -1803,13 +1804,15 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
if ((bret = ff_get_buffer(avctx, frame, 0)) < 0)
return bret;
for (i = 0; i < avctx->channels / 2; i++) {
for (i = 0; i < (avctx->channels + 1) / 2; i++) {
memcpy(frame->extended_data[i * 2 + 0], s->samples[i * 2 + 0], frame->nb_samples * 4);
memcpy(frame->extended_data[i * 2 + 1], s->samples[i * 2 + 1], frame->nb_samples * 4);
if (avctx->channels > 1)
memcpy(frame->extended_data[i * 2 + 1], s->samples[i * 2 + 1], frame->nb_samples * 4);
s->offset[i] -= offset;
if (s->offset[i]) {
memmove(s->samples[i * 2 + 0], s->samples[i * 2 + 0] + frame->nb_samples, s->offset[i] * 4 * 512);
memmove(s->samples[i * 2 + 1], s->samples[i * 2 + 1] + frame->nb_samples, s->offset[i] * 4 * 512);
if (avctx->channels > 1)
memmove(s->samples[i * 2 + 1], s->samples[i * 2 + 1] + frame->nb_samples, s->offset[i] * 4 * 512);
}
}