RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-29 10:52:20 +00:00
Code Issues Projects Releases Wiki Activity

atrac1: decode mono audio directly to output buffer

Browse Source 
For stereo we need to use intermediate planar buffers, but mono does not need
to be deinterleaved so the output buffer can be used directly.
This commit is contained in:
Justin Ruggles 2011-10-14 00:22:01 -04:00
parent 33684b9c12
commit 9a35ff3841
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
libavcodec/atrac1.c
View File

@ -310,15 +310,11 @@ static int atrac1_decode_frame(AVCodecContext *avctx, void *data,
ret = at1_imdct_block(su, q); ret = at1_imdct_block(su, q);
if (ret < 0) if (ret < 0)
return ret; return ret;
at1_subband_synthesis(q, su, q->out_samples[ch]); at1_subband_synthesis(q, su, q->channels == 1 ? samples : q->out_samples[ch]);
} }
/* interleave; FIXME, should create/use a DSP function */ /* interleave; FIXME, should create/use a DSP function */
if (q->channels == 1) { if (q->channels == 2) {
/* mono */
memcpy(samples, q->out_samples[0], AT1_SU_SAMPLES * 4);
} else {
/* stereo */
for (i = 0; i < AT1_SU_SAMPLES; i++) { for (i = 0; i < AT1_SU_SAMPLES; i++) {
samples[i * 2] = q->out_samples[0][i]; samples[i * 2] = q->out_samples[0][i];
samples[i * 2 + 1] = q->out_samples[1][i]; samples[i * 2 + 1] = q->out_samples[1][i];