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Do not invert samples when encoding Vorbis. 

Patch by Frank Barchard, fbarchard google

Originally committed as revision 23329 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Frank Barchard 2010-05-25 22:53:22 +00:00 committed by Carl Eugen Hoyos
parent f4348e6cce
commit 344f5c9fb3
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vorbis_enc.c
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@ -915,7 +915,7 @@ static int apply_window_and_mdct(vorbis_enc_context *venc, signed short *audio,
float * offset = venc->samples + channel*window_len*2 + window_len; float * offset = venc->samples + channel*window_len*2 + window_len;
j = channel; j = channel;
for (i = 0; i < samples; i++, j += venc->channels) for (i = 0; i < samples; i++, j += venc->channels)
offset[i] = -audio[j] / 32768. / n * win[window_len - i - 1]; //FIXME find out why the sign has to be fliped offset[i] = audio[j] / 32768. / n * win[window_len - i - 1];
} }
} else { } else {
for (channel = 0; channel < venc->channels; channel++) for (channel = 0; channel < venc->channels; channel++)
@ -932,7 +932,7 @@ static int apply_window_and_mdct(vorbis_enc_context *venc, signed short *audio,
float *offset = venc->saved + channel * window_len; float *offset = venc->saved + channel * window_len;
j = channel; j = channel;
for (i = 0; i < samples; i++, j += venc->channels) for (i = 0; i < samples; i++, j += venc->channels)
offset[i] = -audio[j] / 32768. / n * win[i]; //FIXME find out why the sign has to be fliped offset[i] = audio[j] / 32768. / n * win[i];
} }
venc->have_saved = 1; venc->have_saved = 1;
} else { } else {