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| author | Oded Shimon <ods15@ods15.dyndns.org> | 2006-10-02 05:56:40 +0000 |
|---|---|---|
| committer | Oded Shimon <ods15@ods15.dyndns.org> | 2006-10-02 05:56:40 +0000 |
| commit | 227878354730ce79d76408db8e97145bea4d5b89 (patch) | |
| tree | f5e0b62a84c25c1ccbf3047587963d0e6730891c | |
| parent | f4e5e657b81fd39fc2ca9b24a03d2353bdcba3b1 (diff) | |
| download | ffmpeg-227878354730ce79d76408db8e97145bea4d5b89.tar.gz | |
Original Commit: r46 | ods15 | 2006-09-23 11:36:32 +0300 (Sat, 23 Sep 2006) | 2 lines
fix normalization, output is (roughly?) same volume as input
Originally committed as revision 6453 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/vorbis_enc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/libavcodec/vorbis_enc.c b/libavcodec/vorbis_enc.c index 7f918e6409..bbf4d08bd1 100644 --- a/libavcodec/vorbis_enc.c +++ b/libavcodec/vorbis_enc.c @@ -617,6 +617,7 @@ static int window(venc_context_t * venc, signed short * audio, int samples) { int i, j, channel; const float * win = venc->win[0]; int window_len = 1 << (venc->blocksize[0] - 1); + float n = (float)(1 << venc->blocksize[0]) / 4.; // FIXME use dsp if (!venc->have_saved && !samples) return 0; @@ -636,7 +637,7 @@ static int window(venc_context_t * venc, signed short * audio, int samples) { float * offset = venc->samples + channel*window_len*2 + window_len; j = channel; for (i = 0; i < samples; i++, j += venc->channels) - offset[i] = audio[j] / 32768. * win[window_len - i]; + offset[i] = audio[j] / 32768. * win[window_len - i] / n; } } else { for (channel = 0; channel < venc->channels; channel++) { @@ -653,7 +654,7 @@ static int window(venc_context_t * venc, signed short * audio, int samples) { float * offset = venc->saved + channel*window_len; j = channel; for (i = 0; i < samples; i++, j += venc->channels) - offset[i] = audio[j] / 32768. * win[i]; + offset[i] = audio[j] / 32768. * win[i] / n; } venc->have_saved = 1; } else { @@ -759,7 +760,7 @@ static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * pack } for (j = 0; j < samples; j++) { - venc->floor[i * samples + j] = floor1_inverse_db_table[220]; + venc->floor[i * samples + j] = floor1_inverse_db_table[113]; } } |