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Original Commit: r90 | ods15 | 2006-09-29 22:14:40 +0300 (Fri, 29 Sep 2006) | 3 lines

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much better magic for floor, the first psychoacoustic in this encoder!
now creates valid, 175kbps audio, which sounds good! :)

Originally committed as revision 6494 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon
2006-10-02 06:08:55 +00:00
parent 9b9941bee6
commit 68e75e4dec
1 changed files with 1 additions and 3 deletions
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4
libavcodec/vorbis_enc.c
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@ -780,13 +780,11 @@ static void floor_fit(venc_context_t * venc, floor_t * fc, float * coeffs, int *
int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x; int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x;
int j; int j;
float average = 0; float average = 0;
begin = (position + begin) / 2;
end = (position + end ) / 2;
assert(end <= samples); assert(end <= samples);
for (j = begin; j < end; j++) average += fabs(coeffs[j]); for (j = begin; j < end; j++) average += fabs(coeffs[j]);
average /= end - begin; average /= end - begin;
average /= 32; // MAGIC! average /= pow(4, 1 - position/400.); // MAGIC!
for (j = 0; j < range - 1; j++) if (floor1_inverse_db_table[j * fc->multiplier] > average) break; for (j = 0; j < range - 1; j++) if (floor1_inverse_db_table[j * fc->multiplier] > average) break;
posts[fc->list[i].sort] = j; posts[fc->list[i].sort] = j;
} }