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Use floating point mathematics when encoding mpeg audio.

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Fixes issue 975: high db peak levels when encoding mp2

Original patch by Lasse Reinhold, lassemikkelreinhold hotmail

Originally committed as revision 20100 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Lasse Reinhold
2009-09-30 15:13:09 +00:00
committed by Carl Eugen Hoyos
parent 5dd76bd741
commit 391dbb54a6
3 changed files with 9 additions and 9 deletions
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2
libavcodec/mpegaudioenc.c
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@@ -59,7 +59,7 @@ typedef struct MpegAudioContext {
} MpegAudioContext;
/* define it to use floats in quantization (I don't like floats !) */
//#define USE_FLOATS
#define USE_FLOATS
#include "mpegaudiodata.h"
#include "mpegaudiotab.h"

8
tests/rotozoom.regression.ref
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@@ -182,11 +182,11 @@ stddev: 3.23 PSNR: 37.92 bytes: 7603200/ 7603200
12368953 ./tests/data/a-flashsv.flv
592b3321994e26a990deb3a0a1415de9 *./tests/data/flashsv.rotozoom.out.yuv
stddev: 0.65 PSNR: 51.83 bytes: 7603200/ 7603200
28fbc7485c7939f40368f79adccb3e3d *./tests/data/a-mp2.mp2
f6eb0a205350bbd7fb1028a01c7ae8aa *./tests/data/a-mp2.mp2
96130 ./tests/data/a-mp2.mp2
c02d5b881c424498457298739f168368 *./tests/data/mp2.rotozoom.out.wav
stddev: 9315.45 PSNR: 16.94 bytes: 1059884/ 1058444
stddev: 4385.18 PSNR: 23.48 bytes: 1057960/ 1058444
74c7b6b15a001add199619fafe4059a1 *./tests/data/mp2.rotozoom.out.wav
stddev: 9315.80 PSNR: 16.93 bytes: 1059884/ 1058444
stddev: 4385.25 PSNR: 23.48 bytes: 1057960/ 1058444
081bfd5e683b13cccf1b07c43c1c5005 *./tests/data/a-ac3.rm
98751 ./tests/data/a-ac3.rm
5d8cce28f83dd33c3c7eaf43a5db5294 *./tests/data/a-g726.wav

8
tests/vsynth.regression.ref
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@@ -182,11 +182,11 @@ stddev: 9.58 PSNR: 28.49 bytes: 7603200/ 7603200
14681925 ./tests/data/a-flashsv.flv
947cb24ec45a453348ae6fe3fa278071 *./tests/data/flashsv.vsynth.out.yuv
stddev: 2.85 PSNR: 39.02 bytes: 7603200/ 7603200
28fbc7485c7939f40368f79adccb3e3d *./tests/data/a-mp2.mp2
f6eb0a205350bbd7fb1028a01c7ae8aa *./tests/data/a-mp2.mp2
96130 ./tests/data/a-mp2.mp2
c02d5b881c424498457298739f168368 *./tests/data/mp2.vsynth.out.wav
stddev: 9315.45 PSNR: 16.94 bytes: 1059884/ 1058444
stddev: 4385.18 PSNR: 23.48 bytes: 1057960/ 1058444
74c7b6b15a001add199619fafe4059a1 *./tests/data/mp2.vsynth.out.wav
stddev: 9315.80 PSNR: 16.93 bytes: 1059884/ 1058444
stddev: 4385.25 PSNR: 23.48 bytes: 1057960/ 1058444
081bfd5e683b13cccf1b07c43c1c5005 *./tests/data/a-ac3.rm
98751 ./tests/data/a-ac3.rm
5d8cce28f83dd33c3c7eaf43a5db5294 *./tests/data/a-g726.wav