flacenc - rice param search patch by (Justin Ruggles jruggle earthlink net

1) search for optimal rice parameters and partition order. i also modified the stereo method estimation to use this to calculate estimated bit count instead of using just the pure sums. 2) search for the best fixed prediction order 3) constant subframe mode (good for encoding silence) Note that the regression test for the decoded wav file also changed. This is due to FFmpeg's FLAC decoder truncating the file, which it did before anyway...just at a different cutoff point. The generated FLAC files are still 100% lossless. With this update, FFmpeg's FLAC encoder has speed and compression somewhere between "flac -1" and "flac -2". On my machine, it's about 15% faster than "flac -2", and about 10% slower than "flac -1". The encoding parameters are identical to "flac -2" (fixed predictors, 1152 blocksize, partition order 0 to 3). Originally committed as revision 5536 to svn://svn.ffmpeg.org/ffmpeg/trunk

flacenc - rice param search patch by (Justin Ruggles jruggle earthlink net
1) search for optimal rice parameters and partition order. i also modified the stereo method estimation to use this to calculate estimated bit count instead of using just the pure sums. 2) search for the best fixed prediction order 3) constant subframe mode (good for encoding silence) Note that the regression test for the decoded wav file also changed. This is due to FFmpeg's FLAC decoder truncating the file, which it did before anyway...just at a different cutoff point. The generated FLAC files are still 100% lossless. With this update, FFmpeg's FLAC encoder has speed and compression somewhere between "flac -1" and "flac -2". On my machine, it's about 15% faster than "flac -2", and about 10% slower than "flac -1". The encoding parameters are identical to "flac -2" (fixed predictors, 1152 blocksize, partition order 0 to 3). Originally committed as revision 5536 to svn://svn.ffmpeg.org/ffmpeg/trunk
e71bcc37 · Justin Ruggles · Michael Niedermayer · f26c2ef5 · e71bcc37 · e71bcc37
Commit e71bcc37 authored Jun 27, 2006 by Justin Ruggles Committed by Michael Niedermayer Jun 27, 2006
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Showing with 313 additions and 109 deletions

flacenc.c libavcodec/flacenc.c +305 -101

ffmpeg.regression.ref tests/ffmpeg.regression.ref +4 -4

rotozoom.regression.ref tests/rotozoom.regression.ref +4 -4

No files found.
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -176,7 +176,7 @@ stddev:1050.18 PSNR:35.89 bytes:1054720
 264236 ./data/a-adpcm_yam.wav
 e92cec8c07913ffb91ad2b11f79cdc00 *./data/out.wav
 stddev:18312.68 PSNR:11.06 bytes:1056768
-9ed4957501a56ce9d4e6a6611553a45f *./data/a-flac.flac
-801577 ./data/a-flac.flac
-0116cdcefd0aeae3ab8e5140c19c725d *./data/out.wav
-stddev: 51.59 PSNR:62.07 bytes:1032192
+9ab5f311b70bc1fa8591b891db50b386 *./data/a-flac.flac
+353384 ./data/a-flac.flac
+c4228df189aad9567a037727d0e763e4 *./data/out.wav
+stddev: 33.31 PSNR:65.87 bytes:1040384
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -176,7 +176,7 @@ stddev:1050.18 PSNR:35.89 bytes:1054720
 264236 ./data/a-adpcm_yam.wav
 e92cec8c07913ffb91ad2b11f79cdc00 *./data/out.wav
 stddev:18312.68 PSNR:11.06 bytes:1056768
-9ed4957501a56ce9d4e6a6611553a45f *./data/a-flac.flac
-801577 ./data/a-flac.flac
-0116cdcefd0aeae3ab8e5140c19c725d *./data/out.wav
-stddev: 51.59 PSNR:62.07 bytes:1032192
+9ab5f311b70bc1fa8591b891db50b386 *./data/a-flac.flac
+353384 ./data/a-flac.flac
+c4228df189aad9567a037727d0e763e4 *./data/out.wav
+stddev: 33.31 PSNR:65.87 bytes:1040384