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| author | Michael Niedermayer <michaelni@gmx.at> | 2005-04-09 22:15:48 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2005-04-09 22:15:48 +0000 |
| commit | a0a74ad9f0f18b276b0f3581c533f19e598b7eac (patch) | |
| tree | ff849a858fbb041ad964625f86784464c485b854 | |
| parent | c97de57c39418cb2186e37826576d0d29b2d01f2 (diff) | |
| download | ffmpeg-a0a74ad9f0f18b276b0f3581c533f19e598b7eac.tar.gz | |
increasing precission of the quantization parameter
this is needed as the quantization stepsize for each subband is also in this precission and insignificant changes to the wavelet like scaling its coefficients slightly differently would lead to wildly variing PSNR and bitrate
note, a encoder could also simply choose to leave the least significant bits of the quantization parameters zero which would give the exact previous behaviour except a y very tiny number of bits in the header
Originally committed as revision 4115 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/snow.c | 2 | ||||
| -rw-r--r-- | tests/ffmpeg.regression.ref | 12 | ||||
| -rw-r--r-- | tests/rotozoom.regression.ref | 12 |
3 files changed, 13 insertions, 13 deletions
diff --git a/libavcodec/snow.c b/libavcodec/snow.c index b355920553..f96d9343a7 100644 --- a/libavcodec/snow.c +++ b/libavcodec/snow.c @@ -31,7 +31,7 @@ #define MAX_DECOMPOSITIONS 8 #define MAX_PLANES 4 #define DWTELEM int -#define QSHIFT 3 +#define QSHIFT 5 #define QROOT (1<<QSHIFT) #define LOSSLESS_QLOG -128 #define FRAC_BITS 8 diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref index c5517d6b8a..98c7f4eb89 100644 --- a/tests/ffmpeg.regression.ref +++ b/tests/ffmpeg.regression.ref @@ -119,12 +119,12 @@ a7ef4746f27be309138c188e327d3ebe *./data/a-ffv1.avi 2653642 ./data/a-ffv1.avi 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv stddev: 0.00 PSNR:99.99 bytes:7602176 -3e7738ae0429e48d3465d4f941eb7448 *./data/a-snow.avi -1280602 ./data/a-snow.avi -e4b8c83278efee032a84569c25593937 *./data/out.yuv -stddev: 2.92 PSNR:38.79 bytes:7602176 -45687368463932f08dbc74c973ad32dd *./data/a-snow53.avi -3537042 ./data/a-snow53.avi +15527997420c2ace9ab26e4504f7ca8d *./data/a-snow.avi +1269510 ./data/a-snow.avi +20e858677a35136bfa0765fafd3f9385 *./data/out.yuv +stddev: 2.96 PSNR:38.67 bytes:7602176 +28b6a82fdd8058e2df35778c9a5edbbf *./data/a-snow53.avi +3537074 ./data/a-snow53.avi 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv stddev: 0.00 PSNR:99.99 bytes:7602176 b5b6275f58f012de73644bbaa9080097 *./data/a-svq1.mov diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref index 352eb9a8ac..2debc64a14 100644 --- a/tests/rotozoom.regression.ref +++ b/tests/rotozoom.regression.ref @@ -119,12 +119,12 @@ d0831a8339491fd680b650f05262e5d9 *./data/a-ffv1.avi 3524768 ./data/a-ffv1.avi dde5895817ad9d219f79a52d0bdfb001 *./data/out.yuv stddev: 0.00 PSNR:99.99 bytes:7602176 -6e0ea3a5128f54f42e5fdb81532d95fe *./data/a-snow.avi -332700 ./data/a-snow.avi -1f3439e1b3ff09492f196a024d7119e3 *./data/out.yuv -stddev: 2.37 PSNR:40.60 bytes:7602176 -92ab639886be86087942dd76cfd91bf3 *./data/a-snow53.avi -2724572 ./data/a-snow53.avi +7b3468914d99ff2803c35560a0a4a6f0 *./data/a-snow.avi +327494 ./data/a-snow.avi +3c1e7765d9be2af73e992c2f6d769e7b *./data/out.yuv +stddev: 2.40 PSNR:40.52 bytes:7602176 +8b510a8e4a26d6d469bd80b46922d5e6 *./data/a-snow53.avi +2724602 ./data/a-snow53.avi dde5895817ad9d219f79a52d0bdfb001 *./data/out.yuv stddev: 0.00 PSNR:99.99 bytes:7602176 920c610ec324b772d882b0717e375943 *./data/a-svq1.mov |