Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Christophe Gisquet	7ece8b50b1	x86: simple_idct: 12bits versions On 12 frames of a 444p 12 bits DNxHR sequence, _put function: C: 78902 decicycles in idct, 262071 runs, 73 skips avx: 32478 decicycles in idct, 262045 runs, 99 skips Difference between the 2: stddev: 0.39 PSNR:104.47 MAXDIFF: 2 This is unavoidable and due to the scale factors used in the x86 version, which cannot match the C ones. In addition, the trick of adding an initial bias to the input of a pass can overflow, as the input coefficients are already 15bits, which is the maximum this function can handle. Overall, however, the omse on 12 bits samples goes from 0.16916 to 0.16883. Reducing rowshift by 1 improves to 0.0908, but causes overflows. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	10 years ago
Christophe Gisquet	4369b9dc7b	x86: simple_idct(_put): 10bits versions Modeled from the prores version. Clips to [0;1023] and is bitexact. Bitexactness requires to add offsets in different places compared to prores or C, and makes the function approximately 2% slower. For 16 frames of a DNxHD 4:2:2 10bits test sequence: C: 60861 decicycles in idct, 1048205 runs, 371 skips sse2: 27567 decicycles in idct, 1048216 runs, 360 skips avx: 26272 decicycles in idct, 1048171 runs, 405 skips The add version is not implemented, so the corresponding dsp function is set to NULL to make it clear in a code executing it. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	10 years ago
James Almer	4f4f08e6f0	x86/idctdsp: port {put,add}_pixels_clamped to yasm Also add sse2 versions for both. put_pixels_clamped port and sse2 version originally written by Timothy Gu. Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: James Almer <jamrial@gmail.com>	11 years ago
Diego Biurrun	84d173d3de	xvididct: Ensure that the scantable permutation is always set correctly This fixes cases where the scantable permuation would get overwritten by the general idctdsp initialization.	11 years ago
Diego Biurrun	a786c8259d	idct: Split off Xvid IDCT The Xvid IDCT is only required to decode some Xvid-encoded MPEG-4 files, so there is no point in having it as an unconditional part of idctdsp.	11 years ago
Diego Biurrun	5dcc201505	simple_idct: Move x86-specific declarations to a header in the x86 directory	11 years ago
Diego Biurrun	8b0dd4942a	idctdsp: prettyprinting cosmetics	11 years ago
Diego Biurrun	b4987f7219	idct: Convert IDCT permutation #defines to an enum Also rename the enum values to be consistent with other DCT permutations.	11 years ago
Diego Biurrun	e3fcb14347	dsputil: Split off IDCT bits into their own context	11 years ago