mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 12:32:03 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
277 lines
7.1 KiB
C
277 lines
7.1 KiB
C
/*
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* Template for the Discrete Cosine Transform for 32 samples
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* Copyright (c) 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "dct32.h"
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#include "mathops.h"
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#if DCT32_FLOAT
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# define dct32 ff_dct32_float
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# define FIXHR(x) ((float)(x))
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# define MULH3(x, y, s) ((s)*(y)*(x))
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# define INTFLOAT float
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#else
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# define dct32 ff_dct32_fixed
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# define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
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# define MULH3(x, y, s) MULH((s)*(x), y)
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# define INTFLOAT int
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#endif
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/* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */
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/* cos(i*pi/64) */
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#define COS0_0 FIXHR(0.50060299823519630134/2)
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#define COS0_1 FIXHR(0.50547095989754365998/2)
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#define COS0_2 FIXHR(0.51544730992262454697/2)
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#define COS0_3 FIXHR(0.53104259108978417447/2)
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#define COS0_4 FIXHR(0.55310389603444452782/2)
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#define COS0_5 FIXHR(0.58293496820613387367/2)
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#define COS0_6 FIXHR(0.62250412303566481615/2)
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#define COS0_7 FIXHR(0.67480834145500574602/2)
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#define COS0_8 FIXHR(0.74453627100229844977/2)
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#define COS0_9 FIXHR(0.83934964541552703873/2)
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#define COS0_10 FIXHR(0.97256823786196069369/2)
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#define COS0_11 FIXHR(1.16943993343288495515/4)
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#define COS0_12 FIXHR(1.48416461631416627724/4)
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#define COS0_13 FIXHR(2.05778100995341155085/8)
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#define COS0_14 FIXHR(3.40760841846871878570/8)
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#define COS0_15 FIXHR(10.19000812354805681150/32)
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#define COS1_0 FIXHR(0.50241928618815570551/2)
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#define COS1_1 FIXHR(0.52249861493968888062/2)
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#define COS1_2 FIXHR(0.56694403481635770368/2)
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#define COS1_3 FIXHR(0.64682178335999012954/2)
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#define COS1_4 FIXHR(0.78815462345125022473/2)
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#define COS1_5 FIXHR(1.06067768599034747134/4)
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#define COS1_6 FIXHR(1.72244709823833392782/4)
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#define COS1_7 FIXHR(5.10114861868916385802/16)
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#define COS2_0 FIXHR(0.50979557910415916894/2)
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#define COS2_1 FIXHR(0.60134488693504528054/2)
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#define COS2_2 FIXHR(0.89997622313641570463/2)
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#define COS2_3 FIXHR(2.56291544774150617881/8)
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#define COS3_0 FIXHR(0.54119610014619698439/2)
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#define COS3_1 FIXHR(1.30656296487637652785/4)
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#define COS4_0 FIXHR(M_SQRT1_2/2)
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/* butterfly operator */
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#define BF(a, b, c, s)\
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{\
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tmp0 = val##a + val##b;\
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tmp1 = val##a - val##b;\
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val##a = tmp0;\
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val##b = MULH3(tmp1, c, 1<<(s));\
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}
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#define BF0(a, b, c, s)\
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{\
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tmp0 = tab[a] + tab[b];\
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tmp1 = tab[a] - tab[b];\
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val##a = tmp0;\
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val##b = MULH3(tmp1, c, 1<<(s));\
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}
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#define BF1(a, b, c, d)\
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{\
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BF(a, b, COS4_0, 1);\
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BF(c, d,-COS4_0, 1);\
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val##c += val##d;\
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}
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#define BF2(a, b, c, d)\
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{\
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BF(a, b, COS4_0, 1);\
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BF(c, d,-COS4_0, 1);\
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val##c += val##d;\
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val##a += val##c;\
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val##c += val##b;\
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val##b += val##d;\
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}
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#define ADD(a, b) val##a += val##b
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/* DCT32 without 1/sqrt(2) coef zero scaling. */
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void dct32(INTFLOAT *out, const INTFLOAT *tab)
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{
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INTFLOAT tmp0, tmp1;
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INTFLOAT val0 , val1 , val2 , val3 , val4 , val5 , val6 , val7 ,
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val8 , val9 , val10, val11, val12, val13, val14, val15,
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val16, val17, val18, val19, val20, val21, val22, val23,
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val24, val25, val26, val27, val28, val29, val30, val31;
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/* pass 1 */
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BF0( 0, 31, COS0_0 , 1);
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BF0(15, 16, COS0_15, 5);
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/* pass 2 */
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BF( 0, 15, COS1_0 , 1);
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BF(16, 31,-COS1_0 , 1);
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/* pass 1 */
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BF0( 7, 24, COS0_7 , 1);
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BF0( 8, 23, COS0_8 , 1);
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/* pass 2 */
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BF( 7, 8, COS1_7 , 4);
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BF(23, 24,-COS1_7 , 4);
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/* pass 3 */
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BF( 0, 7, COS2_0 , 1);
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BF( 8, 15,-COS2_0 , 1);
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BF(16, 23, COS2_0 , 1);
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BF(24, 31,-COS2_0 , 1);
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/* pass 1 */
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BF0( 3, 28, COS0_3 , 1);
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BF0(12, 19, COS0_12, 2);
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/* pass 2 */
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BF( 3, 12, COS1_3 , 1);
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BF(19, 28,-COS1_3 , 1);
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/* pass 1 */
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BF0( 4, 27, COS0_4 , 1);
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BF0(11, 20, COS0_11, 2);
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/* pass 2 */
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BF( 4, 11, COS1_4 , 1);
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BF(20, 27,-COS1_4 , 1);
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/* pass 3 */
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BF( 3, 4, COS2_3 , 3);
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BF(11, 12,-COS2_3 , 3);
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BF(19, 20, COS2_3 , 3);
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BF(27, 28,-COS2_3 , 3);
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/* pass 4 */
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BF( 0, 3, COS3_0 , 1);
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BF( 4, 7,-COS3_0 , 1);
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BF( 8, 11, COS3_0 , 1);
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BF(12, 15,-COS3_0 , 1);
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BF(16, 19, COS3_0 , 1);
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BF(20, 23,-COS3_0 , 1);
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BF(24, 27, COS3_0 , 1);
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BF(28, 31,-COS3_0 , 1);
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/* pass 1 */
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BF0( 1, 30, COS0_1 , 1);
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BF0(14, 17, COS0_14, 3);
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/* pass 2 */
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BF( 1, 14, COS1_1 , 1);
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BF(17, 30,-COS1_1 , 1);
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/* pass 1 */
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BF0( 6, 25, COS0_6 , 1);
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BF0( 9, 22, COS0_9 , 1);
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/* pass 2 */
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BF( 6, 9, COS1_6 , 2);
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BF(22, 25,-COS1_6 , 2);
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/* pass 3 */
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BF( 1, 6, COS2_1 , 1);
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BF( 9, 14,-COS2_1 , 1);
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BF(17, 22, COS2_1 , 1);
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BF(25, 30,-COS2_1 , 1);
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/* pass 1 */
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BF0( 2, 29, COS0_2 , 1);
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BF0(13, 18, COS0_13, 3);
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/* pass 2 */
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BF( 2, 13, COS1_2 , 1);
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BF(18, 29,-COS1_2 , 1);
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/* pass 1 */
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BF0( 5, 26, COS0_5 , 1);
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BF0(10, 21, COS0_10, 1);
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/* pass 2 */
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BF( 5, 10, COS1_5 , 2);
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BF(21, 26,-COS1_5 , 2);
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/* pass 3 */
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BF( 2, 5, COS2_2 , 1);
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BF(10, 13,-COS2_2 , 1);
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BF(18, 21, COS2_2 , 1);
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BF(26, 29,-COS2_2 , 1);
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/* pass 4 */
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BF( 1, 2, COS3_1 , 2);
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BF( 5, 6,-COS3_1 , 2);
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BF( 9, 10, COS3_1 , 2);
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BF(13, 14,-COS3_1 , 2);
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BF(17, 18, COS3_1 , 2);
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BF(21, 22,-COS3_1 , 2);
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BF(25, 26, COS3_1 , 2);
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BF(29, 30,-COS3_1 , 2);
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/* pass 5 */
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BF1( 0, 1, 2, 3);
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BF2( 4, 5, 6, 7);
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BF1( 8, 9, 10, 11);
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BF2(12, 13, 14, 15);
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BF1(16, 17, 18, 19);
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BF2(20, 21, 22, 23);
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BF1(24, 25, 26, 27);
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BF2(28, 29, 30, 31);
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/* pass 6 */
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ADD( 8, 12);
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ADD(12, 10);
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ADD(10, 14);
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ADD(14, 9);
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ADD( 9, 13);
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ADD(13, 11);
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ADD(11, 15);
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out[ 0] = val0;
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out[16] = val1;
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out[ 8] = val2;
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out[24] = val3;
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out[ 4] = val4;
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out[20] = val5;
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out[12] = val6;
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out[28] = val7;
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out[ 2] = val8;
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out[18] = val9;
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out[10] = val10;
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out[26] = val11;
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out[ 6] = val12;
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out[22] = val13;
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out[14] = val14;
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out[30] = val15;
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ADD(24, 28);
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ADD(28, 26);
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ADD(26, 30);
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ADD(30, 25);
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ADD(25, 29);
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ADD(29, 27);
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ADD(27, 31);
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out[ 1] = val16 + val24;
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out[17] = val17 + val25;
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out[ 9] = val18 + val26;
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out[25] = val19 + val27;
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out[ 5] = val20 + val28;
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out[21] = val21 + val29;
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out[13] = val22 + val30;
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out[29] = val23 + val31;
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out[ 3] = val24 + val20;
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out[19] = val25 + val21;
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out[11] = val26 + val22;
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out[27] = val27 + val23;
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out[ 7] = val28 + val18;
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out[23] = val29 + val19;
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out[15] = val30 + val17;
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out[31] = val31;
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}
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