mirror of
https://github.com/FFmpeg/FFmpeg.git
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xvid: Add C IDCT
Thanks to Pascal Massimino and Michael Militzer for relicensing as LGPL. Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Pascal Massimino
Diego Biurrun
parent
95c0cec03a
commit
7a1d6ddd2c
@ -42,6 +42,7 @@
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#include "dct.h"
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#include "dct.h"
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#include "idctdsp.h"
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#include "idctdsp.h"
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#include "simple_idct.h"
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#include "simple_idct.h"
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#include "xvididct.h"
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#include "aandcttab.h"
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#include "aandcttab.h"
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#include "faandct.h"
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#include "faandct.h"
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#include "faanidct.h"
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#include "faanidct.h"
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@ -62,11 +63,14 @@ static const struct algo fdct_tab[4] = {
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{ "IJG-LLM-INT", ff_jpeg_fdct_islow_8, FF_IDCT_PERM_NONE },
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{ "IJG-LLM-INT", ff_jpeg_fdct_islow_8, FF_IDCT_PERM_NONE },
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};
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};
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static const struct algo idct_tab[4] = {
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static const struct algo idct_tab[] = {
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{ "FAANI", ff_faanidct, FF_IDCT_PERM_NONE },
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{ "FAANI", ff_faanidct, FF_IDCT_PERM_NONE },
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{ "REF-DBL", ff_ref_idct, FF_IDCT_PERM_NONE },
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{ "REF-DBL", ff_ref_idct, FF_IDCT_PERM_NONE },
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{ "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
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{ "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
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{ "SIMPLE-C", ff_simple_idct_8, FF_IDCT_PERM_NONE },
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{ "SIMPLE-C", ff_simple_idct_8, FF_IDCT_PERM_NONE },
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#if CONFIG_MPEG4_DECODER
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{ "XVID", ff_xvid_idct, FF_IDCT_PERM_NONE, 0, 1 },
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#endif /* CONFIG_MPEG4_DECODER */
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};
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};
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#if ARCH_ARM
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#if ARCH_ARM
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@ -26,10 +26,16 @@
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#include "idctdsp.h"
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#include "idctdsp.h"
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#include "xvididct.h"
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#include "xvididct.h"
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av_cold void ff_xvid_idct_init_x86(IDCTDSPContext *c)
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av_cold void ff_xvid_idct_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
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unsigned high_bit_depth)
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{
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{
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int cpu_flags = av_get_cpu_flags();
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int cpu_flags = av_get_cpu_flags();
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if (high_bit_depth ||
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!(avctx->idct_algo == FF_IDCT_AUTO ||
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avctx->idct_algo == FF_IDCT_XVID))
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return;
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if (INLINE_MMX(cpu_flags)) {
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if (INLINE_MMX(cpu_flags)) {
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c->idct_put = ff_xvid_idct_mmx_put;
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c->idct_put = ff_xvid_idct_mmx_put;
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c->idct_add = ff_xvid_idct_mmx_add;
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c->idct_add = ff_xvid_idct_mmx_add;
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@ -1,4 +1,8 @@
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/*
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/*
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* Xvid MPEG-4 IDCT
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*
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* Copyright (C) 2006-2011 Xvid Solutions GmbH
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*
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* This file is part of Libav.
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* This file is part of Libav.
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*
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*
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* Libav is free software; you can redistribute it and/or
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* Libav is free software; you can redistribute it and/or
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@ -16,23 +20,331 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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*/
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/**
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* @file
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* Walken IDCT
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* Alternative IDCT implementation for decoding compatibility.
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*
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* @author Skal
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* @note This C version is not the original IDCT, but a modified one that
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* yields the same error profile as the MMX/MMXEXT/SSE2 versions.
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*/
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#include "config.h"
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/attributes.h"
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#include "avcodec.h"
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#include "avcodec.h"
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#include "idctdsp.h"
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#include "idctdsp.h"
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#include "xvididct.h"
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#include "xvididct.h"
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#define ROW_SHIFT 11
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#define COL_SHIFT 6
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// #define FIX(x) (int)((x) * (1 << ROW_SHIFT))
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#define RND0 65536 // 1 << (COL_SHIFT + ROW_SHIFT - 1);
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#define RND1 3597 // FIX (1.75683487303);
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#define RND2 2260 // FIX (1.10355339059);
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#define RND3 1203 // FIX (0.587788325588);
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#define RND4 0
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#define RND5 120 // FIX (0.058658283817);
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#define RND6 512 // FIX (0.25);
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#define RND7 512 // FIX (0.25);
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static const int TAB04[] = { 22725, 21407, 19266, 16384, 12873, 8867, 4520 };
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static const int TAB17[] = { 31521, 29692, 26722, 22725, 17855, 12299, 6270 };
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static const int TAB26[] = { 29692, 27969, 25172, 21407, 16819, 11585, 5906 };
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static const int TAB35[] = { 26722, 25172, 22654, 19266, 15137, 10426, 5315 };
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static int idct_row(short *in, const int *const tab, int rnd)
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{
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const int c1 = tab[0];
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const int c2 = tab[1];
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const int c3 = tab[2];
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const int c4 = tab[3];
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const int c5 = tab[4];
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const int c6 = tab[5];
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const int c7 = tab[6];
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const int right = in[5] | in[6] | in[7];
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const int left = in[1] | in[2] | in[3];
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if (!(right | in[4])) {
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const int k = c4 * in[0] + rnd;
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if (left) {
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const int a0 = k + c2 * in[2];
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const int a1 = k + c6 * in[2];
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const int a2 = k - c6 * in[2];
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const int a3 = k - c2 * in[2];
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const int b0 = c1 * in[1] + c3 * in[3];
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const int b1 = c3 * in[1] - c7 * in[3];
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const int b2 = c5 * in[1] - c1 * in[3];
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const int b3 = c7 * in[1] - c5 * in[3];
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in[0] = (a0 + b0) >> ROW_SHIFT;
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in[1] = (a1 + b1) >> ROW_SHIFT;
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in[2] = (a2 + b2) >> ROW_SHIFT;
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in[3] = (a3 + b3) >> ROW_SHIFT;
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in[4] = (a3 - b3) >> ROW_SHIFT;
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in[5] = (a2 - b2) >> ROW_SHIFT;
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in[6] = (a1 - b1) >> ROW_SHIFT;
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in[7] = (a0 - b0) >> ROW_SHIFT;
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} else {
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const int a0 = k >> ROW_SHIFT;
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if (a0) {
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in[0] =
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in[1] =
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in[2] =
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in[3] =
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in[4] =
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in[5] =
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in[6] =
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in[7] = a0;
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} else
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return 0;
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}
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} else if (!(left | right)) {
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const int a0 = (rnd + c4 * (in[0] + in[4])) >> ROW_SHIFT;
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const int a1 = (rnd + c4 * (in[0] - in[4])) >> ROW_SHIFT;
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in[0] = a0;
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in[3] = a0;
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in[4] = a0;
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in[7] = a0;
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in[1] = a1;
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in[2] = a1;
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in[5] = a1;
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in[6] = a1;
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} else {
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const int k = c4 * in[0] + rnd;
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const int a0 = k + c2 * in[2] + c4 * in[4] + c6 * in[6];
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const int a1 = k + c6 * in[2] - c4 * in[4] - c2 * in[6];
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const int a2 = k - c6 * in[2] - c4 * in[4] + c2 * in[6];
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const int a3 = k - c2 * in[2] + c4 * in[4] - c6 * in[6];
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const int b0 = c1 * in[1] + c3 * in[3] + c5 * in[5] + c7 * in[7];
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const int b1 = c3 * in[1] - c7 * in[3] - c1 * in[5] - c5 * in[7];
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const int b2 = c5 * in[1] - c1 * in[3] + c7 * in[5] + c3 * in[7];
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const int b3 = c7 * in[1] - c5 * in[3] + c3 * in[5] - c1 * in[7];
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in[0] = (a0 + b0) >> ROW_SHIFT;
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in[1] = (a1 + b1) >> ROW_SHIFT;
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in[2] = (a2 + b2) >> ROW_SHIFT;
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in[3] = (a3 + b3) >> ROW_SHIFT;
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in[4] = (a3 - b3) >> ROW_SHIFT;
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in[5] = (a2 - b2) >> ROW_SHIFT;
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in[6] = (a1 - b1) >> ROW_SHIFT;
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in[7] = (a0 - b0) >> ROW_SHIFT;
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}
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return 1;
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}
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#define TAN1 0x32EC
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#define TAN2 0x6A0A
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#define TAN3 0xAB0E
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#define SQRT2 0x5A82
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#define MULT(c, x, n) (((c) * (x)) >> (n))
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// 12b version => #define MULT(c,x, n) ((((c) >> 3) * (x)) >> ((n) - 3))
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// 12b zero-testing version:
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#define BUTTERFLY(a, b, tmp) \
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(tmp) = (a) + (b); \
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(b) = (a) - (b); \
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(a) = (tmp)
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#define LOAD_BUTTERFLY(m1, m2, a, b, tmp, s) \
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(m1) = (s)[(a)] + (s)[(b)]; \
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(m2) = (s)[(a)] - (s)[(b)]
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static void idct_col_8(short *const in)
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{
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int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
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// odd
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mm4 = (int) in[7 * 8];
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mm5 = (int) in[5 * 8];
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mm6 = (int) in[3 * 8];
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mm7 = (int) in[1 * 8];
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mm0 = MULT(TAN1, mm4, 16) + mm7;
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mm1 = MULT(TAN1, mm7, 16) - mm4;
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mm2 = MULT(TAN3, mm5, 16) + mm6;
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mm3 = MULT(TAN3, mm6, 16) - mm5;
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mm7 = mm0 + mm2;
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mm4 = mm1 - mm3;
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mm0 = mm0 - mm2;
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mm1 = mm1 + mm3;
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mm6 = mm0 + mm1;
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mm5 = mm0 - mm1;
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mm5 = 2 * MULT(SQRT2, mm5, 16); // 2*sqrt2
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mm6 = 2 * MULT(SQRT2, mm6, 16); // Watch out: precision loss but done to match
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// the pmulhw used in MMX/MMXEXT/SSE2 versions
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// even
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mm1 = (int) in[2 * 8];
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mm2 = (int) in[6 * 8];
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mm3 = MULT(TAN2, mm2, 16) + mm1;
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mm2 = MULT(TAN2, mm1, 16) - mm2;
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LOAD_BUTTERFLY(mm0, mm1, 0 * 8, 4 * 8, spill, in);
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BUTTERFLY(mm0, mm3, spill);
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BUTTERFLY(mm0, mm7, spill);
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in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
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in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
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BUTTERFLY(mm3, mm4, mm0);
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in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
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in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);
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BUTTERFLY(mm1, mm2, mm0);
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BUTTERFLY(mm1, mm6, mm0);
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in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
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in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
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BUTTERFLY(mm2, mm5, mm0);
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in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
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in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
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}
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static void idct_col_4(short *const in)
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{
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int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
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// odd
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mm0 = (int) in[1 * 8];
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mm2 = (int) in[3 * 8];
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mm1 = MULT(TAN1, mm0, 16);
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mm3 = MULT(TAN3, mm2, 16);
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mm7 = mm0 + mm2;
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mm4 = mm1 - mm3;
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mm0 = mm0 - mm2;
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mm1 = mm1 + mm3;
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mm6 = mm0 + mm1;
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mm5 = mm0 - mm1;
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mm6 = 2 * MULT(SQRT2, mm6, 16); // 2*sqrt2
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mm5 = 2 * MULT(SQRT2, mm5, 16);
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// even
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mm0 = mm1 = (int) in[0 * 8];
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mm3 = (int) in[2 * 8];
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mm2 = MULT(TAN2, mm3, 16);
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BUTTERFLY(mm0, mm3, spill);
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BUTTERFLY(mm0, mm7, spill);
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in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
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in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
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BUTTERFLY(mm3, mm4, mm0);
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in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
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in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);
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BUTTERFLY(mm1, mm2, mm0);
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BUTTERFLY(mm1, mm6, mm0);
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in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
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in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
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BUTTERFLY(mm2, mm5, mm0);
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in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
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in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
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}
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static void idct_col_3(short *const in)
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{
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int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;
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// odd
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mm7 = (int) in[1 * 8];
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mm4 = MULT(TAN1, mm7, 16);
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mm6 = mm7 + mm4;
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mm5 = mm7 - mm4;
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mm6 = 2 * MULT(SQRT2, mm6, 16); // 2*sqrt2
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mm5 = 2 * MULT(SQRT2, mm5, 16);
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// even
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mm0 = mm1 = (int) in[0 * 8];
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mm3 = (int) in[2 * 8];
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mm2 = MULT(TAN2, mm3, 16);
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BUTTERFLY(mm0, mm3, spill);
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BUTTERFLY(mm0, mm7, spill);
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in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
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in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
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BUTTERFLY(mm3, mm4, mm0);
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in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
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in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);
|
||||||
|
|
||||||
|
BUTTERFLY(mm1, mm2, mm0);
|
||||||
|
BUTTERFLY(mm1, mm6, mm0);
|
||||||
|
in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
|
||||||
|
in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
|
||||||
|
BUTTERFLY(mm2, mm5, mm0);
|
||||||
|
in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
|
||||||
|
in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ff_xvid_idct(int16_t *const in)
|
||||||
|
{
|
||||||
|
int i, rows = 0x07;
|
||||||
|
|
||||||
|
idct_row(in + 0 * 8, TAB04, RND0);
|
||||||
|
idct_row(in + 1 * 8, TAB17, RND1);
|
||||||
|
idct_row(in + 2 * 8, TAB26, RND2);
|
||||||
|
if (idct_row(in + 3 * 8, TAB35, RND3))
|
||||||
|
rows |= 0x08;
|
||||||
|
if (idct_row(in + 4 * 8, TAB04, RND4))
|
||||||
|
rows |= 0x10;
|
||||||
|
if (idct_row(in + 5 * 8, TAB35, RND5))
|
||||||
|
rows |= 0x20;
|
||||||
|
if (idct_row(in + 6 * 8, TAB26, RND6))
|
||||||
|
rows |= 0x40;
|
||||||
|
if (idct_row(in + 7 * 8, TAB17, RND7))
|
||||||
|
rows |= 0x80;
|
||||||
|
|
||||||
|
if (rows & 0xF0) {
|
||||||
|
for (i = 0; i < 8; i++)
|
||||||
|
idct_col_8(in + i);
|
||||||
|
} else if (rows & 0x08) {
|
||||||
|
for (i = 0; i < 8; i++)
|
||||||
|
idct_col_4(in + i);
|
||||||
|
} else {
|
||||||
|
for (i = 0; i < 8; i++)
|
||||||
|
idct_col_3(in + i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void xvid_idct_put(uint8_t *dest, int line_size, int16_t *block)
|
||||||
|
{
|
||||||
|
ff_xvid_idct(block);
|
||||||
|
ff_put_pixels_clamped(block, dest, line_size);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void xvid_idct_add(uint8_t *dest, int line_size, int16_t *block)
|
||||||
|
{
|
||||||
|
ff_xvid_idct(block);
|
||||||
|
ff_add_pixels_clamped(block, dest, line_size);
|
||||||
|
}
|
||||||
|
|
||||||
av_cold void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx)
|
av_cold void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx)
|
||||||
{
|
{
|
||||||
const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
|
const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;
|
||||||
|
|
||||||
if (high_bit_depth ||
|
if (!high_bit_depth &&
|
||||||
!(avctx->idct_algo == FF_IDCT_AUTO ||
|
(avctx->idct_algo == FF_IDCT_AUTO ||
|
||||||
avctx->idct_algo == FF_IDCT_XVID))
|
avctx->idct_algo == FF_IDCT_XVID)) {
|
||||||
return;
|
c->idct_put = xvid_idct_put;
|
||||||
|
c->idct_add = xvid_idct_add;
|
||||||
|
c->idct = ff_xvid_idct;
|
||||||
|
c->perm_type = FF_IDCT_PERM_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
if (ARCH_X86)
|
if (ARCH_X86)
|
||||||
ff_xvid_idct_init_x86(c);
|
ff_xvid_idct_init_x86(c, avctx, high_bit_depth);
|
||||||
|
|
||||||
ff_init_scantable_permutation(c->idct_permutation, c->perm_type);
|
ff_init_scantable_permutation(c->idct_permutation, c->perm_type);
|
||||||
}
|
}
|
||||||
|
|||||||
@ -19,11 +19,16 @@
|
|||||||
#ifndef AVCODEC_XVIDIDCT_H
|
#ifndef AVCODEC_XVIDIDCT_H
|
||||||
#define AVCODEC_XVIDIDCT_H
|
#define AVCODEC_XVIDIDCT_H
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
|
||||||
#include "avcodec.h"
|
#include "avcodec.h"
|
||||||
#include "idctdsp.h"
|
#include "idctdsp.h"
|
||||||
|
|
||||||
|
void ff_xvid_idct(int16_t *const in);
|
||||||
|
|
||||||
void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx);
|
void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx);
|
||||||
|
|
||||||
void ff_xvid_idct_init_x86(IDCTDSPContext *c);
|
void ff_xvid_idct_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
|
||||||
|
unsigned high_bit_depth);
|
||||||
|
|
||||||
#endif /* AVCODEC_XVIDIDCT_H */
|
#endif /* AVCODEC_XVIDIDCT_H */
|
||||||
|
|||||||
@ -1,8 +1,7 @@
|
|||||||
fate-xvid-custom-matrix: CMD = framemd5 -flags +bitexact -idct simple -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
|
fate-xvid-custom-matrix: CMD = framemd5 -flags +bitexact -idct simple -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
|
||||||
fate-xvid-idctmmx: CMD = framemd5 -flags +bitexact -cpuflags all -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
|
fate-xvid-idct: CMD = framemd5 -flags +bitexact -cpuflags all -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
|
||||||
|
|
||||||
FATE_XVID-$(call DEMDEC, M4V, MPEG4) += fate-xvid-custom-matrix
|
FATE_XVID-$(call DEMDEC, M4V, MPEG4) += fate-xvid-custom-matrix fate-xvid-idct
|
||||||
FATE_XVID-$(filter $(HAVE_MMX_INLINE), $(call DEMDEC, M4V, MPEG4)) += fate-xvid-idctmmx
|
|
||||||
|
|
||||||
FATE_SAMPLES_AVCONV += $(FATE_XVID-yes)
|
FATE_SAMPLES_AVCONV += $(FATE_XVID-yes)
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user