mirror of
https://github.com/xenia-project/FFmpeg.git
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cut over to using new VP3 DSP functions and remove the old ones; bring
certain source code identifiers in line with official VP3 spec (well, *my* VP3 spec, anyway) Originally committed as revision 2856 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson
parent
44cb64ee89
commit
67335dbce3
330
libavcodec/vp3.c
330
libavcodec/vp3.c
@ -1,6 +1,5 @@
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/*
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*
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* Copyright (C) 2003 the ffmpeg project
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* Copyright (C) 2003-2004 the ffmpeg project
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*
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* This library 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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@ -38,7 +37,6 @@
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#include "dsputil.h"
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#include "vp3data.h"
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@ -253,7 +251,7 @@ typedef struct Vp3DecodeContext {
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/* tables */
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uint16_t coded_dc_scale_factor[64];
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uint32_t coded_quality_threshold[64];
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uint32_t coded_ac_scale_factor[64];
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uint16_t coded_intra_y_dequant[64];
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uint16_t coded_intra_c_dequant[64];
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uint16_t coded_inter_dequant[64];
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@ -306,307 +304,6 @@ typedef struct Vp3DecodeContext {
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static int theora_decode_comments(AVCodecContext *avctx, GetBitContext gb);
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static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb);
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/************************************************************************
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* VP3 I/DCT
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************************************************************************/
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#define IdctAdjustBeforeShift 8
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#define xC1S7 64277
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#define xC2S6 60547
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#define xC3S5 54491
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#define xC4S4 46341
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#define xC5S3 36410
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#define xC6S2 25080
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#define xC7S1 12785
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void vp3_idct_c(int16_t *input_data, int16_t *dequant_matrix,
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int16_t *output_data)
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{
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int32_t intermediate_data[64];
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int32_t *ip = intermediate_data;
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int16_t *op = output_data;
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int32_t A_, B_, C_, D_, _Ad, _Bd, _Cd, _Dd, E_, F_, G_, H_;
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int32_t _Ed, _Gd, _Add, _Bdd, _Fd, _Hd;
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int32_t t1, t2;
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int i, j;
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debug_idct("raw coefficient block:\n");
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for (i = 0; i < 8; i++) {
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for (j = 0; j < 8; j++) {
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debug_idct(" %5d", input_data[i * 8 + j]);
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}
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debug_idct("\n");
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}
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debug_idct("\n");
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for (i = 0; i < 64; i++) {
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j = dezigzag_index[i];
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intermediate_data[j] = dequant_matrix[i] * input_data[i];
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}
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debug_idct("dequantized block:\n");
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for (i = 0; i < 8; i++) {
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for (j = 0; j < 8; j++) {
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debug_idct(" %5d", intermediate_data[i * 8 + j]);
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}
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debug_idct("\n");
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}
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debug_idct("\n");
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/* Inverse DCT on the rows now */
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for (i = 0; i < 8; i++) {
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/* Check for non-zero values */
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if ( ip[0] | ip[1] | ip[2] | ip[3] | ip[4] | ip[5] | ip[6] | ip[7] ) {
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t1 = (int32_t)(xC1S7 * ip[1]);
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t2 = (int32_t)(xC7S1 * ip[7]);
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t1 >>= 16;
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t2 >>= 16;
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A_ = t1 + t2;
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t1 = (int32_t)(xC7S1 * ip[1]);
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t2 = (int32_t)(xC1S7 * ip[7]);
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t1 >>= 16;
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t2 >>= 16;
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B_ = t1 - t2;
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t1 = (int32_t)(xC3S5 * ip[3]);
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t2 = (int32_t)(xC5S3 * ip[5]);
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t1 >>= 16;
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t2 >>= 16;
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C_ = t1 + t2;
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t1 = (int32_t)(xC3S5 * ip[5]);
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t2 = (int32_t)(xC5S3 * ip[3]);
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t1 >>= 16;
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t2 >>= 16;
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D_ = t1 - t2;
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t1 = (int32_t)(xC4S4 * (A_ - C_));
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t1 >>= 16;
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_Ad = t1;
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t1 = (int32_t)(xC4S4 * (B_ - D_));
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t1 >>= 16;
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_Bd = t1;
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_Cd = A_ + C_;
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_Dd = B_ + D_;
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t1 = (int32_t)(xC4S4 * (ip[0] + ip[4]));
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t1 >>= 16;
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E_ = t1;
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t1 = (int32_t)(xC4S4 * (ip[0] - ip[4]));
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t1 >>= 16;
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F_ = t1;
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t1 = (int32_t)(xC2S6 * ip[2]);
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t2 = (int32_t)(xC6S2 * ip[6]);
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t1 >>= 16;
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t2 >>= 16;
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G_ = t1 + t2;
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t1 = (int32_t)(xC6S2 * ip[2]);
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t2 = (int32_t)(xC2S6 * ip[6]);
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t1 >>= 16;
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t2 >>= 16;
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H_ = t1 - t2;
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_Ed = E_ - G_;
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_Gd = E_ + G_;
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_Add = F_ + _Ad;
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_Bdd = _Bd - H_;
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_Fd = F_ - _Ad;
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_Hd = _Bd + H_;
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/* Final sequence of operations over-write original inputs. */
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ip[0] = (int16_t)((_Gd + _Cd ) >> 0);
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ip[7] = (int16_t)((_Gd - _Cd ) >> 0);
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ip[1] = (int16_t)((_Add + _Hd ) >> 0);
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ip[2] = (int16_t)((_Add - _Hd ) >> 0);
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ip[3] = (int16_t)((_Ed + _Dd ) >> 0);
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ip[4] = (int16_t)((_Ed - _Dd ) >> 0);
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ip[5] = (int16_t)((_Fd + _Bdd ) >> 0);
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ip[6] = (int16_t)((_Fd - _Bdd ) >> 0);
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}
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ip += 8; /* next row */
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}
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ip = intermediate_data;
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for ( i = 0; i < 8; i++) {
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/* Check for non-zero values (bitwise or faster than ||) */
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if ( ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8] |
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ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8] ) {
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t1 = (int32_t)(xC1S7 * ip[1*8]);
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t2 = (int32_t)(xC7S1 * ip[7*8]);
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t1 >>= 16;
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t2 >>= 16;
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A_ = t1 + t2;
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t1 = (int32_t)(xC7S1 * ip[1*8]);
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t2 = (int32_t)(xC1S7 * ip[7*8]);
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t1 >>= 16;
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t2 >>= 16;
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B_ = t1 - t2;
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t1 = (int32_t)(xC3S5 * ip[3*8]);
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t2 = (int32_t)(xC5S3 * ip[5*8]);
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t1 >>= 16;
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t2 >>= 16;
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C_ = t1 + t2;
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t1 = (int32_t)(xC3S5 * ip[5*8]);
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t2 = (int32_t)(xC5S3 * ip[3*8]);
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t1 >>= 16;
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t2 >>= 16;
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D_ = t1 - t2;
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t1 = (int32_t)(xC4S4 * (A_ - C_));
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t1 >>= 16;
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_Ad = t1;
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t1 = (int32_t)(xC4S4 * (B_ - D_));
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t1 >>= 16;
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_Bd = t1;
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_Cd = A_ + C_;
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_Dd = B_ + D_;
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t1 = (int32_t)(xC4S4 * (ip[0*8] + ip[4*8]));
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t1 >>= 16;
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E_ = t1;
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t1 = (int32_t)(xC4S4 * (ip[0*8] - ip[4*8]));
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t1 >>= 16;
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F_ = t1;
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t1 = (int32_t)(xC2S6 * ip[2*8]);
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t2 = (int32_t)(xC6S2 * ip[6*8]);
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t1 >>= 16;
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t2 >>= 16;
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G_ = t1 + t2;
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t1 = (int32_t)(xC6S2 * ip[2*8]);
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t2 = (int32_t)(xC2S6 * ip[6*8]);
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t1 >>= 16;
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t2 >>= 16;
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H_ = t1 - t2;
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_Ed = E_ - G_;
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_Gd = E_ + G_;
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_Add = F_ + _Ad;
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_Bdd = _Bd - H_;
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_Fd = F_ - _Ad;
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_Hd = _Bd + H_;
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_Gd += IdctAdjustBeforeShift;
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_Add += IdctAdjustBeforeShift;
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_Ed += IdctAdjustBeforeShift;
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_Fd += IdctAdjustBeforeShift;
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/* Final sequence of operations over-write original inputs. */
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op[0*8] = (int16_t)((_Gd + _Cd ) >> 4);
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op[7*8] = (int16_t)((_Gd - _Cd ) >> 4);
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op[1*8] = (int16_t)((_Add + _Hd ) >> 4);
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op[2*8] = (int16_t)((_Add - _Hd ) >> 4);
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op[3*8] = (int16_t)((_Ed + _Dd ) >> 4);
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op[4*8] = (int16_t)((_Ed - _Dd ) >> 4);
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op[5*8] = (int16_t)((_Fd + _Bdd ) >> 4);
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op[6*8] = (int16_t)((_Fd - _Bdd ) >> 4);
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} else {
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op[0*8] = 0;
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op[7*8] = 0;
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op[1*8] = 0;
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op[2*8] = 0;
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op[3*8] = 0;
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op[4*8] = 0;
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op[5*8] = 0;
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op[6*8] = 0;
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}
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ip++; /* next column */
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op++;
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}
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}
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void vp3_idct_put(int16_t *input_data, int16_t *dequant_matrix,
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uint8_t *dest, int stride)
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{
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int16_t transformed_data[64];
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int16_t *op;
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int i, j;
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vp3_idct_c(input_data, dequant_matrix, transformed_data);
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/* place in final output */
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op = transformed_data;
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for (i = 0; i < 8; i++) {
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for (j = 0; j < 8; j++) {
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if (*op < -128)
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*dest = 0;
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else if (*op > 127)
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*dest = 255;
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else
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*dest = (uint8_t)(*op + 128);
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op++;
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dest++;
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}
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dest += (stride - 8);
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}
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}
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void vp3_idct_add(int16_t *input_data, int16_t *dequant_matrix,
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uint8_t *dest, int stride)
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{
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int16_t transformed_data[64];
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int16_t *op;
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int i, j;
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int16_t sample;
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vp3_idct_c(input_data, dequant_matrix, transformed_data);
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/* place in final output */
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op = transformed_data;
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for (i = 0; i < 8; i++) {
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for (j = 0; j < 8; j++) {
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sample = *dest + *op;
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if (sample < 0)
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*dest = 0;
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else if (sample > 255)
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*dest = 255;
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else
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*dest = (uint8_t)(sample & 0xFF);
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op++;
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dest++;
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}
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dest += (stride - 8);
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}
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}
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/************************************************************************
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* VP3 specific functions
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************************************************************************/
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@ -1145,7 +842,7 @@ s->all_fragments[i].motion_y = 0xbeef;
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static void init_dequantizer(Vp3DecodeContext *s)
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{
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int quality_scale = s->coded_quality_threshold[s->quality_index];
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int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
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int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
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int i, j;
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@ -1159,7 +856,7 @@ static void init_dequantizer(Vp3DecodeContext *s)
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* 100
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*
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* where sf = dc_scale_factor for DC quantizer
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* or quality_scale for AC quantizer
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* or ac_scale_factor for AC quantizer
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*
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* Then, saturate the result to a lower limit of MIN_DEQUANT_VAL.
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*/
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@ -1187,17 +884,17 @@ static void init_dequantizer(Vp3DecodeContext *s)
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j = zigzag_index[i];
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s->intra_y_dequant[j] = s->coded_intra_y_dequant[i] * quality_scale / 100;
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s->intra_y_dequant[j] = s->coded_intra_y_dequant[i] * ac_scale_factor / 100;
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if (s->intra_y_dequant[j] < MIN_DEQUANT_VAL)
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s->intra_y_dequant[j] = MIN_DEQUANT_VAL;
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s->intra_y_dequant[j] *= SCALER;
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s->intra_c_dequant[j] = s->coded_intra_c_dequant[i] * quality_scale / 100;
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s->intra_c_dequant[j] = s->coded_intra_c_dequant[i] * ac_scale_factor / 100;
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if (s->intra_c_dequant[j] < MIN_DEQUANT_VAL)
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s->intra_c_dequant[j] = MIN_DEQUANT_VAL;
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s->intra_c_dequant[j] *= SCALER;
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s->inter_dequant[j] = s->coded_inter_dequant[i] * quality_scale / 100;
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s->inter_dequant[j] = s->coded_inter_dequant[i] * ac_scale_factor / 100;
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if (s->inter_dequant[j] < MIN_DEQUANT_VAL * 2)
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s->inter_dequant[j] = MIN_DEQUANT_VAL * 2;
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s->inter_dequant[j] *= SCALER;
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@ -2478,11 +2175,15 @@ av_log(s->avctx, AV_LOG_ERROR, " help! got beefy vector! (%X, %X)\n", motion_x,
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/* invert DCT and place (or add) in final output */
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if (s->all_fragments[i].coding_method == MODE_INTRA) {
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vp3_idct_put(s->all_fragments[i].coeffs, dequantizer,
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s->dsp.vp3_idct_put(s->all_fragments[i].coeffs,
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dequantizer,
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s->all_fragments[i].coeff_count,
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output_plane + s->all_fragments[i].first_pixel,
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stride);
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} else {
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vp3_idct_add(s->all_fragments[i].coeffs, dequantizer,
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s->dsp.vp3_idct_add(s->all_fragments[i].coeffs,
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dequantizer,
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s->all_fragments[i].coeff_count,
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output_plane + s->all_fragments[i].first_pixel,
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stride);
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}
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@ -2641,6 +2342,7 @@ static int vp3_decode_init(AVCodecContext *avctx)
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avctx->pix_fmt = PIX_FMT_YUV420P;
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avctx->has_b_frames = 0;
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dsputil_init(&s->dsp, avctx);
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s->dsp.vp3_dsp_init();
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/* initialize to an impossible value which will force a recalculation
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* in the first frame decode */
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@ -2700,7 +2402,7 @@ static int vp3_decode_init(AVCodecContext *avctx)
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for (i = 0; i < 64; i++)
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s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
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for (i = 0; i < 64; i++)
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s->coded_quality_threshold[i] = vp31_quality_threshold[i];
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s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
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for (i = 0; i < 64; i++)
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s->coded_intra_y_dequant[i] = vp31_intra_y_dequant[i];
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for (i = 0; i < 64; i++)
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@ -3041,7 +2743,7 @@ static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb)
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/* quality threshold table */
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for (i = 0; i < 64; i++)
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s->coded_quality_threshold[i] = get_bits(&gb, 16);
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s->coded_ac_scale_factor[i] = get_bits(&gb, 16);
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/* dc scale factor table */
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for (i = 0; i < 64; i++)
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@ -1,7 +1,8 @@
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#ifndef VP3DATA_H
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#define VP3DATA_H
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/* these coefficients dequantize intraframe Y plane coefficients */
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/* these coefficients dequantize intraframe Y plane coefficients
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* (note: same as JPEG) */
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static int16_t vp31_intra_y_dequant[64] =
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{ 16, 11, 10, 16, 24, 40, 51, 61,
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12, 12, 14, 19, 26, 58, 60, 55,
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@ -13,7 +14,8 @@ static int16_t vp31_intra_y_dequant[64] =
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72, 92, 95, 98, 112, 100, 103, 99
|
||||
};
|
||||
|
||||
/* these coefficients dequantize intraframe C plane coefficients */
|
||||
/* these coefficients dequantize intraframe C plane coefficients
|
||||
* (note: same as JPEG) */
|
||||
static int16_t vp31_intra_c_dequant[64] =
|
||||
{ 17, 18, 24, 47, 99, 99, 99, 99,
|
||||
18, 21, 26, 66, 99, 99, 99, 99,
|
||||
@ -48,7 +50,7 @@ static int16_t vp31_dc_scale_factor[64] =
|
||||
20, 10, 10, 10, 10, 10, 10, 10
|
||||
};
|
||||
|
||||
static uint32_t vp31_quality_threshold[64] =
|
||||
static uint32_t vp31_ac_scale_factor[64] =
|
||||
{ 500, 450, 400, 370, 340, 310, 285, 265,
|
||||
245, 225, 210, 195, 185, 180, 170, 160,
|
||||
150, 145, 135, 130, 125, 115, 110, 107,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user