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FFmpeg/libavcodec/h264dsp_internal.h

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  1. /*

  2.  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder

  3.  * Copyright (c) 2003-2011 Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * H.264 / AVC / MPEG4 part10 DSP functions.

  25.  * @author Michael Niedermayer <michaelni@gmx.at>

  26.  */

  27. 

  28. #include "h264_high_depth.h"

  29. 

  30. #define op_scale1(x)  block[x] = av_clip_pixel( (block[x]*weight + offset) >> log2_denom )

  31. #define op_scale2(x)  dst[x] = av_clip_pixel( (src[x]*weights + dst[x]*weightd + offset) >> (log2_denom+1))

  32. #define H264_WEIGHT(W,H) \

  33. static void FUNCC(weight_h264_pixels ## W ## x ## H)(uint8_t *p_block, int stride, int log2_denom, int weight, int offset){ \

  34.     int y; \

  35.     pixel *block = (pixel*)p_block; \

  36.     stride >>= sizeof(pixel)-1; \

  37.     offset <<= (log2_denom + (BIT_DEPTH-8)); \

  38.     if(log2_denom) offset += 1<<(log2_denom-1); \

  39.     for(y=0; y<H; y++, block += stride){ \

  40.         op_scale1(0); \

  41.         op_scale1(1); \

  42.         if(W==2) continue; \

  43.         op_scale1(2); \

  44.         op_scale1(3); \

  45.         if(W==4) continue; \

  46.         op_scale1(4); \

  47.         op_scale1(5); \

  48.         op_scale1(6); \

  49.         op_scale1(7); \

  50.         if(W==8) continue; \

  51.         op_scale1(8); \

  52.         op_scale1(9); \

  53.         op_scale1(10); \

  54.         op_scale1(11); \

  55.         op_scale1(12); \

  56.         op_scale1(13); \

  57.         op_scale1(14); \

  58.         op_scale1(15); \

  59.     } \

  60. } \

  61. static void FUNCC(biweight_h264_pixels ## W ## x ## H)(uint8_t *p_dst, uint8_t *p_src, int stride, int log2_denom, int weightd, int weights, int offset){ \

  62.     int y; \

  63.     pixel *dst = (pixel*)p_dst; \

  64.     pixel *src = (pixel*)p_src; \

  65.     stride >>= sizeof(pixel)-1; \

  66.     offset = ((offset + 1) | 1) << log2_denom; \

  67.     for(y=0; y<H; y++, dst += stride, src += stride){ \

  68.         op_scale2(0); \

  69.         op_scale2(1); \

  70.         if(W==2) continue; \

  71.         op_scale2(2); \

  72.         op_scale2(3); \

  73.         if(W==4) continue; \

  74.         op_scale2(4); \

  75.         op_scale2(5); \

  76.         op_scale2(6); \

  77.         op_scale2(7); \

  78.         if(W==8) continue; \

  79.         op_scale2(8); \

  80.         op_scale2(9); \

  81.         op_scale2(10); \

  82.         op_scale2(11); \

  83.         op_scale2(12); \

  84.         op_scale2(13); \

  85.         op_scale2(14); \

  86.         op_scale2(15); \

  87.     } \

  88. }

  89. 

  90. H264_WEIGHT(16,16)

  91. H264_WEIGHT(16,8)

  92. H264_WEIGHT(8,16)

  93. H264_WEIGHT(8,8)

  94. H264_WEIGHT(8,4)

  95. H264_WEIGHT(4,8)

  96. H264_WEIGHT(4,4)

  97. H264_WEIGHT(4,2)

  98. H264_WEIGHT(2,4)

  99. H264_WEIGHT(2,2)

  100. 

  101. #undef op_scale1

  102. #undef op_scale2

  103. #undef H264_WEIGHT

  104. 

  105. static av_always_inline av_flatten void FUNCC(h264_loop_filter_luma)(uint8_t *p_pix, int xstride, int ystride, int alpha, int beta, int8_t *tc0)

  106. {

  107.     pixel *pix = (pixel*)p_pix;

  108.     int i, d;

  109.     xstride >>= sizeof(pixel)-1;

  110.     ystride >>= sizeof(pixel)-1;

  111.     for( i = 0; i < 4; i++ ) {

  112.         if( tc0[i] < 0 ) {

  113.             pix += 4*ystride;

  114.             continue;

  115.         }

  116.         for( d = 0; d < 4; d++ ) {

  117.             const int p0 = pix[-1*xstride];

  118.             const int p1 = pix[-2*xstride];

  119.             const int p2 = pix[-3*xstride];

  120.             const int q0 = pix[0];

  121.             const int q1 = pix[1*xstride];

  122.             const int q2 = pix[2*xstride];

  123. 

  124.             if( FFABS( p0 - q0 ) < alpha &&

  125.                 FFABS( p1 - p0 ) < beta &&

  126.                 FFABS( q1 - q0 ) < beta ) {

  127. 

  128.                 int tc = tc0[i];

  129.                 int i_delta;

  130. 

  131.                 if( FFABS( p2 - p0 ) < beta ) {

  132.                     if(tc0[i])

  133.                     pix[-2*xstride] = p1 + av_clip( (( p2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - p1, -tc0[i], tc0[i] );

  134.                     tc++;

  135.                 }

  136.                 if( FFABS( q2 - q0 ) < beta ) {

  137.                     if(tc0[i])

  138.                     pix[   xstride] = q1 + av_clip( (( q2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - q1, -tc0[i], tc0[i] );

  139.                     tc++;

  140.                 }

  141. 

  142.                 i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );

  143.                 pix[-xstride] = av_clip_pixel( p0 + i_delta );    /* p0' */

  144.                 pix[0]        = av_clip_pixel( q0 - i_delta );    /* q0' */

  145.             }

  146.             pix += ystride;

  147.         }

  148.     }

  149. }

  150. static void FUNCC(h264_v_loop_filter_luma)(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0)

  151. {

  152.     FUNCC(h264_loop_filter_luma)(pix, stride, sizeof(pixel), alpha, beta, tc0);

  153. }

  154. static void FUNCC(h264_h_loop_filter_luma)(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0)

  155. {

  156.     FUNCC(h264_loop_filter_luma)(pix, sizeof(pixel), stride, alpha, beta, tc0);

  157. }

  158. 

  159. static av_always_inline av_flatten void FUNCC(h264_loop_filter_luma_intra)(uint8_t *p_pix, int xstride, int ystride, int alpha, int beta)

  160. {

  161.     pixel *pix = (pixel*)p_pix;

  162.     int d;

  163.     xstride >>= sizeof(pixel)-1;

  164.     ystride >>= sizeof(pixel)-1;

  165.     for( d = 0; d < 16; d++ ) {

  166.         const int p2 = pix[-3*xstride];

  167.         const int p1 = pix[-2*xstride];

  168.         const int p0 = pix[-1*xstride];

  169. 

  170.         const int q0 = pix[ 0*xstride];

  171.         const int q1 = pix[ 1*xstride];

  172.         const int q2 = pix[ 2*xstride];

  173. 

  174.         if( FFABS( p0 - q0 ) < alpha &&

  175.             FFABS( p1 - p0 ) < beta &&

  176.             FFABS( q1 - q0 ) < beta ) {

  177. 

  178.             if(FFABS( p0 - q0 ) < (( alpha >> 2 ) + 2 )){

  179.                 if( FFABS( p2 - p0 ) < beta)

  180.                 {

  181.                     const int p3 = pix[-4*xstride];

  182.                     /* p0', p1', p2' */

  183.                     pix[-1*xstride] = ( p2 + 2*p1 + 2*p0 + 2*q0 + q1 + 4 ) >> 3;

  184.                     pix[-2*xstride] = ( p2 + p1 + p0 + q0 + 2 ) >> 2;

  185.                     pix[-3*xstride] = ( 2*p3 + 3*p2 + p1 + p0 + q0 + 4 ) >> 3;

  186.                 } else {

  187.                     /* p0' */

  188.                     pix[-1*xstride] = ( 2*p1 + p0 + q1 + 2 ) >> 2;

  189.                 }

  190.                 if( FFABS( q2 - q0 ) < beta)

  191.                 {

  192.                     const int q3 = pix[3*xstride];

  193.                     /* q0', q1', q2' */

  194.                     pix[0*xstride] = ( p1 + 2*p0 + 2*q0 + 2*q1 + q2 + 4 ) >> 3;

  195.                     pix[1*xstride] = ( p0 + q0 + q1 + q2 + 2 ) >> 2;

  196.                     pix[2*xstride] = ( 2*q3 + 3*q2 + q1 + q0 + p0 + 4 ) >> 3;

  197.                 } else {

  198.                     /* q0' */

  199.                     pix[0*xstride] = ( 2*q1 + q0 + p1 + 2 ) >> 2;

  200.                 }

  201.             }else{

  202.                 /* p0', q0' */

  203.                 pix[-1*xstride] = ( 2*p1 + p0 + q1 + 2 ) >> 2;

  204.                 pix[ 0*xstride] = ( 2*q1 + q0 + p1 + 2 ) >> 2;

  205.             }

  206.         }

  207.         pix += ystride;

  208.     }

  209. }

  210. static void FUNCC(h264_v_loop_filter_luma_intra)(uint8_t *pix, int stride, int alpha, int beta)

  211. {

  212.     FUNCC(h264_loop_filter_luma_intra)(pix, stride, sizeof(pixel), alpha, beta);

  213. }

  214. static void FUNCC(h264_h_loop_filter_luma_intra)(uint8_t *pix, int stride, int alpha, int beta)

  215. {

  216.     FUNCC(h264_loop_filter_luma_intra)(pix, sizeof(pixel), stride, alpha, beta);

  217. }

  218. 

  219. static av_always_inline av_flatten void FUNCC(h264_loop_filter_chroma)(uint8_t *p_pix, int xstride, int ystride, int alpha, int beta, int8_t *tc0)

  220. {

  221.     pixel *pix = (pixel*)p_pix;

  222.     int i, d;

  223.     xstride >>= sizeof(pixel)-1;

  224.     ystride >>= sizeof(pixel)-1;

  225.     for( i = 0; i < 4; i++ ) {

  226.         const int tc = tc0[i];

  227.         if( tc <= 0 ) {

  228.             pix += 2*ystride;

  229.             continue;

  230.         }

  231.         for( d = 0; d < 2; d++ ) {

  232.             const int p0 = pix[-1*xstride];

  233.             const int p1 = pix[-2*xstride];

  234.             const int q0 = pix[0];

  235.             const int q1 = pix[1*xstride];

  236. 

  237.             if( FFABS( p0 - q0 ) < alpha &&

  238.                 FFABS( p1 - p0 ) < beta &&

  239.                 FFABS( q1 - q0 ) < beta ) {

  240. 

  241.                 int delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );

  242. 

  243.                 pix[-xstride] = av_clip_pixel( p0 + delta );    /* p0' */

  244.                 pix[0]        = av_clip_pixel( q0 - delta );    /* q0' */

  245.             }

  246.             pix += ystride;

  247.         }

  248.     }

  249. }

  250. static void FUNCC(h264_v_loop_filter_chroma)(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0)

  251. {

  252.     FUNCC(h264_loop_filter_chroma)(pix, stride, sizeof(pixel), alpha, beta, tc0);

  253. }

  254. static void FUNCC(h264_h_loop_filter_chroma)(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0)

  255. {

  256.     FUNCC(h264_loop_filter_chroma)(pix, sizeof(pixel), stride, alpha, beta, tc0);

  257. }

  258. 

  259. static av_always_inline av_flatten void FUNCC(h264_loop_filter_chroma_intra)(uint8_t *p_pix, int xstride, int ystride, int alpha, int beta)

  260. {

  261.     pixel *pix = (pixel*)p_pix;

  262.     int d;

  263.     xstride >>= sizeof(pixel)-1;

  264.     ystride >>= sizeof(pixel)-1;

  265.     for( d = 0; d < 8; d++ ) {

  266.         const int p0 = pix[-1*xstride];

  267.         const int p1 = pix[-2*xstride];

  268.         const int q0 = pix[0];

  269.         const int q1 = pix[1*xstride];

  270. 

  271.         if( FFABS( p0 - q0 ) < alpha &&

  272.             FFABS( p1 - p0 ) < beta &&

  273.             FFABS( q1 - q0 ) < beta ) {

  274. 

  275.             pix[-xstride] = ( 2*p1 + p0 + q1 + 2 ) >> 2;   /* p0' */

  276.             pix[0]        = ( 2*q1 + q0 + p1 + 2 ) >> 2;   /* q0' */

  277.         }

  278.         pix += ystride;

  279.     }

  280. }

  281. static void FUNCC(h264_v_loop_filter_chroma_intra)(uint8_t *pix, int stride, int alpha, int beta)

  282. {

  283.     FUNCC(h264_loop_filter_chroma_intra)(pix, stride, sizeof(pixel), alpha, beta);

  284. }

  285. static void FUNCC(h264_h_loop_filter_chroma_intra)(uint8_t *pix, int stride, int alpha, int beta)

  286. {

  287.     FUNCC(h264_loop_filter_chroma_intra)(pix, sizeof(pixel), stride, alpha, beta);

  288. }