libavcodec/h264_mb_template.c
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 /*
  * H.26L/H.264/AVC/JVT/14496-10/... decoder
  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
  *
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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
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
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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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * 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
  */
 
 #undef FUNC
 #undef PIXEL_SHIFT
 
 #if SIMPLE
 #   define FUNC(n) AV_JOIN(n ## _simple_, BITS)
 #   define PIXEL_SHIFT (BITS >> 4)
 #else
 #   define FUNC(n) n ## _complex
 #   define PIXEL_SHIFT h->pixel_shift
 #endif
 
 #undef  CHROMA_IDC
 #define CHROMA_IDC 1
 #include "h264_mc_template.c"
 
 #undef  CHROMA_IDC
 #define CHROMA_IDC 2
 #include "h264_mc_template.c"
 
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 static av_noinline void FUNC(hl_decode_mb)(const H264Context *h, H264SliceContext *sl)
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 {
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     const int mb_x    = sl->mb_x;
     const int mb_y    = sl->mb_y;
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     const int mb_xy   = sl->mb_xy;
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     const int mb_type = h->cur_pic.mb_type[mb_xy];
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     uint8_t *dest_y, *dest_cb, *dest_cr;
     int linesize, uvlinesize /*dct_offset*/;
     int i, j;
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     const int *block_offset = &h->block_offset[0];
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     const int transform_bypass = !SIMPLE && (sl->qscale == 0 && h->ps.sps->transform_bypass);
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     void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
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     const int block_h   = 16 >> h->chroma_y_shift;
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     const int chroma422 = CHROMA422(h);
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     dest_y  = h->cur_pic.f->data[0] + ((mb_x << PIXEL_SHIFT)     + mb_y * sl->linesize)  * 16;
     dest_cb = h->cur_pic.f->data[1] +  (mb_x << PIXEL_SHIFT) * 8 + mb_y * sl->uvlinesize * block_h;
     dest_cr = h->cur_pic.f->data[2] +  (mb_x << PIXEL_SHIFT) * 8 + mb_y * sl->uvlinesize * block_h;
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     h->vdsp.prefetch(dest_y  + (sl->mb_x & 3) * 4 * sl->linesize   + (64 << PIXEL_SHIFT), sl->linesize,       4);
     h->vdsp.prefetch(dest_cb + (sl->mb_x & 7)     * sl->uvlinesize + (64 << PIXEL_SHIFT), dest_cr - dest_cb, 2);
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     h->list_counts[mb_xy] = sl->list_count;
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     if (!SIMPLE && MB_FIELD(sl)) {
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         linesize     = sl->mb_linesize = sl->linesize * 2;
         uvlinesize   = sl->mb_uvlinesize = sl->uvlinesize * 2;
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         block_offset = &h->block_offset[48];
         if (mb_y & 1) { // FIXME move out of this function?
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             dest_y  -= sl->linesize * 15;
             dest_cb -= sl->uvlinesize * (block_h - 1);
             dest_cr -= sl->uvlinesize * (block_h - 1);
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         }
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         if (FRAME_MBAFF(h)) {
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             int list;
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             for (list = 0; list < sl->list_count; list++) {
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                 if (!USES_LIST(mb_type, list))
                     continue;
                 if (IS_16X16(mb_type)) {
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                     int8_t *ref = &sl->ref_cache[list][scan8[0]];
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                     fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (sl->mb_y & 1), 1);
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                 } else {
                     for (i = 0; i < 16; i += 4) {
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                         int ref = sl->ref_cache[list][scan8[i]];
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                         if (ref >= 0)
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                             fill_rectangle(&sl->ref_cache[list][scan8[i]], 2, 2,
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                                            8, (16 + ref) ^ (sl->mb_y & 1), 1);
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                     }
                 }
             }
         }
     } else {
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         linesize   = sl->mb_linesize   = sl->linesize;
         uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
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         // dct_offset = s->linesize * 16;
     }
 
     if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
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         const int bit_depth = h->ps.sps->bit_depth_luma;
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         if (PIXEL_SHIFT) {
             int j;
             GetBitContext gb;
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             init_get_bits(&gb, sl->intra_pcm_ptr,
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                           ff_h264_mb_sizes[h->ps.sps->chroma_format_idc] * bit_depth);
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             for (i = 0; i < 16; i++) {
                 uint16_t *tmp_y = (uint16_t *)(dest_y + i * linesize);
                 for (j = 0; j < 16; j++)
                     tmp_y[j] = get_bits(&gb, bit_depth);
             }
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             if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
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                 if (!h->ps.sps->chroma_format_idc) {
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                     for (i = 0; i < block_h; i++) {
                         uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
                         uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
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                         for (j = 0; j < 8; j++) {
                             tmp_cb[j] = tmp_cr[j] = 1 << (bit_depth - 1);
                         }
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                     }
                 } else {
                     for (i = 0; i < block_h; i++) {
                         uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
                         for (j = 0; j < 8; j++)
                             tmp_cb[j] = get_bits(&gb, bit_depth);
                     }
                     for (i = 0; i < block_h; i++) {
                         uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
                         for (j = 0; j < 8; j++)
                             tmp_cr[j] = get_bits(&gb, bit_depth);
                     }
                 }
             }
         } else {
             for (i = 0; i < 16; i++)
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                 memcpy(dest_y + i * linesize, sl->intra_pcm_ptr + i * 16, 16);
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             if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
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                 if (!h->ps.sps->chroma_format_idc) {
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                     for (i = 0; i < 8; i++) {
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                         memset(dest_cb + i * uvlinesize, 1 << (bit_depth - 1), 8);
                         memset(dest_cr + i * uvlinesize, 1 << (bit_depth - 1), 8);
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                     }
                 } else {
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                     const uint8_t *src_cb = sl->intra_pcm_ptr + 256;
                     const uint8_t *src_cr = sl->intra_pcm_ptr + 256 + block_h * 8;
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                     for (i = 0; i < block_h; i++) {
                         memcpy(dest_cb + i * uvlinesize, src_cb + i * 8, 8);
                         memcpy(dest_cr + i * uvlinesize, src_cr + i * 8, 8);
                     }
                 }
             }
         }
     } else {
         if (IS_INTRA(mb_type)) {
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             if (sl->deblocking_filter)
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                 xchg_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
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                                uvlinesize, 1, 0, SIMPLE, PIXEL_SHIFT);
 
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             if (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
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                 h->hpc.pred8x8[sl->chroma_pred_mode](dest_cb, uvlinesize);
                 h->hpc.pred8x8[sl->chroma_pred_mode](dest_cr, uvlinesize);
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             }
 
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             hl_decode_mb_predict_luma(h, sl, mb_type, SIMPLE,
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                                       transform_bypass, PIXEL_SHIFT,
                                       block_offset, linesize, dest_y, 0);
 
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             if (sl->deblocking_filter)
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                 xchg_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
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                                uvlinesize, 0, 0, SIMPLE, PIXEL_SHIFT);
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         } else {
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             if (chroma422) {
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                 FUNC(hl_motion_422)(h, sl, dest_y, dest_cb, dest_cr,
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                               h->h264qpel.put_h264_qpel_pixels_tab,
                               h->h264chroma.put_h264_chroma_pixels_tab,
                               h->h264qpel.avg_h264_qpel_pixels_tab,
                               h->h264chroma.avg_h264_chroma_pixels_tab,
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                               h->h264dsp.weight_h264_pixels_tab,
                               h->h264dsp.biweight_h264_pixels_tab);
             } else {
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                 FUNC(hl_motion_420)(h, sl, dest_y, dest_cb, dest_cr,
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                               h->h264qpel.put_h264_qpel_pixels_tab,
                               h->h264chroma.put_h264_chroma_pixels_tab,
                               h->h264qpel.avg_h264_qpel_pixels_tab,
                               h->h264chroma.avg_h264_chroma_pixels_tab,
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                               h->h264dsp.weight_h264_pixels_tab,
                               h->h264dsp.biweight_h264_pixels_tab);
             }
         }
 
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         hl_decode_mb_idct_luma(h, sl, mb_type, SIMPLE, transform_bypass,
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                                PIXEL_SHIFT, block_offset, linesize, dest_y, 0);
 
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         if ((SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) &&
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             (sl->cbp & 0x30)) {
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             uint8_t *dest[2] = { dest_cb, dest_cr };
             if (transform_bypass) {
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                 if (IS_INTRA(mb_type) && h->ps.sps->profile_idc == 244 &&
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                     (sl->chroma_pred_mode == VERT_PRED8x8 ||
                      sl->chroma_pred_mode == HOR_PRED8x8)) {
                     h->hpc.pred8x8_add[sl->chroma_pred_mode](dest[0],
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                                                             block_offset + 16,
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                                                             sl->mb + (16 * 16 * 1 << PIXEL_SHIFT),
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                                                             uvlinesize);
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                     h->hpc.pred8x8_add[sl->chroma_pred_mode](dest[1],
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                                                             block_offset + 32,
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                                                             sl->mb + (16 * 16 * 2 << PIXEL_SHIFT),
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                                                             uvlinesize);
                 } else {
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                     idct_add = h->h264dsp.h264_add_pixels4_clear;
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                     for (j = 1; j < 3; j++) {
                         for (i = j * 16; i < j * 16 + 4; i++)
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                             if (sl->non_zero_count_cache[scan8[i]] ||
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                                 dctcoef_get(sl->mb, PIXEL_SHIFT, i * 16))
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                                 idct_add(dest[j - 1] + block_offset[i],
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                                          sl->mb + (i * 16 << PIXEL_SHIFT),
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                                          uvlinesize);
                         if (chroma422) {
                             for (i = j * 16 + 4; i < j * 16 + 8; i++)
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                                 if (sl->non_zero_count_cache[scan8[i + 4]] ||
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                                     dctcoef_get(sl->mb, PIXEL_SHIFT, i * 16))
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                                     idct_add(dest[j - 1] + block_offset[i + 4],
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                                              sl->mb + (i * 16 << PIXEL_SHIFT),
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                                              uvlinesize);
                         }
                     }
                 }
             } else {
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                 int qp[2];
                 if (chroma422) {
                     qp[0] = sl->chroma_qp[0] + 3;
                     qp[1] = sl->chroma_qp[1] + 3;
                 } else {
                     qp[0] = sl->chroma_qp[0];
                     qp[1] = sl->chroma_qp[1];
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                 }
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                 if (sl->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 0]])
                     h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + (16 * 16 * 1 << PIXEL_SHIFT),
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                                                            h->ps.pps->dequant4_coeff[IS_INTRA(mb_type) ? 1 : 4][qp[0]][0]);
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                 if (sl->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 1]])
                     h->h264dsp.h264_chroma_dc_dequant_idct(sl->mb + (16 * 16 * 2 << PIXEL_SHIFT),
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                                                            h->ps.pps->dequant4_coeff[IS_INTRA(mb_type) ? 2 : 5][qp[1]][0]);
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                 h->h264dsp.h264_idct_add8(dest, block_offset,
                                           sl->mb, uvlinesize,
                                           sl->non_zero_count_cache);
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             }
         }
     }
 }
 
 #if !SIMPLE || BITS == 8
 
 #undef  CHROMA_IDC
 #define CHROMA_IDC 3
 #include "h264_mc_template.c"
 
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 static av_noinline void FUNC(hl_decode_mb_444)(const H264Context *h, H264SliceContext *sl)
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 {
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     const int mb_x    = sl->mb_x;
     const int mb_y    = sl->mb_y;
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     const int mb_xy   = sl->mb_xy;
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     const int mb_type = h->cur_pic.mb_type[mb_xy];
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     uint8_t *dest[3];
     int linesize;
     int i, j, p;
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     const int *block_offset = &h->block_offset[0];
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     const int transform_bypass = !SIMPLE && (sl->qscale == 0 && h->ps.sps->transform_bypass);
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     const int plane_count      = (SIMPLE || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) ? 3 : 1;
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     for (p = 0; p < plane_count; p++) {
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         dest[p] = h->cur_pic.f->data[p] +
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                   ((mb_x << PIXEL_SHIFT) + mb_y * sl->linesize) * 16;
         h->vdsp.prefetch(dest[p] + (sl->mb_x & 3) * 4 * sl->linesize + (64 << PIXEL_SHIFT),
                          sl->linesize, 4);
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     }
 
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     h->list_counts[mb_xy] = sl->list_count;
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     if (!SIMPLE && MB_FIELD(sl)) {
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         linesize     = sl->mb_linesize = sl->mb_uvlinesize = sl->linesize * 2;
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         block_offset = &h->block_offset[48];
         if (mb_y & 1) // FIXME move out of this function?
             for (p = 0; p < 3; p++)
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                 dest[p] -= sl->linesize * 15;
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         if (FRAME_MBAFF(h)) {
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             int list;
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             for (list = 0; list < sl->list_count; list++) {
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                 if (!USES_LIST(mb_type, list))
                     continue;
                 if (IS_16X16(mb_type)) {
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                     int8_t *ref = &sl->ref_cache[list][scan8[0]];
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                     fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (sl->mb_y & 1), 1);
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                 } else {
                     for (i = 0; i < 16; i += 4) {
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                         int ref = sl->ref_cache[list][scan8[i]];
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                         if (ref >= 0)
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                             fill_rectangle(&sl->ref_cache[list][scan8[i]], 2, 2,
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                                            8, (16 + ref) ^ (sl->mb_y & 1), 1);
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                     }
                 }
             }
         }
     } else {
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         linesize = sl->mb_linesize = sl->mb_uvlinesize = sl->linesize;
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     }
 
     if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
         if (PIXEL_SHIFT) {
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             const int bit_depth = h->ps.sps->bit_depth_luma;
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             GetBitContext gb;
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             init_get_bits(&gb, sl->intra_pcm_ptr, 768 * bit_depth);
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             for (p = 0; p < plane_count; p++)
                 for (i = 0; i < 16; i++) {
                     uint16_t *tmp = (uint16_t *)(dest[p] + i * linesize);
                     for (j = 0; j < 16; j++)
                         tmp[j] = get_bits(&gb, bit_depth);
                 }
         } else {
             for (p = 0; p < plane_count; p++)
                 for (i = 0; i < 16; i++)
                     memcpy(dest[p] + i * linesize,
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                            sl->intra_pcm_ptr + p * 256 + i * 16, 16);
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         }
     } else {
         if (IS_INTRA(mb_type)) {
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             if (sl->deblocking_filter)
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                 xchg_mb_border(h, sl, dest[0], dest[1], dest[2], linesize,
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                                linesize, 1, 1, SIMPLE, PIXEL_SHIFT);
 
             for (p = 0; p < plane_count; p++)
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                 hl_decode_mb_predict_luma(h, sl, mb_type, SIMPLE,
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                                           transform_bypass, PIXEL_SHIFT,
                                           block_offset, linesize, dest[p], p);
 
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             if (sl->deblocking_filter)
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                 xchg_mb_border(h, sl, dest[0], dest[1], dest[2], linesize,
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                                linesize, 0, 1, SIMPLE, PIXEL_SHIFT);
         } else {
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             FUNC(hl_motion_444)(h, sl, dest[0], dest[1], dest[2],
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                       h->h264qpel.put_h264_qpel_pixels_tab,
                       h->h264chroma.put_h264_chroma_pixels_tab,
                       h->h264qpel.avg_h264_qpel_pixels_tab,
                       h->h264chroma.avg_h264_chroma_pixels_tab,
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                       h->h264dsp.weight_h264_pixels_tab,
                       h->h264dsp.biweight_h264_pixels_tab);
         }
 
         for (p = 0; p < plane_count; p++)
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             hl_decode_mb_idct_luma(h, sl, mb_type, SIMPLE, transform_bypass,
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                                    PIXEL_SHIFT, block_offset, linesize,
                                    dest[p], p);
     }
 }
 
 #endif