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ffmpeg-4.2.2/libavcodec/vp8dsp.h 4.7 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Copyright (C) 2010 David Conrad
   * Copyright (C) 2010 Ronald S. Bultje
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * 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.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * 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
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  /**
   * @file
   * VP8 compatible video decoder
   */
  
  #ifndef AVCODEC_VP8DSP_H
  #define AVCODEC_VP8DSP_H
  
  #include <stddef.h>
  #include <stdint.h>
  
  typedef void (*vp8_mc_func)(uint8_t *dst /* align 8 */, ptrdiff_t dstStride,
                              uint8_t *src /* align 1 */, ptrdiff_t srcStride,
                              int h, int x, int y);
  
  typedef struct VP8DSPContext {
      void (*vp8_luma_dc_wht)(int16_t block[4][4][16], int16_t dc[16]);
      void (*vp8_luma_dc_wht_dc)(int16_t block[4][4][16], int16_t dc[16]);
      void (*vp8_idct_add)(uint8_t *dst, int16_t block[16], ptrdiff_t stride);
      void (*vp8_idct_dc_add)(uint8_t *dst, int16_t block[16], ptrdiff_t stride);
      void (*vp8_idct_dc_add4y)(uint8_t *dst, int16_t block[4][16],
                                ptrdiff_t stride);
      void (*vp8_idct_dc_add4uv)(uint8_t *dst, int16_t block[4][16],
                                 ptrdiff_t stride);
  
      // loop filter applied to edges between macroblocks
      void (*vp8_v_loop_filter16y)(uint8_t *dst, ptrdiff_t stride,
                                   int flim_E, int flim_I, int hev_thresh);
      void (*vp8_h_loop_filter16y)(uint8_t *dst, ptrdiff_t stride,
                                   int flim_E, int flim_I, int hev_thresh);
      void (*vp8_v_loop_filter8uv)(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,
                                   int flim_E, int flim_I, int hev_thresh);
      void (*vp8_h_loop_filter8uv)(uint8_t *dstU, uint8_t *dstV, ptrdiff_t stride,
                                   int flim_E, int flim_I, int hev_thresh);
  
      // loop filter applied to inner macroblock edges
      void (*vp8_v_loop_filter16y_inner)(uint8_t *dst, ptrdiff_t stride,
                                         int flim_E, int flim_I, int hev_thresh);
      void (*vp8_h_loop_filter16y_inner)(uint8_t *dst, ptrdiff_t stride,
                                         int flim_E, int flim_I, int hev_thresh);
      void (*vp8_v_loop_filter8uv_inner)(uint8_t *dstU, uint8_t *dstV,
                                         ptrdiff_t stride,
                                         int flim_E, int flim_I, int hev_thresh);
      void (*vp8_h_loop_filter8uv_inner)(uint8_t *dstU, uint8_t *dstV,
                                         ptrdiff_t stride,
                                         int flim_E, int flim_I, int hev_thresh);
  
      void (*vp8_v_loop_filter_simple)(uint8_t *dst, ptrdiff_t stride, int flim);
      void (*vp8_h_loop_filter_simple)(uint8_t *dst, ptrdiff_t stride, int flim);
  
      /**
       * first dimension: 4-log2(width)
       * second dimension: 0 if no vertical interpolation is needed;
       *                   1 4-tap vertical interpolation filter (my & 1)
       *                   2 6-tap vertical interpolation filter (!(my & 1))
       * third dimension: same as second dimension, for horizontal interpolation
       * so something like put_vp8_epel_pixels_tab[4-log2(width)][2*!!my-(my&1)][2*!!mx-(mx&1)](..., mx, my)
       */
      vp8_mc_func put_vp8_epel_pixels_tab[3][3][3];
      vp8_mc_func put_vp8_bilinear_pixels_tab[3][3][3];
  } VP8DSPContext;
  
  void ff_put_vp8_pixels16_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                             int h, int x, int y);
  void ff_put_vp8_pixels8_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                            int h, int x, int y);
  void ff_put_vp8_pixels4_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                            int h, int x, int y);
  
  void ff_vp7dsp_init(VP8DSPContext *c);
  
  void ff_vp78dsp_init(VP8DSPContext *c);
  void ff_vp78dsp_init_aarch64(VP8DSPContext *c);
  void ff_vp78dsp_init_arm(VP8DSPContext *c);
  void ff_vp78dsp_init_ppc(VP8DSPContext *c);
  void ff_vp78dsp_init_x86(VP8DSPContext *c);
  
  void ff_vp8dsp_init(VP8DSPContext *c);
  void ff_vp8dsp_init_aarch64(VP8DSPContext *c);
  void ff_vp8dsp_init_arm(VP8DSPContext *c);
  void ff_vp8dsp_init_x86(VP8DSPContext *c);
  void ff_vp8dsp_init_mips(VP8DSPContext *c);
  
  #define IS_VP7 1
  #define IS_VP8 0
  
  #endif /* AVCODEC_VP8DSP_H */