/*
  * Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
  *
  * 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

  * H.264 DSP functions.
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
 #ifndef AVCODEC_H264DSP_H
 #define AVCODEC_H264DSP_H
 
 #include <stdint.h>

 typedef void (*h264_weight_func)(uint8_t *block, int stride, int height,
                                  int log2_denom, int weight, int offset);

 typedef void (*h264_biweight_func)(uint8_t *dst, uint8_t *src,
                                    int stride, int height, int log2_denom,
                                    int weightd, int weights, int offset);

 
 /**
  * Context for storing H.264 DSP functions
  */

 typedef struct H264DSPContext {

     /* weighted MC */

     h264_weight_func weight_h264_pixels_tab[4];
     h264_biweight_func biweight_h264_pixels_tab[4];

 
     /* loop filter */

     void (*h264_v_loop_filter_luma)(uint8_t *pix /*align 16*/, int stride,
                                     int alpha, int beta, int8_t *tc0);
     void (*h264_h_loop_filter_luma)(uint8_t *pix /*align 4 */, int stride,
                                     int alpha, int beta, int8_t *tc0);
     void (*h264_h_loop_filter_luma_mbaff)(uint8_t *pix /*align 16*/, int stride,
                                           int alpha, int beta, int8_t *tc0);

     /* v/h_loop_filter_luma_intra: align 16 */

     void (*h264_v_loop_filter_luma_intra)(uint8_t *pix, int stride,
                                           int alpha, int beta);
     void (*h264_h_loop_filter_luma_intra)(uint8_t *pix, int stride,
                                           int alpha, int beta);
     void (*h264_h_loop_filter_luma_mbaff_intra)(uint8_t *pix /*align 16*/,
                                                 int stride, int alpha, int beta);
     void (*h264_v_loop_filter_chroma)(uint8_t *pix /*align 8*/, int stride,
                                       int alpha, int beta, int8_t *tc0);
     void (*h264_h_loop_filter_chroma)(uint8_t *pix /*align 4*/, int stride,
                                       int alpha, int beta, int8_t *tc0);
     void (*h264_h_loop_filter_chroma_mbaff)(uint8_t *pix /*align 8*/,
                                             int stride, int alpha, int beta,
                                             int8_t *tc0);
     void (*h264_v_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
                                             int stride, int alpha, int beta);
     void (*h264_h_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
                                             int stride, int alpha, int beta);
     void (*h264_h_loop_filter_chroma_mbaff_intra)(uint8_t *pix /*align 8*/,
                                                   int stride, int alpha, int beta);

     // h264_loop_filter_strength: simd only. the C version is inlined in h264.c

     void (*h264_loop_filter_strength)(int16_t bS[2][4][4], uint8_t nnz[40],
                                       int8_t ref[2][40], int16_t mv[2][40][2],
                                       int bidir, int edges, int step,
                                       int mask_mv0, int mask_mv1, int field);

 
     /* IDCT */

     void (*h264_idct_add)(uint8_t *dst /*align 4*/,

                           int16_t *block /*align 16*/, int stride);

     void (*h264_idct8_add)(uint8_t *dst /*align 8*/,

                            int16_t *block /*align 16*/, int stride);

     void (*h264_idct_dc_add)(uint8_t *dst /*align 4*/,

                              int16_t *block /*align 16*/, int stride);

     void (*h264_idct8_dc_add)(uint8_t *dst /*align 8*/,

                               int16_t *block /*align 16*/, int stride);

     void (*h264_idct_add16)(uint8_t *dst /*align 16*/, const int *blockoffset,

                             int16_t *block /*align 16*/, int stride,

                             const uint8_t nnzc[15 * 8]);
     void (*h264_idct8_add4)(uint8_t *dst /*align 16*/, const int *blockoffset,

                             int16_t *block /*align 16*/, int stride,

                             const uint8_t nnzc[15 * 8]);
     void (*h264_idct_add8)(uint8_t **dst /*align 16*/, const int *blockoffset,

                            int16_t *block /*align 16*/, int stride,

                            const uint8_t nnzc[15 * 8]);
     void (*h264_idct_add16intra)(uint8_t *dst /*align 16*/, const int *blockoffset,

                                  int16_t *block /*align 16*/,

                                  int stride, const uint8_t nnzc[15 * 8]);

     void (*h264_luma_dc_dequant_idct)(int16_t *output,
                                       int16_t *input /*align 16*/, int qmul);
     void (*h264_chroma_dc_dequant_idct)(int16_t *block, int qmul);

 
     /* bypass-transform */

     void (*h264_add_pixels8_clear)(uint8_t *dst, int16_t *block, int stride);
     void (*h264_add_pixels4_clear)(uint8_t *dst, int16_t *block, int stride);

 
     /**
      * Search buf from the start for up to size bytes. Return the index
      * of a zero byte, or >= size if not found. Ideally, use lookahead
      * to filter out any zero bytes that are known to not be followed by
      * one or more further zero bytes and a one byte. Better still, filter
      * out any bytes that form the trailing_zero_8bits syntax element too.
      */
     int (*h264_find_start_code_candidate)(const uint8_t *buf, int size);

 } H264DSPContext;

 void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
                      const int chroma_format_idc);
 void ff_h264dsp_init_arm(H264DSPContext *c, const int bit_depth,
                          const int chroma_format_idc);
 void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
                          const int chroma_format_idc);
 void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
                          const int chroma_format_idc);

 
 #endif /* AVCODEC_H264DSP_H */