/*
  * Vidvox Hap
  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>

  * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>

  *

  * 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
  */
 
 #ifndef AVCODEC_HAP_H
 #define AVCODEC_HAP_H
 
 #include <stdint.h>
 
 #include "libavutil/opt.h"
 
 #include "bytestream.h"
 #include "texturedsp.h"
 

 enum HapTextureFormat {
     HAP_FMT_RGBDXT1   = 0x0B,
     HAP_FMT_RGBADXT5  = 0x0E,
     HAP_FMT_YCOCGDXT5 = 0x0F,
 };
 
 enum HapCompressor {
     HAP_COMP_NONE    = 0xA0,
     HAP_COMP_SNAPPY  = 0xB0,
     HAP_COMP_COMPLEX = 0xC0,
 };
 

 enum HapSectionType {
     HAP_ST_DECODE_INSTRUCTIONS = 0x01,
     HAP_ST_COMPRESSOR_TABLE    = 0x02,
     HAP_ST_SIZE_TABLE          = 0x03,
     HAP_ST_OFFSET_TABLE        = 0x04,
 };
 
 typedef struct HapChunk {
     enum HapCompressor compressor;
     int compressed_offset;
     size_t compressed_size;
     int uncompressed_offset;
     size_t uncompressed_size;
 } HapChunk;
 

 typedef struct HapContext {
     AVClass *class;
 
     TextureDSPContext dxtc;
     GetByteContext gbc;
 

     enum HapTextureFormat opt_tex_fmt; /* Texture type (encoder only) */
     int opt_chunk_count; /* User-requested chunk count (encoder only) */
 
     int chunk_count;
     HapChunk *chunks;
     int *chunk_results;      /* Results from threaded operations */

 
     int tex_rat;             /* Compression ratio */
     const uint8_t *tex_data; /* Compressed texture */

     uint8_t *tex_buf;        /* Buffer for compressed texture */

     size_t tex_size;         /* Size of the compressed texture */
 
     size_t max_snappy;       /* Maximum compressed size for snappy buffer */
 

     int slice_count;         /* Number of slices for threaded operations */

     /* Pointer to the selected compress or decompress function */
     int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
 } HapContext;
 

 /*
  * Set the number of chunks in the frame. Returns 0 on success or an error if:
  * - first_in_frame is 0 and the number of chunks has changed
  * - any other error occurs
  */
 int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame);

 /*
  * Free resources associated with the context
  */
 av_cold void ff_hap_free_context(HapContext *ctx);
 

 #endif /* AVCODEC_HAP_H */