/* * 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, HAP_FMT_RGTC1 = 0x01, }; 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; uint32_t 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 opt_compressor; /* User-requested compressor (encoder only) */ int chunk_count; HapChunk *chunks; int *chunk_results; /* Results from threaded operations */ int tex_rat; /* Compression ratio */ int tex_rat2; /* Compression ratio of the second texture */ 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 */ int texture_count; /* 2 for HAQA, 1 for other version */ int texture_section_size; /* size of the part of the texture section (for HAPQA) */ int uncompress_pix_size; /* nb of byte / pixel for the target picture */ /* Pointer to the selected compress or decompress function */ int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); int (*tex_fun2)(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); /* The first three bytes are the size of the section past the header, or zero * if the length is stored in the next long word. The fourth byte in the first * long word indicates the type of the current section. */ int ff_hap_parse_section_header(GetByteContext *gbc, int *section_size, enum HapSectionType *section_type); #endif /* AVCODEC_HAP_H */