blob: f39e621805fe7d78ece58a6597402d0064eb9029
| 1 | /* |
| 2 | * Vidvox Hap |
| 3 | * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com> |
| 4 | * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com> |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #ifndef AVCODEC_HAP_H |
| 24 | #define AVCODEC_HAP_H |
| 25 | |
| 26 | #include <stdint.h> |
| 27 | |
| 28 | #include "libavutil/opt.h" |
| 29 | |
| 30 | #include "bytestream.h" |
| 31 | #include "texturedsp.h" |
| 32 | |
| 33 | enum HapTextureFormat { |
| 34 | HAP_FMT_RGBDXT1 = 0x0B, |
| 35 | HAP_FMT_RGBADXT5 = 0x0E, |
| 36 | HAP_FMT_YCOCGDXT5 = 0x0F, |
| 37 | }; |
| 38 | |
| 39 | enum HapCompressor { |
| 40 | HAP_COMP_NONE = 0xA0, |
| 41 | HAP_COMP_SNAPPY = 0xB0, |
| 42 | HAP_COMP_COMPLEX = 0xC0, |
| 43 | }; |
| 44 | |
| 45 | enum HapSectionType { |
| 46 | HAP_ST_DECODE_INSTRUCTIONS = 0x01, |
| 47 | HAP_ST_COMPRESSOR_TABLE = 0x02, |
| 48 | HAP_ST_SIZE_TABLE = 0x03, |
| 49 | HAP_ST_OFFSET_TABLE = 0x04, |
| 50 | }; |
| 51 | |
| 52 | typedef struct HapChunk { |
| 53 | enum HapCompressor compressor; |
| 54 | int compressed_offset; |
| 55 | size_t compressed_size; |
| 56 | int uncompressed_offset; |
| 57 | size_t uncompressed_size; |
| 58 | } HapChunk; |
| 59 | |
| 60 | typedef struct HapContext { |
| 61 | AVClass *class; |
| 62 | |
| 63 | TextureDSPContext dxtc; |
| 64 | GetByteContext gbc; |
| 65 | |
| 66 | enum HapTextureFormat opt_tex_fmt; /* Texture type (encoder only) */ |
| 67 | int opt_chunk_count; /* User-requested chunk count (encoder only) */ |
| 68 | int opt_compressor; /* User-requested compressor (encoder only) */ |
| 69 | |
| 70 | int chunk_count; |
| 71 | HapChunk *chunks; |
| 72 | int *chunk_results; /* Results from threaded operations */ |
| 73 | |
| 74 | int tex_rat; /* Compression ratio */ |
| 75 | const uint8_t *tex_data; /* Compressed texture */ |
| 76 | uint8_t *tex_buf; /* Buffer for compressed texture */ |
| 77 | size_t tex_size; /* Size of the compressed texture */ |
| 78 | |
| 79 | size_t max_snappy; /* Maximum compressed size for snappy buffer */ |
| 80 | |
| 81 | int slice_count; /* Number of slices for threaded operations */ |
| 82 | |
| 83 | /* Pointer to the selected compress or decompress function */ |
| 84 | int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); |
| 85 | } HapContext; |
| 86 | |
| 87 | /* |
| 88 | * Set the number of chunks in the frame. Returns 0 on success or an error if: |
| 89 | * - first_in_frame is 0 and the number of chunks has changed |
| 90 | * - any other error occurs |
| 91 | */ |
| 92 | int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame); |
| 93 | |
| 94 | /* |
| 95 | * Free resources associated with the context |
| 96 | */ |
| 97 | av_cold void ff_hap_free_context(HapContext *ctx); |
| 98 | |
| 99 | #endif /* AVCODEC_HAP_H */ |
| 100 |