1 /* 2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org> 3 * Copyright (C) 2009 David Conrad 4 * Copyright (C) 2011 Jordi Ortiz 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_DIRAC_H 24 #define AVCODEC_DIRAC_H 25 26 /** 27 * @file 28 * Interface to Dirac Decoder/Encoder 29 * @author Marco Gerards <marco@gnu.org> 30 * @author David Conrad 31 * @author Jordi Ortiz 32 */ 33 34 #include "avcodec.h" 35 36 /** 37 * The spec limits the number of wavelet decompositions to 4 for both 38 * level 1 (VC-2) and 128 (long-gop default). 39 * 5 decompositions is the maximum before >16-bit buffers are needed. 40 * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting 41 * the others to 4 decompositions (or 3 for the fidelity filter). 42 * 43 * We use this instead of MAX_DECOMPOSITIONS to save some memory. 44 */ 45 #define MAX_DWT_LEVELS 5 46 47 /** 48 * Parse code values: 49 * 50 * Dirac Specification -> 51 * 9.6.1 Table 9.1 52 * 53 * VC-2 Specification -> 54 * 10.4.1 Table 10.1 55 */ 56 57 enum DiracParseCodes { 58 DIRAC_PCODE_SEQ_HEADER = 0x00, 59 DIRAC_PCODE_END_SEQ = 0x10, 60 DIRAC_PCODE_AUX = 0x20, 61 DIRAC_PCODE_PAD = 0x30, 62 DIRAC_PCODE_PICTURE_CODED = 0x08, 63 DIRAC_PCODE_PICTURE_RAW = 0x48, 64 DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8, 65 DIRAC_PCODE_PICTURE_HQ = 0xE8, 66 DIRAC_PCODE_INTER_NOREF_CO1 = 0x0A, 67 DIRAC_PCODE_INTER_NOREF_CO2 = 0x09, 68 DIRAC_PCODE_INTER_REF_CO1 = 0x0D, 69 DIRAC_PCODE_INTER_REF_CO2 = 0x0E, 70 DIRAC_PCODE_INTRA_REF_CO = 0x0C, 71 DIRAC_PCODE_INTRA_REF_RAW = 0x4C, 72 DIRAC_PCODE_INTRA_REF_PICT = 0xCC, 73 DIRAC_PCODE_MAGIC = 0x42424344, 74 }; 75 76 typedef struct DiracVersionInfo { 77 int major; 78 int minor; 79 } DiracVersionInfo; 80 81 typedef struct AVDiracSeqHeader { 82 unsigned width; 83 unsigned height; 84 uint8_t chroma_format; ///< 0: 444 1: 422 2: 420 85 86 uint8_t interlaced; 87 uint8_t top_field_first; 88 89 uint8_t frame_rate_index; ///< index into dirac_frame_rate[] 90 uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[] 91 92 uint16_t clean_width; 93 uint16_t clean_height; 94 uint16_t clean_left_offset; 95 uint16_t clean_right_offset; 96 97 uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[] 98 uint8_t color_spec_index; ///< index into dirac_color_spec_presets[] 99 100 int profile; 101 int level; 102 103 AVRational framerate; 104 AVRational sample_aspect_ratio; 105 106 enum AVPixelFormat pix_fmt; 107 enum AVColorRange color_range; 108 enum AVColorPrimaries color_primaries; 109 enum AVColorTransferCharacteristic color_trc; 110 enum AVColorSpace colorspace; 111 112 DiracVersionInfo version; 113 int bit_depth; 114 } AVDiracSeqHeader; 115 116 /** 117 * Parse a Dirac sequence header. 118 * 119 * @param dsh this function will allocate and fill an AVDiracSeqHeader struct 120 * and write it into this pointer. The caller must free it with 121 * av_free(). 122 * @param buf the data buffer 123 * @param buf_size the size of the data buffer in bytes 124 * @param log_ctx if non-NULL, this function will log errors here 125 * @return 0 on success, a negative AVERROR code on failure 126 */ 127 int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh, 128 const uint8_t *buf, size_t buf_size, 129 void *log_ctx); 130 131 #endif /* AVCODEC_DIRAC_H */ 132