Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #ifndef __PJMEDIA_AVI_H__ |
| 20 | #define __PJMEDIA_AVI_H__ |
| 21 | |
| 22 | |
| 23 | /** |
| 24 | * @file avi.h |
| 25 | * @brief AVI file manipulation. |
| 26 | */ |
| 27 | |
| 28 | /** |
| 29 | * @defgroup PJMEDIA_FILE_FORMAT File Formats |
| 30 | * @brief Supported file formats |
| 31 | */ |
| 32 | |
| 33 | |
| 34 | /** |
| 35 | * @defgroup PJMEDIA_AVI AVI Header |
| 36 | * @ingroup PJMEDIA_FILE_FORMAT |
| 37 | * @brief Representation of RIFF/AVI file format |
| 38 | * @{ |
| 39 | * |
| 40 | * This the the low level representation of RIFF/AVI file format. For |
| 41 | * higher abstraction, please see \ref PJMEDIA_FILE_PLAY and |
| 42 | * \ref PJMEDIA_FILE_REC. |
| 43 | */ |
| 44 | |
| 45 | |
| 46 | PJ_BEGIN_DECL |
| 47 | |
| 48 | #define PJMEDIA_AVI_MAX_NUM_STREAMS 4 |
| 49 | |
| 50 | static const char avi_tags[][4] = { |
| 51 | { 'R', 'I', 'F', 'F' }, { 'A', 'V', 'I', ' ' }, |
| 52 | { 'h', 'd', 'r', 'l' }, { 'a', 'v', 'i', 'h' }, |
| 53 | { 's', 't', 'r', 'l' }, { 's', 't', 'r', 'h' }, |
| 54 | { 'a', 'u', 'd', 's' }, { 'v', 'i', 'd', 's' }, |
| 55 | { 's', 't', 'r', 'f' }, { 'm', 'o', 'v', 'i' }, |
| 56 | { 'L', 'I', 'S', 'T' }, { 'J', 'U', 'N', 'K' }, |
| 57 | }; |
| 58 | |
| 59 | typedef enum { |
| 60 | PJMEDIA_AVI_RIFF_TAG = 0, |
| 61 | PJMEDIA_AVI_AVI_TAG, |
| 62 | PJMEDIA_AVI_HDRL_TAG, |
| 63 | PJMEDIA_AVI_AVIH_TAG, |
| 64 | PJMEDIA_AVI_STRL_TAG, |
| 65 | PJMEDIA_AVI_STRH_TAG, |
| 66 | PJMEDIA_AVI_AUDS_TAG, |
| 67 | PJMEDIA_AVI_VIDS_TAG, |
| 68 | PJMEDIA_AVI_STRF_TAG, |
| 69 | PJMEDIA_AVI_MOVI_TAG, |
| 70 | PJMEDIA_AVI_LIST_TAG, |
| 71 | PJMEDIA_AVI_JUNK_TAG, |
| 72 | } pjmedia_avi_tag; |
| 73 | |
| 74 | |
| 75 | /** |
| 76 | * These types describe the simpler/canonical version of an AVI file. |
| 77 | * They do not support the full AVI RIFF format specification. |
| 78 | */ |
| 79 | #pragma pack(2) |
| 80 | |
| 81 | /** This structure describes RIFF AVI file header */ |
| 82 | typedef struct riff_hdr_t { |
| 83 | pj_uint32_t riff; /**< "RIFF" ASCII tag. */ |
| 84 | pj_uint32_t file_len; /**< File length minus 8 bytes */ |
| 85 | pj_uint32_t avi; /**< "AVI" ASCII tag. */ |
| 86 | } riff_hdr_t; |
| 87 | |
| 88 | /** This structure describes avih header */ |
| 89 | typedef struct avih_hdr_t { |
| 90 | pj_uint32_t list_tag; |
| 91 | pj_uint32_t list_sz; |
| 92 | pj_uint32_t hdrl_tag; |
| 93 | pj_uint32_t avih; |
| 94 | pj_uint32_t size; |
| 95 | pj_uint32_t usec_per_frame; /**< microsecs between frames */ |
| 96 | pj_uint32_t max_Bps; |
| 97 | pj_uint32_t pad; |
| 98 | pj_uint32_t flags; |
| 99 | pj_uint32_t tot_frames; |
| 100 | pj_uint32_t init_frames; |
| 101 | pj_uint32_t num_streams; |
| 102 | pj_uint32_t buf_size; |
| 103 | pj_uint32_t width; |
| 104 | pj_uint32_t height; |
| 105 | pj_uint32_t reserved[4]; |
| 106 | } avih_hdr_t; |
| 107 | |
| 108 | /** This structure describes strl header */ |
| 109 | typedef struct strl_hdr_t { |
| 110 | pj_uint32_t list_tag; |
| 111 | pj_uint32_t list_sz; |
| 112 | pj_uint32_t strl_tag; |
| 113 | |
| 114 | pj_uint32_t strh; |
| 115 | pj_uint32_t strh_size; |
| 116 | pj_uint32_t data_type; |
| 117 | pj_uint32_t codec; |
| 118 | pj_uint32_t flags; |
| 119 | pj_uint32_t bogus_priority_language; /**< Do not access this data */ |
| 120 | pj_uint32_t init_frames; |
| 121 | pj_uint32_t scale; |
| 122 | pj_uint32_t rate; |
| 123 | pj_uint32_t start; |
| 124 | pj_uint32_t length; |
| 125 | pj_uint32_t buf_size; |
| 126 | pj_uint32_t quality; |
| 127 | pj_uint32_t sample_size; |
| 128 | pj_uint32_t bogus_frame[2]; /**< Do not access this data */ |
| 129 | } strl_hdr_t; |
| 130 | |
| 131 | typedef struct { |
| 132 | pj_uint32_t strf; |
| 133 | pj_uint32_t strf_size; |
| 134 | pj_uint16_t fmt_tag; /**< 1 for PCM */ |
| 135 | pj_uint16_t nchannels; /**< Number of channels. */ |
| 136 | pj_uint32_t sample_rate; /**< Sampling rate. */ |
| 137 | pj_uint32_t bytes_per_sec; /**< Average bytes per second. */ |
| 138 | pj_uint16_t block_align; /**< nchannels * bits / 8 */ |
| 139 | pj_uint16_t bits_per_sample; /**< Bits per sample. */ |
| 140 | pj_uint16_t extra_size; |
| 141 | } strf_audio_hdr_t; |
| 142 | |
| 143 | /** |
| 144 | * Sizes of strf_audio_hdr_t struct, started by the size (in bytes) of |
| 145 | * 32-bits struct members, alternated with the size of 16-bits members. |
| 146 | */ |
| 147 | static const pj_uint8_t strf_audio_hdr_sizes [] = {8, 4, 8, 6}; |
| 148 | |
| 149 | typedef struct { |
| 150 | pj_uint32_t strf; |
| 151 | pj_uint32_t strf_size; |
| 152 | pj_uint32_t biSize; |
| 153 | pj_int32_t biWidth; |
| 154 | pj_int32_t biHeight; |
| 155 | pj_uint16_t biPlanes; |
| 156 | pj_uint16_t biBitCount; |
| 157 | pj_uint32_t biCompression; |
| 158 | pj_uint32_t biSizeImage; |
| 159 | pj_int32_t biXPelsPerMeter; |
| 160 | pj_int32_t biYPelsPerMeter; |
| 161 | pj_uint32_t biClrUsed; |
| 162 | pj_uint32_t biClrImportant; |
| 163 | } strf_video_hdr_t; |
| 164 | |
| 165 | static const pj_uint8_t strf_video_hdr_sizes [] = {20, 4, 24}; |
| 166 | |
| 167 | struct pjmedia_avi_hdr |
| 168 | { |
| 169 | riff_hdr_t riff_hdr; |
| 170 | avih_hdr_t avih_hdr; |
| 171 | strl_hdr_t strl_hdr[PJMEDIA_AVI_MAX_NUM_STREAMS]; |
| 172 | union { |
| 173 | strf_audio_hdr_t strf_audio_hdr; |
| 174 | strf_video_hdr_t strf_video_hdr; |
| 175 | } strf_hdr[PJMEDIA_AVI_MAX_NUM_STREAMS]; |
| 176 | }; |
| 177 | |
| 178 | #pragma pack() |
| 179 | |
| 180 | /** |
| 181 | * @see pjmedia_avi_hdr |
| 182 | */ |
| 183 | typedef struct pjmedia_avi_hdr pjmedia_avi_hdr; |
| 184 | |
| 185 | /** |
| 186 | * This structure describes generic RIFF subchunk header. |
| 187 | */ |
| 188 | typedef struct pjmedia_avi_subchunk |
| 189 | { |
| 190 | pj_uint32_t id; /**< Subchunk ASCII tag. */ |
| 191 | pj_uint32_t len; /**< Length following this field */ |
| 192 | } pjmedia_avi_subchunk; |
| 193 | |
| 194 | |
| 195 | PJ_END_DECL |
| 196 | |
| 197 | /** |
| 198 | * @} |
| 199 | */ |
| 200 | |
| 201 | |
| 202 | #endif /* __PJMEDIA_AVI_H__ */ |