3 * Copyright (c) 2000 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/mathematics.h"
23 #include "libavcodec/avcodec.h"
25 #include "avio_internal.h"
27 #include "libavcodec/bytestream.h"
28 #include "libavutil/avassert.h"
30 /* Note: when encoding, the first matching tag is used, so order is
31 important if multiple tags possible for a given codec.
32 Note also that this list is used for more than just riff, other
35 const AVCodecTag ff_codec_bmp_tags[] = {
36 { AV_CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
37 { AV_CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
38 { AV_CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
39 { AV_CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
40 { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
41 { AV_CODEC_ID_H264, MKTAG('D', 'A', 'V', 'C') },
42 { AV_CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
43 { AV_CODEC_ID_H264, MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */
44 { AV_CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
45 { AV_CODEC_ID_H263, MKTAG('X', '2', '6', '3') },
46 { AV_CODEC_ID_H263, MKTAG('T', '2', '6', '3') },
47 { AV_CODEC_ID_H263, MKTAG('L', '2', '6', '3') },
48 { AV_CODEC_ID_H263, MKTAG('V', 'X', '1', 'K') },
49 { AV_CODEC_ID_H263, MKTAG('Z', 'y', 'G', 'o') },
50 { AV_CODEC_ID_H263, MKTAG('M', '2', '6', '3') },
51 { AV_CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
52 { AV_CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
53 { AV_CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
54 { AV_CODEC_ID_H263, MKTAG('U', '2', '6', '3') },
55 { AV_CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
56 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
57 { AV_CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
58 { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
59 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
60 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
61 { AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 0 ) }, /* some broken avi use this */
62 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
63 { AV_CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
64 { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
65 { AV_CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
66 { AV_CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
67 { AV_CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
68 { AV_CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
69 { AV_CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') },
70 { AV_CODEC_ID_MPEG4, MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
71 { AV_CODEC_ID_MPEG4, MKTAG('F', 'F', 'D', 'S') },
72 { AV_CODEC_ID_MPEG4, MKTAG('F', 'V', 'F', 'W') },
73 { AV_CODEC_ID_MPEG4, MKTAG('D', 'C', 'O', 'D') },
74 { AV_CODEC_ID_MPEG4, MKTAG('M', 'V', 'X', 'M') },
75 { AV_CODEC_ID_MPEG4, MKTAG('P', 'M', '4', 'V') },
76 { AV_CODEC_ID_MPEG4, MKTAG('S', 'M', 'P', '4') },
77 { AV_CODEC_ID_MPEG4, MKTAG('D', 'X', 'G', 'M') },
78 { AV_CODEC_ID_MPEG4, MKTAG('V', 'I', 'D', 'M') },
79 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'T', '3') },
80 { AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'X') },
81 { AV_CODEC_ID_MPEG4, MKTAG('H', 'D', 'X', '4') }, /* flipped video */
82 { AV_CODEC_ID_MPEG4, MKTAG('D', 'M', 'K', '2') },
83 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'G', 'I') },
84 { AV_CODEC_ID_MPEG4, MKTAG('I', 'N', 'M', 'C') },
85 { AV_CODEC_ID_MPEG4, MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
86 { AV_CODEC_ID_MPEG4, MKTAG('E', 'M', '4', 'A') },
87 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
88 { AV_CODEC_ID_MPEG4, MKTAG('S', 'N', '4', '0') },
89 { AV_CODEC_ID_MPEG4, MKTAG('V', 'S', 'P', 'X') },
90 { AV_CODEC_ID_MPEG4, MKTAG('U', 'L', 'D', 'X') },
91 { AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'V') },
92 { AV_CODEC_ID_MPEG4, MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
93 { AV_CODEC_ID_MPEG4, MKTAG('S', 'M', '4', 'V') },
94 { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'X') },
95 { AV_CODEC_ID_MPEG4, MKTAG('D', 'r', 'e', 'X') },
96 { AV_CODEC_ID_MPEG4, MKTAG('Q', 'M', 'P', '4') }, /* QNAP Systems */
97 { AV_CODEC_ID_MPEG4, MKTAG('P', 'L', 'V', '1') }, /* Pelco DVR MPEG-4 */
98 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
99 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') },
100 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
101 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
102 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
103 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
104 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'V', 'X', '3') },
105 { AV_CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
106 { AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
107 { AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
108 { AV_CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
109 { AV_CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
110 { AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
111 { AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', '4', '1') },
112 { AV_CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
113 { AV_CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
114 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
115 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
116 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
117 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
118 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
119 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', '0') },
120 { AV_CODEC_ID_DVVIDEO, MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
121 { AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
122 { AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', '5') }, /* Canopus DV */
123 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') },
124 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 's') },
125 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
126 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'i', 's') },
127 { AV_CODEC_ID_DVVIDEO, MKTAG('p', 'd', 'v', 'c') },
128 { AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', '2', '5') },
129 { AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', 'D', 'V') },
130 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
131 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
132 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
133 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
134 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
135 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('P', 'I', 'M', '2') },
136 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
137 { AV_CODEC_ID_MPEG1VIDEO, MKTAG( 1 , 0 , 0 , 16) },
138 { AV_CODEC_ID_MPEG2VIDEO, MKTAG( 2 , 0 , 0 , 16) },
139 { AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 16) },
140 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
141 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
142 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
143 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('s', 'l', 'i', 'f') },
144 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('E', 'M', '2', 'V') },
145 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
146 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', 'v') },
147 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('B', 'W', '1', '0') },
148 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('X', 'M', 'P', 'G') }, /* Xing MPEG intra only */
149 { AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
150 { AV_CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
151 { AV_CODEC_ID_MJPEG, MKTAG('d', 'm', 'b', '1') },
152 { AV_CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') },
153 { AV_CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
154 { AV_CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
155 { AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
156 { AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'P', 'G') },
157 { AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
158 { AV_CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
159 { AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
160 { AV_CODEC_ID_AVRN, MKTAG('A', 'V', 'R', 'n') },
161 { AV_CODEC_ID_MJPEG, MKTAG('A', 'C', 'D', 'V') },
162 { AV_CODEC_ID_MJPEG, MKTAG('Q', 'I', 'V', 'G') },
163 { AV_CODEC_ID_MJPEG, MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
164 { AV_CODEC_ID_MJPEG, MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
165 { AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
166 { AV_CODEC_ID_MJPEG, MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
167 { AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '1') },
168 { AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '2') },
169 { AV_CODEC_ID_MJPEG, MKTAG('M', 'T', 'S', 'J') },
170 { AV_CODEC_ID_MJPEG, MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
171 { AV_CODEC_ID_MJPEG, MKTAG('M', 'M', 'J', 'P') },
172 { AV_CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
173 { AV_CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
174 { AV_CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
175 { AV_CODEC_ID_RAWVIDEO, MKTAG( 0 , 0 , 0 , 0 ) },
176 { AV_CODEC_ID_RAWVIDEO, MKTAG( 3 , 0 , 0 , 0 ) },
177 { AV_CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
178 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
179 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
180 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', '4', '2', '2') },
181 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'N', 'V') },
182 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'V') },
183 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'Y') },
184 { AV_CODEC_ID_RAWVIDEO, MKTAG('u', 'y', 'v', '1') },
185 { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'V', 'u', '1') },
186 { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') },
187 { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') },
188 { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') },
189 { AV_CODEC_ID_RAWVIDEO, MKTAG('P', '4', '2', '2') },
190 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
191 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '6') },
192 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '2', '4') },
193 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
194 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'Y', 'U', 'Y') },
195 { AV_CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
196 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
197 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', ' ', ' ') },
198 { AV_CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
199 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
200 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
201 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', '1') },
202 { AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '1', '2') },
203 { AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '2', '1') },
204 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', 'B') },
205 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', 'B') },
206 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'V', '9') },
207 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
208 { AV_CODEC_ID_RAWVIDEO, MKTAG('a', 'u', 'v', '2') },
209 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'Y', 'U') },
210 { AV_CODEC_ID_FRWU, MKTAG('F', 'R', 'W', 'U') },
211 { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'k') },
212 { AV_CODEC_ID_R210, MKTAG('r', '2', '1', '0') },
213 { AV_CODEC_ID_V210, MKTAG('v', '2', '1', '0') },
214 { AV_CODEC_ID_V308, MKTAG('v', '3', '0', '8') },
215 { AV_CODEC_ID_V408, MKTAG('v', '4', '0', '8') },
216 { AV_CODEC_ID_AYUV, MKTAG('A', 'Y', 'U', 'V') },
217 { AV_CODEC_ID_V410, MKTAG('v', '4', '1', '0') },
218 { AV_CODEC_ID_YUV4, MKTAG('y', 'u', 'v', '4') },
219 { AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
220 { AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
221 { AV_CODEC_ID_INDEO4, MKTAG('I', 'V', '4', '1') },
222 { AV_CODEC_ID_INDEO5, MKTAG('I', 'V', '5', '0') },
223 { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
224 { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
225 { AV_CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
226 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
227 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
228 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
229 { AV_CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
230 { AV_CODEC_ID_VP6F, MKTAG('F', 'L', 'V', '4') },
231 { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
232 { AV_CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
233 { AV_CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
234 { AV_CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
235 { AV_CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
236 { AV_CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
237 { AV_CODEC_ID_MIMIC, MKTAG('L', 'M', '2', '0') },
238 { AV_CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
239 { AV_CODEC_ID_MSRLE, MKTAG( 1 , 0 , 0 , 0 ) },
240 { AV_CODEC_ID_MSRLE, MKTAG( 2 , 0 , 0 , 0 ) },
241 { AV_CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
242 { AV_CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
243 { AV_CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
244 { AV_CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
245 { AV_CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
246 { AV_CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
247 { AV_CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
248 { AV_CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
249 { AV_CODEC_ID_TRUEMOTION1, MKTAG('P', 'V', 'E', 'Z') },
250 { AV_CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
251 { AV_CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
252 { AV_CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
253 { AV_CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
254 { AV_CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
255 { AV_CODEC_ID_FLV1, MKTAG('S', '2', '6', '3') },
256 { AV_CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
257 { AV_CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
258 { AV_CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
259 { AV_CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
260 { AV_CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
261 { AV_CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
262 { AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
263 { AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
264 { AV_CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
265 { AV_CODEC_ID_WMV3IMAGE, MKTAG('W', 'M', 'V', 'P') },
266 { AV_CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
267 { AV_CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
268 { AV_CODEC_ID_VC1IMAGE, MKTAG('W', 'V', 'P', '2') },
269 { AV_CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
270 { AV_CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
271 { AV_CODEC_ID_WNV1, MKTAG('Y', 'U', 'V', '8') },
272 { AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', '4') },
273 { AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
274 { AV_CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
275 { AV_CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
276 { AV_CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
277 { AV_CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
278 { AV_CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
279 { AV_CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
280 { AV_CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
281 { AV_CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
282 { AV_CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') },
283 { AV_CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
284 { AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'C') },
285 { AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'K') },
286 { AV_CODEC_ID_JPEG2000, MKTAG('I', 'P', 'J', '2') },
287 { AV_CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
288 { AV_CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
289 { AV_CODEC_ID_PNG, MKTAG('M', 'P', 'N', 'G') },
290 { AV_CODEC_ID_PNG, MKTAG('P', 'N', 'G', '1') },
291 { AV_CODEC_ID_CLJR, MKTAG('C', 'L', 'J', 'R') },
292 { AV_CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
293 { AV_CODEC_ID_RPZA, MKTAG('a', 'z', 'p', 'r') },
294 { AV_CODEC_ID_RPZA, MKTAG('R', 'P', 'Z', 'A') },
295 { AV_CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') },
296 { AV_CODEC_ID_SP5X, MKTAG('S', 'P', '5', '4') },
297 { AV_CODEC_ID_AURA, MKTAG('A', 'U', 'R', 'A') },
298 { AV_CODEC_ID_AURA2, MKTAG('A', 'U', 'R', '2') },
299 { AV_CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') },
300 { AV_CODEC_ID_KGV1, MKTAG('K', 'G', 'V', '1') },
301 { AV_CODEC_ID_LAGARITH, MKTAG('L', 'A', 'G', 'S') },
302 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '2') },
303 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '3') },
304 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '4') },
305 { AV_CODEC_ID_AMV, MKTAG('A', 'M', 'V', 'F') },
306 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'A') },
307 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'G') },
308 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '0') },
309 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '2') },
310 { AV_CODEC_ID_VBLE, MKTAG('V', 'B', 'L', 'E') },
311 { AV_CODEC_ID_ESCAPE130, MKTAG('E', '1', '3', '0') },
312 { AV_CODEC_ID_DXTORY, MKTAG('x', 't', 'o', 'r') },
313 { AV_CODEC_ID_ZEROCODEC, MKTAG('Z', 'E', 'C', 'O') },
314 { AV_CODEC_ID_Y41P, MKTAG('Y', '4', '1', 'P') },
315 { AV_CODEC_ID_FLIC, MKTAG('A', 'F', 'L', 'C') },
316 { AV_CODEC_ID_EXR, MKTAG('e', 'x', 'r', ' ') },
317 { AV_CODEC_ID_MSS1, MKTAG('M', 'S', 'S', '1') },
318 { AV_CODEC_ID_MSA1, MKTAG('M', 'S', 'A', '1') },
319 { AV_CODEC_ID_TSCC2, MKTAG('T', 'S', 'C', '2') },
320 { AV_CODEC_ID_MTS2, MKTAG('M', 'T', 'S', '2') },
321 { AV_CODEC_ID_CLLC, MKTAG('C', 'L', 'L', 'C') },
322 { AV_CODEC_ID_MSS2, MKTAG('M', 'S', 'S', '2') },
323 { AV_CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') },
324 { AV_CODEC_ID_NONE, 0 }
327 const AVCodecTag ff_codec_wav_tags[] = {
328 { AV_CODEC_ID_PCM_S16LE, 0x0001 },
329 { AV_CODEC_ID_PCM_U8, 0x0001 }, /* must come after s16le in this list */
330 { AV_CODEC_ID_PCM_S24LE, 0x0001 },
331 { AV_CODEC_ID_PCM_S32LE, 0x0001 },
332 { AV_CODEC_ID_ADPCM_MS, 0x0002 },
333 { AV_CODEC_ID_PCM_F32LE, 0x0003 },
334 { AV_CODEC_ID_PCM_F64LE, 0x0003 }, /* must come after f32le in this list */
335 { AV_CODEC_ID_PCM_ALAW, 0x0006 },
336 { AV_CODEC_ID_PCM_MULAW, 0x0007 },
337 { AV_CODEC_ID_WMAVOICE, 0x000A },
338 { AV_CODEC_ID_ADPCM_IMA_WAV, 0x0011 },
339 { AV_CODEC_ID_PCM_ZORK, 0x0011 }, /* must come after adpcm_ima_wav in this list */
340 { AV_CODEC_ID_ADPCM_YAMAHA, 0x0020 },
341 { AV_CODEC_ID_TRUESPEECH, 0x0022 },
342 { AV_CODEC_ID_GSM_MS, 0x0031 },
343 { AV_CODEC_ID_AMR_NB, 0x0038 }, /* rogue format number */
344 { AV_CODEC_ID_G723_1, 0x0042 },
345 { AV_CODEC_ID_ADPCM_G726, 0x0045 },
346 { AV_CODEC_ID_MP2, 0x0050 },
347 { AV_CODEC_ID_MP3, 0x0055 },
348 { AV_CODEC_ID_AMR_NB, 0x0057 },
349 { AV_CODEC_ID_AMR_WB, 0x0058 },
350 { AV_CODEC_ID_ADPCM_IMA_DK4, 0x0061 }, /* rogue format number */
351 { AV_CODEC_ID_ADPCM_IMA_DK3, 0x0062 }, /* rogue format number */
352 { AV_CODEC_ID_ADPCM_IMA_WAV, 0x0069 },
353 { AV_CODEC_ID_VOXWARE, 0x0075 },
354 { AV_CODEC_ID_AAC, 0x00ff },
355 { AV_CODEC_ID_SIPR, 0x0130 },
356 { AV_CODEC_ID_WMAV1, 0x0160 },
357 { AV_CODEC_ID_WMAV2, 0x0161 },
358 { AV_CODEC_ID_WMAPRO, 0x0162 },
359 { AV_CODEC_ID_WMALOSSLESS, 0x0163 },
360 { AV_CODEC_ID_ADPCM_CT, 0x0200 },
361 { AV_CODEC_ID_ATRAC3, 0x0270 },
362 { AV_CODEC_ID_ADPCM_G722, 0x028F },
363 { AV_CODEC_ID_IMC, 0x0401 },
364 { AV_CODEC_ID_IAC, 0x0402 },
365 { AV_CODEC_ID_GSM_MS, 0x1500 },
366 { AV_CODEC_ID_TRUESPEECH, 0x1501 },
367 { AV_CODEC_ID_AAC, 0x1600 }, /* ADTS AAC */
368 { AV_CODEC_ID_AAC_LATM, 0x1602 },
369 { AV_CODEC_ID_AC3, 0x2000 },
370 { AV_CODEC_ID_DTS, 0x2001 },
371 { AV_CODEC_ID_SONIC, 0x2048 },
372 { AV_CODEC_ID_SONIC_LS, 0x2048 },
373 { AV_CODEC_ID_PCM_MULAW, 0x6c75 },
374 { AV_CODEC_ID_AAC, 0x706d },
375 { AV_CODEC_ID_AAC, 0x4143 },
376 { AV_CODEC_ID_SPEEX, 0xA109 },
377 { AV_CODEC_ID_FLAC, 0xF1AC },
378 { AV_CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
379 { AV_CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
381 /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
382 // for NuppelVideo (nuv.c)
383 { AV_CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
384 { AV_CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
385 { AV_CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
386 { AV_CODEC_ID_NONE, 0 },
389 const AVCodecGuid ff_codec_wav_guids[] = {
390 {AV_CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
391 {AV_CODEC_ID_ATRAC3P, {0xBF,0xAA,0x23,0xE9,0x58,0xCB,0x71,0x44,0xA1,0x19,0xFF,0xFA,0x01,0xE4,0xCE,0x62}},
392 {AV_CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
393 {AV_CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
397 const AVMetadataConv ff_riff_info_conv[] = {
398 { "IART", "artist" },
399 { "ICMT", "comment" },
400 { "ICOP", "copyright" },
403 { "ILNG", "language" },
407 { "ISFT", "encoder" },
408 { "ISMP", "timecode" },
409 { "ITCH", "encoded_by"},
413 const char ff_riff_tags[][5] = {
414 "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
415 "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
416 "IPRT", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
421 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
423 ffio_wfourcc(pb, tag);
425 return avio_tell(pb);
428 void ff_end_tag(AVIOContext *pb, int64_t start)
433 avio_seek(pb, start - 4, SEEK_SET);
434 avio_wl32(pb, (uint32_t)(pos - start));
435 avio_seek(pb, pos, SEEK_SET);
438 /* WAVEFORMATEX header */
439 /* returns the size or -1 on error */
440 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
442 int bps, blkalign, bytespersec, frame_size;
444 int waveformatextensible;
446 uint8_t *riff_extradata= temp;
447 uint8_t *riff_extradata_start= temp;
449 if(!enc->codec_tag || enc->codec_tag > 0xffff)
452 /* We use the known constant frame size for the codec if known, otherwise
453 fallback to using AVCodecContext.frame_size, which is not as reliable
454 for indicating packet duration */
455 frame_size = av_get_audio_frame_duration(enc, 0);
457 frame_size = enc->frame_size;
459 waveformatextensible = (enc->channels > 2 && enc->channel_layout)
460 || enc->sample_rate > 48000
461 || av_get_bits_per_sample(enc->codec_id) > 16;
463 if (waveformatextensible) {
464 avio_wl16(pb, 0xfffe);
466 avio_wl16(pb, enc->codec_tag);
468 avio_wl16(pb, enc->channels);
469 avio_wl32(pb, enc->sample_rate);
470 if (enc->codec_id == CODEC_ID_ATRAC3 ||
471 enc->codec_id == CODEC_ID_G723_1 ||
472 enc->codec_id == CODEC_ID_GSM_MS ||
473 enc->codec_id == CODEC_ID_MP2 ||
474 enc->codec_id == CODEC_ID_MP3) {
477 if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
478 if (enc->bits_per_coded_sample)
479 bps = enc->bits_per_coded_sample;
481 bps = 16; // default to 16
484 if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
485 av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
488 if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3) {
489 /* this is wrong, but it seems many demuxers do not work if this is set
491 blkalign = frame_size;
492 //blkalign = 144 * enc->bit_rate/enc->sample_rate;
493 } else if (enc->codec_id == AV_CODEC_ID_AC3) {
494 blkalign = 3840; //maximum bytes per frame
495 } else if (enc->codec_id == AV_CODEC_ID_AAC) {
496 blkalign = 768 * enc->channels; //maximum bytes per frame
497 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
499 } else if (enc->block_align != 0) { /* specified by the codec */
500 blkalign = enc->block_align;
502 blkalign = bps * enc->channels / av_gcd(8, bps);
503 if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
504 enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
505 enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
506 enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
507 enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
508 enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
509 bytespersec = enc->sample_rate * blkalign;
510 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
513 bytespersec = enc->bit_rate / 8;
515 avio_wl32(pb, bytespersec); /* bytes per second */
516 avio_wl16(pb, blkalign); /* block align */
517 avio_wl16(pb, bps); /* bits per sample */
518 if (enc->codec_id == AV_CODEC_ID_MP3) {
520 bytestream_put_le16(&riff_extradata, 1); /* wID */
521 bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
522 bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
523 bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
524 bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
525 } else if (enc->codec_id == AV_CODEC_ID_MP2) {
527 bytestream_put_le16(&riff_extradata, 2); /* fwHeadLayer */
528 bytestream_put_le32(&riff_extradata, enc->bit_rate); /* dwHeadBitrate */
529 bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
530 bytestream_put_le16(&riff_extradata, 0); /* fwHeadModeExt */
531 bytestream_put_le16(&riff_extradata, 1); /* wHeadEmphasis */
532 bytestream_put_le16(&riff_extradata, 16); /* fwHeadFlags */
533 bytestream_put_le32(&riff_extradata, 0); /* dwPTSLow */
534 bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */
535 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
537 bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
538 bytestream_put_le32(&riff_extradata, 0xaea2f732);
539 bytestream_put_le16(&riff_extradata, 0xacde);
540 } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
542 bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */
543 } else if(enc->extradata_size){
544 riff_extradata_start= enc->extradata;
545 riff_extradata= enc->extradata + enc->extradata_size;
546 hdrsize += enc->extradata_size;
548 if(waveformatextensible) { /* write WAVEFORMATEXTENSIBLE extensions */
550 avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
551 avio_wl16(pb, bps); /* ValidBitsPerSample || SamplesPerBlock || Reserved */
552 avio_wl32(pb, enc->channel_layout); /* dwChannelMask */
553 avio_wl32(pb, enc->codec_tag); /* GUID + next 3 */
554 avio_wl32(pb, 0x00100000);
555 avio_wl32(pb, 0xAA000080);
556 avio_wl32(pb, 0x719B3800);
558 avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
560 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
569 /* BITMAPINFOHEADER header */
570 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
572 avio_wl32(pb, 40 + enc->extradata_size); /* size */
573 avio_wl32(pb, enc->width);
574 //We always store RGB TopDown
575 avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
576 avio_wl16(pb, 1); /* planes */
578 avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
579 /* compression type */
580 avio_wl32(pb, enc->codec_tag);
581 avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);
587 avio_write(pb, enc->extradata, enc->extradata_size);
589 if (!for_asf && enc->extradata_size & 1)
592 #endif //CONFIG_MUXERS
595 /* We could be given one of the three possible structures here:
596 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
597 * is an expansion of the previous one with the fields added
598 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
599 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
600 * an openended structure.
602 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
607 codec->codec_type = AVMEDIA_TYPE_AUDIO;
608 codec->channels = avio_rl16(pb);
609 codec->sample_rate = avio_rl32(pb);
610 codec->bit_rate = avio_rl32(pb) * 8;
611 codec->block_align = avio_rl16(pb);
612 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
613 codec->bits_per_coded_sample = 8;
615 codec->bits_per_coded_sample = avio_rl16(pb);
617 codec->codec_tag = 0;
619 codec->codec_tag = id;
620 codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
622 if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
623 int cbSize = avio_rl16(pb); /* cbSize */
625 cbSize = FFMIN(size, cbSize);
626 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
627 ff_asf_guid subformat;
628 int bps = avio_rl16(pb);
630 codec->bits_per_coded_sample = bps;
631 codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
632 ff_get_guid(pb, &subformat);
633 if (!memcmp(subformat + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
634 codec->codec_tag = AV_RL32(subformat);
635 codec->codec_id = ff_wav_codec_get_id(codec->codec_tag, codec->bits_per_coded_sample);
637 codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
638 if (!codec->codec_id)
639 av_log(codec, AV_LOG_WARNING, "unknown subformat:"FF_PRI_GUID"\n", FF_ARG_GUID(subformat));
644 codec->extradata_size = cbSize;
646 av_free(codec->extradata);
647 codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
648 if (!codec->extradata)
649 return AVERROR(ENOMEM);
650 avio_read(pb, codec->extradata, codec->extradata_size);
654 /* It is possible for the chunk to contain garbage at the end */
658 if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
659 /* channels and sample_rate values are those prior to applying SBR and/or PS */
661 codec->sample_rate = 0;
663 /* override bits_per_coded_sample for G.726 */
664 if (codec->codec_id == AV_CODEC_ID_ADPCM_G726)
665 codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
671 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
674 id = ff_codec_get_id(ff_codec_wav_tags, tag);
677 /* handle specific u8 codec */
678 if (id == AV_CODEC_ID_PCM_S16LE && bps == 8)
679 id = AV_CODEC_ID_PCM_U8;
680 if (id == AV_CODEC_ID_PCM_S16LE && bps == 24)
681 id = AV_CODEC_ID_PCM_S24LE;
682 if (id == AV_CODEC_ID_PCM_S16LE && bps == 32)
683 id = AV_CODEC_ID_PCM_S32LE;
684 if (id == AV_CODEC_ID_PCM_F32LE && bps == 64)
685 id = AV_CODEC_ID_PCM_F64LE;
686 if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
687 id = AV_CODEC_ID_PCM_ZORK;
691 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
694 if(esize) *esize = avio_rl32(pb);
696 st->codec->width = avio_rl32(pb);
697 st->codec->height = (int32_t)avio_rl32(pb);
698 avio_rl16(pb); /* planes */
699 st->codec->bits_per_coded_sample= avio_rl16(pb); /* depth */
700 tag1 = avio_rl32(pb);
701 avio_rl32(pb); /* ImageSize */
702 avio_rl32(pb); /* XPelsPerMeter */
703 avio_rl32(pb); /* YPelsPerMeter */
704 avio_rl32(pb); /* ClrUsed */
705 avio_rl32(pb); /* ClrImportant */
708 #endif // CONFIG_DEMUXERS
710 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
713 int audio_frame_size;
715 /* We use the known constant frame size for the codec if known, otherwise
716 fallback to using AVCodecContext.frame_size, which is not as reliable
717 for indicating packet duration */
718 audio_frame_size = av_get_audio_frame_duration(stream, 0);
719 if (!audio_frame_size)
720 audio_frame_size = stream->frame_size;
722 *au_ssize= stream->block_align;
723 if (audio_frame_size && stream->sample_rate) {
724 *au_scale = audio_frame_size;
725 *au_rate= stream->sample_rate;
726 }else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
727 stream->codec_type == AVMEDIA_TYPE_DATA ||
728 stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
729 *au_scale= stream->time_base.num;
730 *au_rate = stream->time_base.den;
732 *au_scale= stream->block_align ? stream->block_align*8 : 8;
733 *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
735 gcd= av_gcd(*au_scale, *au_rate);
740 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
742 av_assert0(sizeof(*g) == 16); //compiler will optimize this out
743 if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
744 memset(*g, 0, sizeof(*g));
747 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
750 for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++) {
751 if (!ff_guidcmp(guids[i].guid, guid))
754 return AV_CODEC_ID_NONE;
757 int ff_read_riff_info(AVFormatContext *s, int64_t size)
759 int64_t start, end, cur;
760 AVIOContext *pb = s->pb;
762 start = avio_tell(pb);
765 while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
771 chunk_code = avio_rl32(pb);
772 chunk_size = avio_rl32(pb);
773 if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
774 av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
775 return AVERROR_INVALIDDATA;
778 chunk_size += (chunk_size & 1);
780 value = av_malloc(chunk_size + 1);
782 av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
783 return AVERROR(ENOMEM);
786 AV_WL32(key, chunk_code);
788 if (avio_read(pb, value, chunk_size) != chunk_size) {
790 av_log(s, AV_LOG_ERROR, "premature end of file while reading INFO tag\n");
791 return AVERROR_INVALIDDATA;
794 value[chunk_size] = 0;
796 av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);