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 const AVCodecTag ff_codec_bmp_tags[] = {
33 { AV_CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
34 { AV_CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
35 { AV_CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
36 { AV_CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
37 { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
38 { AV_CODEC_ID_H264, MKTAG('D', 'A', 'V', 'C') },
39 { AV_CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
40 { AV_CODEC_ID_H264, MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */
41 { AV_CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
42 { AV_CODEC_ID_H263, MKTAG('X', '2', '6', '3') },
43 { AV_CODEC_ID_H263, MKTAG('T', '2', '6', '3') },
44 { AV_CODEC_ID_H263, MKTAG('L', '2', '6', '3') },
45 { AV_CODEC_ID_H263, MKTAG('V', 'X', '1', 'K') },
46 { AV_CODEC_ID_H263, MKTAG('Z', 'y', 'G', 'o') },
47 { AV_CODEC_ID_H263, MKTAG('M', '2', '6', '3') },
48 { AV_CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
49 { AV_CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
50 { AV_CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
51 { AV_CODEC_ID_H263, MKTAG('U', '2', '6', '3') },
52 { AV_CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
53 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
54 { AV_CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
55 { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
56 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
57 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
58 { AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 0 ) }, /* some broken avi use this */
59 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
60 { AV_CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
61 { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
62 { AV_CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
63 { AV_CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
64 { AV_CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
65 { AV_CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
66 { AV_CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') },
67 { AV_CODEC_ID_MPEG4, MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
68 { AV_CODEC_ID_MPEG4, MKTAG('F', 'F', 'D', 'S') },
69 { AV_CODEC_ID_MPEG4, MKTAG('F', 'V', 'F', 'W') },
70 { AV_CODEC_ID_MPEG4, MKTAG('D', 'C', 'O', 'D') },
71 { AV_CODEC_ID_MPEG4, MKTAG('M', 'V', 'X', 'M') },
72 { AV_CODEC_ID_MPEG4, MKTAG('P', 'M', '4', 'V') },
73 { AV_CODEC_ID_MPEG4, MKTAG('S', 'M', 'P', '4') },
74 { AV_CODEC_ID_MPEG4, MKTAG('D', 'X', 'G', 'M') },
75 { AV_CODEC_ID_MPEG4, MKTAG('V', 'I', 'D', 'M') },
76 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'T', '3') },
77 { AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'X') },
78 { AV_CODEC_ID_MPEG4, MKTAG('H', 'D', 'X', '4') }, /* flipped video */
79 { AV_CODEC_ID_MPEG4, MKTAG('D', 'M', 'K', '2') },
80 { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'G', 'I') },
81 { AV_CODEC_ID_MPEG4, MKTAG('I', 'N', 'M', 'C') },
82 { AV_CODEC_ID_MPEG4, MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
83 { AV_CODEC_ID_MPEG4, MKTAG('E', 'M', '4', 'A') },
84 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
85 { AV_CODEC_ID_MPEG4, MKTAG('S', 'N', '4', '0') },
86 { AV_CODEC_ID_MPEG4, MKTAG('V', 'S', 'P', 'X') },
87 { AV_CODEC_ID_MPEG4, MKTAG('U', 'L', 'D', 'X') },
88 { AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'V') },
89 { AV_CODEC_ID_MPEG4, MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
90 { AV_CODEC_ID_MPEG4, MKTAG('S', 'M', '4', 'V') },
91 { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'X') },
92 { AV_CODEC_ID_MPEG4, MKTAG('D', 'r', 'e', 'X') },
93 { AV_CODEC_ID_MPEG4, MKTAG('Q', 'M', 'P', '4') }, /* QNAP Systems */
94 { AV_CODEC_ID_MPEG4, MKTAG('P', 'L', 'V', '1') }, /* Pelco DVR MPEG-4 */
95 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
96 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') },
97 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
98 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
99 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
100 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
101 { AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'V', 'X', '3') },
102 { AV_CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
103 { AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
104 { AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
105 { AV_CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
106 { AV_CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
107 { AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
108 { AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', '4', '1') },
109 { AV_CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
110 { AV_CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
111 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
112 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
113 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
114 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
115 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
116 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', '0') },
117 { AV_CODEC_ID_DVVIDEO, MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
118 { AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
119 { AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', '5') }, /* Canopus DV */
120 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') },
121 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 's') },
122 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
123 { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'i', 's') },
124 { AV_CODEC_ID_DVVIDEO, MKTAG('p', 'd', 'v', 'c') },
125 { AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', '2', '5') },
126 { AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', 'D', 'V') },
127 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
128 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
129 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
130 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
131 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
132 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('P', 'I', 'M', '2') },
133 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
134 { AV_CODEC_ID_MPEG1VIDEO, MKTAG( 1 , 0 , 0 , 16) },
135 { AV_CODEC_ID_MPEG2VIDEO, MKTAG( 2 , 0 , 0 , 16) },
136 { AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 16) },
137 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
138 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
139 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
140 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('s', 'l', 'i', 'f') },
141 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('E', 'M', '2', 'V') },
142 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
143 { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', 'v') },
144 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('B', 'W', '1', '0') },
145 { AV_CODEC_ID_MPEG1VIDEO, MKTAG('X', 'M', 'P', 'G') }, /* Xing MPEG intra only */
146 { AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
147 { AV_CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
148 { AV_CODEC_ID_MJPEG, MKTAG('d', 'm', 'b', '1') },
149 { AV_CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') },
150 { AV_CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
151 { AV_CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
152 { AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
153 { AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'P', 'G') },
154 { AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
155 { AV_CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
156 { AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
157 { AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') },
158 { AV_CODEC_ID_MJPEG, MKTAG('A', 'C', 'D', 'V') },
159 { AV_CODEC_ID_MJPEG, MKTAG('Q', 'I', 'V', 'G') },
160 { AV_CODEC_ID_MJPEG, MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
161 { AV_CODEC_ID_MJPEG, MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
162 { AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
163 { AV_CODEC_ID_MJPEG, MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
164 { AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '1') },
165 { AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '2') },
166 { AV_CODEC_ID_MJPEG, MKTAG('M', 'T', 'S', 'J') },
167 { AV_CODEC_ID_MJPEG, MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
168 { AV_CODEC_ID_MJPEG, MKTAG('M', 'M', 'J', 'P') },
169 { AV_CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
170 { AV_CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
171 { AV_CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
172 { AV_CODEC_ID_RAWVIDEO, MKTAG( 0 , 0 , 0 , 0 ) },
173 { AV_CODEC_ID_RAWVIDEO, MKTAG( 3 , 0 , 0 , 0 ) },
174 { AV_CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
175 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
176 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
177 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', '4', '2', '2') },
178 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'N', 'V') },
179 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'V') },
180 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'Y') },
181 { AV_CODEC_ID_RAWVIDEO, MKTAG('u', 'y', 'v', '1') },
182 { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'V', 'u', '1') },
183 { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') },
184 { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') },
185 { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') },
186 { AV_CODEC_ID_RAWVIDEO, MKTAG('P', '4', '2', '2') },
187 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
188 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '6') },
189 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '2', '4') },
190 { AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
191 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'Y', 'U', 'Y') },
192 { AV_CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
193 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
194 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', ' ', ' ') },
195 { AV_CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
196 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
197 { AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
198 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', '1') },
199 { AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '1', '2') },
200 { AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '2', '1') },
201 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', 'B') },
202 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', 'B') },
203 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'V', '9') },
204 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
205 { AV_CODEC_ID_RAWVIDEO, MKTAG('a', 'u', 'v', '2') },
206 { AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'Y', 'U') },
207 { AV_CODEC_ID_FRWU, MKTAG('F', 'R', 'W', 'U') },
208 { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'k') },
209 { AV_CODEC_ID_R210, MKTAG('r', '2', '1', '0') },
210 { AV_CODEC_ID_V210, MKTAG('v', '2', '1', '0') },
211 { AV_CODEC_ID_V308, MKTAG('v', '3', '0', '8') },
212 { AV_CODEC_ID_V408, MKTAG('v', '4', '0', '8') },
213 { AV_CODEC_ID_AYUV, MKTAG('A', 'Y', 'U', 'V') },
214 { AV_CODEC_ID_V410, MKTAG('v', '4', '1', '0') },
215 { AV_CODEC_ID_YUV4, MKTAG('y', 'u', 'v', '4') },
216 { AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
217 { AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
218 { AV_CODEC_ID_INDEO4, MKTAG('I', 'V', '4', '1') },
219 { AV_CODEC_ID_INDEO5, MKTAG('I', 'V', '5', '0') },
220 { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
221 { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
222 { AV_CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
223 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
224 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
225 { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
226 { AV_CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
227 { AV_CODEC_ID_VP6F, MKTAG('F', 'L', 'V', '4') },
228 { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
229 { AV_CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
230 { AV_CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
231 { AV_CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
232 { AV_CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
233 { AV_CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
234 { AV_CODEC_ID_MIMIC, MKTAG('L', 'M', '2', '0') },
235 { AV_CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
236 { AV_CODEC_ID_MSRLE, MKTAG( 1 , 0 , 0 , 0 ) },
237 { AV_CODEC_ID_MSRLE, MKTAG( 2 , 0 , 0 , 0 ) },
238 { AV_CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
239 { AV_CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
240 { AV_CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
241 { AV_CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
242 { AV_CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
243 { AV_CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
244 { AV_CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
245 { AV_CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
246 { AV_CODEC_ID_TRUEMOTION1, MKTAG('P', 'V', 'E', 'Z') },
247 { AV_CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
248 { AV_CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
249 { AV_CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
250 { AV_CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
251 { AV_CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
252 { AV_CODEC_ID_FLV1, MKTAG('S', '2', '6', '3') },
253 { AV_CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
254 { AV_CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
255 { AV_CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
256 { AV_CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
257 { AV_CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
258 { AV_CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
259 { AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
260 { AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
261 { AV_CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
262 { AV_CODEC_ID_WMV3IMAGE, MKTAG('W', 'M', 'V', 'P') },
263 { AV_CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
264 { AV_CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
265 { AV_CODEC_ID_VC1IMAGE, MKTAG('W', 'V', 'P', '2') },
266 { AV_CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
267 { AV_CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
268 { AV_CODEC_ID_WNV1, MKTAG('Y', 'U', 'V', '8') },
269 { AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', '4') },
270 { AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
271 { AV_CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
272 { AV_CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
273 { AV_CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
274 { AV_CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
275 { AV_CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
276 { AV_CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
277 { AV_CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
278 { AV_CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
279 { AV_CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') },
280 { AV_CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
281 { AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'C') },
282 { AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'K') },
283 { AV_CODEC_ID_JPEG2000, MKTAG('I', 'P', 'J', '2') },
284 { AV_CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
285 { AV_CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
286 { AV_CODEC_ID_PNG, MKTAG('M', 'P', 'N', 'G') },
287 { AV_CODEC_ID_PNG, MKTAG('P', 'N', 'G', '1') },
288 { AV_CODEC_ID_CLJR, MKTAG('C', 'L', 'J', 'R') },
289 { AV_CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
290 { AV_CODEC_ID_RPZA, MKTAG('a', 'z', 'p', 'r') },
291 { AV_CODEC_ID_RPZA, MKTAG('R', 'P', 'Z', 'A') },
292 { AV_CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') },
293 { AV_CODEC_ID_SP5X, MKTAG('S', 'P', '5', '4') },
294 { AV_CODEC_ID_AURA, MKTAG('A', 'U', 'R', 'A') },
295 { AV_CODEC_ID_AURA2, MKTAG('A', 'U', 'R', '2') },
296 { AV_CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') },
297 { AV_CODEC_ID_KGV1, MKTAG('K', 'G', 'V', '1') },
298 { AV_CODEC_ID_LAGARITH, MKTAG('L', 'A', 'G', 'S') },
299 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '2') },
300 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '3') },
301 { AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '4') },
302 { AV_CODEC_ID_AMV, MKTAG('A', 'M', 'V', 'F') },
303 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'A') },
304 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'G') },
305 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '0') },
306 { AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '2') },
307 { AV_CODEC_ID_VBLE, MKTAG('V', 'B', 'L', 'E') },
308 { AV_CODEC_ID_ESCAPE130, MKTAG('E', '1', '3', '0') },
309 { AV_CODEC_ID_DXTORY, MKTAG('x', 't', 'o', 'r') },
310 { AV_CODEC_ID_ZEROCODEC, MKTAG('Z', 'E', 'C', 'O') },
311 { AV_CODEC_ID_Y41P, MKTAG('Y', '4', '1', 'P') },
312 { AV_CODEC_ID_FLIC, MKTAG('A', 'F', 'L', 'C') },
313 { AV_CODEC_ID_EXR, MKTAG('e', 'x', 'r', ' ') },
314 { AV_CODEC_ID_MSS1, MKTAG('M', 'S', 'S', '1') },
315 { AV_CODEC_ID_MSA1, MKTAG('M', 'S', 'A', '1') },
316 { AV_CODEC_ID_TSCC2, MKTAG('T', 'S', 'C', '2') },
317 { AV_CODEC_ID_MTS2, MKTAG('M', 'T', 'S', '2') },
318 { AV_CODEC_ID_CLLC, MKTAG('C', 'L', 'L', 'C') },
319 { AV_CODEC_ID_NONE, 0 }
322 const AVCodecTag ff_codec_wav_tags[] = {
323 { AV_CODEC_ID_PCM_S16LE, 0x0001 },
324 { AV_CODEC_ID_PCM_U8, 0x0001 }, /* must come after s16le in this list */
325 { AV_CODEC_ID_PCM_S24LE, 0x0001 },
326 { AV_CODEC_ID_PCM_S32LE, 0x0001 },
327 { AV_CODEC_ID_ADPCM_MS, 0x0002 },
328 { AV_CODEC_ID_PCM_F32LE, 0x0003 },
329 { AV_CODEC_ID_PCM_F64LE, 0x0003 }, /* must come after f32le in this list */
330 { AV_CODEC_ID_PCM_ALAW, 0x0006 },
331 { AV_CODEC_ID_PCM_MULAW, 0x0007 },
332 { AV_CODEC_ID_WMAVOICE, 0x000A },
333 { AV_CODEC_ID_ADPCM_IMA_WAV, 0x0011 },
334 { AV_CODEC_ID_PCM_ZORK, 0x0011 }, /* must come after adpcm_ima_wav in this list */
335 { AV_CODEC_ID_ADPCM_YAMAHA, 0x0020 },
336 { AV_CODEC_ID_TRUESPEECH, 0x0022 },
337 { AV_CODEC_ID_GSM_MS, 0x0031 },
338 { AV_CODEC_ID_AMR_NB, 0x0038 }, /* rogue format number */
339 { AV_CODEC_ID_G723_1, 0x0042 },
340 { AV_CODEC_ID_ADPCM_G726, 0x0045 },
341 { AV_CODEC_ID_MP2, 0x0050 },
342 { AV_CODEC_ID_MP3, 0x0055 },
343 { AV_CODEC_ID_AMR_NB, 0x0057 },
344 { AV_CODEC_ID_AMR_WB, 0x0058 },
345 { AV_CODEC_ID_ADPCM_IMA_DK4, 0x0061 }, /* rogue format number */
346 { AV_CODEC_ID_ADPCM_IMA_DK3, 0x0062 }, /* rogue format number */
347 { AV_CODEC_ID_ADPCM_IMA_WAV, 0x0069 },
348 { AV_CODEC_ID_VOXWARE, 0x0075 },
349 { AV_CODEC_ID_AAC, 0x00ff },
350 { AV_CODEC_ID_SIPR, 0x0130 },
351 { AV_CODEC_ID_WMAV1, 0x0160 },
352 { AV_CODEC_ID_WMAV2, 0x0161 },
353 { AV_CODEC_ID_WMAPRO, 0x0162 },
354 { AV_CODEC_ID_WMALOSSLESS, 0x0163 },
355 { AV_CODEC_ID_ADPCM_CT, 0x0200 },
356 { AV_CODEC_ID_ATRAC3, 0x0270 },
357 { AV_CODEC_ID_ADPCM_G722, 0x028F },
358 { AV_CODEC_ID_IMC, 0x0401 },
359 { AV_CODEC_ID_IAC, 0x0402 },
360 { AV_CODEC_ID_GSM_MS, 0x1500 },
361 { AV_CODEC_ID_TRUESPEECH, 0x1501 },
362 { AV_CODEC_ID_AAC, 0x1600 }, /* ADTS AAC */
363 { AV_CODEC_ID_AAC_LATM, 0x1602 },
364 { AV_CODEC_ID_AC3, 0x2000 },
365 { AV_CODEC_ID_DTS, 0x2001 },
366 { AV_CODEC_ID_SONIC, 0x2048 },
367 { AV_CODEC_ID_SONIC_LS, 0x2048 },
368 { AV_CODEC_ID_PCM_MULAW, 0x6c75 },
369 { AV_CODEC_ID_AAC, 0x706d },
370 { AV_CODEC_ID_AAC, 0x4143 },
371 { AV_CODEC_ID_SPEEX, 0xA109 },
372 { AV_CODEC_ID_FLAC, 0xF1AC },
373 { AV_CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
374 { AV_CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
376 /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
377 // for NuppelVideo (nuv.c)
378 { AV_CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
379 { AV_CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
380 { AV_CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
381 { AV_CODEC_ID_NONE, 0 },
384 const AVCodecGuid ff_codec_wav_guids[] = {
385 {AV_CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
386 {AV_CODEC_ID_ATRAC3P, {0xBF,0xAA,0x23,0xE9,0x58,0xCB,0x71,0x44,0xA1,0x19,0xFF,0xFA,0x01,0xE4,0xCE,0x62}},
387 {AV_CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
388 {AV_CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
392 const AVMetadataConv ff_riff_info_conv[] = {
393 { "IART", "artist" },
394 { "ICMT", "comment" },
395 { "ICOP", "copyright" },
398 { "ILNG", "language" },
402 { "ISFT", "encoder" },
403 { "ISMP", "timecode" },
404 { "ITCH", "encoded_by"},
408 const char ff_riff_tags[][5] = {
409 "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
410 "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
411 "IPRT", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
416 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
418 ffio_wfourcc(pb, tag);
420 return avio_tell(pb);
423 void ff_end_tag(AVIOContext *pb, int64_t start)
428 avio_seek(pb, start - 4, SEEK_SET);
429 avio_wl32(pb, (uint32_t)(pos - start));
430 avio_seek(pb, pos, SEEK_SET);
433 /* WAVEFORMATEX header */
434 /* returns the size or -1 on error */
435 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
437 int bps, blkalign, bytespersec, frame_size;
439 int waveformatextensible;
441 uint8_t *riff_extradata= temp;
442 uint8_t *riff_extradata_start= temp;
444 if(!enc->codec_tag || enc->codec_tag > 0xffff)
447 /* We use the known constant frame size for the codec if known, otherwise
448 fallback to using AVCodecContext.frame_size, which is not as reliable
449 for indicating packet duration */
450 frame_size = av_get_audio_frame_duration(enc, 0);
452 frame_size = enc->frame_size;
454 waveformatextensible = (enc->channels > 2 && enc->channel_layout)
455 || enc->sample_rate > 48000
456 || av_get_bits_per_sample(enc->codec_id) > 16;
458 if (waveformatextensible) {
459 avio_wl16(pb, 0xfffe);
461 avio_wl16(pb, enc->codec_tag);
463 avio_wl16(pb, enc->channels);
464 avio_wl32(pb, enc->sample_rate);
465 if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3 || enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_G723_1) {
468 if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
469 if (enc->bits_per_coded_sample)
470 bps = enc->bits_per_coded_sample;
472 bps = 16; // default to 16
475 if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
476 av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
479 if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3) {
480 /* this is wrong, but it seems many demuxers do not work if this is set
482 blkalign = frame_size;
483 //blkalign = 144 * enc->bit_rate/enc->sample_rate;
484 } else if (enc->codec_id == AV_CODEC_ID_AC3) {
485 blkalign = 3840; //maximum bytes per frame
486 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
488 } else if (enc->block_align != 0) { /* specified by the codec */
489 blkalign = enc->block_align;
491 blkalign = bps * enc->channels / av_gcd(8, bps);
492 if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
493 enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
494 enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
495 enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
496 enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
497 enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
498 bytespersec = enc->sample_rate * blkalign;
499 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
502 bytespersec = enc->bit_rate / 8;
504 avio_wl32(pb, bytespersec); /* bytes per second */
505 avio_wl16(pb, blkalign); /* block align */
506 avio_wl16(pb, bps); /* bits per sample */
507 if (enc->codec_id == AV_CODEC_ID_MP3) {
509 bytestream_put_le16(&riff_extradata, 1); /* wID */
510 bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
511 bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
512 bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
513 bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
514 } else if (enc->codec_id == AV_CODEC_ID_MP2) {
516 bytestream_put_le16(&riff_extradata, 2); /* fwHeadLayer */
517 bytestream_put_le32(&riff_extradata, enc->bit_rate); /* dwHeadBitrate */
518 bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
519 bytestream_put_le16(&riff_extradata, 0); /* fwHeadModeExt */
520 bytestream_put_le16(&riff_extradata, 1); /* wHeadEmphasis */
521 bytestream_put_le16(&riff_extradata, 16); /* fwHeadFlags */
522 bytestream_put_le32(&riff_extradata, 0); /* dwPTSLow */
523 bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */
524 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
526 bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
527 bytestream_put_le32(&riff_extradata, 0xaea2f732);
528 bytestream_put_le16(&riff_extradata, 0xacde);
529 } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
531 bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */
532 } else if(enc->extradata_size){
533 riff_extradata_start= enc->extradata;
534 riff_extradata= enc->extradata + enc->extradata_size;
535 hdrsize += enc->extradata_size;
537 if(waveformatextensible) { /* write WAVEFORMATEXTENSIBLE extensions */
539 avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
540 avio_wl16(pb, bps); /* ValidBitsPerSample || SamplesPerBlock || Reserved */
541 avio_wl32(pb, enc->channel_layout); /* dwChannelMask */
542 avio_wl32(pb, enc->codec_tag); /* GUID + next 3 */
543 avio_wl32(pb, 0x00100000);
544 avio_wl32(pb, 0xAA000080);
545 avio_wl32(pb, 0x719B3800);
547 avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
549 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
558 /* BITMAPINFOHEADER header */
559 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
561 avio_wl32(pb, 40 + enc->extradata_size); /* size */
562 avio_wl32(pb, enc->width);
563 //We always store RGB TopDown
564 avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
565 avio_wl16(pb, 1); /* planes */
567 avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
568 /* compression type */
569 avio_wl32(pb, enc->codec_tag);
570 avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);
576 avio_write(pb, enc->extradata, enc->extradata_size);
578 if (!for_asf && enc->extradata_size & 1)
581 #endif //CONFIG_MUXERS
584 /* We could be given one of the three possible structures here:
585 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
586 * is an expansion of the previous one with the fields added
587 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
588 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
589 * an openended structure.
591 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
596 codec->codec_type = AVMEDIA_TYPE_AUDIO;
597 codec->channels = avio_rl16(pb);
598 codec->sample_rate = avio_rl32(pb);
599 codec->bit_rate = avio_rl32(pb) * 8;
600 codec->block_align = avio_rl16(pb);
601 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
602 codec->bits_per_coded_sample = 8;
604 codec->bits_per_coded_sample = avio_rl16(pb);
606 codec->codec_tag = 0;
608 codec->codec_tag = id;
609 codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
611 if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
612 int cbSize = avio_rl16(pb); /* cbSize */
614 cbSize = FFMIN(size, cbSize);
615 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
616 ff_asf_guid subformat;
617 int bps = avio_rl16(pb);
619 codec->bits_per_coded_sample = bps;
620 codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
621 ff_get_guid(pb, &subformat);
622 if (!memcmp(subformat + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
623 codec->codec_tag = AV_RL32(subformat);
624 codec->codec_id = ff_wav_codec_get_id(codec->codec_tag, codec->bits_per_coded_sample);
626 codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
627 if (!codec->codec_id)
628 av_log(codec, AV_LOG_WARNING, "unknown subformat:"FF_PRI_GUID"\n", FF_ARG_GUID(subformat));
633 codec->extradata_size = cbSize;
635 av_free(codec->extradata);
636 codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
637 if (!codec->extradata)
638 return AVERROR(ENOMEM);
639 avio_read(pb, codec->extradata, codec->extradata_size);
643 /* It is possible for the chunk to contain garbage at the end */
647 if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
648 /* channels and sample_rate values are those prior to applying SBR and/or PS */
650 codec->sample_rate = 0;
652 /* override bits_per_coded_sample for G.726 */
653 if (codec->codec_id == AV_CODEC_ID_ADPCM_G726)
654 codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
660 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
663 id = ff_codec_get_id(ff_codec_wav_tags, tag);
666 /* handle specific u8 codec */
667 if (id == AV_CODEC_ID_PCM_S16LE && bps == 8)
668 id = AV_CODEC_ID_PCM_U8;
669 if (id == AV_CODEC_ID_PCM_S16LE && bps == 24)
670 id = AV_CODEC_ID_PCM_S24LE;
671 if (id == AV_CODEC_ID_PCM_S16LE && bps == 32)
672 id = AV_CODEC_ID_PCM_S32LE;
673 if (id == AV_CODEC_ID_PCM_F32LE && bps == 64)
674 id = AV_CODEC_ID_PCM_F64LE;
675 if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
676 id = AV_CODEC_ID_PCM_ZORK;
680 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
683 if(esize) *esize = avio_rl32(pb);
685 st->codec->width = avio_rl32(pb);
686 st->codec->height = (int32_t)avio_rl32(pb);
687 avio_rl16(pb); /* planes */
688 st->codec->bits_per_coded_sample= avio_rl16(pb); /* depth */
689 tag1 = avio_rl32(pb);
690 avio_rl32(pb); /* ImageSize */
691 avio_rl32(pb); /* XPelsPerMeter */
692 avio_rl32(pb); /* YPelsPerMeter */
693 avio_rl32(pb); /* ClrUsed */
694 avio_rl32(pb); /* ClrImportant */
697 #endif // CONFIG_DEMUXERS
699 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
702 int audio_frame_size;
704 /* We use the known constant frame size for the codec if known, otherwise
705 fallback to using AVCodecContext.frame_size, which is not as reliable
706 for indicating packet duration */
707 audio_frame_size = av_get_audio_frame_duration(stream, 0);
708 if (!audio_frame_size)
709 audio_frame_size = stream->frame_size;
711 *au_ssize= stream->block_align;
712 if (audio_frame_size && stream->sample_rate) {
713 *au_scale = audio_frame_size;
714 *au_rate= stream->sample_rate;
715 }else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
716 stream->codec_type == AVMEDIA_TYPE_DATA ||
717 stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
718 *au_scale= stream->time_base.num;
719 *au_rate = stream->time_base.den;
721 *au_scale= stream->block_align ? stream->block_align*8 : 8;
722 *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
724 gcd= av_gcd(*au_scale, *au_rate);
729 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
731 av_assert0(sizeof(*g) == 16); //compiler will optimize this out
732 if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
733 memset(*g, 0, sizeof(*g));
736 enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
739 for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++) {
740 if (!ff_guidcmp(guids[i].guid, guid))
743 return AV_CODEC_ID_NONE;
746 int ff_read_riff_info(AVFormatContext *s, int64_t size)
748 int64_t start, end, cur;
749 AVIOContext *pb = s->pb;
751 start = avio_tell(pb);
754 while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
760 chunk_code = avio_rl32(pb);
761 chunk_size = avio_rl32(pb);
762 if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
763 av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
764 return AVERROR_INVALIDDATA;
767 chunk_size += (chunk_size & 1);
769 value = av_malloc(chunk_size + 1);
771 av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
772 return AVERROR(ENOMEM);
775 AV_WL32(key, chunk_code);
777 if (avio_read(pb, value, chunk_size) != chunk_size) {
779 av_log(s, AV_LOG_ERROR, "premature end of file while reading INFO tag\n");
780 return AVERROR_INVALIDDATA;
783 value[chunk_size] = 0;
785 av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);