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ffmpeg / libavformat / riff.c @ cba322d7

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1 9d9f4119 Måns Rullgård
/*
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 * RIFF codec tags
3 406792e7 Diego Biurrun
 * Copyright (c) 2000 Fabrice Bellard
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 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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22 245976da Diego Biurrun
#include "libavcodec/avcodec.h"
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#include "avformat.h"
24
#include "riff.h"
25 6e9f56c1 Ronald S. Bultje
#include "libavcodec/bytestream.h"
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27
/* Note: when encoding, the first matching tag is used, so order is
28
   important if multiple tags possible for a given codec. */
29 1a40491e Daniel Verkamp
const AVCodecTag ff_codec_bmp_tags[] = {
30 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_H264,         MKTAG('H', '2', '6', '4') },
31
    { CODEC_ID_H264,         MKTAG('h', '2', '6', '4') },
32
    { CODEC_ID_H264,         MKTAG('X', '2', '6', '4') },
33
    { CODEC_ID_H264,         MKTAG('x', '2', '6', '4') },
34
    { CODEC_ID_H264,         MKTAG('a', 'v', 'c', '1') },
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    { CODEC_ID_H264,         MKTAG('V', 'S', 'S', 'H') },
36
    { CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },
37 26e8d342 Ben Littler
    { CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },
38 d7c6552c Ben Littler
    { CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },
39 26e8d342 Ben Littler
    { CODEC_ID_H263,         MKTAG('L', '2', '6', '3') },
40 62d6f73e Ben Littler
    { CODEC_ID_H263,         MKTAG('V', 'X', '1', 'K') },
41 5aef8462 Michael Niedermayer
    { CODEC_ID_H263,         MKTAG('Z', 'y', 'G', 'o') },
42 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_H263P,        MKTAG('H', '2', '6', '3') },
43
    { CODEC_ID_H263I,        MKTAG('I', '2', '6', '3') }, /* intel h263 */
44
    { CODEC_ID_H261,         MKTAG('H', '2', '6', '1') },
45
    { CODEC_ID_H263P,        MKTAG('U', '2', '6', '3') },
46
    { CODEC_ID_H263P,        MKTAG('v', 'i', 'v', '1') },
47
    { CODEC_ID_MPEG4,        MKTAG('F', 'M', 'P', '4') },
48
    { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', 'X') },
49
    { CODEC_ID_MPEG4,        MKTAG('D', 'X', '5', '0') },
50
    { CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'D') },
51
    { CODEC_ID_MPEG4,        MKTAG('M', 'P', '4', 'S') },
52
    { CODEC_ID_MPEG4,        MKTAG('M', '4', 'S', '2') },
53 36b0782e Aurelien Jacobs
    { CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) }, /* some broken avi use this */
54 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },
55
    { CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },
56
    { CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },
57
    { CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },
58
    { CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },
59
    { CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },
60
    { CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },
61 1b46683c Benjamin Larsson
    { CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },
62 f0feb4d7 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
63 26ae363e Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },
64 4a49a5fd Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },
65 26e8d342 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },
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    { CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },
67
    { CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },
68
    { CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },
69
    { CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },
70
    { CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },
71
    { CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },
72 b8cf645b Michael Niedermayer
    { CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },
73 26e8d342 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') }, /* flipped video */
74 62d6f73e Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },
75 41b0534a Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },
76 4a49a5fd Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },
77 5823e4b8 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
78 76af2edc Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },
79 52837498 Alex Converse
    { CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
80 3596f4e0 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('S', 'N', '4', '0') },
81 6667d5a5 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('V', 'S', 'P', 'X') },
82 5bc3fc21 Ben Littler
    { CODEC_ID_MPEG4,        MKTAG('U', 'L', 'D', 'X') },
83 86d58bcf Michael Niedermayer
    { CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'V') },
84 74c853b6 Carl Eugen Hoyos
    { CODEC_ID_MPEG4,        MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
85 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
86 2d91366c Carl Eugen Hoyos
    { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') },
87 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },
88
    { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },
89
    { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },
90
    { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },
91 4a49a5fd Ben Littler
    { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },
92 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },
93
    { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },
94
    { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },
95
    { CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
96
    { CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
97
    { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
98 26e8d342 Ben Littler
    { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },
99 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
100
    { CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },
101
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },
102
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },
103 f9928b7e Ben Littler
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
104 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },
105
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },
106
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },
107
    { CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
108 13b47b40 Ben Littler
    { CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
109 26e8d342 Ben Littler
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },
110 4bae2251 Ben Littler
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', 's') },
111 c20a305b Baptiste Coudurier
    { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
112 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
113
    { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
114
    { CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },
115
    { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },
116
    { CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },
117 26e8d342 Ben Littler
    { CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },
118 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },
119 36b0782e Aurelien Jacobs
    { CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
120
    { CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
121 bc7ea1e5 Jason Garrett-Glaser
    { CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  16) },
122 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },
123
    { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },
124 6cffaea8 Ben Littler
    { CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
125 483aad71 Michael Niedermayer
    { CODEC_ID_MPEG2VIDEO,   MKTAG('s', 'l', 'i', 'f') },
126 f63e5a74 Carl Eugen Hoyos
    { CODEC_ID_MPEG2VIDEO,   MKTAG('E', 'M', '2', 'V') },
127 77d3f1f7 Tomas Härdin
    { CODEC_ID_MPEG2VIDEO,   MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
128 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },
129
    { CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },
130 26e8d342 Ben Littler
    { CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },
131 94ec3aca Carl Eugen Hoyos
    { CODEC_ID_MJPEG,        MKTAG('m', 'j', 'p', 'a') },
132 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },
133
    { CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
134
    { CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
135 f10d3d34 Francesco Lavra
    { CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'P', 'G') },
136 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
137
    { CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },
138
    { CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },
139
    { CODEC_ID_MJPEG,        MKTAG('A', 'V', 'R', 'n') },
140 65fec2d9 Mike Melanson
    { CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },
141 a9cf309b Ben Littler
    { CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },
142 ed0879ed Ben Littler
    { CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
143 54f8abde Ben Littler
    { CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
144 54089ecd Carl Eugen Hoyos
    { CODEC_ID_MJPEG,        MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
145 dd9d5a1e Carl Eugen Hoyos
    { CODEC_ID_MJPEG,        MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
146 4b86926b Carl Eugen Hoyos
    { CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '1') },
147
    { CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '2') },
148 ab176fdf Carl Eugen Hoyos
    { CODEC_ID_MJPEG,        MKTAG('M', 'T', 'S', 'J') },
149 418a287c Ben Littler
    { CODEC_ID_MJPEG,        MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
150 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },
151
    { CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },
152
    { CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },
153 36b0782e Aurelien Jacobs
    { CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
154 fc3fc029 Jason Garrett-Glaser
    { CODEC_ID_RAWVIDEO,     MKTAG( 3 ,  0 ,  0 ,  0 ) },
155 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },
156
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },
157
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },
158 9853bbb2 Ben Littler
    { CODEC_ID_RAWVIDEO,     MKTAG('V', '4', '2', '2') },
159
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'N', 'V') },
160
    { CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'V') },
161
    { CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'Y') },
162
    { CODEC_ID_RAWVIDEO,     MKTAG('u', 'y', 'v', '1') },
163
    { CODEC_ID_RAWVIDEO,     MKTAG('2', 'V', 'u', '1') },
164 13547dd1 Ben Littler
    { CODEC_ID_RAWVIDEO,     MKTAG('2', 'v', 'u', 'y') },
165 9853bbb2 Ben Littler
    { CODEC_ID_RAWVIDEO,     MKTAG('P', '4', '2', '2') },
166 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },
167
    { CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },
168 e47ca4f7 Ben Littler
    { CODEC_ID_RAWVIDEO,     MKTAG('V', 'Y', 'U', 'Y') },
169 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },
170
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },
171
    { CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },
172 71b0654c Michael Niedermayer
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
173 8be7ac98 ami_stuff
    { CODEC_ID_RAWVIDEO,     MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
174 b43f432c Stefano Sabatini
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', '1') },
175 73762de1 Stefano Sabatini
    { CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '1', '2') },
176
    { CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '2', '1') },
177 781cf5fd Stefano Sabatini
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', 'B') },
178
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', 'B') },
179
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'V', '9') },
180
    { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
181 d8b35b85 Reimar Döffinger
    { CODEC_ID_FRWU,         MKTAG('F', 'R', 'W', 'U') },
182 43836928 Zhou Zongyi
    { CODEC_ID_R10K,         MKTAG('R', '1', '0', 'k') },
183 4aaab0a3 Reimar Döffinger
    { CODEC_ID_R210,         MKTAG('r', '2', '1', '0') },
184 9c4e266c Baptiste Coudurier
    { CODEC_ID_V210,         MKTAG('v', '2', '1', '0') },
185 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },
186
    { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },
187
    { CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },
188
    { CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },
189
    { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },
190
    { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },
191
    { CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },
192
    { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },
193
    { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },
194
    { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },
195 337104ac Anssi Hannula
    { CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },
196 03cb8458 Christian Schmidt
    { CODEC_ID_VP6F,         MKTAG('F', 'L', 'V', '4') },
197 6c7c6293 Google
    { CODEC_ID_VP8,          MKTAG('V', 'P', '8', '0') },
198 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },
199
    { CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },
200
    { CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },
201
    { CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },
202
    { CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },
203 e2260faa Ben Littler
    { CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },
204 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },
205 36b0782e Aurelien Jacobs
    { CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
206 b30cb420 Kostya Shishkov
    { CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },
207 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },
208
    { CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },
209
    { CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },
210
    { CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },
211
    { CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },
212
    { CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },
213
    { CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },
214
    { CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },
215 bf23f6dc Ben Littler
    { CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },
216 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },
217
    { CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },
218
    { CODEC_ID_SNOW,         MKTAG('S', 'N', 'O', 'W') },
219
    { CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },
220
    { CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },
221
    { CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },
222
    { CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },
223
    { CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },
224
    { CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },
225
    { CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },
226
    { CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },
227
    { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },
228
    { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },
229
    { CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },
230 cba322d7 Kostya Shishkov
    { CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', 'P') },
231 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },
232
    { CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },
233
    { CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },
234
    { CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },
235
    { CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },
236
    { CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },
237
    { CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },
238
    { CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },
239
    { CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },
240
    { CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },
241
    { CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },
242
    { CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },
243
    { CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },
244
    { CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },
245
    { CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },
246
    { CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },
247 f86cd761 Ben Littler
    { CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },
248 0dccbba0 Thilo Borgmann
    { CODEC_ID_PNG,          MKTAG('P', 'N', 'G', '1') },
249 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_CLJR,         MKTAG('c', 'l', 'j', 'r') },
250 eb64714c Anuradha Suraparaju
    { CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },
251 65fec2d9 Mike Melanson
    { CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },
252 c6340f86 Ben Littler
    { CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },
253
    { CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },
254 e80c73b3 Eli Friedman
    { CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },
255 c21fbefb Kostya Shishkov
    { CODEC_ID_AURA,         MKTAG('A', 'U', 'R', 'A') },
256
    { CODEC_ID_AURA2,        MKTAG('A', 'U', 'R', '2') },
257 94d3d6a4 Jimmy Christensen
    { CODEC_ID_DPX,          MKTAG('d', 'p', 'x', ' ') },
258 bf354122 Daniel Verkamp
    { CODEC_ID_KGV1,         MKTAG('K', 'G', 'V', '1') },
259 ab0b2e55 Aurelien Jacobs
    { CODEC_ID_NONE,         0 }
260 9d9f4119 Måns Rullgård
};
261
262 1a40491e Daniel Verkamp
const AVCodecTag ff_codec_wav_tags[] = {
263 8af9090f Diego Biurrun
    { CODEC_ID_PCM_S16LE,       0x0001 },
264
    { CODEC_ID_PCM_U8,          0x0001 }, /* must come after s16le in this list */
265
    { CODEC_ID_PCM_S24LE,       0x0001 },
266
    { CODEC_ID_PCM_S32LE,       0x0001 },
267
    { CODEC_ID_ADPCM_MS,        0x0002 },
268 57406d8e Peter Ross
    { CODEC_ID_PCM_F32LE,       0x0003 },
269
    { CODEC_ID_PCM_F64LE,       0x0003 }, /* must come after f32le in this list */
270 8af9090f Diego Biurrun
    { CODEC_ID_PCM_ALAW,        0x0006 },
271
    { CODEC_ID_PCM_MULAW,       0x0007 },
272
    { CODEC_ID_WMAVOICE,        0x000A },
273
    { CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
274 4e0e6888 Peter Ross
    { CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
275 8af9090f Diego Biurrun
    { CODEC_ID_ADPCM_YAMAHA,    0x0020 },
276
    { CODEC_ID_TRUESPEECH,      0x0022 },
277
    { CODEC_ID_GSM_MS,          0x0031 },
278
    { CODEC_ID_ADPCM_G726,      0x0045 },
279
    { CODEC_ID_MP2,             0x0050 },
280
    { CODEC_ID_MP3,             0x0055 },
281 c26436ec Ben Littler
    { CODEC_ID_AMR_NB,          0x0057 },
282
    { CODEC_ID_AMR_WB,          0x0058 },
283 8af9090f Diego Biurrun
    { CODEC_ID_ADPCM_IMA_DK4,   0x0061 },  /* rogue format number */
284
    { CODEC_ID_ADPCM_IMA_DK3,   0x0062 },  /* rogue format number */
285 4becee23 Stefan Gehrer
    { CODEC_ID_ADPCM_IMA_WAV,   0x0069 },
286 8af9090f Diego Biurrun
    { CODEC_ID_VOXWARE,         0x0075 },
287
    { CODEC_ID_AAC,             0x00ff },
288 faeedbbb Benjamin Larsson
    { CODEC_ID_SIPR,            0x0130 },
289 8af9090f Diego Biurrun
    { CODEC_ID_WMAV1,           0x0160 },
290
    { CODEC_ID_WMAV2,           0x0161 },
291
    { CODEC_ID_WMAPRO,          0x0162 },
292 800b9c24 Benjamin Larsson
    { CODEC_ID_WMALOSSLESS,     0x0163 },
293 8af9090f Diego Biurrun
    { CODEC_ID_ADPCM_CT,        0x0200 },
294
    { CODEC_ID_ATRAC3,          0x0270 },
295
    { CODEC_ID_IMC,             0x0401 },
296 4bf2b9e8 Ben Littler
    { CODEC_ID_GSM_MS,          0x1500 },
297
    { CODEC_ID_TRUESPEECH,      0x1501 },
298 8af9090f Diego Biurrun
    { CODEC_ID_AC3,             0x2000 },
299
    { CODEC_ID_DTS,             0x2001 },
300
    { CODEC_ID_SONIC,           0x2048 },
301
    { CODEC_ID_SONIC_LS,        0x2048 },
302 8e6e9bac Jai Menon
    { CODEC_ID_PCM_MULAW,       0x6c75 },
303 8af9090f Diego Biurrun
    { CODEC_ID_AAC,             0x706d },
304 6cffaea8 Ben Littler
    { CODEC_ID_AAC,             0x4143 },
305 8af9090f Diego Biurrun
    { CODEC_ID_FLAC,            0xF1AC },
306
    { CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },
307
    { CODEC_ID_VORBIS,          ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
308 6ae177aa Diego Biurrun
309
    /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
310 9d9f4119 Måns Rullgård
    // for NuppelVideo (nuv.c)
311
    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
312 8af9090f Diego Biurrun
    { CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
313
    { CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
314 bc2d2a07 Carl Eugen Hoyos
    { CODEC_ID_NONE,      0 },
315 9d9f4119 Måns Rullgård
};
316
317 b250f9c6 Aurelien Jacobs
#if CONFIG_MUXERS
318 1a40491e Daniel Verkamp
int64_t ff_start_tag(ByteIOContext *pb, const char *tag)
319 9d9f4119 Måns Rullgård
{
320
    put_tag(pb, tag);
321
    put_le32(pb, 0);
322
    return url_ftell(pb);
323
}
324
325 1a40491e Daniel Verkamp
void ff_end_tag(ByteIOContext *pb, int64_t start)
326 9d9f4119 Måns Rullgård
{
327 bc5c918e Diego Biurrun
    int64_t pos;
328 9d9f4119 Måns Rullgård
329
    pos = url_ftell(pb);
330
    url_fseek(pb, start - 4, SEEK_SET);
331
    put_le32(pb, (uint32_t)(pos - start));
332
    url_fseek(pb, pos, SEEK_SET);
333
}
334
335
/* WAVEFORMATEX header */
336
/* returns the size or -1 on error */
337 1a40491e Daniel Verkamp
int ff_put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
338 9d9f4119 Måns Rullgård
{
339
    int bps, blkalign, bytespersec;
340
    int hdrsize = 18;
341 6e9f56c1 Ronald S. Bultje
    int waveformatextensible;
342
    uint8_t temp[256];
343
    uint8_t *riff_extradata= temp;
344
    uint8_t *riff_extradata_start= temp;
345 9d9f4119 Måns Rullgård
346
    if(!enc->codec_tag || enc->codec_tag > 0xffff)
347
        return -1;
348 2c2a167c Michael Niedermayer
    waveformatextensible =   (enc->channels > 2 && enc->channel_layout)
349
                          || enc->sample_rate > 48000
350
                          || av_get_bits_per_sample(enc->codec_id) > 16;
351 9d9f4119 Måns Rullgård
352 6e9f56c1 Ronald S. Bultje
    if (waveformatextensible) {
353
        put_le16(pb, 0xfffe);
354
    } else {
355 4bce3ba4 Ronald S. Bultje
        put_le16(pb, enc->codec_tag);
356 6e9f56c1 Ronald S. Bultje
    }
357 9d9f4119 Måns Rullgård
    put_le16(pb, enc->channels);
358
    put_le32(pb, enc->sample_rate);
359 235a51ad Baptiste Coudurier
    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
360 9d9f4119 Måns Rullgård
        bps = 0;
361 9df9b810 Daniel Verkamp
    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) {
362 9d9f4119 Måns Rullgård
        bps = 4;
363
    } else {
364 24b8aa84 Baptiste Coudurier
        if (!(bps = av_get_bits_per_sample(enc->codec_id)))
365
            bps = 16; // default to 16
366 9d9f4119 Måns Rullgård
    }
367 dd1c8f3e Luca Abeni
    if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
368
        av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
369 9376710d Michael Niedermayer
    }
370 9d9f4119 Måns Rullgård
371 52cf3954 Baptiste Coudurier
    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_AC3) {
372 755bfeab Diego Biurrun
        blkalign = enc->frame_size; //this is wrong, but it seems many demuxers do not work if this is set correctly
373 9d9f4119 Måns Rullgård
        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
374
    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
375
        blkalign = 1;
376
    } else if (enc->block_align != 0) { /* specified by the codec */
377
        blkalign = enc->block_align;
378
    } else
379
        blkalign = enc->channels*bps >> 3;
380
    if (enc->codec_id == CODEC_ID_PCM_U8 ||
381
        enc->codec_id == CODEC_ID_PCM_S24LE ||
382
        enc->codec_id == CODEC_ID_PCM_S32LE ||
383 57406d8e Peter Ross
        enc->codec_id == CODEC_ID_PCM_F32LE ||
384
        enc->codec_id == CODEC_ID_PCM_F64LE ||
385 9d9f4119 Måns Rullgård
        enc->codec_id == CODEC_ID_PCM_S16LE) {
386
        bytespersec = enc->sample_rate * blkalign;
387
    } else {
388
        bytespersec = enc->bit_rate / 8;
389
    }
390
    put_le32(pb, bytespersec); /* bytes per second */
391
    put_le16(pb, blkalign); /* block align */
392
    put_le16(pb, bps); /* bits per sample */
393
    if (enc->codec_id == CODEC_ID_MP3) {
394
        hdrsize += 12;
395 6e9f56c1 Ronald S. Bultje
        bytestream_put_le16(&riff_extradata, 1);    /* wID */
396
        bytestream_put_le32(&riff_extradata, 2);    /* fdwFlags */
397
        bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
398
        bytestream_put_le16(&riff_extradata, 1);    /* nFramesPerBlock */
399
        bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
400 9d9f4119 Måns Rullgård
    } else if (enc->codec_id == CODEC_ID_MP2) {
401
        hdrsize += 22;
402 6e9f56c1 Ronald S. Bultje
        bytestream_put_le16(&riff_extradata, 2);                          /* fwHeadLayer */
403
        bytestream_put_le32(&riff_extradata, enc->bit_rate);              /* dwHeadBitrate */
404
        bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
405
        bytestream_put_le16(&riff_extradata, 0);                          /* fwHeadModeExt */
406
        bytestream_put_le16(&riff_extradata, 1);                          /* wHeadEmphasis */
407
        bytestream_put_le16(&riff_extradata, 16);                         /* fwHeadFlags */
408
        bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSLow */
409
        bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSHigh */
410 c81604f8 Zhentan Feng
    } else if (enc->codec_id == CODEC_ID_GSM_MS || enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
411 9d9f4119 Måns Rullgård
        hdrsize += 2;
412 6e9f56c1 Ronald S. Bultje
        bytestream_put_le16(&riff_extradata, enc->frame_size); /* wSamplesPerBlock */
413 9d9f4119 Måns Rullgård
    } else if(enc->extradata_size){
414 6e9f56c1 Ronald S. Bultje
        riff_extradata_start= enc->extradata;
415
        riff_extradata= enc->extradata + enc->extradata_size;
416 9d9f4119 Måns Rullgård
        hdrsize += enc->extradata_size;
417 6e9f56c1 Ronald S. Bultje
    } else if (!waveformatextensible){
418
        hdrsize -= 2;
419
    }
420
    if(waveformatextensible) {                                    /* write WAVEFORMATEXTENSIBLE extensions */
421
        hdrsize += 22;
422
        put_le16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
423
        put_le16(pb, enc->bits_per_coded_sample);                 /* ValidBitsPerSample || SamplesPerBlock || Reserved */
424
        put_le32(pb, enc->channel_layout);                        /* dwChannelMask */
425
        put_le32(pb, enc->codec_tag);                             /* GUID + next 3 */
426
        put_le32(pb, 0x00100000);
427
        put_le32(pb, 0xAA000080);
428
        put_le32(pb, 0x719B3800);
429
    } else if(riff_extradata - riff_extradata_start) {
430
        put_le16(pb, riff_extradata - riff_extradata_start);
431
    }
432
    put_buffer(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
433 4bce3ba4 Ronald S. Bultje
    if(hdrsize&1){
434
        hdrsize++;
435
        put_byte(pb, 0);
436
    }
437 9d9f4119 Måns Rullgård
438
    return hdrsize;
439
}
440
441
/* BITMAPINFOHEADER header */
442 1a40491e Daniel Verkamp
void ff_put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
443 9d9f4119 Måns Rullgård
{
444
    put_le32(pb, 40 + enc->extradata_size); /* size */
445
    put_le32(pb, enc->width);
446 31f2616d Michael Niedermayer
    //We always store RGB TopDown
447
    put_le32(pb, enc->codec_tag ? enc->height : -enc->height);
448 9d9f4119 Måns Rullgård
    put_le16(pb, 1); /* planes */
449
450 dd1c8f3e Luca Abeni
    put_le16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
451 9d9f4119 Måns Rullgård
    /* compression type */
452 bb85077f Michael Niedermayer
    put_le32(pb, enc->codec_tag);
453 9d9f4119 Måns Rullgård
    put_le32(pb, enc->width * enc->height * 3);
454
    put_le32(pb, 0);
455
    put_le32(pb, 0);
456
    put_le32(pb, 0);
457
    put_le32(pb, 0);
458
459
    put_buffer(pb, enc->extradata, enc->extradata_size);
460
461 63100f58 Anton Khirnov
    if (!for_asf && enc->extradata_size & 1)
462 9d9f4119 Måns Rullgård
        put_byte(pb, 0);
463
}
464
#endif //CONFIG_MUXERS
465
466 b250f9c6 Aurelien Jacobs
#if CONFIG_DEMUXERS
467 9d9f4119 Måns Rullgård
/* We could be given one of the three possible structures here:
468
 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
469
 * is an expansion of the previous one with the fields added
470
 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
471
 * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
472
 * an openended structure.
473
 */
474 1a40491e Daniel Verkamp
void ff_get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
475 9d9f4119 Måns Rullgård
{
476
    int id;
477
478
    id = get_le16(pb);
479 72415b2a Stefano Sabatini
    codec->codec_type = AVMEDIA_TYPE_AUDIO;
480 9d9f4119 Måns Rullgård
    codec->codec_tag = id;
481
    codec->channels = get_le16(pb);
482
    codec->sample_rate = get_le32(pb);
483
    codec->bit_rate = get_le32(pb) * 8;
484
    codec->block_align = get_le16(pb);
485
    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
486 dd1c8f3e Luca Abeni
        codec->bits_per_coded_sample = 8;
487 9d9f4119 Måns Rullgård
    }else
488 dd1c8f3e Luca Abeni
        codec->bits_per_coded_sample = get_le16(pb);
489 72fd40bd Baptiste Coudurier
    if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */
490
        int cbSize = get_le16(pb); /* cbSize */
491
        size -= 18;
492
        cbSize = FFMIN(size, cbSize);
493
        if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
494 dd1c8f3e Luca Abeni
            codec->bits_per_coded_sample = get_le16(pb);
495 4fd71a0e Peter Ross
            codec->channel_layout = get_le32(pb); /* dwChannelMask */
496 72fd40bd Baptiste Coudurier
            id = get_le32(pb); /* 4 first bytes of GUID */
497
            url_fskip(pb, 12); /* skip end of GUID */
498
            cbSize -= 22;
499
            size -= 22;
500
        }
501
        codec->extradata_size = cbSize;
502
        if (cbSize > 0) {
503 9d9f4119 Måns Rullgård
            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
504
            get_buffer(pb, codec->extradata, codec->extradata_size);
505 72fd40bd Baptiste Coudurier
            size -= cbSize;
506
        }
507 9d9f4119 Måns Rullgård
508
        /* It is possible for the chunk to contain garbage at the end */
509 72fd40bd Baptiste Coudurier
        if (size > 0)
510
            url_fskip(pb, size);
511 9d9f4119 Måns Rullgård
    }
512 1a40491e Daniel Verkamp
    codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
513 9d9f4119 Måns Rullgård
}
514
515
516 1a40491e Daniel Verkamp
enum CodecID ff_wav_codec_get_id(unsigned int tag, int bps)
517 9d9f4119 Måns Rullgård
{
518 9f2ace74 Carl Eugen Hoyos
    enum CodecID id;
519 1a40491e Daniel Verkamp
    id = ff_codec_get_id(ff_codec_wav_tags, tag);
520 9d9f4119 Måns Rullgård
    if (id <= 0)
521
        return id;
522
    /* handle specific u8 codec */
523
    if (id == CODEC_ID_PCM_S16LE && bps == 8)
524
        id = CODEC_ID_PCM_U8;
525
    if (id == CODEC_ID_PCM_S16LE && bps == 24)
526
        id = CODEC_ID_PCM_S24LE;
527
    if (id == CODEC_ID_PCM_S16LE && bps == 32)
528
        id = CODEC_ID_PCM_S32LE;
529 57406d8e Peter Ross
    if (id == CODEC_ID_PCM_F32LE && bps == 64)
530
        id = CODEC_ID_PCM_F64LE;
531 a11c2a2c Michael Niedermayer
    if (id == CODEC_ID_ADPCM_IMA_WAV && bps == 8)
532
        id = CODEC_ID_PCM_ZORK;
533 9d9f4119 Måns Rullgård
    return id;
534
}
535
#endif // CONFIG_DEMUXERS
536
537
void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
538
{
539
    int gcd;
540
541
    *au_ssize= stream->block_align;
542
    if(stream->frame_size && stream->sample_rate){
543
        *au_scale=stream->frame_size;
544
        *au_rate= stream->sample_rate;
545 72415b2a Stefano Sabatini
    }else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
546
             stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
547 9d9f4119 Måns Rullgård
        *au_scale= stream->time_base.num;
548
        *au_rate = stream->time_base.den;
549
    }else{
550
        *au_scale= stream->block_align ? stream->block_align*8 : 8;
551 a7805e29 Michael Niedermayer
        *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
552 9d9f4119 Måns Rullgård
    }
553 9ce6c138 Aurelien Jacobs
    gcd= av_gcd(*au_scale, *au_rate);
554 9d9f4119 Måns Rullgård
    *au_scale /= gcd;
555
    *au_rate /= gcd;
556
}