1 /*******************************************************************************
2 avi_avih.c
3
4 libquicktime - A library for reading and writing quicktime/avi/mp4 files.
5 http://libquicktime.sourceforge.net
6
7 Copyright (C) 2002 Heroine Virtual Ltd.
8 Copyright (C) 2002-2011 Members of the libquicktime project.
9
10 This library is free software; you can redistribute it and/or modify it under
11 the terms of the GNU Lesser General Public License as published by the Free
12 Software Foundation; either version 2.1 of the License, or (at your option)
13 any later version.
14
15 This library is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18 details.
19
20 You should have received a copy of the GNU Lesser General Public License along
21 with this library; if not, write to the Free Software Foundation, Inc., 51
22 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 *******************************************************************************/
24
25 #include "lqt_private.h"
26
27 /*
28 uint32_t dwMicroSecPerFrame;
29 uint32_t dwMaxBytesPerSec;
30 uint32_t dwReserved1;
31 uint32_t dwFlags;
32 uint32_t dwTotalFrames;
33 uint32_t dwInitialFrames;
34 uint32_t dwStreams;
35 uint32_t dwSuggestedBufferSize;
36 uint32_t dwWidth;
37 uint32_t dwHeight;
38 uint32_t dwScale;
39 uint32_t dwRate;
40 uint32_t dwStart;
41 uint32_t dwLength;
42 */
43
quicktime_read_avih(quicktime_t * file,quicktime_avih_t * avih,quicktime_atom_t * parent_atom)44 void quicktime_read_avih(quicktime_t *file,
45 quicktime_avih_t *avih,
46 quicktime_atom_t *parent_atom)
47 {
48 avih->dwMicroSecPerFrame = quicktime_read_int32_le(file);
49 avih->dwMaxBytesPerSec = quicktime_read_int32_le(file);
50 avih->dwReserved1 = quicktime_read_int32_le(file);
51 avih->dwFlags = quicktime_read_int32_le(file);
52 avih->dwTotalFrames = quicktime_read_int32_le(file);
53 avih->dwInitialFrames = quicktime_read_int32_le(file);
54 avih->dwStreams = quicktime_read_int32_le(file);
55 avih->dwSuggestedBufferSize = quicktime_read_int32_le(file);
56 avih->dwWidth = quicktime_read_int32_le(file);
57 avih->dwHeight = quicktime_read_int32_le(file);
58 avih->dwScale = quicktime_read_int32_le(file);
59 avih->dwRate = quicktime_read_int32_le(file);
60 avih->dwStart = quicktime_read_int32_le(file);
61 avih->dwLength = quicktime_read_int32_le(file);
62 }
63
quicktime_write_avih(quicktime_t * file,quicktime_avih_t * avih)64 void quicktime_write_avih(quicktime_t *file,
65 quicktime_avih_t *avih)
66 {
67 quicktime_atom_t avih_atom;
68 quicktime_atom_write_header(file, &avih_atom, "avih");
69
70 quicktime_write_int32_le(file, avih->dwMicroSecPerFrame);
71 quicktime_write_int32_le(file, avih->dwMaxBytesPerSec);
72 quicktime_write_int32_le(file, avih->dwReserved1);
73 quicktime_write_int32_le(file, avih->dwFlags);
74 quicktime_write_int32_le(file, avih->dwTotalFrames);
75 quicktime_write_int32_le(file, avih->dwInitialFrames);
76 quicktime_write_int32_le(file, avih->dwStreams);
77 quicktime_write_int32_le(file, avih->dwSuggestedBufferSize);
78 quicktime_write_int32_le(file, avih->dwWidth);
79 quicktime_write_int32_le(file, avih->dwHeight);
80 quicktime_write_int32_le(file, avih->dwScale);
81 quicktime_write_int32_le(file, avih->dwRate);
82 quicktime_write_int32_le(file, avih->dwStart);
83 quicktime_write_int32_le(file, avih->dwLength);
84 quicktime_atom_write_footer(file, &avih_atom);
85 }
86
quicktime_avih_dump(quicktime_avih_t * avih)87 void quicktime_avih_dump(quicktime_avih_t *avih)
88 {
89 lqt_dump("avih\n");
90 lqt_dump(" dwMicroSecPerFrame: %d\n", avih->dwMicroSecPerFrame);
91 lqt_dump(" dwMaxBytesPerSec: %d\n", avih->dwMaxBytesPerSec);
92 lqt_dump(" dwReserved1: %d\n", avih->dwReserved1);
93 lqt_dump(" dwFlags: %d\n", avih->dwFlags);
94 lqt_dump(" dwTotalFrames: %d\n", avih->dwTotalFrames);
95 lqt_dump(" dwInitialFrames: %d\n", avih->dwInitialFrames);
96 lqt_dump(" dwStreams: %d\n", avih->dwStreams);
97 lqt_dump(" dwSuggestedBufferSize: %d\n", avih->dwSuggestedBufferSize);
98 lqt_dump(" dwWidth: %d\n", avih->dwWidth);
99 lqt_dump(" dwHeight: %d\n", avih->dwHeight);
100 lqt_dump(" dwScale: %d\n", avih->dwScale);
101 lqt_dump(" dwRate: %d\n", avih->dwRate);
102 lqt_dump(" dwStart: %d\n", avih->dwStart);
103 lqt_dump(" dwLength: %d\n", avih->dwLength);
104 }
105
quicktime_avih_init(quicktime_avih_t * avih,quicktime_t * file)106 void quicktime_avih_init(quicktime_avih_t *avih, quicktime_t * file)
107 {
108 if(file->total_vtracks)
109 avih->dwMicroSecPerFrame = (uint32_t)(1000000 / quicktime_frame_rate(file, 0));
110 avih->dwFlags = AVI_HASINDEX | AVI_ISINTERLEAVED;
111 avih->dwStreams = file->total_atracks + file->total_vtracks;
112 // avih->dwSuggestedBufferSize = 1024 * 1024;
113
114 if(file->total_vtracks)
115 {
116 avih->dwWidth = file->vtracks[0].track->tkhd.track_width;
117 avih->dwHeight = file->vtracks[0].track->tkhd.track_height;
118 }
119 }
120