1 /*
2 * extract_lzo.c
3 *
4 * Copyright (C) Tilmann Bitterberg - 2003
5 *
6 * This file is part of transcode, a video stream processing tool
7 *
8 * transcode is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * transcode is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with GNU Make; see the file COPYING. If not, write to
20 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
24 #include "transcode.h"
25 #include "libtc/libtc.h"
26 #include "tcinfo.h"
27
28 #include "ioaux.h"
29 #include "avilib/avilib.h"
30 #include "tc.h"
31
32 #ifdef HAVE_LZO
33
34 #include "libtc/tc_lzo.h"
35
36 #define BUFFER_SIZE SIZE_RGB_FRAME<<1
37
long2str(long a,unsigned char * b)38 inline static void long2str(long a, unsigned char *b)
39 {
40 b[0] = (a&0xff000000)>>24;
41 b[1] = (a&0x00ff0000)>>16;
42 b[2] = (a&0x0000ff00)>>8;
43 b[3] = (a&0x000000ff);
44 }
45
extract_lzo(info_t * ipipe)46 void extract_lzo(info_t *ipipe)
47 {
48
49 avi_t *avifile=NULL;
50 char *video;
51
52 int key, error=0;
53
54 long frames, bytes, n;
55
56 switch(ipipe->magic) {
57
58 case TC_MAGIC_AVI:
59
60 // scan file
61 if (ipipe->nav_seek_file) {
62 if(NULL == (avifile = AVI_open_indexfd(ipipe->fd_in,0,ipipe->nav_seek_file))) {
63 AVI_print_error("AVI open");
64 import_exit(1);
65 }
66 } else {
67 if(NULL == (avifile = AVI_open_fd(ipipe->fd_in,1))) {
68 AVI_print_error("AVI open");
69 import_exit(1);
70 }
71 }
72
73 // read video info;
74
75 frames = AVI_video_frames(avifile);
76 if (ipipe->frame_limit[1] < frames)
77 {
78 frames=ipipe->frame_limit[1];
79 }
80
81
82 if(ipipe->verbose & TC_STATS)
83 tc_log_msg(__FILE__, "%ld video frames", frames);
84
85 // allocate space, assume max buffer size
86 if((video = tc_zalloc(SIZE_RGB_FRAME))==NULL) {
87 tc_log_msg(__FILE__, "out of memory");
88 error=1;
89 break;
90 }
91
92 (int)AVI_set_video_position(avifile,ipipe->frame_limit[0]);
93 for (n=ipipe->frame_limit[0]; n<=frames; ++n) {
94 // video
95 if((bytes = AVI_read_frame(avifile, video, &key))<0) {
96 error=1;
97 break;
98 }
99 if(tc_pwrite(ipipe->fd_out, video, bytes)!=bytes) {
100 error=1;
101 break;
102 }
103 }
104
105 free(video);
106
107 break;
108
109 case TC_MAGIC_RAW:
110 default:
111
112 if(ipipe->magic == TC_MAGIC_UNKNOWN)
113 tc_log_warn(__FILE__, "no file type specified, assuming %s",
114 filetype(TC_MAGIC_RAW));
115
116 error = tc_preadwrite(ipipe->fd_in, ipipe->fd_out);
117 if (error < 0)
118 error = 1;
119
120 break;
121 }
122
123 import_exit(error);
124 }
125
126 #else
extract_lzo(info_t * ipipe)127 void extract_lzo(info_t *ipipe)
128 {
129 tc_log_error(__FILE__, "No support for LZO configured -- exiting");
130 import_exit(1);
131 }
132 #endif
133
134