1/*
2 * Copyright (c) 2005 Francois Revol
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "config.h"
22#include <limits.h>
23#include <fcntl.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#if HAVE_UNISTD_H
28#include <unistd.h>
29#endif
30#if HAVE_IO_H
31#include <io.h>
32#endif
33
34#include "libavutil/avstring.h"
35#include "libavutil/time.h"
36#include "libavformat/avformat.h"
37
38#define FILENAME_BUF_SIZE 4096
39#define PKTFILESUFF "_%08" PRId64 "_%02d_%010" PRId64 "_%06d_%c.bin"
40
41static int usage(int ret)
42{
43    fprintf(stderr, "Dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
44    fprintf(stderr, "Each packet is dumped in its own file named like\n");
45    fprintf(stderr, "$(basename file.ext)_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
46    fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");
47    fprintf(stderr, "-n\twrite No file at all, only demux.\n");
48    fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");
49    return ret;
50}
51
52int main(int argc, char **argv)
53{
54    char fntemplate[FILENAME_BUF_SIZE];
55    char pktfilename[FILENAME_BUF_SIZE];
56    AVFormatContext *fctx = NULL;
57    AVPacket pkt;
58    int64_t pktnum  = 0;
59    int64_t maxpkts = 0;
60    int donotquit   = 0;
61    int nowrite     = 0;
62    int err;
63
64    if ((argc > 1) && !strncmp(argv[1], "-", 1)) {
65        if (strchr(argv[1], 'w'))
66            donotquit = 1;
67        if (strchr(argv[1], 'n'))
68            nowrite = 1;
69        argv++;
70        argc--;
71    }
72    if (argc < 2)
73        return usage(1);
74    if (argc > 2)
75        maxpkts = atoi(argv[2]);
76    av_strlcpy(fntemplate, argv[1], sizeof(fntemplate));
77    if (strrchr(argv[1], '/'))
78        av_strlcpy(fntemplate, strrchr(argv[1], '/') + 1, sizeof(fntemplate));
79    if (strrchr(fntemplate, '.'))
80        *strrchr(fntemplate, '.') = '\0';
81    if (strchr(fntemplate, '%')) {
82        fprintf(stderr, "cannot use filenames containing '%%'\n");
83        return usage(1);
84    }
85    if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= sizeof(fntemplate) - 1) {
86        fprintf(stderr, "filename too long\n");
87        return usage(1);
88    }
89    strcat(fntemplate, PKTFILESUFF);
90    printf("FNTEMPLATE: '%s'\n", fntemplate);
91
92    // register all file formats
93    av_register_all();
94
95    err = avformat_open_input(&fctx, argv[1], NULL, NULL);
96    if (err < 0) {
97        fprintf(stderr, "cannot open input: error %d\n", err);
98        return 1;
99    }
100
101    err = avformat_find_stream_info(fctx, NULL);
102    if (err < 0) {
103        fprintf(stderr, "avformat_find_stream_info: error %d\n", err);
104        return 1;
105    }
106
107    av_init_packet(&pkt);
108
109    while ((err = av_read_frame(fctx, &pkt)) >= 0) {
110        int fd;
111        snprintf(pktfilename, sizeof(pktfilename), fntemplate, pktnum,
112                 pkt.stream_index, pkt.pts, pkt.size,
113                 (pkt.flags & AV_PKT_FLAG_KEY) ? 'K' : '_');
114        printf(PKTFILESUFF "\n", pktnum, pkt.stream_index, pkt.pts, pkt.size,
115               (pkt.flags & AV_PKT_FLAG_KEY) ? 'K' : '_');
116        if (!nowrite) {
117            fd  = open(pktfilename, O_WRONLY | O_CREAT, 0644);
118            err = write(fd, pkt.data, pkt.size);
119            if (err < 0) {
120                fprintf(stderr, "write: error %d\n", err);
121                return 1;
122            }
123            close(fd);
124        }
125        av_free_packet(&pkt);
126        pktnum++;
127        if (maxpkts && (pktnum >= maxpkts))
128            break;
129    }
130
131    avformat_close_input(&fctx);
132
133    while (donotquit)
134        av_usleep(60 * 1000000);
135
136    return 0;
137}
138