d39facc783
This fixes several warnings of the type: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
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* Copyright (c) 2005 Francois Revol
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#include <limits.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "libavformat/avformat.h"
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#define PKTFILESUFF "_%08"PRId64"_%02d_%010"PRId64"_%06d_%c.bin"
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#undef strcat
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static int usage(int ret)
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{
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fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
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fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
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fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");
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fprintf(stderr, "-n\twrite No file at all, only demux.\n");
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fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");
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return ret;
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}
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int main(int argc, char **argv)
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{
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char fntemplate[PATH_MAX];
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char pktfilename[PATH_MAX];
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AVFormatContext *fctx;
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AVPacket pkt;
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int64_t pktnum = 0;
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int64_t maxpkts = 0;
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int donotquit = 0;
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int nowrite = 0;
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int err;
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if ((argc > 1) && !strncmp(argv[1], "-", 1)) {
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if (strchr(argv[1], 'w'))
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donotquit = 1;
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if (strchr(argv[1], 'n'))
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nowrite = 1;
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argv++;
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argc--;
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}
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if (argc < 2)
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return usage(1);
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if (argc > 2)
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maxpkts = atoi(argv[2]);
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strncpy(fntemplate, argv[1], PATH_MAX-1);
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if (strrchr(argv[1], '/'))
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strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);
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if (strrchr(fntemplate, '.'))
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*strrchr(fntemplate, '.') = '\0';
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if (strchr(fntemplate, '%')) {
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fprintf(stderr, "can't use filenames containing '%%'\n");
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return usage(1);
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}
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if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {
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fprintf(stderr, "filename too long\n");
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return usage(1);
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}
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strcat(fntemplate, PKTFILESUFF);
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printf("FNTEMPLATE: '%s'\n", fntemplate);
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// register all file formats
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av_register_all();
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err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);
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if (err < 0) {
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fprintf(stderr, "av_open_input_file: error %d\n", err);
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return 1;
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}
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err = av_find_stream_info(fctx);
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if (err < 0) {
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fprintf(stderr, "av_find_stream_info: error %d\n", err);
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return 1;
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}
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av_init_packet(&pkt);
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while ((err = av_read_frame(fctx, &pkt)) >= 0) {
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int fd;
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snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & AV_PKT_FLAG_KEY)?'K':'_');
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printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & AV_PKT_FLAG_KEY)?'K':'_');
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//printf("open(\"%s\")\n", pktfilename);
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if (!nowrite) {
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fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
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err = write(fd, pkt.data, pkt.size);
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if (err < 0) {
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fprintf(stderr, "write: error %d\n", err);
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return 1;
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}
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close(fd);
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}
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av_free_packet(&pkt);
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pktnum++;
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if (maxpkts && (pktnum >= maxpkts))
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break;
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}
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av_close_input_file(fctx);
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while (donotquit)
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sleep(60);
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return 0;
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}
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