PeerStreamer

/*

 * Copyright (c) 2005 Francois Revol

 *

 * This file is part of Libav.

 *

 * Libav is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * Libav is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include <limits.h>

#include <fcntl.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "libavformat/avformat.h"

#define PKTFILESUFF "_%08"PRId64"_%02d_%010"PRId64"_%06d_%c.bin"

#undef strcat

static int usage(int ret)

{

    fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");

    fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");

    fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");

    fprintf(stderr, "-n\twrite No file at all, only demux.\n");

    fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");

    return ret;

}

int main(int argc, char **argv)

{

    char fntemplate[PATH_MAX];

    char pktfilename[PATH_MAX];

    AVFormatContext *fctx;

    AVPacket pkt;

    int64_t pktnum = 0;

    int64_t maxpkts = 0;

    int donotquit = 0;

    int nowrite = 0;

    int err;

    if ((argc > 1) && !strncmp(argv[1], "-", 1)) {

        if (strchr(argv[1], 'w'))

            donotquit = 1;

        if (strchr(argv[1], 'n'))

            nowrite = 1;

        argv++;

        argc--;

    }

    if (argc < 2)

        return usage(1);

    if (argc > 2)

        maxpkts = atoi(argv[2]);

    strncpy(fntemplate, argv[1], PATH_MAX-1);

    if (strrchr(argv[1], '/'))

        strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);

    if (strrchr(fntemplate, '.'))

        *strrchr(fntemplate, '.') = '\0';

    if (strchr(fntemplate, '%')) {

        fprintf(stderr, "can't use filenames containing '%%'\n");

        return usage(1);

    }

    if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {

        fprintf(stderr, "filename too long\n");

        return usage(1);

    }

    strcat(fntemplate, PKTFILESUFF);

    printf("FNTEMPLATE: '%s'\n", fntemplate);

    // register all file formats

    av_register_all();

    err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);

    if (err < 0) {

        fprintf(stderr, "av_open_input_file: error %d\n", err);

        return 1;

    }

    err = av_find_stream_info(fctx);

    if (err < 0) {

        fprintf(stderr, "av_find_stream_info: error %d\n", err);

        return 1;

    }

    av_init_packet(&pkt);

    while ((err = av_read_frame(fctx, &pkt)) >= 0) {

        int fd;

        snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & AV_PKT_FLAG_KEY)?'K':'_');

        printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & AV_PKT_FLAG_KEY)?'K':'_');

        //printf("open(\"%s\")\n", pktfilename);

        if (!nowrite) {

            fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);

            err = write(fd, pkt.data, pkt.size);

            if (err < 0) {

                fprintf(stderr, "write: error %d\n", err);

                return 1;

            }

            close(fd);

        }

        av_free_packet(&pkt);

        pktnum++;

        if (maxpkts && (pktnum >= maxpkts))

            break;

    }

    av_close_input_file(fctx);

    while (donotquit)

        sleep(60);

    return 0;

}