PeerStreamer

/*

 * Copyright (c) 2003 Fabrice Bellard

 * Copyright (c) 2007 Michael Niedermayer

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg 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.

 *

 * FFmpeg 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 FFmpeg; if not, write to the Free Software

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

 */

#include <stdint.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include "libavutil/common.h"

#include "libavformat/avformat.h"

#undef exit

#undef printf

#undef fprintf

static char buffer[20];

static const char *ret_str(int v)

{

    switch (v) {

    case AVERROR_EOF:     return "-EOF";

    case AVERROR(EIO):    return "-EIO";

    case AVERROR(ENOMEM): return "-ENOMEM";

    case AVERROR(EINVAL): return "-EINVAL";

    default:

        snprintf(buffer, sizeof(buffer), "%2d", v);

        return buffer;

    }

}

static void ts_str(char buffer[60], int64_t ts, AVRational base)

{

    double tsval;

    if (ts == AV_NOPTS_VALUE) {

        strcpy(buffer, " NOPTS   ");

        return;

    }

    tsval = ts * av_q2d(base);

    snprintf(buffer, 60, "%9f", tsval);

}

int main(int argc, char **argv)

{

    const char *filename;

    AVFormatContext *ic = NULL;

    int i, ret, stream_id;

    int64_t timestamp;

    AVFormatParameters params, *ap= &params;

    memset(ap, 0, sizeof(params));

    ap->channels=1;

    ap->sample_rate= 22050;

    /* initialize libavcodec, and register all codecs and formats */

    av_register_all();

    if (argc != 2) {

        printf("usage: %s input_file\n"

               "\n", argv[0]);

        exit(1);

    }

    filename = argv[1];

    ret = av_open_input_file(&ic, filename, NULL, 0, ap);

    if (ret < 0) {

        fprintf(stderr, "cannot open %s\n", filename);

        exit(1);

    }

    ret = av_find_stream_info(ic);

    if (ret < 0) {

        fprintf(stderr, "%s: could not find codec parameters\n", filename);

        exit(1);

    }

    for(i=0; ; i++){

        AVPacket pkt;

        AVStream *av_uninit(st);

        char ts_buf[60];

        memset(&pkt, 0, sizeof(pkt));

        if(ret>=0){

            ret= av_read_frame(ic, &pkt);

            if(ret>=0){

                char dts_buf[60];

                st= ic->streams[pkt.stream_index];

                ts_str(dts_buf, pkt.dts, st->time_base);

                ts_str(ts_buf,  pkt.pts, st->time_base);

                printf("ret:%-10s st:%2d flags:%d dts:%s pts:%s pos:%7" PRId64 " size:%6d", ret_str(ret), pkt.stream_index, pkt.flags, dts_buf, ts_buf, pkt.pos, pkt.size);

                av_free_packet(&pkt);

            } else

                printf("ret:%s", ret_str(ret)); // necessary to avoid trailing whitespace

            printf("\n");

        }

        if(i>25) break;

        stream_id= (i>>1)%(ic->nb_streams+1) - 1;

        timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;

        if(stream_id>=0){

            st= ic->streams[stream_id];

            timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);

        }

        //FIXME fully test the new seek API

        if(i&1) ret = avformat_seek_file(ic, stream_id, INT64_MIN, timestamp, timestamp, 0);

        else    ret = avformat_seek_file(ic, stream_id, timestamp, timestamp, INT64_MAX, 0);

        ts_str(ts_buf, timestamp, stream_id < 0 ? AV_TIME_BASE_Q : st->time_base);

        printf("ret:%-10s st:%2d flags:%d  ts:%s\n", ret_str(ret), stream_id, i&1, ts_buf);

    }

    av_close_input_file(ic);

    return 0;

}