PeerStreamer

/*

 * VC-1 test bitstreams format muxer.

 * Copyright (c) 2008 Konstantin Shishkov

 *

 * 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 "avformat.h"

typedef struct RCVContext {

    int frames;

} RCVContext;

static int vc1test_write_header(AVFormatContext *s)

{

    AVCodecContext *avc = s->streams[0]->codec;

    ByteIOContext *pb = s->pb;

    if (avc->codec_id != CODEC_ID_WMV3) {

        av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n");

        return -1;

    }

    put_le24(pb, 0); //frames count will be here

    put_byte(pb, 0xC5);

    put_le32(pb, 4);

    put_buffer(pb, avc->extradata, 4);

    put_le32(pb, avc->height);

    put_le32(pb, avc->width);

    put_le32(pb, 0xC);

    put_le24(pb, 0); // hrd_buffer

    put_byte(pb, 0x80); // level|cbr|res1

    put_le32(pb, 0); // hrd_rate

    if (s->streams[0]->r_frame_rate.den && s->streams[0]->r_frame_rate.num == 1)

        put_le32(pb, s->streams[0]->r_frame_rate.den);

    else

        put_le32(pb, 0xFFFFFFFF); //variable framerate

    av_set_pts_info(s->streams[0], 32, 1, 1000);

    return 0;

}

static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt)

{

    RCVContext *ctx = s->priv_data;

    ByteIOContext *pb = s->pb;

    uint32_t pts = av_rescale(pkt->pts,

                              1000 * (uint64_t)s->streams[0]->time_base.num,

                              s->streams[0]->time_base.den);

    if (!pkt->size)

        return 0;

    put_le32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0));

    put_le32(pb, pts);

    put_buffer(pb, pkt->data, pkt->size);

    put_flush_packet(pb);

    ctx->frames++;

    return 0;

}

static int vc1test_write_trailer(AVFormatContext *s)

{

    RCVContext *ctx = s->priv_data;

    ByteIOContext *pb = s->pb;

    if (!url_is_streamed(s->pb)) {

        url_fseek(pb, 0, SEEK_SET);

        put_le24(pb, ctx->frames);

        put_flush_packet(pb);

    }

    return 0;

}

AVOutputFormat ff_vc1t_muxer = {

    "rcv",

    NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),

    "",

    "rcv",

    sizeof(RCVContext),

    CODEC_ID_NONE,

    CODEC_ID_WMV3,

    vc1test_write_header,

    vc1test_write_packet,

    vc1test_write_trailer,

};