vc1testenc.c 2.88 KB
Newer Older
1 2 3 4
/*
 * VC-1 test bitstreams format muxer.
 * Copyright (c) 2008 Konstantin Shishkov
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8 9 10 11
 * 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.
 *
12
 * Libav is distributed in the hope that it will be useful,
13 14 15 16 17
 * 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
18
 * License along with Libav; if not, write to the Free Software
19 20 21
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include "avformat.h"
22
#include "internal.h"
23 24 25 26 27 28 29

typedef struct RCVContext {
    int frames;
} RCVContext;

static int vc1test_write_header(AVFormatContext *s)
{
30
    AVCodecParameters *par = s->streams[0]->codecpar;
31
    AVIOContext *pb = s->pb;
32

33
    if (par->codec_id != AV_CODEC_ID_WMV3) {
34 35 36
        av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n");
        return -1;
    }
37 38 39
    avio_wl24(pb, 0); //frames count will be here
    avio_w8(pb, 0xC5);
    avio_wl32(pb, 4);
40 41 42
    avio_write(pb, par->extradata, 4);
    avio_wl32(pb, par->height);
    avio_wl32(pb, par->width);
43 44 45 46
    avio_wl32(pb, 0xC);
    avio_wl24(pb, 0); // hrd_buffer
    avio_w8(pb, 0x80); // level|cbr|res1
    avio_wl32(pb, 0); // hrd_rate
47 48
    if (s->streams[0]->avg_frame_rate.den && s->streams[0]->avg_frame_rate.num == 1)
        avio_wl32(pb, s->streams[0]->avg_frame_rate.den);
49
    else
50
        avio_wl32(pb, 0xFFFFFFFF); //variable framerate
51
    avpriv_set_pts_info(s->streams[0], 32, 1, 1000);
52 53 54 55 56 57 58

    return 0;
}

static int vc1test_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    RCVContext *ctx = s->priv_data;
59
    AVIOContext *pb = s->pb;
60 61 62

    if (!pkt->size)
        return 0;
63 64 65
    avio_wl32(pb, pkt->size | ((pkt->flags & AV_PKT_FLAG_KEY) ? 0x80000000 : 0));
    avio_wl32(pb, pkt->pts);
    avio_write(pb, pkt->data, pkt->size);
66 67 68 69 70 71 72 73
    ctx->frames++;

    return 0;
}

static int vc1test_write_trailer(AVFormatContext *s)
{
    RCVContext *ctx = s->priv_data;
74
    AVIOContext *pb = s->pb;
75

76
    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
77
        avio_seek(pb, 0, SEEK_SET);
78
        avio_wl24(pb, ctx->frames);
79
        avio_flush(pb);
80 81 82 83
    }
    return 0;
}

84
AVOutputFormat ff_vc1t_muxer = {
85 86 87 88 89
    .name              = "rcv",
    .long_name         = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),
    .mime_type         = "",
    .extensions        = "rcv",
    .priv_data_size    = sizeof(RCVContext),
90 91
    .audio_codec       = AV_CODEC_ID_NONE,
    .video_codec       = AV_CODEC_ID_WMV3,
92 93 94
    .write_header      = vc1test_write_header,
    .write_packet      = vc1test_write_packet,
    .write_trailer     = vc1test_write_trailer,
95
};