FFmpeg/libavformat/vc1testenc.c
Clément Bœsch 7308439158 lavf: Don't explicitly flush after each written packet in muxers
Since 596e5d4783, this is not necessary anymore. It also allows to
actually disable the flushing, improving write performance (but
possibly giving worse latency in real-time streaming).

Signed-off-by: Martin Storsjö <martin@martin.st>
2013-09-16 22:17:33 +03:00

96 lines
2.9 KiB
C

/*
* VC-1 test bitstreams format muxer.
* Copyright (c) 2008 Konstantin Shishkov
*
* 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 "avformat.h"
#include "internal.h"
typedef struct RCVContext {
int frames;
} RCVContext;
static int vc1test_write_header(AVFormatContext *s)
{
AVCodecContext *avc = s->streams[0]->codec;
AVIOContext *pb = s->pb;
if (avc->codec_id != AV_CODEC_ID_WMV3) {
av_log(s, AV_LOG_ERROR, "Only WMV3 is accepted!\n");
return -1;
}
avio_wl24(pb, 0); //frames count will be here
avio_w8(pb, 0xC5);
avio_wl32(pb, 4);
avio_write(pb, avc->extradata, 4);
avio_wl32(pb, avc->height);
avio_wl32(pb, avc->width);
avio_wl32(pb, 0xC);
avio_wl24(pb, 0); // hrd_buffer
avio_w8(pb, 0x80); // level|cbr|res1
avio_wl32(pb, 0); // hrd_rate
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);
else
avio_wl32(pb, 0xFFFFFFFF); //variable framerate
avpriv_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;
AVIOContext *pb = s->pb;
if (!pkt->size)
return 0;
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);
ctx->frames++;
return 0;
}
static int vc1test_write_trailer(AVFormatContext *s)
{
RCVContext *ctx = s->priv_data;
AVIOContext *pb = s->pb;
if (s->pb->seekable) {
avio_seek(pb, 0, SEEK_SET);
avio_wl24(pb, ctx->frames);
avio_flush(pb);
}
return 0;
}
AVOutputFormat ff_vc1t_muxer = {
.name = "rcv",
.long_name = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),
.mime_type = "",
.extensions = "rcv",
.priv_data_size = sizeof(RCVContext),
.audio_codec = AV_CODEC_ID_NONE,
.video_codec = AV_CODEC_ID_WMV3,
.write_header = vc1test_write_header,
.write_packet = vc1test_write_packet,
.write_trailer = vc1test_write_trailer,
};