mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-23 15:53:08 +00:00
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
|
|
* Adobe Filmstrip muxer
|
|
* Copyright (c) 2010 Peter Ross
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Adobe Filmstrip muxer
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
|
|
#define RAND_TAG MKBETAG('R','a','n','d')
|
|
|
|
typedef struct {
|
|
int nb_frames;
|
|
} FilmstripMuxContext;
|
|
|
|
static int write_header(AVFormatContext *s)
|
|
{
|
|
if (s->streams[0]->codec->pix_fmt != AV_PIX_FMT_RGBA) {
|
|
av_log(s, AV_LOG_ERROR, "only AV_PIX_FMT_RGBA is supported\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
FilmstripMuxContext *film = s->priv_data;
|
|
avio_write(s->pb, pkt->data, pkt->size);
|
|
film->nb_frames++;
|
|
return 0;
|
|
}
|
|
|
|
static int write_trailer(AVFormatContext *s)
|
|
{
|
|
FilmstripMuxContext *film = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
int i;
|
|
|
|
avio_wb32(pb, RAND_TAG);
|
|
avio_wb32(pb, film->nb_frames);
|
|
avio_wb16(pb, 0); // packing method
|
|
avio_wb16(pb, 0); // reserved
|
|
avio_wb16(pb, st->codec->width);
|
|
avio_wb16(pb, st->codec->height);
|
|
avio_wb16(pb, 0); // leading
|
|
avio_wb16(pb, st->codec->time_base.den / st->codec->time_base.num);
|
|
for (i = 0; i < 16; i++)
|
|
avio_w8(pb, 0x00); // reserved
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_filmstrip_muxer = {
|
|
.name = "filmstrip",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Adobe Filmstrip"),
|
|
.extensions = "flm",
|
|
.priv_data_size = sizeof(FilmstripMuxContext),
|
|
.audio_codec = AV_CODEC_ID_NONE,
|
|
.video_codec = AV_CODEC_ID_RAWVIDEO,
|
|
.write_header = write_header,
|
|
.write_packet = write_packet,
|
|
.write_trailer = write_trailer,
|
|
};
|