146 lines
4.5 KiB
C
Executable file
146 lines
4.5 KiB
C
Executable file
/*
|
|
* SMJPEG muxer
|
|
* Copyright (c) 2012 Paul B Mahol
|
|
*
|
|
* 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
|
|
* This is a muxer for Loki SDL Motion JPEG files
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "smjpeg.h"
|
|
|
|
typedef struct SMJPEGMuxContext {
|
|
uint32_t duration;
|
|
} SMJPEGMuxContext;
|
|
|
|
static int smjpeg_write_header(AVFormatContext *s)
|
|
{
|
|
AVDictionaryEntry *t = NULL;
|
|
AVIOContext *pb = s->pb;
|
|
int n, tag;
|
|
|
|
if (s->nb_streams > 2) {
|
|
av_log(s, AV_LOG_ERROR, "more than >2 streams are not supported\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
avio_write(pb, SMJPEG_MAGIC, 8);
|
|
avio_wb32(pb, 0);
|
|
avio_wb32(pb, 0);
|
|
|
|
ff_standardize_creation_time(s);
|
|
while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
|
|
avio_wl32(pb, SMJPEG_TXT);
|
|
avio_wb32(pb, strlen(t->key) + strlen(t->value) + 3);
|
|
avio_write(pb, t->key, strlen(t->key));
|
|
avio_write(pb, " = ", 3);
|
|
avio_write(pb, t->value, strlen(t->value));
|
|
}
|
|
|
|
for (n = 0; n < s->nb_streams; n++) {
|
|
AVStream *st = s->streams[n];
|
|
AVCodecParameters *par = st->codecpar;
|
|
if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
tag = ff_codec_get_tag(ff_codec_smjpeg_audio_tags, par->codec_id);
|
|
if (!tag) {
|
|
av_log(s, AV_LOG_ERROR, "unsupported audio codec\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
avio_wl32(pb, SMJPEG_SND);
|
|
avio_wb32(pb, 8);
|
|
avio_wb16(pb, par->sample_rate);
|
|
avio_w8(pb, par->bits_per_coded_sample);
|
|
avio_w8(pb, par->channels);
|
|
avio_wl32(pb, tag);
|
|
avpriv_set_pts_info(st, 32, 1, 1000);
|
|
} else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
tag = ff_codec_get_tag(ff_codec_smjpeg_video_tags, par->codec_id);
|
|
if (!tag) {
|
|
av_log(s, AV_LOG_ERROR, "unsupported video codec\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
avio_wl32(pb, SMJPEG_VID);
|
|
avio_wb32(pb, 12);
|
|
avio_wb32(pb, 0);
|
|
avio_wb16(pb, par->width);
|
|
avio_wb16(pb, par->height);
|
|
avio_wl32(pb, tag);
|
|
avpriv_set_pts_info(st, 32, 1, 1000);
|
|
}
|
|
}
|
|
|
|
avio_wl32(pb, SMJPEG_HEND);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
SMJPEGMuxContext *smc = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[pkt->stream_index];
|
|
AVCodecParameters *par = st->codecpar;
|
|
|
|
if (par->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
avio_wl32(pb, SMJPEG_SNDD);
|
|
else if (par->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
avio_wl32(pb, SMJPEG_VIDD);
|
|
else
|
|
return 0;
|
|
|
|
avio_wb32(pb, pkt->pts);
|
|
avio_wb32(pb, pkt->size);
|
|
avio_write(pb, pkt->data, pkt->size);
|
|
|
|
smc->duration = FFMAX(smc->duration, pkt->pts + pkt->duration);
|
|
return 0;
|
|
}
|
|
|
|
static int smjpeg_write_trailer(AVFormatContext *s)
|
|
{
|
|
SMJPEGMuxContext *smc = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t currentpos;
|
|
|
|
if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
|
|
currentpos = avio_tell(pb);
|
|
avio_seek(pb, 12, SEEK_SET);
|
|
avio_wb32(pb, smc->duration);
|
|
avio_seek(pb, currentpos, SEEK_SET);
|
|
}
|
|
|
|
avio_wl32(pb, SMJPEG_DONE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_smjpeg_muxer = {
|
|
.name = "smjpeg",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Loki SDL MJPEG"),
|
|
.priv_data_size = sizeof(SMJPEGMuxContext),
|
|
.audio_codec = AV_CODEC_ID_PCM_S16LE,
|
|
.video_codec = AV_CODEC_ID_MJPEG,
|
|
.write_header = smjpeg_write_header,
|
|
.write_packet = smjpeg_write_packet,
|
|
.write_trailer = smjpeg_write_trailer,
|
|
.flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT,
|
|
.codec_tag = (const AVCodecTag *const []){ ff_codec_smjpeg_video_tags, ff_codec_smjpeg_audio_tags, 0 },
|
|
};
|