aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Multipart JPEG format
* Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard
*
* 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 "libavutil/opt.h"
#include "avformat.h"
/* Multipart JPEG */
#define BOUNDARY_TAG "ffmpeg"
typedef struct MPJPEGContext {
AVClass *class;
char *boundary_tag;
} MPJPEGContext;
static int mpjpeg_write_header(AVFormatContext *s)
{
MPJPEGContext *mpj = s->priv_data;
avio_printf(s->pb, "--%s\r\n", mpj->boundary_tag);
avio_flush(s->pb);
return 0;
}
static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MPJPEGContext *mpj = s->priv_data;
avio_printf(s->pb, "Content-type: image/jpeg\r\n");
avio_printf(s->pb, "Content-length: %d\r\n\r\n",
pkt->size);
avio_write(s->pb, pkt->data, pkt->size);
avio_printf(s->pb, "\r\n--%s\r\n", mpj->boundary_tag);
return 0;
}
static int mpjpeg_write_trailer(AVFormatContext *s)
{
return 0;
}
static const AVOption options[] = {
{ "boundary_tag", "Boundary tag", offsetof(MPJPEGContext, boundary_tag), AV_OPT_TYPE_STRING, {.str = BOUNDARY_TAG}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ NULL },
};
static const AVClass mpjpeg_muxer_class = {
.class_name = "mpjpeg_muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_mpjpeg_muxer = {
.name = "mpjpeg",
.long_name = NULL_IF_CONFIG_SMALL("MIME multipart JPEG"),
.mime_type = "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
.extensions = "mjpg",
.priv_data_size = sizeof(MPJPEGContext),
.audio_codec = AV_CODEC_ID_NONE,
.video_codec = AV_CODEC_ID_MJPEG,
.write_header = mpjpeg_write_header,
.write_packet = mpjpeg_write_packet,
.write_trailer = mpjpeg_write_trailer,
.flags = AVFMT_NOTIMESTAMPS,
.priv_class = &mpjpeg_muxer_class,
};
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