271 lines
6.2 KiB
C
271 lines
6.2 KiB
C
/*
|
|
* JPEG based formats
|
|
* Copyright (c) 2000, 2001 Gerard Lantau.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include "avformat.h"
|
|
|
|
/* Multipart JPEG */
|
|
|
|
#define BOUNDARY_TAG "ffserver"
|
|
|
|
static int mpjpeg_write_header(AVFormatContext *s)
|
|
{
|
|
UINT8 buf1[256];
|
|
|
|
snprintf(buf1, sizeof(buf1), "--%s\n", BOUNDARY_TAG);
|
|
put_buffer(&s->pb, buf1, strlen(buf1));
|
|
put_flush_packet(&s->pb);
|
|
return 0;
|
|
}
|
|
|
|
static int mpjpeg_write_packet(AVFormatContext *s, int stream_index,
|
|
UINT8 *buf, int size, int force_pts)
|
|
{
|
|
UINT8 buf1[256];
|
|
|
|
snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\n\n");
|
|
put_buffer(&s->pb, buf1, strlen(buf1));
|
|
put_buffer(&s->pb, buf, size);
|
|
|
|
snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG);
|
|
put_buffer(&s->pb, buf1, strlen(buf1));
|
|
put_flush_packet(&s->pb);
|
|
return 0;
|
|
}
|
|
|
|
static int mpjpeg_write_trailer(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static AVOutputFormat mpjpeg_format = {
|
|
"mpjpeg",
|
|
"Mime multipart JPEG format",
|
|
"multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
|
|
"mjpg",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_MJPEG,
|
|
mpjpeg_write_header,
|
|
mpjpeg_write_packet,
|
|
mpjpeg_write_trailer,
|
|
};
|
|
|
|
|
|
/*************************************/
|
|
/* single frame JPEG */
|
|
|
|
static int single_jpeg_write_header(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int single_jpeg_write_packet(AVFormatContext *s, int stream_index,
|
|
UINT8 *buf, int size, int force_pts)
|
|
{
|
|
put_buffer(&s->pb, buf, size);
|
|
put_flush_packet(&s->pb);
|
|
return 1; /* no more data can be sent */
|
|
}
|
|
|
|
static int single_jpeg_write_trailer(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static AVOutputFormat single_jpeg_format = {
|
|
"singlejpeg",
|
|
"single JPEG image",
|
|
"image/jpeg",
|
|
"jpg,jpeg",
|
|
0,
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_MJPEG,
|
|
single_jpeg_write_header,
|
|
single_jpeg_write_packet,
|
|
single_jpeg_write_trailer,
|
|
};
|
|
|
|
/*************************************/
|
|
/* multiple jpeg images */
|
|
|
|
typedef struct JpegContext {
|
|
char path[1024];
|
|
int img_number;
|
|
} JpegContext;
|
|
|
|
static int jpeg_write_header(AVFormatContext *s1)
|
|
{
|
|
JpegContext *s;
|
|
|
|
s = av_mallocz(sizeof(JpegContext));
|
|
if (!s)
|
|
return -1;
|
|
s1->priv_data = s;
|
|
pstrcpy(s->path, sizeof(s->path), s1->filename);
|
|
s->img_number = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int jpeg_write_packet(AVFormatContext *s1, int stream_index,
|
|
UINT8 *buf, int size, int force_pts)
|
|
{
|
|
JpegContext *s = s1->priv_data;
|
|
char filename[1024];
|
|
ByteIOContext f1, *pb = &f1;
|
|
|
|
if (get_frame_filename(filename, sizeof(filename),
|
|
s->path, s->img_number) < 0)
|
|
return -EIO;
|
|
if (url_fopen(pb, filename, URL_WRONLY) < 0)
|
|
return -EIO;
|
|
|
|
put_buffer(pb, buf, size);
|
|
put_flush_packet(pb);
|
|
|
|
url_fclose(pb);
|
|
s->img_number++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jpeg_write_trailer(AVFormatContext *s1)
|
|
{
|
|
JpegContext *s = s1->priv_data;
|
|
av_free(s);
|
|
return 0;
|
|
}
|
|
|
|
/***/
|
|
|
|
static int jpeg_read_header(AVFormatContext *s1, AVFormatParameters *ap)
|
|
{
|
|
JpegContext *s;
|
|
int i;
|
|
char buf[1024];
|
|
ByteIOContext pb1, *f = &pb1;
|
|
AVStream *st;
|
|
|
|
s = av_mallocz(sizeof(JpegContext));
|
|
if (!s)
|
|
return -1;
|
|
s1->priv_data = s;
|
|
pstrcpy(s->path, sizeof(s->path), s1->filename);
|
|
|
|
s1->nb_streams = 1;
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st) {
|
|
av_free(s);
|
|
return -ENOMEM;
|
|
}
|
|
s1->streams[0] = st;
|
|
s->img_number = 0;
|
|
|
|
/* try to find the first image */
|
|
for(i=0;i<5;i++) {
|
|
if (get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0)
|
|
goto fail;
|
|
if (url_fopen(f, buf, URL_RDONLY) >= 0)
|
|
break;
|
|
s->img_number++;
|
|
}
|
|
if (i == 5)
|
|
goto fail;
|
|
url_fclose(f);
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec.codec_id = CODEC_ID_MJPEG;
|
|
|
|
if (!ap || !ap->frame_rate)
|
|
st->codec.frame_rate = 25 * FRAME_RATE_BASE;
|
|
else
|
|
st->codec.frame_rate = ap->frame_rate;
|
|
return 0;
|
|
fail:
|
|
av_free(s);
|
|
return -EIO;
|
|
}
|
|
|
|
static int jpeg_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
|
{
|
|
JpegContext *s = s1->priv_data;
|
|
char filename[1024];
|
|
int size;
|
|
ByteIOContext f1, *f = &f1;
|
|
|
|
if (get_frame_filename(filename, sizeof(filename),
|
|
s->path, s->img_number) < 0)
|
|
return -EIO;
|
|
|
|
f = &f1;
|
|
if (url_fopen(f, filename, URL_RDONLY) < 0)
|
|
return -EIO;
|
|
|
|
size = url_seek(url_fileno(f), 0, SEEK_END);
|
|
url_seek(url_fileno(f), 0, SEEK_SET);
|
|
|
|
av_new_packet(pkt, size);
|
|
pkt->stream_index = 0;
|
|
get_buffer(f, pkt->data, size);
|
|
|
|
url_fclose(f);
|
|
s->img_number++;
|
|
return 0;
|
|
}
|
|
|
|
static int jpeg_read_close(AVFormatContext *s1)
|
|
{
|
|
JpegContext *s = s1->priv_data;
|
|
av_free(s);
|
|
return 0;
|
|
}
|
|
|
|
static AVInputFormat jpeg_iformat = {
|
|
"jpeg",
|
|
"JPEG image",
|
|
sizeof(JpegContext),
|
|
NULL,
|
|
jpeg_read_header,
|
|
jpeg_read_packet,
|
|
jpeg_read_close,
|
|
NULL,
|
|
flags: AVFMT_NOFILE | AVFMT_NEEDNUMBER,
|
|
extensions: "jpg,jpeg",
|
|
};
|
|
|
|
static AVOutputFormat jpeg_oformat = {
|
|
"jpeg",
|
|
"JPEG image",
|
|
"image/jpeg",
|
|
"jpg,jpeg",
|
|
sizeof(JpegContext),
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_MJPEG,
|
|
jpeg_write_header,
|
|
jpeg_write_packet,
|
|
jpeg_write_trailer,
|
|
flags: AVFMT_NOFILE | AVFMT_NEEDNUMBER,
|
|
};
|
|
|
|
int jpeg_init(void)
|
|
{
|
|
av_register_output_format(&mpjpeg_format);
|
|
av_register_output_format(&single_jpeg_format);
|
|
av_register_input_format(&jpeg_iformat);
|
|
av_register_output_format(&jpeg_oformat);
|
|
return 0;
|
|
}
|