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/*
* Image format
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
* Copyright (c) 2004 Michael Niedermayer
*
* 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 "libavutil/intreadwrite.h"
#include "libavutil/avstring.h"
#include "libavutil/log.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "libavutil/opt.h"
typedef struct RenameIO {
AVIOContext *pb;
char filename[1024];
char tmp[1024];
} RenameIO;
typedef struct VideoMuxData {
const AVClass *class; /**< Class for private options. */
int img_number;
int is_pipe;
char path[1024];
int update;
} VideoMuxData;
static int write_header(AVFormatContext *s)
{
VideoMuxData *img = s->priv_data;
av_strlcpy(img->path, s->filename, sizeof(img->path));
/* find format */
if (s->oformat->flags & AVFMT_NOFILE)
img->is_pipe = 0;
else
img->is_pipe = 1;
return 0;
}
static int open_temporary(AVFormatContext *s, RenameIO *out, const char *filename)
{
snprintf(out->tmp, sizeof(out->tmp), "%s.tmp", filename);
av_strlcpy(out->filename, filename, sizeof(out->filename));
if (s->io_open(s, &out->pb, out->tmp, AVIO_FLAG_WRITE, NULL) < 0) {
av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", out->tmp);
return AVERROR(EIO);
}
return 0;
}
static void close_and_rename(AVFormatContext *s, RenameIO *out)
{
ff_format_io_close(s, &out->pb);
ff_rename(out->tmp, out->filename);
}
static int write_packet(AVFormatContext *s, AVPacket *pkt)
{
VideoMuxData *img = s->priv_data;
RenameIO out[3];
char filename[1024];
AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
int i;
if (!img->is_pipe) {
if (img->update) {
av_strlcpy(filename, img->path, sizeof(filename));
} else if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 &&
img->img_number > 1) {
av_log(s, AV_LOG_ERROR,
"Could not get frame filename number %d from pattern '%s'\n",
img->img_number, img->path);
return AVERROR(EIO);
}
for (i = 0; i < 3; i++) {
int ret = open_temporary(s, &out[i], filename);
if (ret < 0)
return ret;
if (par->codec_id != AV_CODEC_ID_RAWVIDEO)
break;
filename[strlen(filename) - 1] = 'U' + i;
}
} else {
out[0].pb = s->pb;
}
if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
int ysize = par->width * par->height;
avio_write(out[0].pb, pkt->data, ysize);
avio_write(out[1].pb, pkt->data + ysize, (pkt->size - ysize) / 2);
avio_write(out[2].pb, pkt->data + ysize + (pkt->size - ysize) / 2, (pkt->size - ysize) / 2);
close_and_rename(s, &out[1]);
close_and_rename(s, &out[2]);
} else {
if (ff_guess_image2_codec(s->filename) == AV_CODEC_ID_JPEG2000) {
AVStream *st = s->streams[0];
if (st->codecpar->extradata_size > 8 &&
AV_RL32(st->codecpar->extradata + 4) == MKTAG('j', 'p', '2', 'h')) {
if (pkt->size < 8 ||
AV_RL32(pkt->data + 4) != MKTAG('j', 'p', '2', 'c'))
goto error;
avio_wb32(out[0].pb, 12);
ffio_wfourcc(out[0].pb, "jP ");
avio_wb32(out[0].pb, 0x0D0A870A); // signature
avio_wb32(out[0].pb, 20);
ffio_wfourcc(out[0].pb, "ftyp");
ffio_wfourcc(out[0].pb, "jp2 ");
avio_wb32(out[0].pb, 0);
ffio_wfourcc(out[0].pb, "jp2 ");
avio_write(out[0].pb, st->codecpar->extradata, st->codecpar->extradata_size);
} else if (pkt->size < 8 ||
(!st->codecpar->extradata_size &&
AV_RL32(pkt->data + 4) != MKTAG('j', 'P', ' ', ' '))) { // signature
error:
av_log(s, AV_LOG_ERROR, "malformed JPEG 2000 codestream\n");
return -1;
}
}
avio_write(out[0].pb, pkt->data, pkt->size);
}
avio_flush(out[0].pb);
if (!img->is_pipe) {
close_and_rename(s, &out[0]);
}
img->img_number++;
return 0;
}
#define OFFSET(x) offsetof(VideoMuxData, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption muxoptions[] = {
{ "start_number", "first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, ENC },
{ "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
{ NULL },
};
#if CONFIG_IMAGE2_MUXER
static const AVClass img2mux_class = {
.class_name = "image2 muxer",
.item_name = av_default_item_name,
.option = muxoptions,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_image2_muxer = {
.name = "image2",
.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
.extensions = "bmp,dpx,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
"ppm,sgi,tga,tif,tiff,jp2,xwd,sun,ras,rs,im1,im8,im24,"
"sunras,webp,xbm,j2c,pix",
.priv_data_size = sizeof(VideoMuxData),
.video_codec = AV_CODEC_ID_MJPEG,
.write_header = write_header,
.write_packet = write_packet,
.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
.priv_class = &img2mux_class,
};
#endif
#if CONFIG_IMAGE2PIPE_MUXER
AVOutputFormat ff_image2pipe_muxer = {
.name = "image2pipe",
.long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
.priv_data_size = sizeof(VideoMuxData),
.video_codec = AV_CODEC_ID_MJPEG,
.write_header = write_header,
.write_packet = write_packet,
.flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
};
#endif
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