mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-27 01:42:20 +00:00
337 lines
10 KiB
C
337 lines
10 KiB
C
/*
|
|
* 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/avstring.h"
|
|
#include "libavutil/log.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct {
|
|
const AVClass *class; /**< Class for private options. */
|
|
int img_first;
|
|
int img_last;
|
|
int img_number;
|
|
int img_count;
|
|
int is_pipe;
|
|
char path[1024];
|
|
char *pixel_format; /**< Set by a private option. */
|
|
char *video_size; /**< Set by a private option. */
|
|
char *framerate; /**< Set by a private option. */
|
|
int loop;
|
|
int start_number;
|
|
} VideoDemuxData;
|
|
|
|
static const int sizes[][2] = {
|
|
{ 640, 480 },
|
|
{ 720, 480 },
|
|
{ 720, 576 },
|
|
{ 352, 288 },
|
|
{ 352, 240 },
|
|
{ 160, 128 },
|
|
{ 512, 384 },
|
|
{ 640, 352 },
|
|
{ 640, 240 },
|
|
};
|
|
|
|
static int infer_size(int *width_ptr, int *height_ptr, int size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
|
|
if ((sizes[i][0] * sizes[i][1]) == size) {
|
|
*width_ptr = sizes[i][0];
|
|
*height_ptr = sizes[i][1];
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* return -1 if no image found */
|
|
static int find_image_range(int *pfirst_index, int *plast_index,
|
|
const char *path, int max_start)
|
|
{
|
|
char buf[1024];
|
|
int range, last_index, range1, first_index;
|
|
|
|
/* find the first image */
|
|
for (first_index = 0; first_index < max_start; first_index++) {
|
|
if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
|
|
*pfirst_index =
|
|
*plast_index = 1;
|
|
if (avio_check(buf, AVIO_FLAG_READ) > 0)
|
|
return 0;
|
|
return -1;
|
|
}
|
|
if (avio_check(buf, AVIO_FLAG_READ) > 0)
|
|
break;
|
|
}
|
|
if (first_index == 5)
|
|
goto fail;
|
|
|
|
/* find the last image */
|
|
last_index = first_index;
|
|
for (;;) {
|
|
range = 0;
|
|
for (;;) {
|
|
if (!range)
|
|
range1 = 1;
|
|
else
|
|
range1 = 2 * range;
|
|
if (av_get_frame_filename(buf, sizeof(buf), path,
|
|
last_index + range1) < 0)
|
|
goto fail;
|
|
if (avio_check(buf, AVIO_FLAG_READ) <= 0)
|
|
break;
|
|
range = range1;
|
|
/* just in case... */
|
|
if (range >= (1 << 30))
|
|
goto fail;
|
|
}
|
|
/* we are sure than image last_index + range exists */
|
|
if (!range)
|
|
break;
|
|
last_index += range;
|
|
}
|
|
*pfirst_index = first_index;
|
|
*plast_index = last_index;
|
|
return 0;
|
|
|
|
fail:
|
|
return -1;
|
|
}
|
|
|
|
static int img_read_probe(AVProbeData *p)
|
|
{
|
|
if (p->filename && ff_guess_image2_codec(p->filename)) {
|
|
if (av_filename_number_test(p->filename))
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return AVPROBE_SCORE_EXTENSION;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int img_read_header(AVFormatContext *s1)
|
|
{
|
|
VideoDemuxData *s = s1->priv_data;
|
|
int first_index, last_index, ret = 0;
|
|
int width = 0, height = 0;
|
|
AVStream *st;
|
|
enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
|
|
AVRational framerate;
|
|
|
|
s1->ctx_flags |= AVFMTCTX_NOHEADER;
|
|
|
|
st = avformat_new_stream(s1, NULL);
|
|
if (!st) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if (s->pixel_format &&
|
|
(pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
|
|
av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
|
|
s->pixel_format);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (s->video_size &&
|
|
(ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Could not parse video size: %s.\n", s->video_size);
|
|
return ret;
|
|
}
|
|
if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Could not parse framerate: %s.\n", s->framerate);
|
|
return ret;
|
|
}
|
|
|
|
av_strlcpy(s->path, s1->filename, sizeof(s->path));
|
|
s->img_number = 0;
|
|
s->img_count = 0;
|
|
|
|
/* find format */
|
|
if (s1->iformat->flags & AVFMT_NOFILE)
|
|
s->is_pipe = 0;
|
|
else {
|
|
s->is_pipe = 1;
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
}
|
|
|
|
avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
|
|
|
|
if (width && height) {
|
|
st->codec->width = width;
|
|
st->codec->height = height;
|
|
}
|
|
|
|
if (!s->is_pipe) {
|
|
if (find_image_range(&first_index, &last_index, s->path,
|
|
FFMAX(s->start_number, 5)) < 0)
|
|
return AVERROR(ENOENT);
|
|
s->img_first = first_index;
|
|
s->img_last = last_index;
|
|
s->img_number = first_index;
|
|
/* compute duration */
|
|
st->start_time = 0;
|
|
st->duration = last_index - first_index + 1;
|
|
}
|
|
|
|
if (s1->video_codec_id) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = s1->video_codec_id;
|
|
} else if (s1->audio_codec_id) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->codec_id = s1->audio_codec_id;
|
|
} else {
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = ff_guess_image2_codec(s->path);
|
|
}
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
|
|
pix_fmt != AV_PIX_FMT_NONE)
|
|
st->codec->pix_fmt = pix_fmt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
|
{
|
|
VideoDemuxData *s = s1->priv_data;
|
|
char filename[1024];
|
|
int i, res;
|
|
int size[3] = { 0 }, ret[3] = { 0 };
|
|
AVIOContext *f[3] = { NULL };
|
|
AVCodecContext *codec = s1->streams[0]->codec;
|
|
|
|
if (!s->is_pipe) {
|
|
/* loop over input */
|
|
if (s->loop && s->img_number > s->img_last) {
|
|
s->img_number = s->img_first;
|
|
}
|
|
if (s->img_number > s->img_last)
|
|
return AVERROR_EOF;
|
|
if (av_get_frame_filename(filename, sizeof(filename),
|
|
s->path,
|
|
s->img_number) < 0 && s->img_number > 1)
|
|
return AVERROR(EIO);
|
|
for (i = 0; i < 3; i++) {
|
|
if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
|
|
&s1->interrupt_callback, NULL) < 0) {
|
|
if (i >= 1)
|
|
break;
|
|
av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
|
|
filename);
|
|
return AVERROR(EIO);
|
|
}
|
|
size[i] = avio_size(f[i]);
|
|
|
|
if (codec->codec_id != AV_CODEC_ID_RAWVIDEO)
|
|
break;
|
|
filename[strlen(filename) - 1] = 'U' + i;
|
|
}
|
|
|
|
if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
|
|
infer_size(&codec->width, &codec->height, size[0]);
|
|
} else {
|
|
f[0] = s1->pb;
|
|
if (f[0]->eof_reached)
|
|
return AVERROR(EIO);
|
|
size[0] = 4096;
|
|
}
|
|
|
|
res = av_new_packet(pkt, size[0] + size[1] + size[2]);
|
|
if (res < 0)
|
|
return res;
|
|
pkt->stream_index = 0;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
pkt->size = 0;
|
|
for (i = 0; i < 3; i++) {
|
|
if (f[i]) {
|
|
ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
|
|
if (!s->is_pipe)
|
|
avio_close(f[i]);
|
|
if (ret[i] > 0)
|
|
pkt->size += ret[i];
|
|
}
|
|
}
|
|
|
|
if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
|
|
av_free_packet(pkt);
|
|
return AVERROR(EIO); /* signal EOF */
|
|
} else {
|
|
s->img_count++;
|
|
s->img_number++;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(VideoDemuxData, x)
|
|
#define DEC AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
|
|
{ "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
|
|
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "25" }, 0, 0, DEC },
|
|
{ "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC },
|
|
{ "start_number", "first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, DEC },
|
|
{ NULL },
|
|
};
|
|
|
|
#if CONFIG_IMAGE2_DEMUXER
|
|
static const AVClass img2_class = {
|
|
.class_name = "image2 demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
AVInputFormat ff_image2_demuxer = {
|
|
.name = "image2",
|
|
.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
|
|
.priv_data_size = sizeof(VideoDemuxData),
|
|
.read_probe = img_read_probe,
|
|
.read_header = img_read_header,
|
|
.read_packet = img_read_packet,
|
|
.flags = AVFMT_NOFILE,
|
|
.priv_class = &img2_class,
|
|
};
|
|
#endif
|
|
#if CONFIG_IMAGE2PIPE_DEMUXER
|
|
static const AVClass img2pipe_class = {
|
|
.class_name = "image2pipe demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
AVInputFormat ff_image2pipe_demuxer = {
|
|
.name = "image2pipe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
|
|
.priv_data_size = sizeof(VideoDemuxData),
|
|
.read_header = img_read_header,
|
|
.read_packet = img_read_packet,
|
|
.priv_class = &img2pipe_class,
|
|
};
|
|
#endif
|