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FFmpeg/libavformat/img2dec.c

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/*
* Image format
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
* Copyright (c) 2004 Michael Niedermayer
*
* 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
*/
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#include <sys/stat.h>
#include "libavutil/avstring.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "libavutil/intreadwrite.h"
#include "libavcodec/gif.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "img2.h"
#include "libavcodec/mjpeg.h"
#include "libavcodec/xwd.h"
#include "subtitles.h"
#if HAVE_GLOB
/* Locally define as 0 (bitwise-OR no-op) any missing glob options that
are non-posix glibc/bsd extensions. */
#ifndef GLOB_NOMAGIC
#define GLOB_NOMAGIC 0
#endif
#ifndef GLOB_BRACE
#define GLOB_BRACE 0
#endif
#endif /* HAVE_GLOB */
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;
}
static int is_glob(const char *path)
{
#if HAVE_GLOB
size_t span = 0;
const char *p = path;
while (p = strchr(p, '%')) {
if (*(++p) == '%') {
++p;
continue;
}
if (span = strspn(p, "*?[]{}"))
break;
}
/* Did we hit a glob char or get to the end? */
return span != 0;
#else
return 0;
#endif
}
/**
* Get index range of image files matched by path.
*
* @param pfirst_index pointer to index updated with the first number in the range
* @param plast_index pointer to index updated with the last number in the range
* @param path path which has to be matched by the image files in the range
* @param start_index minimum accepted value for the first index in the range
* @return -1 if no image file could be found
*/
static int find_image_range(AVIOContext *pb, int *pfirst_index, int *plast_index,
const char *path, int start_index, int start_index_range)
{
char buf[1024];
int range, last_index, range1, first_index;
/* find the first image */
for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
*pfirst_index =
*plast_index = 1;
if (pb || avio_check(buf, AVIO_FLAG_READ) > 0)
return 0;
return -1;
}
if (avio_check(buf, AVIO_FLAG_READ) > 0)
break;
}
if (first_index == start_index + start_index_range)
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 if (is_glob(p->filename))
return AVPROBE_SCORE_MAX;
else if (p->filename[strcspn(p->filename, "*?{")]) // probably PT_GLOB
return AVPROBE_SCORE_EXTENSION + 2; // score chosen to be a tad above the image pipes
else if (p->buf_size == 0)
return 0;
else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
return 5;
else
return AVPROBE_SCORE_EXTENSION;
}
return 0;
}
int ff_img_read_header(AVFormatContext *s1)
{
VideoDemuxData *s = s1->priv_data;
int first_index = 1, last_index = 1;
AVStream *st;
enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
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);
}
av_strlcpy(s->path, s1->url, 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;
}
if (s->ts_from_file == 2) {
#if !HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
av_log(s1, AV_LOG_ERROR, "POSIX.1-2008 not supported, nanosecond file timestamps unavailable\n");
return AVERROR(ENOSYS);
#endif
avpriv_set_pts_info(st, 64, 1, 1000000000);
} else if (s->ts_from_file)
avpriv_set_pts_info(st, 64, 1, 1);
else
avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
if (s->width && s->height) {
st->codecpar->width = s->width;
st->codecpar->height = s->height;
}
if (!s->is_pipe) {
if (s->pattern_type == PT_DEFAULT) {
if (s1->pb) {
s->pattern_type = PT_NONE;
} else
s->pattern_type = PT_GLOB_SEQUENCE;
}
if (s->pattern_type == PT_GLOB_SEQUENCE) {
s->use_glob = is_glob(s->path);
if (s->use_glob) {
#if HAVE_GLOB
char *p = s->path, *q, *dup;
int gerr;
#endif
av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
"use pattern_type 'glob' instead\n");
#if HAVE_GLOB
dup = q = av_strdup(p);
while (*q) {
/* Do we have room for the next char and a \ insertion? */
if ((p - s->path) >= (sizeof(s->path) - 2))
break;
if (*q == '%' && strspn(q + 1, "%*?[]{}"))
++q;
else if (strspn(q, "\\*?[]{}"))
*p++ = '\\';
*p++ = *q++;
}
*p = 0;
av_free(dup);
gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
if (gerr != 0) {
return AVERROR(ENOENT);
}
first_index = 0;
last_index = s->globstate.gl_pathc - 1;
#endif
}
}
if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
if (find_image_range(s1->pb, &first_index, &last_index, s->path,
s->start_number, s->start_number_range) < 0) {
av_log(s1, AV_LOG_ERROR,
"Could find no file with path '%s' and index in the range %d-%d\n",
s->path, s->start_number, s->start_number + s->start_number_range - 1);
return AVERROR(ENOENT);
}
} else if (s->pattern_type == PT_GLOB) {
#if HAVE_GLOB
int gerr;
gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
if (gerr != 0) {
return AVERROR(ENOENT);
}
first_index = 0;
last_index = s->globstate.gl_pathc - 1;
s->use_glob = 1;
#else
av_log(s1, AV_LOG_ERROR,
"Pattern type 'glob' was selected but globbing "
"is not supported by this libavformat build\n");
return AVERROR(ENOSYS);
#endif
} else if (s->pattern_type != PT_GLOB_SEQUENCE && s->pattern_type != PT_NONE) {
av_log(s1, AV_LOG_ERROR,
"Unknown value '%d' for pattern_type option\n", s->pattern_type);
return AVERROR(EINVAL);
}
s->img_first = first_index;
s->img_last = last_index;
s->img_number = first_index;
/* compute duration */
if (!s->ts_from_file) {
st->start_time = 0;
st->duration = last_index - first_index + 1;
}
}
if (s1->video_codec_id) {
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = s1->video_codec_id;
} else if (s1->audio_codec_id) {
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = s1->audio_codec_id;
} else if (s1->iformat->raw_codec_id) {
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = s1->iformat->raw_codec_id;
} else {
const char *str = strrchr(s->path, '.');
s->split_planes = str && !av_strcasecmp(str + 1, "y");
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
if (s1->pb) {
int probe_buffer_size = 2048;
uint8_t *probe_buffer = av_realloc(NULL, probe_buffer_size + AVPROBE_PADDING_SIZE);
const AVInputFormat *fmt = NULL;
void *fmt_iter = NULL;
AVProbeData pd = { 0 };
if (!probe_buffer)
return AVERROR(ENOMEM);
probe_buffer_size = avio_read(s1->pb, probe_buffer, probe_buffer_size);
if (probe_buffer_size < 0) {
av_free(probe_buffer);
return probe_buffer_size;
}
memset(probe_buffer + probe_buffer_size, 0, AVPROBE_PADDING_SIZE);
pd.buf = probe_buffer;
pd.buf_size = probe_buffer_size;
pd.filename = s1->url;
while ((fmt = av_demuxer_iterate(&fmt_iter))) {
if (fmt->read_header != ff_img_read_header ||
!fmt->read_probe ||
(fmt->flags & AVFMT_NOFILE) ||
!fmt->raw_codec_id)
continue;
if (fmt->read_probe(&pd) > 0) {
st->codecpar->codec_id = fmt->raw_codec_id;
break;
}
}
if (s1->flags & AVFMT_FLAG_CUSTOM_IO) {
avio_seek(s1->pb, 0, SEEK_SET);
} else
ffio_rewind_with_probe_data(s1->pb, &probe_buffer, probe_buffer_size);
}
if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
st->codecpar->codec_id = ff_guess_image2_codec(s->path);
if (st->codecpar->codec_id == AV_CODEC_ID_LJPEG)
st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
if (st->codecpar->codec_id == AV_CODEC_ID_ALIAS_PIX) // we cannot distingiush this from BRENDER_PIX
st->codecpar->codec_id = AV_CODEC_ID_NONE;
}
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
pix_fmt != AV_PIX_FMT_NONE)
st->codecpar->format = pix_fmt;
return 0;
}
int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
VideoDemuxData *s = s1->priv_data;
char filename_bytes[1024];
char *filename = filename_bytes;
int i, res;
int size[3] = { 0 }, ret[3] = { 0 };
AVIOContext *f[3] = { NULL };
AVCodecParameters *par = s1->streams[0]->codecpar;
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 (s->pattern_type == PT_NONE) {
av_strlcpy(filename_bytes, s->path, sizeof(filename_bytes));
} else if (s->use_glob) {
#if HAVE_GLOB
filename = s->globstate.gl_pathv[s->img_number];
#endif
} else {
if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
s->path,
s->img_number) < 0 && s->img_number > 1)
return AVERROR(EIO);
}
for (i = 0; i < 3; i++) {
if (s1->pb &&
!strcmp(filename_bytes, s->path) &&
!s->loop &&
!s->split_planes) {
f[i] = s1->pb;
} else if (s1->io_open(s1, &f[i], filename, AVIO_FLAG_READ, 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 (!s->split_planes)
break;
filename[strlen(filename) - 1] = 'U' + i;
}
if (par->codec_id == AV_CODEC_ID_NONE) {
AVProbeData pd = { 0 };
AVInputFormat *ifmt;
uint8_t header[PROBE_BUF_MIN + AVPROBE_PADDING_SIZE];
int ret;
int score = 0;
ret = avio_read(f[0], header, PROBE_BUF_MIN);
if (ret < 0)
return ret;
memset(header + ret, 0, sizeof(header) - ret);
avio_skip(f[0], -ret);
pd.buf = header;
pd.buf_size = ret;
pd.filename = filename;
ifmt = av_probe_input_format3(&pd, 1, &score);
if (ifmt && ifmt->read_packet == ff_img_read_packet && ifmt->raw_codec_id)
par->codec_id = ifmt->raw_codec_id;
}
if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->width)
infer_size(&par->width, &par->height, size[0]);
} else {
f[0] = s1->pb;
if (avio_feof(f[0]) && s->loop && s->is_pipe)
avio_seek(f[0], 0, SEEK_SET);
if (avio_feof(f[0]))
return AVERROR_EOF;
if (s->frame_size > 0) {
size[0] = s->frame_size;
} else if (!s1->streams[0]->parser) {
size[0] = avio_size(s1->pb);
} else {
size[0] = 4096;
}
}
res = av_new_packet(pkt, size[0] + size[1] + size[2]);
if (res < 0) {
goto fail;
}
pkt->stream_index = 0;
pkt->flags |= AV_PKT_FLAG_KEY;
if (s->ts_from_file) {
struct stat img_stat;
if (stat(filename, &img_stat)) {
res = AVERROR(EIO);
goto fail;
}
pkt->pts = (int64_t)img_stat.st_mtime;
#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
if (s->ts_from_file == 2)
pkt->pts = 1000000000*pkt->pts + img_stat.st_mtim.tv_nsec;
#endif
av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
} else if (!s->is_pipe) {
pkt->pts = s->pts;
}
if (s->is_pipe)
pkt->pos = avio_tell(f[0]);
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->loop && s->is_pipe && ret[i] == AVERROR_EOF) {
if (avio_seek(f[i], 0, SEEK_SET) >= 0) {
pkt->pos = 0;
ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
}
}
if (!s->is_pipe && f[i] != s1->pb)
ff_format_io_close(s1, &f[i]);
if (ret[i] > 0)
pkt->size += ret[i];
}
}
if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
av_packet_unref(pkt);
if (ret[0] < 0) {
res = ret[0];
} else if (ret[1] < 0) {
res = ret[1];
} else if (ret[2] < 0) {
res = ret[2];
} else {
res = AVERROR_EOF;
}
goto fail;
} else {
s->img_count++;
s->img_number++;
s->pts++;
return 0;
}
fail:
if (!s->is_pipe) {
for (i = 0; i < 3; i++) {
if (f[i] != s1->pb)
ff_format_io_close(s1, &f[i]);
}
}
return res;
}
static int img_read_close(struct AVFormatContext* s1)
{
#if HAVE_GLOB
VideoDemuxData *s = s1->priv_data;
if (s->use_glob) {
globfree(&s->globstate);
}
#endif
return 0;
}
static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{
VideoDemuxData *s1 = s->priv_data;
AVStream *st = s->streams[0];
if (s1->ts_from_file) {
int index = av_index_search_timestamp(st, timestamp, flags);
if(index < 0)
return -1;
s1->img_number = st->index_entries[index].pos;
return 0;
}
if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
return -1;
s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
s1->pts = timestamp;
return 0;
}
#define OFFSET(x) offsetof(VideoDemuxData, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
const AVOption ff_img_options[] = {
{ "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
{ "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, DEC },
{ "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_DEFAULT}, 0, INT_MAX, DEC, "pattern_type"},
{ "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
{ "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
{ "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
{ "none", "disable pattern matching", 0, AV_OPT_TYPE_CONST, {.i64=PT_NONE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
{ "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, DEC },
{ "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
{ "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
{ "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
{ "ts_from_file", "set frame timestamp from file's one", OFFSET(ts_from_file), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
{ "none", "none", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
{ "sec", "second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 2, DEC, "ts_type" },
{ "ns", "nano second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 2, DEC, "ts_type" },
{ NULL },
};
#if CONFIG_IMAGE2_DEMUXER
static const AVClass img2_class = {
.class_name = "image2 demuxer",
.item_name = av_default_item_name,
.option = ff_img_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 = ff_img_read_header,
.read_packet = ff_img_read_packet,
.read_close = img_read_close,
.read_seek = img_read_seek,
.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 = ff_img_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 = ff_img_read_header,
.read_packet = ff_img_read_packet,
.priv_class = &img2pipe_class,
};
#endif
static int bmp_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
int ihsize;
if (AV_RB16(b) != 0x424d)
return 0;
ihsize = AV_RL32(b+14);
if (ihsize < 12 || ihsize > 255)
return 0;
if (!AV_RN32(b + 6)) {
return AVPROBE_SCORE_EXTENSION + 1;
}
return AVPROBE_SCORE_EXTENSION / 4;
}
static int dds_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if ( AV_RB64(b) == 0x444453207c000000
&& AV_RL32(b + 8)
&& AV_RL32(b + 12))
return AVPROBE_SCORE_MAX - 1;
return 0;
}
static int dpx_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
int w, h;
int is_big = (AV_RN32(b) == AV_RN32("SDPX"));
if (p->buf_size < 0x304+8)
return 0;
w = is_big ? AV_RB32(p->buf + 0x304) : AV_RL32(p->buf + 0x304);
h = is_big ? AV_RB32(p->buf + 0x308) : AV_RL32(p->buf + 0x308);
if (w <= 0 || h <= 0)
return 0;
if (is_big || AV_RN32(b) == AV_RN32("XPDS"))
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int exr_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RL32(b) == 20000630)
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int j2k_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB64(b) == 0x0000000c6a502020 ||
AV_RB32(b) == 0xff4fff51)
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int jpeg_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
int i, state = SOI;
if (AV_RB16(b) != 0xFFD8 ||
AV_RB32(b) == 0xFFD8FFF7)
return 0;
b += 2;
for (i = 0; i < p->buf_size - 3; i++) {
int c;
if (b[i] != 0xFF)
continue;
c = b[i + 1];
switch (c) {
case SOI:
return 0;
case SOF0:
case SOF1:
case SOF2:
case SOF3:
case SOF5:
case SOF6:
case SOF7:
i += AV_RB16(&b[i + 2]) + 1;
if (state != SOI)
return 0;
state = SOF0;
break;
case SOS:
i += AV_RB16(&b[i + 2]) + 1;
if (state != SOF0 && state != SOS)
return 0;
state = SOS;
break;
case EOI:
if (state != SOS)
return 0;
state = EOI;
break;
case DQT:
case APP0:
case APP1:
case APP2:
case APP3:
case APP4:
case APP5:
case APP6:
case APP7:
case APP8:
case APP9:
case APP10:
case APP11:
case APP12:
case APP13:
case APP14:
case APP15:
case COM:
i += AV_RB16(&b[i + 2]) + 1;
break;
default:
if ( (c > TEM && c < SOF0)
|| c == JPG)
return 0;
}
}
if (state == EOI)
return AVPROBE_SCORE_EXTENSION + 1;
if (state == SOS)
return AVPROBE_SCORE_EXTENSION / 2;
return AVPROBE_SCORE_EXTENSION / 8;
}
static int jpegls_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB32(b) == 0xffd8fff7)
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int pcx_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if ( p->buf_size < 128
|| b[0] != 10
|| b[1] > 5
|| b[2] > 1
|| av_popcount(b[3]) != 1 || b[3] > 8
|| AV_RL16(&b[4]) > AV_RL16(&b[8])
|| AV_RL16(&b[6]) > AV_RL16(&b[10])
|| b[64])
return 0;
b += 73;
while (++b < p->buf + 128)
if (*b)
return AVPROBE_SCORE_EXTENSION / 4;
return AVPROBE_SCORE_EXTENSION + 1;
}
static int qdraw_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if ( p->buf_size >= 528
&& (AV_RB64(b + 520) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
&& AV_RB16(b + 520)
&& AV_RB16(b + 518))
return AVPROBE_SCORE_MAX * 3 / 4;
if ( (AV_RB64(b + 8) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
&& AV_RB16(b + 8)
&& AV_RB16(b + 6))
return AVPROBE_SCORE_EXTENSION / 4;
return 0;
}
static int pictor_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RL16(b) == 0x1234)
return AVPROBE_SCORE_EXTENSION / 4;
return 0;
}
static int png_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB64(b) == 0x89504e470d0a1a0a)
return AVPROBE_SCORE_MAX - 1;
return 0;
}
static int psd_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
int ret = 0;
uint16_t color_mode;
if (AV_RL32(b) == MKTAG('8','B','P','S')) {
ret += 1;
} else {
return 0;
}
if ((b[4] == 0) && (b[5] == 1)) {/* version 1 is PSD, version 2 is PSB */
ret += 1;
} else {
return 0;
}
if ((AV_RL32(b+6) == 0) && (AV_RL16(b+10) == 0))/* reserved must be 0 */
ret += 1;
color_mode = AV_RB16(b+24);
if ((color_mode <= 9) && (color_mode != 5) && (color_mode != 6))
ret += 1;
return AVPROBE_SCORE_EXTENSION + ret;
}
static int sgi_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB16(b) == 474 &&
(b[2] & ~1) == 0 &&
(b[3] & ~3) == 0 && b[3] &&
(AV_RB16(b + 4) & ~7) == 0 && AV_RB16(b + 4))
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int sunrast_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB32(b) == 0x59a66a95)
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int svg_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
const uint8_t *end = p->buf + p->buf_size;
if (memcmp(p->buf, "<?xml", 5))
return 0;
while (b < end) {
int inc = ff_subtitles_next_line(b);
if (!inc)
break;
b += inc;
if (b >= end - 4)
return 0;
if (!memcmp(b, "<svg", 4))
return AVPROBE_SCORE_EXTENSION + 1;
}
return 0;
}
static int tiff_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB32(b) == 0x49492a00 ||
AV_RB32(b) == 0x4D4D002a)
return AVPROBE_SCORE_EXTENSION + 1;
return 0;
}
static int webp_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB32(b) == 0x52494646 &&
AV_RB32(b + 8) == 0x57454250)
return AVPROBE_SCORE_MAX - 1;
return 0;
}
static int pnm_magic_check(const AVProbeData *p, int magic)
{
const uint8_t *b = p->buf;
return b[0] == 'P' && b[1] == magic + '0';
}
static inline int pnm_probe(const AVProbeData *p)
{
const uint8_t *b = p->buf;
while (b[2] == '\r')
b++;
if (b[2] == '\n' && (b[3] == '#' || (b[3] >= '0' && b[3] <= '9')))
return AVPROBE_SCORE_EXTENSION + 2;
return 0;
}
static int pbm_probe(AVProbeData *p)
{
return pnm_magic_check(p, 1) || pnm_magic_check(p, 4) ? pnm_probe(p) : 0;
}
static inline int pgmx_probe(AVProbeData *p)
{
return pnm_magic_check(p, 2) || pnm_magic_check(p, 5) ? pnm_probe(p) : 0;
}
static int pgm_probe(AVProbeData *p)
{
int ret = pgmx_probe(p);
return ret && !av_match_ext(p->filename, "pgmyuv") ? ret : 0;
}
static int pgmyuv_probe(AVProbeData *p) // custom FFmpeg format recognized by file extension
{
int ret = pgmx_probe(p);
return ret && av_match_ext(p->filename, "pgmyuv") ? ret : 0;
}
static int ppm_probe(AVProbeData *p)
{
return pnm_magic_check(p, 3) || pnm_magic_check(p, 6) ? pnm_probe(p) : 0;
}
static int pam_probe(AVProbeData *p)
{
return pnm_magic_check(p, 7) ? pnm_probe(p) : 0;
}
static int xpm_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (AV_RB64(b) == 0x2f2a2058504d202a && *(b+8) == '/')
return AVPROBE_SCORE_MAX - 1;
return 0;
}
static int xwd_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
unsigned width, bpp, bpad, lsize;
if ( p->buf_size < XWD_HEADER_SIZE
|| AV_RB32(b ) < XWD_HEADER_SIZE // header size
|| AV_RB32(b + 4) != XWD_VERSION // version
|| AV_RB32(b + 8) != XWD_Z_PIXMAP // format
|| AV_RB32(b + 12) > 32 || !AV_RB32(b + 12) // depth
|| AV_RB32(b + 16) == 0 // width
|| AV_RB32(b + 20) == 0 // height
|| AV_RB32(b + 28) > 1 // byteorder
|| AV_RB32(b + 32) & ~56 || av_popcount(AV_RB32(b + 32)) != 1 // bitmap unit
|| AV_RB32(b + 36) > 1 // bitorder
|| AV_RB32(b + 40) & ~56 || av_popcount(AV_RB32(b + 40)) != 1 // padding
|| AV_RB32(b + 44) > 32 || !AV_RB32(b + 44) // bpp
|| AV_RB32(b + 68) > 256) // colours
return 0;
width = AV_RB32(b + 16);
bpad = AV_RB32(b + 40);
bpp = AV_RB32(b + 44);
lsize = AV_RB32(b + 48);
if (lsize < FFALIGN(width * bpp, bpad) >> 3)
return 0;
return AVPROBE_SCORE_MAX / 2 + 1;
}
static int gif_probe(AVProbeData *p)
{
/* check magick */
if (memcmp(p->buf, gif87a_sig, 6) && memcmp(p->buf, gif89a_sig, 6))
return 0;
/* width or height contains zero? */
if (!AV_RL16(&p->buf[6]) || !AV_RL16(&p->buf[8]))
return 0;
return AVPROBE_SCORE_MAX - 1;
}
#define IMAGEAUTO_DEMUXER(imgname, codecid)\
static const AVClass imgname ## _class = {\
.class_name = AV_STRINGIFY(imgname) " demuxer",\
.item_name = av_default_item_name,\
.option = ff_img_options,\
.version = LIBAVUTIL_VERSION_INT,\
};\
AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
.name = AV_STRINGIFY(imgname) "_pipe",\
.long_name = NULL_IF_CONFIG_SMALL("piped " AV_STRINGIFY(imgname) " sequence"),\
.priv_data_size = sizeof(VideoDemuxData),\
.read_probe = imgname ## _probe,\
.read_header = ff_img_read_header,\
.read_packet = ff_img_read_packet,\
.priv_class = & imgname ## _class,\
.flags = AVFMT_GENERIC_INDEX, \
.raw_codec_id = codecid,\
};
IMAGEAUTO_DEMUXER(bmp, AV_CODEC_ID_BMP)
IMAGEAUTO_DEMUXER(dds, AV_CODEC_ID_DDS)
IMAGEAUTO_DEMUXER(dpx, AV_CODEC_ID_DPX)
IMAGEAUTO_DEMUXER(exr, AV_CODEC_ID_EXR)
IMAGEAUTO_DEMUXER(gif, AV_CODEC_ID_GIF)
IMAGEAUTO_DEMUXER(j2k, AV_CODEC_ID_JPEG2000)
IMAGEAUTO_DEMUXER(jpeg, AV_CODEC_ID_MJPEG)
IMAGEAUTO_DEMUXER(jpegls, AV_CODEC_ID_JPEGLS)
IMAGEAUTO_DEMUXER(pam, AV_CODEC_ID_PAM)
IMAGEAUTO_DEMUXER(pbm, AV_CODEC_ID_PBM)
IMAGEAUTO_DEMUXER(pcx, AV_CODEC_ID_PCX)
IMAGEAUTO_DEMUXER(pgm, AV_CODEC_ID_PGM)
IMAGEAUTO_DEMUXER(pgmyuv, AV_CODEC_ID_PGMYUV)
IMAGEAUTO_DEMUXER(pictor, AV_CODEC_ID_PICTOR)
IMAGEAUTO_DEMUXER(png, AV_CODEC_ID_PNG)
IMAGEAUTO_DEMUXER(ppm, AV_CODEC_ID_PPM)
IMAGEAUTO_DEMUXER(psd, AV_CODEC_ID_PSD)
IMAGEAUTO_DEMUXER(qdraw, AV_CODEC_ID_QDRAW)
IMAGEAUTO_DEMUXER(sgi, AV_CODEC_ID_SGI)
IMAGEAUTO_DEMUXER(sunrast, AV_CODEC_ID_SUNRAST)
IMAGEAUTO_DEMUXER(svg, AV_CODEC_ID_SVG)
IMAGEAUTO_DEMUXER(tiff, AV_CODEC_ID_TIFF)
IMAGEAUTO_DEMUXER(webp, AV_CODEC_ID_WEBP)
IMAGEAUTO_DEMUXER(xpm, AV_CODEC_ID_XPM)
IMAGEAUTO_DEMUXER(xwd, AV_CODEC_ID_XWD)