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lavf/img2dec: Auto-detect xwd images.

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This commit is contained in:
Carl Eugen Hoyos 2018-05-25 20:06:34 +02:00
parent 7c333dc6a7
commit 42b4351333
4 changed files with 35 additions and 1 deletions
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1
libavformat/Makefile
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@ -258,6 +258,7 @@ OBJS-$(CONFIG_IMAGE_SUNRAST_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_TIFF_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_WEBP_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_XPM_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_XWD_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_INGENIENT_DEMUXER) += ingenientdec.o rawdec.o
OBJS-$(CONFIG_IPMOVIE_DEMUXER) += ipmovie.o
OBJS-$(CONFIG_IRCAM_DEMUXER) += ircamdec.o ircam.o pcm.o

1
libavformat/allformats.c
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@ -476,6 +476,7 @@ extern AVInputFormat ff_image_sunrast_pipe_demuxer;
extern AVInputFormat ff_image_tiff_pipe_demuxer;
extern AVInputFormat ff_image_webp_pipe_demuxer;
extern AVInputFormat ff_image_xpm_pipe_demuxer;
extern AVInputFormat ff_image_xwd_pipe_demuxer;
/* external libraries */
extern AVOutputFormat ff_chromaprint_muxer;

32
libavformat/img2dec.c
View File

@ -34,6 +34,7 @@
#include "internal.h"
#include "img2.h"
#include "libavcodec/mjpeg.h"
#include "libavcodec/xwd.h"
#include "subtitles.h"
#if HAVE_GLOB
@ -974,6 +975,36 @@ static int xpm_probe(AVProbeData *p)
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;
}
#define IMAGEAUTO_DEMUXER(imgname, codecid)\
static const AVClass imgname ## _class = {\
.class_name = AV_STRINGIFY(imgname) " demuxer",\
@ -1016,3 +1047,4 @@ 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)

2
libavformat/version.h
View File

@ -32,7 +32,7 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 16
#define LIBAVFORMAT_VERSION_MINOR 17
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \