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anim_dump: small tool to dump frames from animated WebP

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dumps frames to PNG, PAM or TIFF files.


Change-Id: I86a4d7e235cb7040cf5bbcae28270cb5a84be087
This commit is contained in:
Pascal Massimino 2017-08-28 16:03:40 +02:00
parent 6eba857b75
commit f66f94ef36
4 changed files with 136 additions and 2 deletions
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9
Makefile.vc
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@ -155,6 +155,7 @@ CFGSET = TRUE
!MESSAGE - all - build (de)mux-based targets for CFG
!MESSAGE - gif2webp - requires libgif & >= VS2013
!MESSAGE - anim_diff - requires libgif & >= VS2013
!MESSAGE - anim_dump
!MESSAGE
!MESSAGE RTLIBCFG controls the runtime library linkage - 'static' or 'dynamic'.
!MESSAGE 'legacy' will produce a Windows 2000 compatible library.
@ -355,10 +356,15 @@ all: ex $(EXTRA_EXAMPLES)
# C99 support which is only available from VS2013 onward.
gif2webp: $(DIRBIN)\gif2webp.exe
anim_diff: $(DIRBIN)\anim_diff.exe
anim_dump: $(DIRBIN)\anim_dump.exe
$(DIRBIN)\anim_diff.exe: $(DIROBJ)\examples\anim_diff.obj $(EX_ANIM_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
$(DIRBIN)\anim_dump.exe: $(DIROBJ)\examples\anim_dump.obj $(EX_ANIM_UTIL_OBJS)
$(DIRBIN)\anim_dump.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\anim_dump.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
$(DIRBIN)\anim_dump.exe: $(IMAGEIO_ENC_OBJS)
$(DIRBIN)\cwebp.exe: $(DIROBJ)\examples\cwebp.obj $(IMAGEIO_DEC_OBJS)
$(DIRBIN)\cwebp.exe: $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\dwebp.exe: $(DIROBJ)\examples\dwebp.obj $(IMAGEIO_DEC_OBJS)
@ -453,6 +459,9 @@ $(DIROBJ)\dsp\enc_avx2.obj: src\dsp\enc_avx2.c
$(DIROBJ)\examples\anim_diff.obj: examples\anim_diff.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).c
$(DIROBJ)\examples\anim_dump.obj: examples\anim_dump.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).c
$(DIROBJ)\examples\anim_util.obj: examples\anim_util.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).c

14
examples/Makefile.am
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@ -2,7 +2,7 @@ AM_CPPFLAGS += -I$(top_builddir)/src -I$(top_srcdir)/src
bin_PROGRAMS = dwebp cwebp
if BUILD_ANIMDIFF
noinst_PROGRAMS = anim_diff
noinst_PROGRAMS = anim_diff anim_dump
endif
if BUILD_GIF2WEBP
bin_PROGRAMS += gif2webp
@ -33,6 +33,16 @@ anim_diff_LDADD += libexample_util.la
anim_diff_LDADD += ../imageio/libimageio_util.la
anim_diff_LDADD += $(GIF_LIBS) -lm
anim_dump_SOURCES = anim_dump.c anim_util.c anim_util.h
anim_dump_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE) $(PNG_INCLUDES)
anim_dump_CPPFLAGS += $(GIF_INCLUDES)
anim_dump_LDADD =
anim_dump_LDADD += ../src/demux/libwebpdemux.la
anim_dump_LDADD += libexample_util.la
anim_dump_LDADD += ../imageio/libimageio_util.la
anim_dump_LDADD += ../imageio/libimageenc.la
anim_dump_LDADD += $(PNG_LIBS) $(GIF_LIBS) $(TIFF_LIBS) -lm
cwebp_SOURCES = cwebp.c stopwatch.h
cwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
cwebp_LDADD =
@ -97,8 +107,10 @@ webpinfo_LDADD += ../src/libwebp.la
if BUILD_LIBWEBPDECODER
anim_diff_LDADD += ../src/libwebpdecoder.la
anim_dump_LDADD += ../src/libwebpdecoder.la
vwebp_LDADD += ../src/libwebpdecoder.la
else
anim_diff_LDADD += ../src/libwebp.la
anim_dump_LDADD += ../src/libwebp.la
vwebp_LDADD += ../src/libwebp.la
endif

104
examples/anim_dump.c Normal file
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@ -0,0 +1,104 @@
// Copyright 2017 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Decodes an animated WebP file and dumps the decoded frames as PNG or TIFF.
//
// Author: Skal (pascal.massimino@gmail.com)
#include <stdio.h>
#include <string.h> // for 'strcmp'.
#include "./anim_util.h"
#include "webp/decode.h"
#include "../imageio/image_enc.h"
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif
static void Help(void) {
printf("Usage: anim_dump [options] files...\n");
printf("\nOptions:\n");
printf(" -folder <string> .... dump folder (default: '.')\n");
printf(" -prefix <string> .... prefix for dumped frames "
"(default: 'dump_')\n");
printf(" -tiff ............... save frames as TIFF\n");
printf(" -pam ................ save frames as PAM\n");
}
int main(int argc, const char* argv[]) {
int error = 0;
const char* dump_folder = ".";
const char* prefix = "dump_";
const char* suffix = "png";
WebPOutputFileFormat format = PNG;
int c;
if (argc < 2) {
Help();
return -1;
}
for (c = 1; !error && c < argc; ++c) {
if (!strcmp(argv[c], "-folder")) {
if (c + 1 == argc) {
fprintf(stderr, "missing argument after option '%s'\n", argv[c]);
error = 1;
break;
}
dump_folder = argv[++c];
} else if (!strcmp(argv[c], "-prefix")) {
if (c + 1 == argc) {
fprintf(stderr, "missing argument after option '%s'\n", argv[c]);
error = 1;
break;
}
prefix = argv[++c];
} else if (!strcmp(argv[c], "-tiff")) {
format = TIFF;
suffix = "tiff";
} else if (!strcmp(argv[c], "-pam")) {
format = PAM;
suffix = "pam";
} else {
uint32_t i;
AnimatedImage image;
const char* const file = argv[c];
memset(&image, 0, sizeof(image));
printf("Decoding file: %s as %s/%sxxxx.%s\n",
file, dump_folder, prefix, suffix);
if (!ReadAnimatedImage(file, &image, 0, NULL)) {
fprintf(stderr, "Error decoding file: %s\n Aborting.\n", file);
error = 1;
break;
}
for (i = 0; !error && i < image.num_frames; ++i) {
char out_file[1024];
WebPDecBuffer buffer;
WebPInitDecBuffer(&buffer);
buffer.colorspace = MODE_RGBA;
buffer.is_external_memory = 1;
buffer.width = image.canvas_width;
buffer.height = image.canvas_height;
buffer.u.RGBA.rgba = image.frames[i].rgba;
buffer.u.RGBA.stride = buffer.width * sizeof(uint32_t);
buffer.u.RGBA.size = buffer.u.RGBA.stride * buffer.height;
snprintf(out_file, sizeof(out_file), "%s/%s%.4d.%s",
dump_folder, prefix, i, suffix);
if (!WebPSaveImage(&buffer, format, out_file)) {
fprintf(stderr, "Error while saving image '%s'\n", out_file);
error = 1;
}
WebPFreeDecBuffer(&buffer);
}
ClearAnimatedImage(&image);
}
}
return error ? 1 : 0;
}

11
makefile.unix
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@ -332,7 +332,8 @@ OUT_LIBS += src/libwebp.a
EXTRA_LIB = extras/libwebpextras.a
OUT_EXAMPLES = examples/cwebp examples/dwebp
EXTRA_EXAMPLES = examples/gif2webp examples/vwebp examples/webpmux \
examples/anim_diff examples/img2webp examples/webpinfo
examples/anim_diff examples/anim_dump \
examples/img2webp examples/webpinfo
OTHER_EXAMPLES = extras/get_disto extras/webp_quality extras/vwebp_sdl
OUTPUT = $(OUT_LIBS) $(OUT_EXAMPLES)
@ -378,6 +379,7 @@ src/demux/libwebpdemux.a: $(LIBWEBPDEMUX_OBJS)
$(AR) $(ARFLAGS) $@ $^
examples/anim_diff: examples/anim_diff.o $(ANIM_UTIL_OBJS) $(GIFDEC_OBJS)
examples/anim_dump: examples/anim_dump.o $(ANIM_UTIL_OBJS)
examples/cwebp: examples/cwebp.o
examples/dwebp: examples/dwebp.o
examples/gif2webp: examples/gif2webp.o $(GIFDEC_OBJS)
@ -391,6 +393,13 @@ examples/anim_diff: src/demux/libwebpdemux.a examples/libexample_util.a
examples/anim_diff: imageio/libimageio_util.a src/libwebp.a
examples/anim_diff: EXTRA_LIBS += $(GIF_LIBS)
examples/anim_diff: EXTRA_FLAGS += -DWEBP_HAVE_GIF
examples/anim_dump: examples/libanim_util.a
examples/anim_dump: src/demux/libwebpdemux.a
examples/anim_dump: examples/libexample_util.a
examples/anim_dump: imageio/libimageio_util.a
examples/anim_dump: imageio/libimageenc.a
examples/anim_dump: src/libwebp.a
examples/anim_dump: EXTRA_LIBS += $(GIF_LIBS) $(DWEBP_LIBS)
examples/cwebp: examples/libexample_util.a
examples/cwebp: imageio/libimagedec.a
examples/cwebp: imageio/libimageio_util.a