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Merge "migrate anim_diff tool from C++ to C89"

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This commit is contained in:
James Zern 2015-11-10 02:30:53 +00:00 committed by Gerrit Code Review
commit 8550d443f5
7 changed files with 405 additions and 366 deletions
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11
Makefile.vc
View File

@ -325,6 +325,7 @@ gif2webp: $(DIRBIN)\gif2webp.exe
anim_diff: $(DIRBIN)\anim_diff.exe
$(DIRBIN)\anim_diff.exe: $(DIROBJ)\examples\anim_diff.obj $(EX_ANIM_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
$(DIRBIN)\cwebp.exe: $(DIROBJ)\examples\cwebp.obj $(EX_FORMAT_DEC_OBJS)
$(DIRBIN)\dwebp.exe: $(DIROBJ)\examples\dwebp.obj
@ -382,18 +383,18 @@ $(DIROBJ)\$(DLLINC):
@echo #define WEBP_EXTERN(type) __declspec(dllexport) type >> $@
@echo #endif /* WEBP_DLL_H_ */ >> $@
.SUFFIXES: .c .cc .obj .res .exe
.SUFFIXES: .c .obj .res .exe
# File-specific flag builds. Note batch rules take precedence over wildcards,
# so for now name each file individually.
$(DIROBJ)\dsp\enc_avx2.obj: src\dsp\enc_avx2.c
$(CC) $(CFLAGS) $(AVX2_FLAGS) /Fd$(LIBWEBP_PDBNAME) /Fo$(DIROBJ)\dsp\ \
src\dsp\$(@B).c
$(DIROBJ)\examples\anim_diff.obj: examples\anim_diff.cc
$(DIROBJ)\examples\anim_diff.obj: examples\anim_diff.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).cc
$(DIROBJ)\examples\anim_util.obj: examples\anim_util.cc
/Fo$(DIROBJ)\examples\ examples\$(@B).c
$(DIROBJ)\examples\anim_util.obj: examples\anim_util.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).cc
/Fo$(DIROBJ)\examples\ examples\$(@B).c
$(DIROBJ)\examples\gif2webp.obj: examples\gif2webp.c
$(CC) $(CFLAGS) /DWEBP_HAVE_GIF /Fd$(LIBWEBP_PDBNAME) \
/Fo$(DIROBJ)\examples\ examples\$(@B).c

86
configure.ac
View File

@ -11,7 +11,6 @@ m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_LIBTOOL
AM_PROG_CC_C_O
AC_PROG_CXX
dnl === Enable less verbose output when building.
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
@ -37,44 +36,34 @@ AC_ARG_WITH([pkgconfigdir], AS_HELP_STRING([--with-pkgconfigdir=DIR],
[pkgconfigdir="$withval"], [pkgconfigdir='${libdir}/pkgconfig'])
AC_SUBST([pkgconfigdir])
dnl === TEST_AND_ADD_FLAGS(var, compiler, flag)
dnl === Checks whether $CC (or $CXX if compiler is 'CXX') supports 'flag' and
dnl === adds it to 'var' on success.
AC_DEFUN([TEST_AND_ADD_FLAGS],
[AS_IF([test "$2" = "CXX"],
[SAVED_FLAGS="$CXXFLAGS"
CXXFLAGS="-Werror $3"
AC_MSG_CHECKING([whether $CXX supports $3])
AC_LANG_PUSH([C++])],
[SAVED_FLAGS="$CFLAGS"
CFLAGS="-Werror $3"
AC_MSG_CHECKING([whether $CC supports $3])])
dnl === TEST_AND_ADD_CFLAGS(var, flag)
dnl === Checks whether $CC supports 'flag' and adds it to 'var'
dnl === on success.
AC_DEFUN([TEST_AND_ADD_CFLAGS],
[SAVED_CFLAGS="$CFLAGS"
CFLAGS="-Werror $2"
AC_MSG_CHECKING([whether $CC supports $2])
dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])],
[AC_MSG_RESULT([yes])]
dnl Simply append the variable avoiding a
dnl compatibility ifdef for AS_VAR_APPEND as this
dnl variable shouldn't grow all that large.
[$1="${$1} $3"],
[$1="${$1} $2"],
[AC_MSG_RESULT([no])])
AS_IF([test "$2" = "CXX"],
[AC_LANG_POP([C++])
CXXFLAGS="$SAVED_FLAGS"],
[CFLAGS="$SAVED_FLAGS"])])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wall])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wdeclaration-after-statement])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wextra])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wformat-nonliteral])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wformat-security])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wmissing-declarations])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wmissing-prototypes])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wold-style-definition])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wshadow])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wshorten-64-to-32])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wunreachable-code])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wunused-but-set-variable])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wunused])
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-Wvla])
CFLAGS="$SAVED_CFLAGS"])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wall])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wdeclaration-after-statement])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wextra])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat-nonliteral])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat-security])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-declarations])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-prototypes])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wold-style-definition])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshadow])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused-but-set-variable])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wvla])
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62040
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61622
AS_IF([test "$GCC" = "yes" ], [
@ -87,7 +76,7 @@ AS_IF([test "$GCC" = "yes" ], [
esac
esac
AS_IF([test "$gcc_wht_bug" = "yes"], [
TEST_AND_ADD_FLAGS([AM_CFLAGS], [C], [-frename-registers])])])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-frename-registers])])])
AC_SUBST([AM_CFLAGS])
dnl === Check for machine specific flags
@ -98,7 +87,7 @@ AC_ARG_ENABLE([avx2],
AS_IF([test "x$enable_avx2" != "xno" -a "x$enable_sse4_1" != "xno" \
-a "x$enable_sse2" != "xno"], [
TEST_AND_ADD_FLAGS([AVX2_FLAGS], [C], [-mavx2])
TEST_AND_ADD_CFLAGS([AVX2_FLAGS], [-mavx2])
AS_IF([test -n "$AVX2_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $AVX2_FLAGS"
@ -121,7 +110,7 @@ AC_ARG_ENABLE([sse4.1],
@<:@default=auto@:>@]))
AS_IF([test "x$enable_sse4_1" != "xno" -a "x$enable_sse2" != "xno"], [
TEST_AND_ADD_FLAGS([SSE41_FLAGS], [C], [-msse4.1])
TEST_AND_ADD_CFLAGS([SSE41_FLAGS], [-msse4.1])
AS_IF([test -n "$SSE41_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $SSE41_FLAGS"
@ -138,7 +127,7 @@ AC_ARG_ENABLE([sse2],
@<:@default=auto@:>@]))
AS_IF([test "x$enable_sse2" != "xno"], [
TEST_AND_ADD_FLAGS([SSE2_FLAGS], [C], [-msse2])
TEST_AND_ADD_CFLAGS([SSE2_FLAGS], [-msse2])
AS_IF([test -n "$SSE2_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $SSE2_FLAGS"
@ -449,30 +438,7 @@ AS_IF([test "x$enable_gif" != "xno"], [
if test "$gif_support" = "yes" -a \
"$enable_libwebpdemux" = "yes"; then
dnl === Enable C++ compiler for .cc sources, if available.
AC_LANG_PUSH([C++])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <iostream>],
[std::cout << "a";])],
[cxx_support=yes],
[AC_MSG_WARN([C++ compiler absent: compilation of C++ sources disabled.])
cxx_support=no])
AC_LANG_POP([C++])
if test "$cxx_support" = "yes"; then
build_animdiff=yes
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wall])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wextra])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wformat-nonliteral])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wformat-security])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wmissing-declarations])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wshadow])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wshorten-64-to-32])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wunreachable-code])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wunused-but-set-variable])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wunused])
TEST_AND_ADD_FLAGS([AM_CXXFLAGS], [CXX], [-Wvla])
AC_SUBST([AM_CXXFLAGS])
fi
build_animdiff=yes
fi
if test "$gif_support" = "yes" -a \

5
examples/Makefile.am
View File

@ -20,10 +20,11 @@ if BUILD_ANIMDIFF
noinst_PROGRAMS = anim_diff
endif
anim_diff_SOURCES = anim_diff.cc anim_util.cc anim_util.h
anim_diff_SOURCES = anim_diff.c anim_util.c anim_util.h
anim_diff_CPPFLAGS = $(AM_CPPFLAGS) $(GIF_INCLUDES)
anim_diff_LDADD = ../src/demux/libwebpdemux.la
anim_diff_LDADD += $(GIF_LIBS)
anim_diff_LDADD += libexampleutil.la
anim_diff_LDADD += $(GIF_LIBS) -lm
dwebp_SOURCES = dwebp.c stopwatch.h
dwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)

157
examples/anim_diff.cc → examples/anim_diff.c
View File

@ -18,129 +18,136 @@
#include <stdlib.h> // for 'strtod'.
#include <string.h> // for 'strcmp'.
#include <iostream> // for 'cout'.
#include <sstream> // for 'ostringstream'.
#include "./anim_util.h"
namespace {
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif
// Return true if 'a + b' will overflow.
bool AdditionWillOverflow(int a, int b) {
// Returns true if 'a + b' will overflow.
static int AdditionWillOverflow(int a, int b) {
return (b > 0) && (a > INT_MAX - b);
}
// Minimize number of frames by combining successive frames that have exact same
// ARGB data into a single longer duration frame.
void MinimizeAnimationFrames(AnimatedImage* const img) {
for (size_t i = 1; i < img->frames.size(); ++i) {
static void MinimizeAnimationFrames(AnimatedImage* const img) {
uint32_t i;
for (i = 1; i < img->num_frames; ++i) {
DecodedFrame* const frame1 = &img->frames[i - 1];
DecodedFrame* const frame2 = &img->frames[i];
const uint8_t* const rgba1 = frame1->rgba;
const uint8_t* const rgba2 = frame2->rgba;
// If merging frames will result in integer overflow for 'duration',
// skip merging.
if (AdditionWillOverflow(frame1->duration, frame2->duration)) continue;
const uint8_t* rgba1 = frame1->rgba.data();
const uint8_t* rgba2 = frame2->rgba.data();
if (!memcmp(rgba1, rgba2, img->canvas_width * 4 * img->canvas_height)) {
// Merge 'i+1'th frame into 'i'th frame.
frame1->duration += frame2->duration;
img->frames.erase(img->frames.begin() + i);
if (i + 1 < img->num_frames) {
memmove(&img->frames[i], &img->frames[i + 1],
(img->num_frames - i - 1) * sizeof(*img->frames));
}
--img->num_frames;
--i;
}
}
}
template<typename T>
bool CompareValues(T a, T b, const std::string& output_str) {
static int CompareValues(uint32_t a, uint32_t b, const char* output_str) {
if (a != b) {
std::cout << output_str << ": " << a << " vs " << b << std::endl;
return false;
fprintf(stderr, "%s: %d vs %d\n", output_str, a, b);
return 0;
}
return true;
return 1;
}
// Note: As long as frame durations and reconstructed frames are identical, it
// is OK for other aspects like offsets, dispose/blend method to vary.
bool CompareAnimatedImagePair(const AnimatedImage& img1,
const AnimatedImage& img2,
bool premultiply,
double min_psnr) {
bool ok = true;
ok = CompareValues(img1.canvas_width, img2.canvas_width,
"Canvas width mismatch") && ok;
ok = CompareValues(img1.canvas_height, img2.canvas_height,
"Canvas height mismatch") && ok;
ok = CompareValues(img1.frames.size(), img2.frames.size(),
"Frame count mismatch") && ok;
if (!ok) return false; // These are fatal failures, can't proceed.
static int CompareAnimatedImagePair(const AnimatedImage* const img1,
const AnimatedImage* const img2,
int premultiply,
double min_psnr) {
int ok = 1;
const int is_multi_frame_image = (img1->num_frames > 1);
uint32_t i;
ok = CompareValues(img1->canvas_width, img2->canvas_width,
"Canvas width mismatch") && ok;
ok = CompareValues(img1->canvas_height, img2->canvas_height,
"Canvas height mismatch") && ok;
ok = CompareValues(img1->num_frames, img2->num_frames,
"Frame count mismatch") && ok;
if (!ok) return 0; // These are fatal failures, can't proceed.
const bool is_multi_frame_image = (img1.frames.size() > 1);
if (is_multi_frame_image) { // Checks relevant for multi-frame images only.
ok = CompareValues(img1.loop_count, img2.loop_count,
ok = CompareValues(img1->loop_count, img2->loop_count,
"Loop count mismatch") && ok;
ok = CompareValues(img1.bgcolor, img2.bgcolor,
ok = CompareValues(img1->bgcolor, img2->bgcolor,
"Background color mismatch") && ok;
}
for (size_t i = 0; i < img1.frames.size(); ++i) {
if (is_multi_frame_image) { // Check relevant for multi-frame images only.
std::ostringstream error_str;
error_str << "Frame #" << i << ", duration mismatch";
ok = CompareValues(img1.frames[i].duration, img2.frames[i].duration,
error_str.str()) && ok;
}
for (i = 0; i < img1->num_frames; ++i) {
// Pixel-by-pixel comparison.
const uint8_t* rgba1 = img1.frames[i].rgba.data();
const uint8_t* rgba2 = img2.frames[i].rgba.data();
const uint8_t* const rgba1 = img1->frames[i].rgba;
const uint8_t* const rgba2 = img2->frames[i].rgba;
int max_diff;
double psnr;
GetDiffAndPSNR(rgba1, rgba2, img1.canvas_width, img1.canvas_height,
if (is_multi_frame_image) { // Check relevant for multi-frame images only.
const char format[] = "Frame #%d, duration mismatch";
char tmp[sizeof(format) + 8];
ok = ok && (snprintf(tmp, sizeof(tmp), format, i) >= 0);
ok = ok && CompareValues(img1->frames[i].duration,
img2->frames[i].duration, tmp);
}
GetDiffAndPSNR(rgba1, rgba2, img1->canvas_width, img1->canvas_height,
premultiply, &max_diff, &psnr);
if (min_psnr > 0.) {
if (psnr < min_psnr) {
fprintf(stderr, "Frame #%zu, psnr = %.2lf (min_psnr = %f)\n", i,
fprintf(stderr, "Frame #%d, psnr = %.2lf (min_psnr = %f)\n", i,
psnr, min_psnr);
ok = false;
ok = 0;
}
} else {
if (max_diff != 0) {
fprintf(stderr, "Frame #%zu, max pixel diff: %d\n", i, max_diff);
ok = false;
fprintf(stderr, "Frame #%d, max pixel diff: %d\n", i, max_diff);
ok = 0;
}
}
}
return ok;
}
void Help() {
static void Help(void) {
printf("\nUsage: anim_diff <image1> <image2> [-dump_frames <folder>] "
"[-min_psnr <float>][-raw_comparison]\n");
}
} // namespace
int main(int argc, const char* argv[]) {
bool dump_frames = false;
int return_code = -1;
int dump_frames = 0;
const char* dump_folder = NULL;
double min_psnr = 0.;
bool got_input1 = false;
bool got_input2 = false;
bool premultiply = true;
const char* files[2];
int got_input1 = 0;
int got_input2 = 0;
int premultiply = 1;
int i, c;
const char* files[2] = { NULL, NULL };
AnimatedImage images[2];
if (argc < 3) {
Help();
return -1;
}
for (int c = 1; c < argc; ++c) {
bool parse_error = false;
for (c = 1; c < argc; ++c) {
int parse_error = 0;
if (!strcmp(argv[c], "-dump_frames")) {
if (c < argc - 1) {
dump_frames = true;
dump_frames = 1;
dump_folder = argv[++c];
} else {
parse_error = true;
parse_error = 1;
}
} else if (!strcmp(argv[c], "-min_psnr")) {
if (c < argc - 1) {
@ -148,24 +155,24 @@ int main(int argc, const char* argv[]) {
char* end = NULL;
const double d = strtod(v, &end);
if (end == v) {
parse_error = true;
parse_error = 1;
fprintf(stderr, "Error! '%s' is not a floating point number.\n", v);
}
min_psnr = d;
} else {
parse_error = true;
parse_error = 1;
}
} else if (!strcmp(argv[c], "-raw_comparison")) {
premultiply = false;
premultiply = 0;
} else {
if (!got_input1) {
files[0] = argv[c];
got_input1 = true;
got_input1 = 1;
} else if (!got_input2) {
files[1] = argv[c];
got_input2 = true;
got_input2 = 1;
} else {
parse_error = true;
parse_error = 1;
}
}
if (parse_error) {
@ -182,22 +189,28 @@ int main(int argc, const char* argv[]) {
printf("Dumping decoded frames in: %s\n", dump_folder);
}
AnimatedImage images[2];
for (int i = 0; i < 2; ++i) {
memset(images, 0, sizeof(images));
for (i = 0; i < 2; ++i) {
printf("Decoding file: %s\n", files[i]);
if (!ReadAnimatedImage(files[i], &images[i], dump_frames, dump_folder)) {
fprintf(stderr, "Error decoding file: %s\n Aborting.\n", files[i]);
return -2;
return_code = -2;
goto End;
} else {
MinimizeAnimationFrames(&images[i]);
}
MinimizeAnimationFrames(&images[i]);
}
if (!CompareAnimatedImagePair(images[0], images[1],
if (!CompareAnimatedImagePair(&images[0], &images[1],
premultiply, min_psnr)) {
fprintf(stderr, "\nFiles %s and %s differ.\n", files[0], files[1]);
return -3;
return_code = -3;
} else {
printf("\nFiles %s and %s are identical.\n", files[0], files[1]);
return_code = 0;
}
printf("\nFiles %s and %s are identical.\n", files[0], files[1]);
return 0;
End:
ClearAnimatedImage(&images[0]);
ClearAnimatedImage(&images[1]);
return return_code;
}

430
examples/anim_util.cc → examples/anim_util.c
View File

@ -16,20 +16,17 @@
#include <stdio.h>
#include <string.h>
#include <fstream>
#include <sstream> // for 'ostringstream'.
#ifdef WEBP_HAVE_GIF
#include <gif_lib.h>
#endif
#include "webp/format_constants.h"
#include "webp/decode.h"
#include "webp/demux.h"
#include "./example_util.h"
using std::ifstream;
using std::ios;
using std::ofstream;
using std::ostringstream;
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif
static const int kNumChannels = 4;
@ -37,17 +34,43 @@ static const int kNumChannels = 4;
// Common utilities.
// Returns true if the frame covers the full canvas.
static bool IsFullFrame(int width, int height,
int canvas_width, int canvas_height) {
static int IsFullFrame(int width, int height,
int canvas_width, int canvas_height) {
return (width == canvas_width && height == canvas_height);
}
static void AllocateFrames(AnimatedImage* const image, uint32_t frame_count) {
image->frames.resize(frame_count);
for (size_t i = 0; i < image->frames.size(); ++i) {
const size_t rgba_size =
image->canvas_width * kNumChannels * image->canvas_height;
image->frames[i].rgba.resize(rgba_size);
static int AllocateFrames(AnimatedImage* const image, uint32_t num_frames) {
uint32_t i;
const size_t rgba_size =
image->canvas_width * kNumChannels * image->canvas_height;
uint8_t* const mem = (uint8_t*)malloc(num_frames * rgba_size * sizeof(*mem));
DecodedFrame* const frames =
(DecodedFrame*)malloc(num_frames * sizeof(*frames));
if (mem == NULL || frames == NULL) {
free(mem);
free(frames);
return 0;
}
free(image->raw_mem);
image->num_frames = num_frames;
image->frames = frames;
for (i = 0; i < num_frames; ++i) {
frames[i].rgba = mem + i * rgba_size;
frames[i].duration = 0;
frames[i].is_key_frame = 0;
}
image->raw_mem = mem;
return 1;
}
void ClearAnimatedImage(AnimatedImage* const image) {
if (image != NULL) {
free(image->raw_mem);
free(image->frames);
image->num_frames = 0;
image->frames = NULL;
image->raw_mem = NULL;
}
}
@ -60,9 +83,10 @@ static void ZeroFillCanvas(uint8_t* rgba,
// Clear given frame rectangle to transparent.
static void ZeroFillFrameRect(uint8_t* rgba, int rgba_stride, int x_offset,
int y_offset, int width, int height) {
int j;
assert(width * kNumChannels <= rgba_stride);
rgba += y_offset * rgba_stride + x_offset * kNumChannels;
for (int j = 0; j < height; ++j) {
for (j = 0; j < height; ++j) {
memset(rgba, 0, width * kNumChannels);
rgba += rgba_stride;
}
@ -79,12 +103,13 @@ static void CopyCanvas(const uint8_t* src, uint8_t* dst,
static void CopyFrameRectangle(const uint8_t* src, uint8_t* dst, int stride,
int x_offset, int y_offset,
int width, int height) {
int j;
const int width_in_bytes = width * kNumChannels;
assert(width_in_bytes <= stride);
const size_t offset = y_offset * stride + x_offset * kNumChannels;
assert(width_in_bytes <= stride);
src += offset;
dst += offset;
for (int j = 0; j < height; ++j) {
for (j = 0; j < height; ++j) {
memcpy(dst, src, width_in_bytes);
src += stride;
dst += stride;
@ -104,71 +129,84 @@ static void CleanupTransparentPixels(uint32_t* rgba,
}
}
// Dump frame to a PAM file.
// Returns true on success.
static bool DumpFrame(const char filename[], const char dump_folder[],
uint32_t frame_num, const uint8_t rgba[],
int canvas_width, int canvas_height) {
const std::string filename_str = filename;
const size_t slash_idx = filename_str.find_last_of("/\\");
const std::string base_name = (slash_idx != std::string::npos)
? filename_str.substr(slash_idx + 1)
: filename_str;
ostringstream dump_file;
dump_file << dump_folder << "/" << base_name << "_frame_" << frame_num
<< ".pam";
// Dump frame to a PAM file. Returns true on success.
static int DumpFrame(const char filename[], const char dump_folder[],
uint32_t frame_num, const uint8_t rgba[],
int canvas_width, int canvas_height) {
int ok = 0;
size_t max_len;
int y;
const char* base_name = NULL;
char* file_name = NULL;
FILE* f = NULL;
ofstream fout(dump_file.str().c_str(), ios::binary | ios::out);
if (!fout.good()) {
fprintf(stderr, "Error opening file for writing: %s\n",
dump_file.str().c_str());
return false;
base_name = strrchr(filename, '/');
base_name = (base_name == NULL) ? filename : base_name + 1;
max_len = strlen(dump_folder) + 1 + strlen(base_name)
+ strlen("_frame_") + strlen(".pam") + 8;
file_name = (char*)malloc(max_len * sizeof(*file_name));
if (file_name == NULL) goto End;
if (snprintf(file_name, max_len, "%s/%s_frame_%d.pam",
dump_folder, base_name, frame_num) < 0) {
fprintf(stderr, "Error while generating file name\n");
goto End;
}
fout << "P7\nWIDTH " << canvas_width << "\nHEIGHT " << canvas_height
<< "\nDEPTH 4\nMAXVAL 255\nTUPLTYPE RGB_ALPHA\nENDHDR\n";
for (int y = 0; y < canvas_height; ++y) {
fout.write(
reinterpret_cast<const char*>(rgba) + y * canvas_width * kNumChannels,
canvas_width * kNumChannels);
if (!fout.good()) {
fprintf(stderr, "Error writing to file: %s\n", dump_file.str().c_str());
return 0;
f = fopen(file_name, "wb");
if (f == NULL) {
fprintf(stderr, "Error opening file for writing: %s\n", file_name);
ok = 0;
goto End;
}
if (fprintf(f, "P7\nWIDTH %d\nHEIGHT %d\n"
"DEPTH 4\nMAXVAL 255\nTUPLTYPE RGB_ALPHA\nENDHDR\n",
canvas_width, canvas_height) < 0) {
fprintf(stderr, "Write error for file %s\n", file_name);
goto End;
}
for (y = 0; y < canvas_height; ++y) {
if (fwrite((const char*)(rgba) + y * canvas_width * kNumChannels,
canvas_width * kNumChannels, 1, f) != 1) {
fprintf(stderr, "Error writing to file: %s\n", file_name);
goto End;
}
}
fout.close();
return true;
ok = 1;
End:
if (f != NULL) fclose(f);
free(file_name);
return ok;
}
// -----------------------------------------------------------------------------
// WebP Decoding.
// Returns true if this is a valid WebP bitstream.
static bool IsWebP(const std::string& file_str) {
return WebPGetInfo(reinterpret_cast<const uint8_t*>(file_str.c_str()),
file_str.length(), NULL, NULL) != 0;
static int IsWebP(const WebPData* const webp_data) {
return (WebPGetInfo(webp_data->bytes, webp_data->size, NULL, NULL) != 0);
}
// Read animated WebP bitstream 'file_str' into 'AnimatedImage' struct.
static bool ReadAnimatedWebP(const char filename[], const std::string& file_str,
AnimatedImage* const image, bool dump_frames,
const char dump_folder[]) {
bool ok = false;
bool dump_ok = true;
static int ReadAnimatedWebP(const char filename[],
const WebPData* const webp_data,
AnimatedImage* const image, int dump_frames,
const char dump_folder[]) {
int ok = 0;
int dump_ok = 1;
uint32_t frame_index = 0;
int prev_frame_timestamp = 0;
WebPAnimDecoder* dec;
WebPAnimInfo anim_info;
const WebPData webp_data = {
reinterpret_cast<const uint8_t*>(file_str.data()), file_str.size()
};
memset(image, 0, sizeof(*image));
WebPAnimDecoder* dec = WebPAnimDecoderNew(&webp_data);
dec = WebPAnimDecoderNew(webp_data);
if (dec == NULL) {
fprintf(stderr, "Error parsing image: %s\n", filename);
goto End;
}
WebPAnimInfo anim_info;
if (!WebPAnimDecoderGetInfo(dec, &anim_info)) {
fprintf(stderr, "Error getting global info about the animation\n");
goto End;
@ -181,25 +219,28 @@ static bool ReadAnimatedWebP(const char filename[], const std::string& file_str,
image->bgcolor = anim_info.bgcolor;
// Allocate frames.
AllocateFrames(image, anim_info.frame_count);
if (!AllocateFrames(image, anim_info.frame_count)) return 0;
// Decode frames.
while (WebPAnimDecoderHasMoreFrames(dec)) {
DecodedFrame* curr_frame;
uint8_t* curr_rgba;
uint8_t* frame_rgba;
int timestamp;
if (!WebPAnimDecoderGetNext(dec, &frame_rgba, &timestamp)) {
fprintf(stderr, "Error decoding frame #%u\n", frame_index);
goto End;
}
DecodedFrame* const curr_frame = &image->frames[frame_index];
uint8_t* const curr_rgba = curr_frame->rgba.data();
curr_frame = &image->frames[frame_index];
curr_rgba = curr_frame->rgba;
curr_frame->duration = timestamp - prev_frame_timestamp;
curr_frame->is_key_frame = false; // Unused.
curr_frame->is_key_frame = 0; // Unused.
memcpy(curr_rgba, frame_rgba,
image->canvas_width * kNumChannels * image->canvas_height);
// Needed only because we may want to compare with GIF later.
CleanupTransparentPixels(reinterpret_cast<uint32_t*>(curr_rgba),
CleanupTransparentPixels((uint32_t*)curr_rgba,
image->canvas_width, image->canvas_height);
if (dump_frames && dump_ok) {
@ -224,12 +265,11 @@ static bool ReadAnimatedWebP(const char filename[], const std::string& file_str,
// GIF Decoding.
// Returns true if this is a valid GIF bitstream.
static bool IsGIF(const std::string& file_str) {
const char* const cstr = file_str.c_str();
return file_str.length() > GIF_STAMP_LEN &&
(!memcmp(GIF_STAMP, cstr, GIF_STAMP_LEN) ||
!memcmp(GIF87_STAMP, cstr, GIF_STAMP_LEN) ||
!memcmp(GIF89_STAMP, cstr, GIF_STAMP_LEN));
static int IsGIF(const WebPData* const data) {
return data->size > GIF_STAMP_LEN &&
(!memcmp(GIF_STAMP, data->bytes, GIF_STAMP_LEN) ||
!memcmp(GIF87_STAMP, data->bytes, GIF_STAMP_LEN) ||
!memcmp(GIF89_STAMP, data->bytes, GIF_STAMP_LEN));
}
#ifdef WEBP_HAVE_GIF
@ -247,13 +287,13 @@ static bool IsGIF(const std::string& file_str) {
#if !LOCAL_GIF_PREREQ(5, 0)
// Added in v5.0
typedef struct GraphicsControlBlock {
typedef struct {
int DisposalMode;
#define DISPOSAL_UNSPECIFIED 0 // No disposal specified
#define DISPOSE_DO_NOT 1 // Leave image in place
#define DISPOSE_BACKGROUND 2 // Set area to background color
#define DISPOSE_PREVIOUS 3 // Restore to previous content
bool UserInputFlag; // User confirmation required before disposal
int UserInputFlag; // User confirmation required before disposal
int DelayTime; // Pre-display delay in 0.01sec units
int TransparentColor; // Palette index for transparency, -1 if none
#define NO_TRANSPARENT_COLOR -1
@ -269,7 +309,7 @@ static int DGifExtensionToGCB(const size_t GifExtensionLength,
gcb->UserInputFlag = (GifExtension[0] & 0x02) != 0;
gcb->DelayTime = GifExtension[1] | (GifExtension[2] << 8);
if (GifExtension[0] & 0x01) {
gcb->TransparentColor = static_cast<int>(GifExtension[3]);
gcb->TransparentColor = (int)GifExtension[3];
} else {
gcb->TransparentColor = NO_TRANSPARENT_COLOR;
}
@ -283,7 +323,7 @@ static int DGifSavedExtensionToGCB(GifFileType* GifFile, int ImageIndex,
return GIF_ERROR;
}
gcb->DisposalMode = DISPOSAL_UNSPECIFIED;
gcb->UserInputFlag = false;
gcb->UserInputFlag = 0;
gcb->DelayTime = 0;
gcb->TransparentColor = NO_TRANSPARENT_COLOR;
@ -291,7 +331,7 @@ static int DGifSavedExtensionToGCB(GifFileType* GifFile, int ImageIndex,
ExtensionBlock* ep = &GifFile->SavedImages[ImageIndex].ExtensionBlocks[i];
if (ep->Function == GRAPHICS_EXT_FUNC_CODE) {
return DGifExtensionToGCB(
ep->ByteCount, reinterpret_cast<const GifByteType*>(ep->Bytes), gcb);
ep->ByteCount, (const GifByteType*)ep->Bytes, gcb);
}
}
return GIF_ERROR;
@ -313,11 +353,10 @@ static void GIFDisplayError(const GifFileType* const gif, int gif_error) {
// libgif 4.2.0 has retired PrintGifError() and added GifErrorString().
#if LOCAL_GIF_PREREQ(4, 2)
#if LOCAL_GIF_PREREQ(5, 0)
// Static string actually, hence the const char* cast.
const char* error_str = (const char*)GifErrorString(
(gif == NULL) ? gif_error : gif->Error);
const char* error_str =
GifErrorString((gif == NULL) ? gif_error : gif->Error);
#else
const char* error_str = (const char*)GifErrorString();
const char* error_str = GifErrorString();
(void)gif;
#endif
if (error_str == NULL) error_str = "Unknown error";
@ -330,22 +369,23 @@ static void GIFDisplayError(const GifFileType* const gif, int gif_error) {
#endif
}
static bool IsKeyFrameGIF(const GifImageDesc& prev_desc, int prev_dispose,
const DecodedFrame* const prev_frame,
int canvas_width, int canvas_height) {
if (prev_frame == NULL) return true;
static int IsKeyFrameGIF(const GifImageDesc* prev_desc, int prev_dispose,
const DecodedFrame* const prev_frame,
int canvas_width, int canvas_height) {
if (prev_frame == NULL) return 1;
if (prev_dispose == DISPOSE_BACKGROUND) {
if (IsFullFrame(prev_desc.Width, prev_desc.Height,
if (IsFullFrame(prev_desc->Width, prev_desc->Height,
canvas_width, canvas_height)) {
return true;
return 1;
}
if (prev_frame->is_key_frame) return true;
if (prev_frame->is_key_frame) return 1;
}
return false;
return 0;
}
static int GetTransparentIndexGIF(GifFileType* gif) {
GraphicsControlBlock first_gcb = GraphicsControlBlock();
GraphicsControlBlock first_gcb;
memset(&first_gcb, 0, sizeof(first_gcb));
DGifSavedExtensionToGCB(gif, 0, &first_gcb);
return first_gcb.TransparentColor;
}
@ -370,13 +410,15 @@ static uint32_t GetBackgroundColorGIF(GifFileType* gif) {
// Find appropriate app extension and get loop count from the next extension.
static uint32_t GetLoopCountGIF(const GifFileType* const gif) {
for (int i = 0; i < gif->ImageCount; ++i) {
int i;
for (i = 0; i < gif->ImageCount; ++i) {
const SavedImage* const image = &gif->SavedImages[i];
for (int j = 0; (j + 1) < image->ExtensionBlockCount; ++j) {
int j;
for (j = 0; (j + 1) < image->ExtensionBlockCount; ++j) {
const ExtensionBlock* const eb1 = image->ExtensionBlocks + j;
const ExtensionBlock* const eb2 = image->ExtensionBlocks + j + 1;
const char* const signature = reinterpret_cast<const char*>(eb1->Bytes);
const bool signature_is_ok =
const char* const signature = (const char*)eb1->Bytes;
const int signature_is_ok =
(eb1->Function == APPLICATION_EXT_FUNC_CODE) &&
(eb1->ByteCount == 11) &&
(!memcmp(signature, "NETSCAPE2.0", 11) ||
@ -384,8 +426,8 @@ static uint32_t GetLoopCountGIF(const GifFileType* const gif) {
if (signature_is_ok &&
eb2->Function == CONTINUE_EXT_FUNC_CODE && eb2->ByteCount >= 3 &&
eb2->Bytes[0] == 1) {
return (static_cast<uint32_t>(eb2->Bytes[2]) << 8) +
(static_cast<uint32_t>(eb2->Bytes[1]) << 0);
return ((uint32_t)(eb2->Bytes[2]) << 8) +
((uint32_t)(eb2->Bytes[1]) << 0);
}
}
}
@ -394,18 +436,19 @@ static uint32_t GetLoopCountGIF(const GifFileType* const gif) {
// Get duration of 'n'th frame in milliseconds.
static int GetFrameDurationGIF(GifFileType* gif, int n) {
GraphicsControlBlock gcb = GraphicsControlBlock();
GraphicsControlBlock gcb;
memset(&gcb, 0, sizeof(gcb));
DGifSavedExtensionToGCB(gif, n, &gcb);
return gcb.DelayTime * 10;
}
// Returns true if frame 'target' completely covers 'covered'.
static bool CoversFrameGIF(const GifImageDesc& target,
const GifImageDesc& covered) {
return target.Left <= covered.Left &&
covered.Left + covered.Width <= target.Left + target.Width &&
target.Top <= covered.Top &&
covered.Top + covered.Height <= target.Top + target.Height;
static int CoversFrameGIF(const GifImageDesc* const target,
const GifImageDesc* const covered) {
return target->Left <= covered->Left &&
covered->Left + covered->Width <= target->Left + target->Width &&
target->Top <= covered->Top &&
covered->Top + covered->Height <= target->Top + target->Height;
}
static void RemapPixelsGIF(const uint8_t* const src,
@ -425,65 +468,72 @@ static void RemapPixelsGIF(const uint8_t* const src,
}
}
static bool ReadFrameGIF(const SavedImage* const gif_image,
const ColorMapObject* cmap, int transparent_color,
int out_stride, uint8_t* const dst) {
const GifImageDesc& image_desc = gif_image->ImageDesc;
if (image_desc.ColorMap) {
cmap = image_desc.ColorMap;
}
static int ReadFrameGIF(const SavedImage* const gif_image,
const ColorMapObject* cmap, int transparent_color,
int out_stride, uint8_t* const dst) {
const GifImageDesc* image_desc = &gif_image->ImageDesc;
const uint8_t* in;
uint8_t* out;
int j;
if (image_desc->ColorMap) cmap = image_desc->ColorMap;
if (cmap == NULL || cmap->ColorCount != (1 << cmap->BitsPerPixel)) {
fprintf(stderr, "Potentially corrupt color map.\n");
return false;
fprintf(stderr, "Potentially corrupt color map.\n");
return 0;
}
const uint8_t* in = reinterpret_cast<uint8_t*>(gif_image->RasterBits);
uint8_t* out =
dst + image_desc.Top * out_stride + image_desc.Left * kNumChannels;
in = (const uint8_t*)gif_image->RasterBits;
out = dst + image_desc->Top * out_stride + image_desc->Left * kNumChannels;
for (int j = 0; j < image_desc.Height; ++j) {
RemapPixelsGIF(in, cmap, transparent_color, image_desc.Width, out);
in += image_desc.Width;
out += out_stride;
for (j = 0; j < image_desc->Height; ++j) {
RemapPixelsGIF(in, cmap, transparent_color, image_desc->Width, out);
in += image_desc->Width;
out += out_stride;
}
return true;
return 1;
}
// Read animated GIF bitstream from 'filename' into 'AnimatedImage' struct.
static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
bool dump_frames, const char dump_folder[]) {
GifFileType* gif = DGifOpenFileName(filename, NULL);
static int ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
int dump_frames, const char dump_folder[]) {
uint32_t frame_count;
uint32_t canvas_width, canvas_height;
uint32_t i;
int gif_error;
GifFileType* gif;
gif = DGifOpenFileName(filename, NULL);
if (gif == NULL) {
fprintf(stderr, "Could not read file: %s.\n", filename);
return false;
return 0;
}
const int gif_error = DGifSlurp(gif);
gif_error = DGifSlurp(gif);
if (gif_error != GIF_OK) {
fprintf(stderr, "Could not parse image: %s.\n", filename);
GIFDisplayError(gif, gif_error);
DGifCloseFile(gif, NULL);
return false;
return 0;
}
// Animation properties.
image->canvas_width = static_cast<uint32_t>(gif->SWidth);
image->canvas_height = static_cast<uint32_t>(gif->SHeight);
image->canvas_width = (uint32_t)gif->SWidth;
image->canvas_height = (uint32_t)gif->SHeight;
if (image->canvas_width > MAX_CANVAS_SIZE ||
image->canvas_height > MAX_CANVAS_SIZE) {
fprintf(stderr, "Invalid canvas dimension: %d x %d\n",
image->canvas_width, image->canvas_height);
DGifCloseFile(gif, NULL);
return false;
return 0;
}
image->loop_count = GetLoopCountGIF(gif);
image->bgcolor = GetBackgroundColorGIF(gif);
const uint32_t frame_count = static_cast<uint32_t>(gif->ImageCount);
frame_count = (uint32_t)gif->ImageCount;
if (frame_count == 0) {
DGifCloseFile(gif, NULL);
return false;
return 0;
}
if (image->canvas_width == 0 || image->canvas_height == 0) {
@ -494,33 +544,38 @@ static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
if (image->canvas_width == 0 || image->canvas_height == 0) {
fprintf(stderr, "Invalid canvas size in GIF.\n");
DGifCloseFile(gif, NULL);
return false;
return 0;
}
}
// Allocate frames.
AllocateFrames(image, frame_count);
const uint32_t canvas_width = image->canvas_width;
const uint32_t canvas_height = image->canvas_height;
canvas_width = image->canvas_width;
canvas_height = image->canvas_height;
// Decode and reconstruct frames.
for (uint32_t i = 0; i < frame_count; ++i) {
for (i = 0; i < frame_count; ++i) {
const int canvas_width_in_bytes = canvas_width * kNumChannels;
const SavedImage* const curr_gif_image = &gif->SavedImages[i];
GraphicsControlBlock curr_gcb = GraphicsControlBlock();
GraphicsControlBlock curr_gcb;
DecodedFrame* curr_frame;
uint8_t* curr_rgba;
memset(&curr_gcb, 0, sizeof(curr_gcb));
DGifSavedExtensionToGCB(gif, i, &curr_gcb);
DecodedFrame* const curr_frame = &image->frames[i];
uint8_t* const curr_rgba = curr_frame->rgba.data();
curr_frame = &image->frames[i];
curr_rgba = curr_frame->rgba;
curr_frame->duration = GetFrameDurationGIF(gif, i);
if (i == 0) { // Initialize as transparent.
curr_frame->is_key_frame = true;
curr_frame->is_key_frame = 1;
ZeroFillCanvas(curr_rgba, canvas_width, canvas_height);
} else {
DecodedFrame* const prev_frame = &image->frames[i - 1];
const GifImageDesc& prev_desc = gif->SavedImages[i - 1].ImageDesc;
GraphicsControlBlock prev_gcb = GraphicsControlBlock();
const GifImageDesc* const prev_desc = &gif->SavedImages[i - 1].ImageDesc;
GraphicsControlBlock prev_gcb;
memset(&prev_gcb, 0, sizeof(prev_gcb));
DGifSavedExtensionToGCB(gif, i - 1, &prev_gcb);
curr_frame->is_key_frame =
@ -530,32 +585,35 @@ static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
if (curr_frame->is_key_frame) { // Initialize as transparent.
ZeroFillCanvas(curr_rgba, canvas_width, canvas_height);
} else {
int prev_frame_disposed, curr_frame_opaque;
int prev_frame_completely_covered;
// Initialize with previous canvas.
uint8_t* const prev_rgba = image->frames[i - 1].rgba.data();
uint8_t* const prev_rgba = image->frames[i - 1].rgba;
CopyCanvas(prev_rgba, curr_rgba, canvas_width, canvas_height);
// Dispose previous frame rectangle.
bool prev_frame_disposed =
prev_frame_disposed =
(prev_gcb.DisposalMode == DISPOSE_BACKGROUND ||
prev_gcb.DisposalMode == DISPOSE_PREVIOUS);
bool curr_frame_opaque =
curr_frame_opaque =
(curr_gcb.TransparentColor == NO_TRANSPARENT_COLOR);
bool prev_frame_completely_covered =
prev_frame_completely_covered =
curr_frame_opaque &&
CoversFrameGIF(curr_gif_image->ImageDesc, prev_desc);
CoversFrameGIF(&curr_gif_image->ImageDesc, prev_desc);
if (prev_frame_disposed && !prev_frame_completely_covered) {
switch (prev_gcb.DisposalMode) {
case DISPOSE_BACKGROUND: {
ZeroFillFrameRect(curr_rgba, canvas_width_in_bytes,
prev_desc.Left, prev_desc.Top,
prev_desc.Width, prev_desc.Height);
prev_desc->Left, prev_desc->Top,
prev_desc->Width, prev_desc->Height);
break;
}
case DISPOSE_PREVIOUS: {
int src_frame_num = i - 2;
while (src_frame_num >= 0) {
GraphicsControlBlock src_frame_gcb = GraphicsControlBlock();
GraphicsControlBlock src_frame_gcb;
memset(&src_frame_gcb, 0, sizeof(src_frame_gcb));
DGifSavedExtensionToGCB(gif, src_frame_num, &src_frame_gcb);
if (src_frame_gcb.DisposalMode != DISPOSE_PREVIOUS) break;
--src_frame_num;
@ -564,17 +622,17 @@ static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
// Restore pixels inside previous frame rectangle to
// corresponding pixels in source canvas.
uint8_t* const src_frame_rgba =
image->frames[src_frame_num].rgba.data();
image->frames[src_frame_num].rgba;
CopyFrameRectangle(src_frame_rgba, curr_rgba,
canvas_width_in_bytes,
prev_desc.Left, prev_desc.Top,
prev_desc.Width, prev_desc.Height);
prev_desc->Left, prev_desc->Top,
prev_desc->Width, prev_desc->Height);
} else {
// Source canvas doesn't exist. So clear previous frame
// rectangle to background.
ZeroFillFrameRect(curr_rgba, canvas_width_in_bytes,
prev_desc.Left, prev_desc.Top,
prev_desc.Width, prev_desc.Height);
prev_desc->Left, prev_desc->Top,
prev_desc->Width, prev_desc->Height);
}
break;
}
@ -589,67 +647,65 @@ static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
if (!ReadFrameGIF(curr_gif_image, gif->SColorMap, curr_gcb.TransparentColor,
canvas_width_in_bytes, curr_rgba)) {
DGifCloseFile(gif, NULL);
return false;
return 0;
}
if (dump_frames) {
if (!DumpFrame(filename, dump_folder, i, curr_rgba,
canvas_width, canvas_height)) {
DGifCloseFile(gif, NULL);
return false;
return 0;
}
}
}
DGifCloseFile(gif, NULL);
return true;
return 1;
}
#else
static bool ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
bool dump_frames, const char dump_folder[]) {
static int ReadAnimatedGIF(const char filename[], AnimatedImage* const image,
int dump_frames, const char dump_folder[]) {
(void)filename;
(void)image;
(void)dump_frames;
(void)dump_folder;
fprintf(stderr, "GIF support not compiled. Please install the libgif-dev "
"package before building.\n");
return false;
return 0;
}
#endif // WEBP_HAVE_GIF
// -----------------------------------------------------------------------------
static bool ReadFile(const char filename[], std::string* filestr) {
ifstream fin(filename, ios::binary);
if (!fin.good()) return false;
ostringstream strout;
strout << fin.rdbuf();
*filestr = strout.str();
fin.close();
return true;
}
int ReadAnimatedImage(const char filename[], AnimatedImage* const image,
int dump_frames, const char dump_folder[]) {
int ok = 0;
WebPData webp_data;
bool ReadAnimatedImage(const char filename[], AnimatedImage* const image,
bool dump_frames, const char dump_folder[]) {
std::string file_str;
if (!ReadFile(filename, &file_str)) {
WebPDataInit(&webp_data);
memset(image, 0, sizeof(*image));
if (!ExUtilReadFile(filename, &webp_data.bytes, &webp_data.size)) {
fprintf(stderr, "Error reading file: %s\n", filename);
return false;
return 0;
}
if (IsWebP(file_str)) {
return ReadAnimatedWebP(filename, file_str, image, dump_frames,
dump_folder);
} else if (IsGIF(file_str)) {
return ReadAnimatedGIF(filename, image, dump_frames, dump_folder);
if (IsWebP(&webp_data)) {
ok = ReadAnimatedWebP(filename, &webp_data, image, dump_frames,
dump_folder);
} else if (IsGIF(&webp_data)) {
ok = ReadAnimatedGIF(filename, image, dump_frames, dump_folder);
} else {
fprintf(stderr,
"Unknown file type: %s. Supported file types are WebP and GIF\n",
filename);
return false;
ok = 0;
}
if (!ok) ClearAnimatedImage(image);
WebPDataClear(&webp_data);
return ok;
}
static void Accumulate(double v1, double v2, double* const max_diff,
@ -660,25 +716,27 @@ static void Accumulate(double v1, double v2, double* const max_diff,
}
void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
uint32_t width, uint32_t height, bool premultiply,
uint32_t width, uint32_t height, int premultiply,
int* const max_diff, double* const psnr) {
const uint32_t stride = width * kNumChannels;
const int kAlphaChannel = kNumChannels - 1;
double f_max_diff = 0.;
double sse = 0.;
for (uint32_t y = 0; y < height; ++y) {
for (uint32_t x = 0; x < stride; x += kNumChannels) {
uint32_t x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < stride; x += kNumChannels) {
int k;
const size_t offset = y * stride + x;
const int alpha1 = rgba1[offset + kAlphaChannel];
const int alpha2 = rgba2[offset + kAlphaChannel];
Accumulate(alpha1, alpha2, &f_max_diff, &sse);
if (!premultiply) {
for (int k = 0; k < kAlphaChannel; ++k) {
for (k = 0; k < kAlphaChannel; ++k) {
Accumulate(rgba1[offset + k], rgba2[offset + k], &f_max_diff, &sse);
}
} else {
// premultiply R/G/B channels with alpha value
for (int k = 0; k < kAlphaChannel; ++k) {
for (k = 0; k < kAlphaChannel; ++k) {
Accumulate(rgba1[offset + k] * alpha1 / 255.,
rgba2[offset + k] * alpha2 / 255.,
&f_max_diff, &sse);
@ -686,11 +744,11 @@ void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
}
}
}
*max_diff = static_cast<int>(f_max_diff);
*max_diff = (int)f_max_diff;
if (*max_diff == 0) {
*psnr = 99.; // PSNR when images are identical.
} else {
sse /= stride * height;
*psnr = 10. * log10(255. * 255. / sse);
*psnr = 4.3429448 * log(255. * 255. / sse);
}
}

40
examples/anim_util.h
View File

@ -16,34 +16,48 @@
#include "webp/config.h"
#endif
#include <vector>
#include "webp/types.h"
struct DecodedFrame {
std::vector<uint8_t> rgba; // Decoded and reconstructed full frame.
int duration; // Frame duration in milliseconds.
bool is_key_frame; // True if this frame is a key-frame.
};
#ifdef __cplusplus
extern "C" {
#endif
struct AnimatedImage {
typedef struct {
uint8_t* rgba; // Decoded and reconstructed full frame.
int duration; // Frame duration in milliseconds.
int is_key_frame; // True if this frame is a key-frame.
} DecodedFrame;
typedef struct {
uint32_t canvas_width;
uint32_t canvas_height;
uint32_t bgcolor;
uint32_t loop_count;
std::vector<DecodedFrame> frames;
};
DecodedFrame* frames;
uint32_t num_frames;
void* raw_mem;
} AnimatedImage;
// Deallocate everything in 'image' (but not the object itself).
void ClearAnimatedImage(AnimatedImage* const image);
// Read animated image file into 'AnimatedImage' struct.
// If 'dump_frames' is true, dump frames to 'dump_folder'.
bool ReadAnimatedImage(const char filename[], AnimatedImage* const image,
bool dump_frames, const char dump_folder[]);
// Previous content of 'image' is obliterated.
// Upon successful return, content of 'image' must be deleted by
// calling 'ClearAnimatedImage'.
int ReadAnimatedImage(const char filename[], AnimatedImage* const image,
int dump_frames, const char dump_folder[]);
// Given two RGBA buffers, calculate max pixel difference and PSNR.
// If 'premultiply' is true, R/G/B values will be pre-multiplied by the
// transparency before comparison.
void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
uint32_t width, uint32_t height, bool premultiply,
uint32_t width, uint32_t height, int premultiply,
int* const max_diff, double* const psnr);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_ANIM_UTIL_H_

42
makefile.unix
View File

@ -62,19 +62,13 @@ EXTRA_FLAGS += -DWEBP_USE_THREAD
EXTRA_LIBS += -lpthread
# Extra flags to emulate C89 strictness with the full ANSI
EXTRA_C89_FLAGS = -Wextra -Wold-style-definition
EXTRA_C89_FLAGS += -Wmissing-prototypes
EXTRA_C89_FLAGS += -Wmissing-declarations
EXTRA_C89_FLAGS += -Wdeclaration-after-statement
EXTRA_C89_FLAGS += -Wshadow
EXTRA_C89_FLAGS += -Wformat-security -Wformat-nonliteral
# EXTRA_C89_FLAGS += -Wvla
EXTRA_CXX_FLAGS = -Wextra
EXTRA_CXX_FLAGS += -Wmissing-declarations
EXTRA_CXX_FLAGS += -Wshadow
EXTRA_CXX_FLAGS += -Wformat-security -Wformat-nonliteral
# EXTRA_CXX_FLAGS += -Wvla
EXTRA_FLAGS += -Wextra -Wold-style-definition
EXTRA_FLAGS += -Wmissing-prototypes
EXTRA_FLAGS += -Wmissing-declarations
EXTRA_FLAGS += -Wdeclaration-after-statement
EXTRA_FLAGS += -Wshadow
EXTRA_FLAGS += -Wformat-security -Wformat-nonliteral
# EXTRA_FLAGS += -Wvla
# SSE4.1-specific flags:
ifeq ($(HAVE_SSE41), 1)
@ -97,11 +91,8 @@ endif
AR = ar
ARFLAGS = r
CPPFLAGS = -Isrc/ -Wall
COMMONFLAGS = -O3 -DNDEBUG $(EXTRA_FLAGS)
CFLAGS = -O3 -DNDEBUG $(EXTRA_FLAGS)
CC = gcc
CFLAGS = $(COMMONFLAGS) $(EXTRA_C89_FLAGS)
CXX = g++
CXXFLAGS = $(COMMONFLAGS) $(EXTRA_CXX_FLAGS)
INSTALL = install
GROFF = /usr/bin/groff
COL = /usr/bin/col
@ -299,18 +290,18 @@ HDRS = \
OUT_LIBS = examples/libexample_util.a src/libwebpdecoder.a src/libwebp.a
EXTRA_LIB = src/libwebpextras.a
OUT_EXAMPLES = examples/cwebp examples/dwebp
EXTRA_EXAMPLES = examples/gif2webp examples/vwebp examples/webpmux
EXTRA_CXX_EXAMPLES = examples/anim_diff
EXTRA_EXAMPLES = examples/gif2webp examples/vwebp examples/webpmux \
examples/anim_diff
OUTPUT = $(OUT_LIBS) $(OUT_EXAMPLES)
ifeq ($(MAKECMDGOALS),clean)
OUTPUT += $(EXTRA_EXAMPLES) $(EXTRA_CXX_EXAMPLES)
OUTPUT += $(EXTRA_EXAMPLES)
OUTPUT += src/demux/libwebpdemux.a src/mux/libwebpmux.a $(EXTRA_LIB)
OUTPUT += examples/libgifdec.a examples/libanim_util.a
endif
ex: $(OUT_EXAMPLES)
all: ex $(EXTRA_EXAMPLES) $(EXTRA_CXX_EXAMPLES)
all: ex $(EXTRA_EXAMPLES)
extras: $(EXTRA_LIB)
$(EX_FORMAT_DEC_OBJS): %.o: %.h
@ -326,9 +317,6 @@ src/utils/bit_writer.o: src/utils/endian_inl.h
%.o: %.c $(HDRS)
$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
%.o: %.cc $(HDRS)
$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $< -o $@
examples/libanim_util.a: $(ANIM_UTIL_OBJS)
examples/libexample_util.a: $(EX_UTIL_OBJS)
examples/libgifdec.a: $(GIFDEC_OBJS)
@ -349,7 +337,8 @@ examples/vwebp: examples/vwebp.o
examples/webpmux: examples/webpmux.o
examples/anim_diff: examples/libanim_util.a examples/libgifdec.a
examples/anim_diff: src/demux/libwebpdemux.a src/libwebp.a
examples/anim_diff: src/demux/libwebpdemux.a examples/libexample_util.a
examples/anim_diff: src/libwebp.a
examples/anim_diff: EXTRA_LIBS += $(GIF_LIBS)
examples/anim_diff: EXTRA_FLAGS += -DWEBP_HAVE_GIF
examples/cwebp: examples/libexample_util.a src/libwebp.a
@ -370,9 +359,6 @@ examples/webpmux: src/libwebpdecoder.a
$(OUT_EXAMPLES) $(EXTRA_EXAMPLES):
$(CC) -o $@ $^ $(LDFLAGS)
$(EXTRA_CXX_EXAMPLES):
$(CXX) -o $@ $^ $(LDFLAGS)
dist: DESTDIR := dist
dist: OUT_EXAMPLES += $(EXTRA_EXAMPLES)
dist: all