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4860008483
libwebp/examples/webpmux.c
skal 4860008483 Change the order of -frame argument to be more natural 
Now, its: +duration+xoffset+yoffset+disposal
+disposal can be omitted and will default to +0 (NONE)
additionally, +xoffset+yoffset can be omitted and will default to +0+0

Change-Id: I62138c9f675d4fc4408305babbcd485cb32b73d3
2012-11-14 06:19:31 +01:00

1002 lines
34 KiB
C
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// Copyright 2011 Google Inc. All Rights Reserved.
//
// This code is licensed under the same terms as WebM:
// Software License Agreement: http://www.webmproject.org/license/software/
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
// -----------------------------------------------------------------------------
//
// Simple command-line to create a WebP container file and to extract or strip
// relevant data from the container file.
//
// Compile with: gcc -o webpmux webpmux.c -lwebpmux -lwebp
//
//
// Authors: Vikas (vikaas.arora@gmail.com),
// Urvang (urvang@google.com)
/* Usage examples:
Create container WebP file:
webpmux -frgm fragment_1.webp +0+0 \
-frgm fragment_2.webp +960+0 \
-frgm fragment_3.webp +0+576 \
-frgm fragment_4.webp +960+576 \
-o out_fragment_container.webp
webpmux -frame anim_1.webp +100+10+10 \
-frame anim_2.webp +100+25+25+1 \
-frame anim_3.webp +100+50+50+1 \
-frame anim_4.webp +100 \
-loop 10 -bgcolor 128,255,255,255 \
-o out_animation_container.webp
webpmux -set icc image_profile.icc in.webp -o out_icc_container.webp
webpmux -set exif image_metadata.exif in.webp -o out_exif_container.webp
webpmux -set xmp image_metadata.xmp in.webp -o out_xmp_container.webp
Extract relevant data from WebP container file:
webpmux -get frgm n in.webp -o out_fragment.webp
webpmux -get frame n in.webp -o out_frame.webp
webpmux -get icc in.webp -o image_profile.icc
webpmux -get exif in.webp -o image_metadata.exif
webpmux -get xmp in.webp -o image_metadata.xmp
Strip data from WebP Container file:
webpmux -strip icc in.webp -o out.webp
webpmux -strip exif in.webp -o out.webp
webpmux -strip xmp in.webp -o out.webp
Misc:
webpmux -info in.webp
webpmux [ -h | -help ]
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "webp/mux.h"
#include "./example_util.h"
//------------------------------------------------------------------------------
// Config object to parse command-line arguments.
typedef enum {
NIL_ACTION = 0,
ACTION_GET,
ACTION_SET,
ACTION_STRIP,
ACTION_INFO,
ACTION_HELP
} ActionType;
typedef enum {
NIL_SUBTYPE = 0,
SUBTYPE_ANMF,
SUBTYPE_LOOP,
SUBTYPE_BGCOLOR
} FeatureSubType;
typedef struct {
FeatureSubType subtype_;
const char* filename_;
const char* params_;
} FeatureArg;
typedef enum {
NIL_FEATURE = 0,
FEATURE_EXIF,
FEATURE_XMP,
FEATURE_ICCP,
FEATURE_ANMF,
FEATURE_FRGM,
LAST_FEATURE
} FeatureType;
static const char* const kFourccList[LAST_FEATURE] = {
NULL, "EXIF", "XMP ", "ICCP", "ANMF", "FRGM"
};
static const char* const kDescriptions[LAST_FEATURE] = {
NULL, "EXIF metadata", "XMP metadata", "ICC profile",
"Animation frame", "Image fragment"
};
typedef struct {
FeatureType type_;
FeatureArg* args_;
int arg_count_;
} Feature;
typedef struct {
ActionType action_type_;
const char* input_;
const char* output_;
Feature feature_;
} WebPMuxConfig;
//------------------------------------------------------------------------------
// Helper functions.
static int CountOccurrences(const char* arglist[], int list_length,
const char* arg) {
int i;
int num_occurences = 0;
for (i = 0; i < list_length; ++i) {
if (!strcmp(arglist[i], arg)) {
++num_occurences;
}
}
return num_occurences;
}
static const char* const kErrorMessages[] = {
"WEBP_MUX_NOT_FOUND", "WEBP_MUX_INVALID_ARGUMENT", "WEBP_MUX_BAD_DATA",
"WEBP_MUX_MEMORY_ERROR", "WEBP_MUX_NOT_ENOUGH_DATA"
};
static const char* ErrorString(WebPMuxError err) {
assert(err <= WEBP_MUX_NOT_FOUND && err >= WEBP_MUX_NOT_ENOUGH_DATA);
return kErrorMessages[-err];
}
#define RETURN_IF_ERROR(ERR_MSG) \
if (err != WEBP_MUX_OK) { \
fprintf(stderr, ERR_MSG); \
return err; \
}
#define RETURN_IF_ERROR2(ERR_MSG, FORMAT_STR) \
if (err != WEBP_MUX_OK) { \
fprintf(stderr, ERR_MSG, FORMAT_STR); \
return err; \
}
#define RETURN_IF_ERROR3(ERR_MSG, FORMAT_STR1, FORMAT_STR2) \
if (err != WEBP_MUX_OK) { \
fprintf(stderr, ERR_MSG, FORMAT_STR1, FORMAT_STR2); \
return err; \
}
#define ERROR_GOTO1(ERR_MSG, LABEL) \
do { \
fprintf(stderr, ERR_MSG); \
ok = 0; \
goto LABEL; \
} while (0)
#define ERROR_GOTO2(ERR_MSG, FORMAT_STR, LABEL) \
do { \
fprintf(stderr, ERR_MSG, FORMAT_STR); \
ok = 0; \
goto LABEL; \
} while (0)
#define ERROR_GOTO3(ERR_MSG, FORMAT_STR1, FORMAT_STR2, LABEL) \
do { \
fprintf(stderr, ERR_MSG, FORMAT_STR1, FORMAT_STR2); \
ok = 0; \
goto LABEL; \
} while (0)
static WebPMuxError DisplayInfo(const WebPMux* mux) {
uint32_t flag;
WebPMuxError err = WebPMuxGetFeatures(mux, &flag);
RETURN_IF_ERROR("Failed to retrieve features\n");
if (flag == 0) {
fprintf(stderr, "No features present.\n");
return err;
}
// Print the features present.
printf("Features present:");
if (flag & ANIMATION_FLAG) printf(" animation");
if (flag & FRAGMENTS_FLAG) printf(" image fragments");
if (flag & ICCP_FLAG) printf(" icc profile");
if (flag & EXIF_FLAG) printf(" EXIF metadata");
if (flag & XMP_FLAG) printf(" XMP metadata");
if (flag & ALPHA_FLAG) printf(" transparency");
printf("\n");
if ((flag & ANIMATION_FLAG) || (flag & FRAGMENTS_FLAG)) {
const int is_anim = !!(flag & ANIMATION_FLAG);
const WebPChunkId id = is_anim ? WEBP_CHUNK_ANMF : WEBP_CHUNK_FRGM;
const char* const type_str = is_anim ? "frame" : "fragment";
int nFrames;
if (is_anim) {
WebPMuxAnimParams params;
err = WebPMuxGetAnimationParams(mux, &params);
RETURN_IF_ERROR("Failed to retrieve animation parameters\n");
printf("Background color : 0x%.8X Loop Count : %d\n",
params.bgcolor, params.loop_count);
}
err = WebPMuxNumChunks(mux, id, &nFrames);
RETURN_IF_ERROR2("Failed to retrieve number of %ss\n", type_str);
printf("Number of %ss: %d\n", type_str, nFrames);
if (nFrames > 0) {
int i;
printf("No.: x_offset y_offset ");
if (is_anim) printf("duration dispose ");
printf("image_size\n");
for (i = 1; i <= nFrames; i++) {
WebPMuxFrameInfo frame;
err = WebPMuxGetFrame(mux, i, &frame);
RETURN_IF_ERROR3("Failed to retrieve %s#%d\n", type_str, i);
printf("%3d: %8d %8d ", i, frame.x_offset, frame.y_offset);
if (is_anim) printf("%8d %7d ", frame.duration, frame.dispose_method);
printf("%10zu\n", frame.bitstream.size);
WebPDataClear(&frame.bitstream);
}
}
}
if (flag & ICCP_FLAG) {
WebPData icc_profile;
err = WebPMuxGetChunk(mux, "ICCP", &icc_profile);
RETURN_IF_ERROR("Failed to retrieve the ICC profile\n");
printf("Size of the ICC profile data: %zu\n", icc_profile.size);
}
if (flag & EXIF_FLAG) {
WebPData exif;
err = WebPMuxGetChunk(mux, "EXIF", &exif);
RETURN_IF_ERROR("Failed to retrieve the EXIF metadata\n");
printf("Size of the EXIF metadata: %zu\n", exif.size);
}
if (flag & XMP_FLAG) {
WebPData xmp;
err = WebPMuxGetChunk(mux, "XMP ", &xmp);
RETURN_IF_ERROR("Failed to retrieve the XMP metadata\n");
printf("Size of the XMP metadata: %zu\n", xmp.size);
}
if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | FRAGMENTS_FLAG))) {
WebPMuxFrameInfo image;
err = WebPMuxGetFrame(mux, 1, &image);
RETURN_IF_ERROR("Failed to retrieve the image\n");
printf("Size of the image (with alpha): %zu\n", image.bitstream.size);
}
return WEBP_MUX_OK;
}
static void PrintHelp(void) {
printf("Usage: webpmux -get GET_OPTIONS INPUT -o OUTPUT\n");
printf(" webpmux -set SET_OPTIONS INPUT -o OUTPUT\n");
printf(" webpmux -strip STRIP_OPTIONS INPUT -o OUTPUT\n");
printf(" webpmux -frgm FRAGMENT_OPTIONS [-frgm...] -o OUTPUT\n");
printf(" webpmux -frame FRAME_OPTIONS [-frame...] [-loop LOOP_COUNT]"
"\n");
printf(" [-bgcolor BACKGROUND_COLOR] -o OUTPUT\n");
printf(" webpmux -info INPUT\n");
printf(" webpmux [-h|-help]\n");
printf("\n");
printf("GET_OPTIONS:\n");
printf(" Extract relevant data.\n");
printf(" icc Get ICC profile.\n");
printf(" exif Get EXIF metadata.\n");
printf(" xmp Get XMP metadata.\n");
printf(" frgm n Get nth fragment.\n");
printf(" frame n Get nth frame.\n");
printf("\n");
printf("SET_OPTIONS:\n");
printf(" Set color profile/metadata.\n");
printf(" icc file.icc Set ICC profile.\n");
printf(" exif file.exif Set EXIF metadata.\n");
printf(" xmp file.xmp Set XMP metadata.\n");
printf(" where: 'file.icc' contains the ICC profile to be set,\n");
printf(" 'file.exif' contains the EXIF metadata to be set\n");
printf(" 'file.xmp' contains the XMP metadata to be set\n");
printf("\n");
printf("STRIP_OPTIONS:\n");
printf(" Strip color profile/metadata.\n");
printf(" icc Strip ICC profile.\n");
printf(" exif Strip EXIF metadata.\n");
printf(" xmp Strip XMP metadata.\n");
printf("\n");
printf("FRAGMENT_OPTIONS(i):\n");
printf(" Create fragmented image.\n");
printf(" file_i +xi+yi\n");
printf(" where: 'file_i' is the i'th fragment (WebP format),\n");
printf(" 'xi','yi' specify the image offset for this fragment."
"\n");
printf("\n");
printf("FRAME_OPTIONS(i):\n");
printf(" Create animation.\n");
printf(" file_i +xi+yi+di+mi\n");
printf(" where: 'file_i' is the i'th animation frame (WebP format),\n");
printf(" 'xi','yi' specify the image offset for this frame.\n");
printf(" 'di' is the pause duration before next frame.\n");
printf(" 'mi' is the dispose method for this frame (0 or 1).\n");
printf("\n");
printf("LOOP_COUNT:\n");
printf(" Number of times to repeat the animation.\n");
printf(" Valid range is 0 to 65535 [Default: 0 (infinite)].\n");
printf("\n");
printf("BACKGROUND_COLOR:\n");
printf(" Background color of the canvas.\n");
printf(" A,R,G,B\n");
printf(" where: 'A', 'R', 'G' and 'B' are integers in the range 0 to 255 "
"specifying\n");
printf(" the Alpha, Red, Green and Blue component values "
"respectively\n");
printf(" [Default: 255,255,255,255].\n");
printf("\nINPUT & OUTPUT are in WebP format.\n");
printf("\nNote: The nature of EXIF, XMP and ICC data is not checked");
printf(" and is assumed to be\nvalid.\n");
}
static int ReadFileToWebPData(const char* const filename,
WebPData* const webp_data) {
const uint8_t* data;
size_t size;
if (!ExUtilReadFile(filename, &data, &size)) return 0;
webp_data->bytes = data;
webp_data->size = size;
return 1;
}
static int CreateMux(const char* const filename, WebPMux** mux) {
WebPData bitstream;
assert(mux != NULL);
if (!ReadFileToWebPData(filename, &bitstream)) return 0;
*mux = WebPMuxCreate(&bitstream, 1);
free((void*)bitstream.bytes);
if (*mux != NULL) return 1;
fprintf(stderr, "Failed to create mux object from file %s.\n", filename);
return 0;
}
static int WriteData(const char* filename, const WebPData* const webpdata) {
int ok = 0;
FILE* fout = strcmp(filename, "-") ? fopen(filename, "wb") : stdout;
if (!fout) {
fprintf(stderr, "Error opening output WebP file %s!\n", filename);
return 0;
}
if (fwrite(webpdata->bytes, webpdata->size, 1, fout) != 1) {
fprintf(stderr, "Error writing file %s!\n", filename);
} else {
fprintf(stderr, "Saved file %s (%zu bytes)\n", filename, webpdata->size);
ok = 1;
}
if (fout != stdout) fclose(fout);
return ok;
}
static int WriteWebP(WebPMux* const mux, const char* filename) {
int ok;
WebPData webp_data;
const WebPMuxError err = WebPMuxAssemble(mux, &webp_data);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "Error (%s) assembling the WebP file.\n", ErrorString(err));
return 0;
}
ok = WriteData(filename, &webp_data);
WebPDataClear(&webp_data);
return ok;
}
static int ParseFrameArgs(const char* args, WebPMuxFrameInfo* const info) {
int dispose_method, dummy;
const int num_args = sscanf(args, "+%d+%d+%d+%d+%d",
&info->duration, &info->x_offset, &info->y_offset,
&dispose_method, &dummy);
switch (num_args) {
case 1:
info->x_offset = info->y_offset = 0; // fall through
case 3:
dispose_method = 0; // fall through
case 4:
break;
default:
return 0;
}
// Note: The sanity of the following conversion is checked by
// WebPMuxSetAnimationParams().
info->dispose_method = (WebPMuxAnimDispose)dispose_method;
return 1;
}
static int ParseFragmentArgs(const char* args, WebPMuxFrameInfo* const info) {
return (sscanf(args, "+%d+%d", &info->x_offset, &info->y_offset) == 2);
}
static int ParseBgcolorArgs(const char* args, uint32_t* const bgcolor) {
uint32_t a, r, g, b;
if (sscanf(args, "%u,%u,%u,%u", &a, &r, &g, &b) != 4) return 0;
if (a >= 256 || r >= 256 || g >= 256 || b >= 256) return 0;
*bgcolor = (a << 24) | (r << 16) | (g << 8) | (b << 0);
return 1;
}
//------------------------------------------------------------------------------
// Clean-up.
static void DeleteConfig(WebPMuxConfig* config) {
if (config != NULL) {
free(config->feature_.args_);
free(config);
}
}
//------------------------------------------------------------------------------
// Parsing.
// Basic syntactic checks on the command-line arguments.
// Returns 1 on valid, 0 otherwise.
// Also fills up num_feature_args to be number of feature arguments given.
// (e.g. if there are 4 '-frame's and 1 '-loop', then num_feature_args = 5).
static int ValidateCommandLine(int argc, const char* argv[],
int* num_feature_args) {
int num_frame_args;
int num_frgm_args;
int num_loop_args;
int num_bgcolor_args;
int ok = 1;
assert(num_feature_args != NULL);
*num_feature_args = 0;
// Simple checks.
if (CountOccurrences(argv, argc, "-get") > 1) {
ERROR_GOTO1("ERROR: Multiple '-get' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(argv, argc, "-set") > 1) {
ERROR_GOTO1("ERROR: Multiple '-set' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(argv, argc, "-strip") > 1) {
ERROR_GOTO1("ERROR: Multiple '-strip' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(argv, argc, "-info") > 1) {
ERROR_GOTO1("ERROR: Multiple '-info' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(argv, argc, "-o") > 1) {
ERROR_GOTO1("ERROR: Multiple output files specified.\n", ErrValidate);
}
// Compound checks.
num_frame_args = CountOccurrences(argv, argc, "-frame");
num_frgm_args = CountOccurrences(argv, argc, "-frgm");
num_loop_args = CountOccurrences(argv, argc, "-loop");
num_bgcolor_args = CountOccurrences(argv, argc, "-bgcolor");
if (num_loop_args > 1) {
ERROR_GOTO1("ERROR: Multiple loop counts specified.\n", ErrValidate);
}
if (num_bgcolor_args > 1) {
ERROR_GOTO1("ERROR: Multiple background colors specified.\n", ErrValidate);
}
if ((num_frame_args == 0) && (num_loop_args + num_bgcolor_args > 0)) {
ERROR_GOTO1("ERROR: Loop count and background color are relevant only in "
"case of animation.\n", ErrValidate);
}
if (num_frame_args > 0 && num_frgm_args > 0) {
ERROR_GOTO1("ERROR: Only one of frames & fragments can be specified at a "
"time.\n", ErrValidate);
}
assert(ok == 1);
if (num_frame_args == 0 && num_frgm_args == 0) {
// Single argument ('set' action for ICCP/EXIF/XMP, OR a 'get' action).
*num_feature_args = 1;
} else {
// Multiple arguments ('set' action for animation or fragmented image).
if (num_frame_args > 0) {
*num_feature_args = num_frame_args + num_loop_args + num_bgcolor_args;
} else {
*num_feature_args = num_frgm_args;
}
}
ErrValidate:
return ok;
}
#define ACTION_IS_NIL (config->action_type_ == NIL_ACTION)
#define FEATURETYPE_IS_NIL (feature->type_ == NIL_FEATURE)
#define CHECK_NUM_ARGS_LESS(NUM, LABEL) \
if (argc < i + (NUM)) { \
fprintf(stderr, "ERROR: Too few arguments for '%s'.\n", argv[i]); \
goto LABEL; \
}
#define CHECK_NUM_ARGS_NOT_EQUAL(NUM, LABEL) \
if (argc != i + (NUM)) { \
fprintf(stderr, "ERROR: Too many arguments for '%s'.\n", argv[i]); \
goto LABEL; \
}
// Parses command-line arguments to fill up config object. Also performs some
// semantic checks.
static int ParseCommandLine(int argc, const char* argv[],
WebPMuxConfig* config) {
int i = 0;
int feature_arg_index = 0;
int ok = 1;
while (i < argc) {
Feature* const feature = &config->feature_;
FeatureArg* const arg = &feature->args_[feature_arg_index];
if (argv[i][0] == '-') { // One of the action types or output.
if (!strcmp(argv[i], "-set")) {
if (ACTION_IS_NIL) {
config->action_type_ = ACTION_SET;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
++i;
} else if (!strcmp(argv[i], "-get")) {
if (ACTION_IS_NIL) {
config->action_type_ = ACTION_GET;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
++i;
} else if (!strcmp(argv[i], "-strip")) {
if (ACTION_IS_NIL) {
config->action_type_ = ACTION_STRIP;
feature->arg_count_ = 0;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
++i;
} else if (!strcmp(argv[i], "-frame")) {
CHECK_NUM_ARGS_LESS(3, ErrParse);
if (ACTION_IS_NIL || config->action_type_ == ACTION_SET) {
config->action_type_ = ACTION_SET;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
if (FEATURETYPE_IS_NIL || feature->type_ == FEATURE_ANMF) {
feature->type_ = FEATURE_ANMF;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->subtype_ = SUBTYPE_ANMF;
arg->filename_ = argv[i + 1];
arg->params_ = argv[i + 2];
++feature_arg_index;
i += 3;
} else if (!strcmp(argv[i], "-loop") || !strcmp(argv[i], "-bgcolor")) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
if (ACTION_IS_NIL || config->action_type_ == ACTION_SET) {
config->action_type_ = ACTION_SET;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
if (FEATURETYPE_IS_NIL || feature->type_ == FEATURE_ANMF) {
feature->type_ = FEATURE_ANMF;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->subtype_ =
!strcmp(argv[i], "-loop") ? SUBTYPE_LOOP : SUBTYPE_BGCOLOR;
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else if (!strcmp(argv[i], "-frgm")) {
CHECK_NUM_ARGS_LESS(3, ErrParse);
if (ACTION_IS_NIL || config->action_type_ == ACTION_SET) {
config->action_type_ = ACTION_SET;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
if (FEATURETYPE_IS_NIL || feature->type_ == FEATURE_FRGM) {
feature->type_ = FEATURE_FRGM;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->filename_ = argv[i + 1];
arg->params_ = argv[i + 2];
++feature_arg_index;
i += 3;
} else if (!strcmp(argv[i], "-o")) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
config->output_ = argv[i + 1];
i += 2;
} else if (!strcmp(argv[i], "-info")) {
CHECK_NUM_ARGS_NOT_EQUAL(2, ErrParse);
if (config->action_type_ != NIL_ACTION) {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
} else {
config->action_type_ = ACTION_INFO;
feature->arg_count_ = 0;
config->input_ = argv[i + 1];
}
i += 2;
} else if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "-help")) {
PrintHelp();
DeleteConfig(config);
exit(0);
} else {
ERROR_GOTO2("ERROR: Unknown option: '%s'.\n", argv[i], ErrParse);
}
} else { // One of the feature types or input.
if (ACTION_IS_NIL) {
ERROR_GOTO1("ERROR: Action must be specified before other arguments.\n",
ErrParse);
}
if (!strcmp(argv[i], "icc") || !strcmp(argv[i], "exif") ||
!strcmp(argv[i], "xmp")) {
if (FEATURETYPE_IS_NIL) {
feature->type_ = (!strcmp(argv[i], "icc")) ? FEATURE_ICCP :
(!strcmp(argv[i], "exif")) ? FEATURE_EXIF : FEATURE_XMP;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
if (config->action_type_ == ACTION_SET) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
arg->filename_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else {
++i;
}
} else if ((!strcmp(argv[i], "frame") ||
!strcmp(argv[i], "frgm")) &&
(config->action_type_ == ACTION_GET)) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
feature->type_ = (!strcmp(argv[i], "frame")) ? FEATURE_ANMF :
FEATURE_FRGM;
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else { // Assume input file.
if (config->input_ == NULL) {
config->input_ = argv[i];
} else {
ERROR_GOTO2("ERROR at '%s': Multiple input files specified.\n",
argv[i], ErrParse);
}
++i;
}
}
}
ErrParse:
return ok;
}
// Additional checks after config is filled.
static int ValidateConfig(WebPMuxConfig* config) {
int ok = 1;
Feature* const feature = &config->feature_;
// Action.
if (ACTION_IS_NIL) {
ERROR_GOTO1("ERROR: No action specified.\n", ErrValidate2);
}
// Feature type.
if (FEATURETYPE_IS_NIL && config->action_type_ != ACTION_INFO) {
ERROR_GOTO1("ERROR: No feature specified.\n", ErrValidate2);
}
// Input file.
if (config->input_ == NULL) {
if (config->action_type_ != ACTION_SET) {
ERROR_GOTO1("ERROR: No input file specified.\n", ErrValidate2);
} else if (feature->type_ != FEATURE_ANMF &&
feature->type_ != FEATURE_FRGM) {
ERROR_GOTO1("ERROR: No input file specified.\n", ErrValidate2);
}
}
// Output file.
if (config->output_ == NULL && config->action_type_ != ACTION_INFO) {
ERROR_GOTO1("ERROR: No output file specified.\n", ErrValidate2);
}
ErrValidate2:
return ok;
}
// Create config object from command-line arguments.
static int InitializeConfig(int argc, const char* argv[],
WebPMuxConfig** config) {
int num_feature_args = 0;
int ok = 1;
assert(config != NULL);
*config = NULL;
// Validate command-line arguments.
if (!ValidateCommandLine(argc, argv, &num_feature_args)) {
ERROR_GOTO1("Exiting due to command-line parsing error.\n", Err1);
}
// Allocate memory.
*config = (WebPMuxConfig*)calloc(1, sizeof(**config));
if (*config == NULL) {
ERROR_GOTO1("ERROR: Memory allocation error.\n", Err1);
}
(*config)->feature_.arg_count_ = num_feature_args;
(*config)->feature_.args_ =
(FeatureArg*)calloc(num_feature_args, sizeof(FeatureArg));
if ((*config)->feature_.args_ == NULL) {
ERROR_GOTO1("ERROR: Memory allocation error.\n", Err1);
}
// Parse command-line.
if (!ParseCommandLine(argc, argv, *config) ||
!ValidateConfig(*config)) {
ERROR_GOTO1("Exiting due to command-line parsing error.\n", Err1);
}
Err1:
return ok;
}
#undef ACTION_IS_NIL
#undef FEATURETYPE_IS_NIL
#undef CHECK_NUM_ARGS_LESS
#undef CHECK_NUM_ARGS_MORE
//------------------------------------------------------------------------------
// Processing.
static int GetFrameFragment(const WebPMux* mux,
const WebPMuxConfig* config, int isFrame) {
WebPMuxError err = WEBP_MUX_OK;
WebPMux* mux_single = NULL;
long num = 0;
int ok = 1;
const WebPChunkId id = isFrame ? WEBP_CHUNK_ANMF : WEBP_CHUNK_FRGM;
WebPMuxFrameInfo info;
WebPDataInit(&info.bitstream);
num = strtol(config->feature_.args_[0].params_, NULL, 10);
if (num < 0) {
ERROR_GOTO1("ERROR: Frame/Fragment index must be non-negative.\n", ErrGet);
}
err = WebPMuxGetFrame(mux, num, &info);
if (err == WEBP_MUX_OK && info.id != id) err = WEBP_MUX_NOT_FOUND;
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not get frame %ld.\n",
ErrorString(err), num, ErrGet);
}
mux_single = WebPMuxNew();
if (mux_single == NULL) {
err = WEBP_MUX_MEMORY_ERROR;
ERROR_GOTO2("ERROR (%s): Could not allocate a mux object.\n",
ErrorString(err), ErrGet);
}
err = WebPMuxSetImage(mux_single, &info.bitstream, 1);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not create single image mux object.\n",
ErrorString(err), ErrGet);
}
ok = WriteWebP(mux_single, config->output_);
ErrGet:
WebPDataClear(&info.bitstream);
WebPMuxDelete(mux_single);
return ok;
}
// Read and process config.
static int Process(const WebPMuxConfig* config) {
WebPMux* mux = NULL;
WebPData chunk;
WebPMuxError err = WEBP_MUX_OK;
int index = 0;
int ok = 1;
const Feature* const feature = &config->feature_;
switch (config->action_type_) {
case ACTION_GET:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
switch (feature->type_) {
case FEATURE_ANMF:
case FEATURE_FRGM:
ok = GetFrameFragment(mux, config,
(feature->type_ == FEATURE_ANMF) ? 1 : 0);
break;
case FEATURE_ICCP:
case FEATURE_EXIF:
case FEATURE_XMP:
err = WebPMuxGetChunk(mux, kFourccList[feature->type_], &chunk);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not get the %s.\n",
ErrorString(err), kDescriptions[feature->type_], Err2);
}
ok = WriteData(config->output_, &chunk);
break;
default:
ERROR_GOTO1("ERROR: Invalid feature for action 'get'.\n", Err2);
break;
}
break;
case ACTION_SET:
switch (feature->type_) {
case FEATURE_ANMF: {
WebPMuxAnimParams params = { 0xFFFFFFFF, 0 };
mux = WebPMuxNew();
if (mux == NULL) {
ERROR_GOTO2("ERROR (%s): Could not allocate a mux object.\n",
ErrorString(WEBP_MUX_MEMORY_ERROR), Err2);
}
for (index = 0; index < feature->arg_count_; ++index) {
switch (feature->args_[index].subtype_) {
case SUBTYPE_BGCOLOR: {
uint32_t bgcolor;
ok = ParseBgcolorArgs(feature->args_[index].params_, &bgcolor);
if (!ok) {
ERROR_GOTO1("ERROR: Could not parse the background color \n",
Err2);
}
params.bgcolor = bgcolor;
break;
}
case SUBTYPE_LOOP: {
const long loop_count =
strtol(feature->args_[index].params_, NULL, 10);
if (loop_count != (int)loop_count) {
// Note: This is only a 'necessary' condition for loop_count
// to be valid. The 'sufficient' conditioned in checked in
// WebPMuxSetAnimationParams() method called later.
ERROR_GOTO1("ERROR: Loop count must be in the range 0 to "
"65535.\n", Err2);
}
params.loop_count = (int)loop_count;
break;
}
case SUBTYPE_ANMF: {
WebPMuxFrameInfo frame;
frame.id = WEBP_CHUNK_ANMF;
ok = ReadFileToWebPData(feature->args_[index].filename_,
&frame.bitstream);
if (!ok) goto Err2;
ok = ParseFrameArgs(feature->args_[index].params_, &frame);
if (!ok) {
WebPDataClear(&frame.bitstream);
ERROR_GOTO1("ERROR: Could not parse frame properties.\n",
Err2);
}
err = WebPMuxPushFrame(mux, &frame, 1);
WebPDataClear(&frame.bitstream);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not add a frame at index %d."
"\n", ErrorString(err), index, Err2);
}
break;
}
default: {
ERROR_GOTO1("ERROR: Invalid subtype for 'frame'", Err2);
break;
}
}
}
err = WebPMuxSetAnimationParams(mux, &params);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not set animation parameters.\n",
ErrorString(err), Err2);
}
break;
}
case FEATURE_FRGM:
mux = WebPMuxNew();
if (mux == NULL) {
ERROR_GOTO2("ERROR (%s): Could not allocate a mux object.\n",
ErrorString(WEBP_MUX_MEMORY_ERROR), Err2);
}
for (index = 0; index < feature->arg_count_; ++index) {
WebPMuxFrameInfo frgm;
frgm.id = WEBP_CHUNK_FRGM;
ok = ReadFileToWebPData(feature->args_[index].filename_,
&frgm.bitstream);
if (!ok) goto Err2;
ok = ParseFragmentArgs(feature->args_[index].params_, &frgm);
if (!ok) {
WebPDataClear(&frgm.bitstream);
ERROR_GOTO1("ERROR: Could not parse fragment properties.\n",
Err2);
}
err = WebPMuxPushFrame(mux, &frgm, 1);
WebPDataClear(&frgm.bitstream);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not add a fragment at index %d.\n",
ErrorString(err), index, Err2);
}
}
break;
case FEATURE_ICCP:
case FEATURE_EXIF:
case FEATURE_XMP:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = ReadFileToWebPData(feature->args_[0].filename_, &chunk);
if (!ok) goto Err2;
err = WebPMuxSetChunk(mux, kFourccList[feature->type_], &chunk, 1);
free((void*)chunk.bytes);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not set the %s.\n",
ErrorString(err), kDescriptions[feature->type_], Err2);
}
break;
default:
ERROR_GOTO1("ERROR: Invalid feature for action 'set'.\n", Err2);
break;
}
ok = WriteWebP(mux, config->output_);
break;
case ACTION_STRIP:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
if (feature->type_ == FEATURE_ICCP || feature->type_ == FEATURE_EXIF ||
feature->type_ == FEATURE_XMP) {
err = WebPMuxDeleteChunk(mux, kFourccList[feature->type_]);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not strip the %s.\n",
ErrorString(err), kDescriptions[feature->type_], Err2);
}
} else {
ERROR_GOTO1("ERROR: Invalid feature for action 'strip'.\n", Err2);
break;
}
ok = WriteWebP(mux, config->output_);
break;
case ACTION_INFO:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = (DisplayInfo(mux) == WEBP_MUX_OK);
break;
default:
assert(0); // Invalid action.
break;
}
Err2:
WebPMuxDelete(mux);
return ok;
}
//------------------------------------------------------------------------------
// Main.
int main(int argc, const char* argv[]) {
WebPMuxConfig* config;
int ok = InitializeConfig(argc - 1, argv + 1, &config);
if (ok) {
ok = Process(config);
} else {
PrintHelp();
}
DeleteConfig(config);
return !ok;
}
//------------------------------------------------------------------------------
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