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e9a7d145e7
libwebp/examples/webpmux.c
James Zern a0b2736d79 cosmetics & warnings 
- remove some unused functions
- move global arrays from data to read only section
- explicitly cast malloc returns; not specifically necessary, but helps
  show intent
- miscellaneous formatting

Change-Id: Ib15fe5b37fe6c29c369ad928bdc3a7290cd13c84
2012-01-30 17:19:53 -08:00

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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 -tile tile_1.webp +0+0 \
-tile tile_2.webp +960+0 \
-tile tile_3.webp +0+576 \
-tile tile_4.webp +960+576 \
-o out_tile_container.webp
webpmux -frame anim_1.webp +0+0+0 \
-frame anim_2.webp +25+25+100 \
-frame anim_3.webp +50+50+100 \
-frame anim_4.webp +0+0+100 \
-loop 10 \
-o out_animation_container.webp
webpmux -set icc image_profile.icc in.webp -o out_icc_container.webp
webpmux -set xmp image_metadata.xmp in.webp -o out_xmp_container.webp
Extract relevant data from WebP container file:
webpmux -get tile n in.webp -o out_tile.webp
webpmux -get frame n in.webp -o out_frame.webp
webpmux -get icc in.webp -o image_profile.icc
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 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"
//------------------------------------------------------------------------------
// 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_FRM,
SUBTYPE_LOOP
} FeatureSubType;
typedef struct {
FeatureSubType subtype_;
const char* filename_;
const char* params_;
} FeatureArg;
typedef enum {
NIL_FEATURE = 0,
FEATURE_XMP,
FEATURE_ICCP,
FEATURE_FRM,
FEATURE_TILE
} FeatureType;
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 int IsNotCompatible(int count1, int count2) {
return (count1 > 0) != (count2 > 0);
}
// Allocate necessary storage for dst then copy the contents of src.
// Returns 1 on success.
static int WebPDataCopy(const WebPData* const src, WebPData* const dst) {
if (src == NULL || dst == NULL) return 0;
memset(dst, 0, sizeof(*dst));
if (src->bytes_ != NULL && src->size_ != 0) {
dst->bytes_ = (uint8_t*)malloc(src->size_);
if (dst->bytes_ == NULL) return 0;
memcpy((void*)dst->bytes_, src->bytes_, src->size_);
dst->size_ = src->size_;
}
return 1;
}
// Frees data allocated by WebPDataCopy.
static void WebPDataFree(WebPData* const webpdata) {
free((void*)webpdata->bytes_);
memset(webpdata, 0, sizeof(*webpdata));
}
#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 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 & TILE_FLAG) printf(" tiling");
if (flag & ICCP_FLAG) printf(" icc profile");
if (flag & META_FLAG) printf(" metadata");
if (flag & ALPHA_FLAG) printf(" transparency");
printf("\n");
if (flag & ANIMATION_FLAG) {
int nFrames;
uint32_t loop_count;
err = WebPMuxGetLoopCount(mux, &loop_count);
RETURN_IF_ERROR("Failed to retrieve loop count\n");
printf("Loop Count : %d\n", loop_count);
err = WebPMuxNumNamedElements(mux, "frame", &nFrames);
RETURN_IF_ERROR("Failed to retrieve number of frames\n");
printf("Number of frames: %d\n", nFrames);
if (nFrames > 0) {
int i;
printf("No.: x_offset y_offset duration image_size");
if (flag & ALPHA_FLAG) printf(" alpha_size");
printf("\n");
for (i = 1; i <= nFrames; i++) {
uint32_t x_offset, y_offset, duration;
WebPData image, alpha;
err = WebPMuxGetFrame(mux, i, &image, &alpha,
&x_offset, &y_offset, &duration);
RETURN_IF_ERROR2("Failed to retrieve frame#%d\n", i);
printf("%3d: %8d %8d %8d %10u",
i, x_offset, y_offset, duration, image.size_);
if (flag & ALPHA_FLAG) printf(" %10u", alpha.size_);
printf("\n");
}
}
}
if (flag & TILE_FLAG) {
int nTiles;
err = WebPMuxNumNamedElements(mux, "tile", &nTiles);
RETURN_IF_ERROR("Failed to retrieve number of tiles\n");
printf("Number of tiles: %d\n", nTiles);
if (nTiles > 0) {
int i;
printf("No.: x_offset y_offset image_size");
if (flag & ALPHA_FLAG) printf(" alpha_size");
printf("\n");
for (i = 1; i <= nTiles; i++) {
uint32_t x_offset, y_offset;
WebPData image, alpha;
err = WebPMuxGetTile(mux, i, &image, &alpha, &x_offset, &y_offset);
RETURN_IF_ERROR2("Failed to retrieve tile#%d\n", i);
printf("%3d: %8d %8d %10u",
i, x_offset, y_offset, image.size_);
if (flag & ALPHA_FLAG) printf(" %10u", alpha.size_);
printf("\n");
}
}
}
if (flag & ICCP_FLAG) {
WebPData icc_profile;
err = WebPMuxGetColorProfile(mux, &icc_profile);
RETURN_IF_ERROR("Failed to retrieve the color profile\n");
printf("Size of the color profile data: %u\n", icc_profile.size_);
}
if (flag & META_FLAG) {
WebPData metadata;
err = WebPMuxGetMetadata(mux, &metadata);
RETURN_IF_ERROR("Failed to retrieve the XMP metadata\n");
printf("Size of the XMP metadata: %u\n", metadata.size_);
}
if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | TILE_FLAG))) {
WebPData image, alpha;
err = WebPMuxGetImage(mux, &image, &alpha);
RETURN_IF_ERROR("Failed to retrieve the image\n");
printf("Size of the alpha data: %u\n", alpha.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 -tile TILE_OPTIONS [-tile...] -o OUTPUT\n");
printf(" webpmux -frame FRAME_OPTIONS [-frame...]");
printf(" -loop LOOP_COUNT -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 ICCP Color profile.\n");
printf(" xmp Get XMP metadata.\n");
printf(" tile n Get nth tile.\n");
printf(" frame n Get nth frame.\n");
printf("\n");
printf("SET_OPTIONS:\n");
printf(" Set color profile/metadata.\n");
printf(" icc Set ICC Color profile.\n");
printf(" xmp Set XMP metadata.\n");
printf("\n");
printf("STRIP_OPTIONS:\n");
printf(" Strip color profile/metadata.\n");
printf(" icc Strip ICCP color profile.\n");
printf(" xmp Strip XMP metadata.\n");
printf("\n");
printf("TILE_OPTIONS(i):\n");
printf(" Create tiled image.\n");
printf(" file_i +xi+yi\n");
printf(" where: 'file_i' is the i'th tile (webp format),\n");
printf(" 'xi','yi' specify the image offset for this tile.\n");
printf("\n");
printf("FRAME_OPTIONS(i):\n");
printf(" Create animation.\n");
printf(" file_i +xi+yi+di\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("\nINPUT & OUTPUT are in webp format.\n");
}
static int ReadData(const char* filename,
uint8_t** data_ptr, uint32_t* size_ptr) {
void* data = NULL;
long size = 0;
int ok = 0;
FILE* in;
*size_ptr = 0;
in = fopen(filename, "rb");
if (!in) {
fprintf(stderr, "Failed to open file %s\n", filename);
return 0;
}
fseek(in, 0, SEEK_END);
size = ftell(in);
fseek(in, 0, SEEK_SET);
if (size > 0xffffffffu) {
fprintf(stderr, "Size (%ld bytes) is out of range for file %s\n",
size, filename);
size = 0;
goto Err;
}
if (size < 0) {
size = 0;
goto Err;
}
data = malloc(size);
if (data) {
if (fread(data, size, 1, in) != 1) {
free(data);
data = NULL;
size = 0;
fprintf(stderr, "Failed to read %ld bytes from file %s\n",
size, filename);
goto Err;
}
ok = 1;
} else {
fprintf(stderr, "Failed to allocate %ld bytes for reading file %s\n",
size, filename);
size = 0;
}
Err:
if (in != stdin) fclose(in);
*size_ptr = (uint32_t)size;
*data_ptr = (uint8_t*)data;
return ok;
}
static int ReadFile(const char* const filename, WebPMux** mux) {
uint32_t size = 0;
uint8_t* data = NULL;
WebPMuxState mux_state;
assert(mux != NULL);
if (!ReadData(filename, &data, &size)) return 0;
*mux = WebPMuxCreate(data, size, 1, &mux_state);
free(data);
if (*mux != NULL && mux_state == WEBP_MUX_STATE_COMPLETE) return 1;
fprintf(stderr, "Failed to create mux object from file %s. mux_state = %d.\n",
filename, mux_state);
return 0;
}
static int ReadImage(const char* filename,
WebPData* const image_ptr, WebPData* const alpha_ptr) {
uint8_t* data = NULL;
uint32_t size = 0;
WebPData image, alpha;
WebPMux* mux;
WebPMuxError err;
int ok = 0;
WebPMuxState mux_state;
if (!ReadData(filename, &data, &size)) return 0;
mux = WebPMuxCreate(data, size, 1, &mux_state);
free(data);
if (mux == NULL || mux_state != WEBP_MUX_STATE_COMPLETE) {
fprintf(stderr,
"Failed to create mux object from file %s. mux_state = %d.\n",
filename, mux_state);
return 0;
}
err = WebPMuxGetImage(mux, &image, &alpha);
if (err == WEBP_MUX_OK) {
ok = 1;
ok &= WebPDataCopy(&image, image_ptr);
ok &= WebPDataCopy(&alpha, alpha_ptr);
if (!ok) {
fprintf(stderr, "Error allocating storage for image (%u bytes) "
"and alpha (%u bytes) data\n", image.size_, alpha.size_);
WebPDataFree(image_ptr);
WebPDataFree(alpha_ptr);
}
} else {
fprintf(stderr, "Failed to extract image data from file %s. Error: %d\n",
filename, err);
}
WebPMuxDelete(mux);
return ok;
}
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 (%d bytes)\n", filename, webpdata->size_);
ok = 1;
}
if (fout != stdout) fclose(fout);
return ok;
}
static int WriteWebP(WebPMux* const mux, const char* filename) {
WebPData webpdata;
int ok;
const WebPMuxError err = WebPMuxAssemble(
mux, (uint8_t**)&webpdata.bytes_, &webpdata.size_);
if (err != WEBP_MUX_OK) {
fprintf(stderr, "Error (%d) assembling the WebP file.\n", err);
return 0;
}
ok = WriteData(filename, &webpdata);
WebPDataFree(&webpdata);
return ok;
}
static int ParseFrameArgs(const char* args, uint32_t* x_offset,
uint32_t* y_offset, uint32_t* duration) {
return (sscanf(args, "+%d+%d+%d", x_offset, y_offset, duration) == 3);
}
static int ParseTileArgs(const char* args, uint32_t* x_offset,
uint32_t* y_offset) {
return (sscanf(args, "+%d+%d", x_offset, y_offset) == 2);
}
//------------------------------------------------------------------------------
// 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_tile_args;
int num_loop_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_tile_args = CountOccurrences(argv, argc, "-tile");
num_loop_args = CountOccurrences(argv, argc, "-loop");
if (num_loop_args > 1) {
ERROR_GOTO1("ERROR: Multiple loop counts specified.\n", ErrValidate);
}
if (IsNotCompatible(num_frame_args, num_loop_args)) {
ERROR_GOTO1("ERROR: Both frames and loop count have to be specified.\n",
ErrValidate);
}
if (num_frame_args > 0 && num_tile_args > 0) {
ERROR_GOTO1("ERROR: Only one of frames & tiles can be specified at a time."
"\n", ErrValidate);
}
assert(ok == 1);
if (num_frame_args == 0 && num_tile_args == 0) {
// Single argument ('set' action for XMP or ICCP, OR a 'get' action).
*num_feature_args = 1;
} else {
// Multiple arguments ('set' action for animation or tiling).
if (num_frame_args > 0) {
*num_feature_args = num_frame_args + num_loop_args;
} else {
*num_feature_args = num_tile_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_FRM) {
feature->type_ = FEATURE_FRM;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->subtype_ = SUBTYPE_FRM;
arg->filename_ = argv[i + 1];
arg->params_ = argv[i + 2];
++feature_arg_index;
i += 3;
} else if (!strcmp(argv[i], "-loop")) {
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_FRM) {
feature->type_ = FEATURE_FRM;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->subtype_ = SUBTYPE_LOOP;
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else if (!strcmp(argv[i], "-tile")) {
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_TILE) {
feature->type_ = FEATURE_TILE;
} 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], "xmp")) {
if (FEATURETYPE_IS_NIL) {
feature->type_ = (!strcmp(argv[i], "icc")) ? FEATURE_ICCP :
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], "tile")) &&
(config->action_type_ == ACTION_GET)) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
feature->type_ = (!strcmp(argv[i], "frame")) ? FEATURE_FRM :
FEATURE_TILE;
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_FRM &&
feature->type_ != FEATURE_TILE) {
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 GetFrameTile(const WebPMux* mux,
const WebPMuxConfig* config, int isFrame) {
WebPData image, alpha;
uint32_t x_offset = 0;
uint32_t y_offset = 0;
uint32_t duration = 0;
WebPMuxError err = WEBP_MUX_OK;
WebPMux* mux_single = NULL;
long num = 0;
int ok = 1;
num = strtol(config->feature_.args_[0].params_, NULL, 10);
if (num < 0) {
ERROR_GOTO1("ERROR: Frame/Tile index must be non-negative.\n", ErrGet);
}
if (isFrame) {
err = WebPMuxGetFrame(mux, num, &image, &alpha,
&x_offset, &y_offset, &duration);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR#%d: Could not get frame %ld.\n", err, num, ErrGet);
}
} else {
err = WebPMuxGetTile(mux, num, &image, &alpha, &x_offset, &y_offset);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR#%d: Could not get frame %ld.\n", err, num, ErrGet);
}
}
mux_single = WebPMuxNew();
if (mux_single == NULL) {
err = WEBP_MUX_MEMORY_ERROR;
ERROR_GOTO2("ERROR#%d: Could not allocate a mux object.\n", err, ErrGet);
}
err = WebPMuxSetImage(mux_single, image.bytes_, image.size_,
alpha.bytes_, alpha.size_, 1);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not create single image mux object.\n", err,
ErrGet);
}
ok = WriteWebP(mux_single, config->output_);
ErrGet:
WebPMuxDelete(mux_single);
return ok;
}
// Read and process config.
static int Process(const WebPMuxConfig* config) {
WebPMux* mux = NULL;
WebPData webpdata;
uint8_t* data = NULL;
uint32_t size = 0;
uint32_t x_offset = 0;
uint32_t y_offset = 0;
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 = ReadFile(config->input_, &mux);
if (!ok) goto Err2;
switch (feature->type_) {
case FEATURE_FRM:
ok = GetFrameTile(mux, config, 1);
break;
case FEATURE_TILE:
ok = GetFrameTile(mux, config, 0);
break;
case FEATURE_ICCP:
err = WebPMuxGetColorProfile(mux, &webpdata);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not get color profile.\n", err, Err2);
}
ok = WriteData(config->output_, &webpdata);
break;
case FEATURE_XMP:
err = WebPMuxGetMetadata(mux, &webpdata);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not get XMP metadata.\n", err, Err2);
}
ok = WriteData(config->output_, &webpdata);
break;
default:
ERROR_GOTO1("ERROR: Invalid feature for action 'get'.\n", Err2);
break;
}
break;
case ACTION_SET:
switch (feature->type_) {
case FEATURE_FRM:
mux = WebPMuxNew();
if (mux == NULL) {
ERROR_GOTO2("ERROR#%d: Could not allocate a mux object.\n",
WEBP_MUX_MEMORY_ERROR, Err2);
}
for (index = 0; index < feature->arg_count_; ++index) {
if (feature->args_[index].subtype_ == SUBTYPE_LOOP) {
const long num = strtol(feature->args_[index].params_, NULL, 10);
if (num < 0) {
ERROR_GOTO1("ERROR: Loop count must be non-negative.\n", Err2);
}
err = WebPMuxSetLoopCount(mux, num);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not set loop count.\n", err, Err2);
}
} else if (feature->args_[index].subtype_ == SUBTYPE_FRM) {
WebPData image, alpha;
uint32_t duration;
ok = ReadImage(feature->args_[index].filename_, &image, &alpha);
if (!ok) goto Err2;
ok = ParseFrameArgs(feature->args_[index].params_,
&x_offset, &y_offset, &duration);
if (!ok) {
WebPDataFree(&image);
WebPDataFree(&alpha);
ERROR_GOTO1("ERROR: Could not parse frame properties.\n", Err2);
}
err = WebPMuxAddFrame(mux, 0, image.bytes_, image.size_,
alpha.bytes_, alpha.size_,
x_offset, y_offset, duration, 1);
WebPDataFree(&image);
WebPDataFree(&alpha);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR#%d: Could not add a frame at index %d.\n",
err, index, Err2);
}
} else {
ERROR_GOTO1("ERROR: Invalid subtype for 'frame'", Err2);
}
}
break;
case FEATURE_TILE:
mux = WebPMuxNew();
if (mux == NULL) {
ERROR_GOTO2("ERROR#%d: Could not allocate a mux object.\n",
WEBP_MUX_MEMORY_ERROR, Err2);
}
for (index = 0; index < feature->arg_count_; ++index) {
WebPData image, alpha;
ok = ReadImage(feature->args_[index].filename_, &image, &alpha);
if (!ok) goto Err2;
ok = ParseTileArgs(feature->args_[index].params_, &x_offset,
&y_offset);
if (!ok) {
WebPDataFree(&image);
WebPDataFree(&alpha);
ERROR_GOTO1("ERROR: Could not parse tile properties.\n", Err2);
}
err = WebPMuxAddTile(mux, 0, image.bytes_, image.size_,
alpha.bytes_, alpha.size_,
x_offset, y_offset, 1);
WebPDataFree(&image);
WebPDataFree(&alpha);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR#%d: Could not add a tile at index %d.\n",
err, index, Err2);
}
}
break;
case FEATURE_ICCP:
ok = ReadFile(config->input_, &mux);
if (!ok) goto Err2;
ok = ReadData(feature->args_[0].filename_, &data, &size);
if (!ok) goto Err2;
err = WebPMuxSetColorProfile(mux, data, size, 1);
free((void*)data);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not set color profile.\n", err, Err2);
}
break;
case FEATURE_XMP:
ok = ReadFile(config->input_, &mux);
if (!ok) goto Err2;
ok = ReadData(feature->args_[0].filename_, &data, &size);
if (!ok) goto Err2;
err = WebPMuxSetMetadata(mux, data, size, 1);
free(data);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not set XMP metadata.\n", err, Err2);
}
break;
default:
ERROR_GOTO1("ERROR: Invalid feature for action 'set'.\n", Err2);
break;
}
ok = WriteWebP(mux, config->output_);
break;
case ACTION_STRIP:
ok = ReadFile(config->input_, &mux);
if (!ok) goto Err2;
switch (feature->type_) {
case FEATURE_ICCP:
err = WebPMuxDeleteColorProfile(mux);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not delete color profile.\n", err,
Err2);
}
break;
case FEATURE_XMP:
err = WebPMuxDeleteMetadata(mux);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR#%d: Could not delete XMP metadata.\n", err,
Err2);
}
break;
default:
ERROR_GOTO1("ERROR: Invalid feature for action 'strip'.\n", Err2);
break;
}
ok = WriteWebP(mux, config->output_);
break;
case ACTION_INFO:
ok = ReadFile(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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