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libwebp/examples/webpmux.c
Urvang Joshi a077072777 mux struct naming 
members of public structs should not have a trailing underscore.

Change-Id: Ieef42e1da115bf42b0ea42159701e32bed7b9f60
2012-10-31 11:37:49 -07:00

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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 meta image_metadata.meta in.webp -o out_meta_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 meta in.webp -o image_metadata.meta
Strip data from WebP Container file:
webpmux -strip icc in.webp -o out.webp
webpmux -strip meta 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_FRM,
SUBTYPE_LOOP
} FeatureSubType;
typedef struct {
FeatureSubType subtype_;
const char* filename_;
const char* params_;
} FeatureArg;
typedef enum {
NIL_FEATURE = 0,
FEATURE_META,
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 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];
}
static int IsNotCompatible(int count1, int count2) {
return (count1 > 0) != (count2 > 0);
}
#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 & 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) || (flag & TILE_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" : "tile";
int nFrames;
if (is_anim) {
int loop_count;
err = WebPMuxGetLoopCount(mux, &loop_count);
RETURN_IF_ERROR("Failed to retrieve loop count\n");
printf("Loop Count : %d\n", 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 ");
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 ", frame.duration);
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 color profile\n");
printf("Size of the color profile data: %zu\n", icc_profile.size);
}
if (flag & META_FLAG) {
WebPData metadata;
err = WebPMuxGetChunk(mux, "META", &metadata);
RETURN_IF_ERROR("Failed to retrieve the metadata\n");
printf("Size of the metadata: %zu\n", metadata.size);
}
if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | TILE_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 -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(" meta Get XMP/EXIF 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 file.icc Set ICC Color profile.\n");
printf(" meta file.meta Set XMP/EXIF metadata.\n");
printf(" where: 'file.icc' contains the color profile to be set,\n");
printf(" 'file.meta' contains the metadata to be set\n");
printf("\n");
printf("STRIP_OPTIONS:\n");
printf(" Strip color profile/metadata.\n");
printf(" icc Strip ICCP color profile.\n");
printf(" meta Strip XMP/EXIF 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 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) {
return (sscanf(args, "+%d+%d+%d",
&info->x_offset, &info->y_offset, &info->duration) == 3);
}
static int ParseTileArgs(const char* args, WebPMuxFrameInfo* const info) {
return (sscanf(args, "+%d+%d", &info->x_offset, &info->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 META 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], "meta")) {
if (FEATURETYPE_IS_NIL) {
feature->type_ = (!strcmp(argv[i], "icc")) ? FEATURE_ICCP :
FEATURE_META;
} 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) {
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/Tile 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 metadata, color_profile;
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_FRM:
ok = GetFrameTile(mux, config, 1);
break;
case FEATURE_TILE:
ok = GetFrameTile(mux, config, 0);
break;
case FEATURE_ICCP:
err = WebPMuxGetChunk(mux, "ICCP", &color_profile);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not get color profile.\n",
ErrorString(err), Err2);
}
ok = WriteData(config->output_, &color_profile);
break;
case FEATURE_META:
err = WebPMuxGetChunk(mux, "META", &metadata);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not get the metadata.\n",
ErrorString(err), Err2);
}
ok = WriteData(config->output_, &metadata);
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 (%s): Could not allocate a mux object.\n",
ErrorString(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 (%s): Could not set loop count.\n",
ErrorString(err), Err2);
}
} else if (feature->args_[index].subtype_ == SUBTYPE_FRM) {
WebPMuxFrameInfo frame;
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);
}
frame.id = WEBP_CHUNK_ANMF;
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);
}
} else {
ERROR_GOTO1("ERROR: Invalid subtype for 'frame'", Err2);
}
}
break;
case FEATURE_TILE:
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 tile;
ok = ReadFileToWebPData(feature->args_[index].filename_,
&tile.bitstream);
if (!ok) goto Err2;
ok = ParseTileArgs(feature->args_[index].params_, &tile);
if (!ok) {
WebPDataClear(&tile.bitstream);
ERROR_GOTO1("ERROR: Could not parse tile properties.\n", Err2);
}
tile.id = WEBP_CHUNK_FRGM;
err = WebPMuxPushFrame(mux, &tile, 1);
WebPDataClear(&tile.bitstream);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not add a tile at index %d.\n",
ErrorString(err), index, Err2);
}
}
break;
case FEATURE_ICCP:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = ReadFileToWebPData(feature->args_[0].filename_, &color_profile);
if (!ok) goto Err2;
err = WebPMuxSetChunk(mux, "ICCP", &color_profile, 1);
free((void*)color_profile.bytes);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not set color profile.\n",
ErrorString(err), Err2);
}
break;
case FEATURE_META:
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = ReadFileToWebPData(feature->args_[0].filename_, &metadata);
if (!ok) goto Err2;
err = WebPMuxSetChunk(mux, "META", &metadata, 1);
free((void*)metadata.bytes);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not set the metadata.\n",
ErrorString(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 = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
switch (feature->type_) {
case FEATURE_ICCP:
err = WebPMuxDeleteChunk(mux, "ICCP");
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not delete color profile.\n",
ErrorString(err), Err2);
}
break;
case FEATURE_META:
err = WebPMuxDeleteChunk(mux, "META");
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not delete the metadata.\n",
ErrorString(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 = 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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