// Copyright 2011 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Simple command-line to create a WebP container file and to extract or strip
// relevant data from the container file.
//
// Authors: Vikas (vikaas.arora@gmail.com),
// Urvang (urvang@google.com)
/* Usage examples:
Create container WebP file:
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 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
Change duration of frame intervals:
webpmux -duration 150 in.webp -o out.webp
webpmux -duration 33,2 in.webp -o out.webp
webpmux -duration 200,10,0 -duration 150,6,50 in.webp -o out.webp
Misc:
webpmux -info in.webp
webpmux [ -h | -help ]
webpmux -version
webpmux argument_file_name
*/
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "webp/decode.h"
#include "webp/mux.h"
#include "../examples/example_util.h"
#include "../imageio/imageio_util.h"
//------------------------------------------------------------------------------
// Config object to parse command-line arguments.
typedef enum {
NIL_ACTION = 0,
ACTION_GET,
ACTION_SET,
ACTION_STRIP,
ACTION_INFO,
ACTION_HELP,
ACTION_DURATION
} 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_DURATION,
LAST_FEATURE
} FeatureType;
static const char* const kFourccList[LAST_FEATURE] = {
NULL, "EXIF", "XMP ", "ICCP", "ANMF"
};
static const char* const kDescriptions[LAST_FEATURE] = {
NULL, "EXIF metadata", "XMP metadata", "ICC profile",
"Animation frame"
};
typedef struct {
CommandLineArguments cmd_args_;
ActionType action_type_;
const char* input_;
const char* output_;
FeatureType type_;
FeatureArg* args_;
int arg_count_;
} Config;
//------------------------------------------------------------------------------
// Helper functions.
static int CountOccurrences(const CommandLineArguments* const args,
const char* const arg) {
int i;
int num_occurences = 0;
for (i = 0; i < args->argc_; ++i) {
if (!strcmp(args->argv_[i], arg)) {
++num_occurences;
}
}
return num_occurences;
}
static const char* const kErrorMessages[-WEBP_MUX_NOT_ENOUGH_DATA + 1] = {
"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_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) {
int width, height;
uint32_t flag;
WebPMuxError err = WebPMuxGetCanvasSize(mux, &width, &height);
assert(err == WEBP_MUX_OK); // As WebPMuxCreate() was successful earlier.
printf("Canvas size: %d x %d\n", width, height);
err = WebPMuxGetFeatures(mux, &flag);
RETURN_IF_ERROR("Failed to retrieve features\n");
if (flag == 0) {
printf("No features present.\n");
return err;
}
// Print the features present.
printf("Features present:");
if (flag & ANIMATION_FLAG) printf(" animation");
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) {
const WebPChunkId id = WEBP_CHUNK_ANMF;
const char* const type_str = "frame";
int nFrames;
WebPMuxAnimParams params;
err = WebPMuxGetAnimationParams(mux, ¶ms);
assert(err == WEBP_MUX_OK);
printf("Background color : 0x%.8X Loop Count : %d\n",
params.bgcolor, params.loop_count);
err = WebPMuxNumChunks(mux, id, &nFrames);
assert(err == WEBP_MUX_OK);
printf("Number of %ss: %d\n", type_str, nFrames);
if (nFrames > 0) {
int i;
printf("No.: width height alpha x_offset y_offset ");
printf("duration dispose blend ");
printf("image_size compression\n");
for (i = 1; i <= nFrames; i++) {
WebPMuxFrameInfo frame;
err = WebPMuxGetFrame(mux, i, &frame);
if (err == WEBP_MUX_OK) {
WebPBitstreamFeatures features;
const VP8StatusCode status = WebPGetFeatures(
frame.bitstream.bytes, frame.bitstream.size, &features);
assert(status == VP8_STATUS_OK); // Checked by WebPMuxCreate().
(void)status;
printf("%3d: %5d %5d %5s %8d %8d ", i, features.width,
features.height, features.has_alpha ? "yes" : "no",
frame.x_offset, frame.y_offset);
{
const char* const dispose =
(frame.dispose_method == WEBP_MUX_DISPOSE_NONE) ? "none"
: "background";
const char* const blend =
(frame.blend_method == WEBP_MUX_BLEND) ? "yes" : "no";
printf("%8d %10s %5s ", frame.duration, dispose, blend);
}
printf("%10d %11s\n", (int)frame.bitstream.size,
(features.format == 1) ? "lossy" :
(features.format == 2) ? "lossless" :
"undefined");
}
WebPDataClear(&frame.bitstream);
RETURN_IF_ERROR3("Failed to retrieve %s#%d\n", type_str, i);
}
}
}
if (flag & ICCP_FLAG) {
WebPData icc_profile;
err = WebPMuxGetChunk(mux, "ICCP", &icc_profile);
assert(err == WEBP_MUX_OK);
printf("Size of the ICC profile data: %d\n", (int)icc_profile.size);
}
if (flag & EXIF_FLAG) {
WebPData exif;
err = WebPMuxGetChunk(mux, "EXIF", &exif);
assert(err == WEBP_MUX_OK);
printf("Size of the EXIF metadata: %d\n", (int)exif.size);
}
if (flag & XMP_FLAG) {
WebPData xmp;
err = WebPMuxGetChunk(mux, "XMP ", &xmp);
assert(err == WEBP_MUX_OK);
printf("Size of the XMP metadata: %d\n", (int)xmp.size);
}
if ((flag & ALPHA_FLAG) && !(flag & ANIMATION_FLAG)) {
WebPMuxFrameInfo image;
err = WebPMuxGetFrame(mux, 1, &image);
if (err == WEBP_MUX_OK) {
printf("Size of the image (with alpha): %d\n", (int)image.bitstream.size);
}
WebPDataClear(&image.bitstream);
RETURN_IF_ERROR("Failed to retrieve the image\n");
}
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 -duration DURATION_OPTIONS [-duration ...]\n");
printf(" INPUT -o OUTPUT\n");
printf(" webpmux -strip STRIP_OPTIONS INPUT -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(" webpmux -version\n");
printf(" webpmux argument_file_name\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(" 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("DURATION_OPTIONS:\n");
printf(" Set duration of selected frames:\n");
printf(" duration set duration for each frames\n");
printf(" duration,frame set duration of a particular frame\n");
printf(" duration,start,end set duration of frames in the\n");
printf(" interval [start,end])\n");
printf(" where: 'duration' is the duration in milliseconds\n");
printf(" 'start' is the start frame index\n");
printf(" 'end' is the inclusive end frame index\n");
printf(" The special 'end' value '0' means: last frame.\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("FRAME_OPTIONS(i):\n");
printf(" Create animation:\n");
printf(" file_i +di+[xi+yi[+mi[bi]]]\n");
printf(" where: 'file_i' is the i'th animation frame (WebP format),\n");
printf(" 'di' is the pause duration before next frame,\n");
printf(" 'xi','yi' specify the image offset for this frame,\n");
printf(" 'mi' is the dispose method for this frame (0 or 1),\n");
printf(" 'bi' is the blending method for this frame (+b or -b)"
"\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");
printf("\nNote: if a single file name is passed as the argument, the "
"arguments will be\n");
printf("tokenized from this file. The file name must not start with "
"the character '-'.\n");
}
static void WarnAboutOddOffset(const WebPMuxFrameInfo* const info) {
if ((info->x_offset | info->y_offset) & 1) {
fprintf(stderr, "Warning: odd offsets will be snapped to even values"
" (%d, %d) -> (%d, %d)\n", info->x_offset, info->y_offset,
info->x_offset & ~1, info->y_offset & ~1);
}
}
static int CreateMux(const char* const filename, WebPMux** mux) {
WebPData bitstream;
assert(mux != NULL);
if (!ExUtilReadFileToWebPData(filename, &bitstream)) return 0;
*mux = WebPMuxCreate(&bitstream, 1);
WebPDataClear(&bitstream);
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")
: ImgIoUtilSetBinaryMode(stdout);
if (fout == NULL) {
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, (int)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 WebPMux* DuplicateMuxHeader(const WebPMux* const mux) {
WebPMux* new_mux = WebPMuxNew();
WebPMuxAnimParams p;
WebPMuxError err;
int i;
int ok = 1;
if (new_mux == NULL) return NULL;
err = WebPMuxGetAnimationParams(mux, &p);
if (err == WEBP_MUX_OK) {
err = WebPMuxSetAnimationParams(new_mux, &p);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("Error (%s) handling animation params.\n",
ErrorString(err), End);
}
} else {
/* it might not be an animation. Just keep moving. */
}
for (i = 1; i <= 3; ++i) {
WebPData metadata;
err = WebPMuxGetChunk(mux, kFourccList[i], &metadata);
if (err == WEBP_MUX_OK && metadata.size > 0) {
err = WebPMuxSetChunk(new_mux, kFourccList[i], &metadata, 1);
if (err != WEBP_MUX_OK) {
ERROR_GOTO1("Error transferring metadata in DuplicateMux().", End);
}
}
}
End:
if (!ok) {
WebPMuxDelete(new_mux);
new_mux = NULL;
}
return new_mux;
}
static int ParseFrameArgs(const char* args, WebPMuxFrameInfo* const info) {
int dispose_method, dummy;
char plus_minus, blend_method;
const int num_args = sscanf(args, "+%d+%d+%d+%d%c%c+%d", &info->duration,
&info->x_offset, &info->y_offset, &dispose_method,
&plus_minus, &blend_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:
plus_minus = '+';
blend_method = 'b'; // fall through
case 6:
break;
case 2:
case 5:
default:
return 0;
}
WarnAboutOddOffset(info);
// Note: The sanity of the following conversion is checked by
// WebPMuxPushFrame().
info->dispose_method = (WebPMuxAnimDispose)dispose_method;
if (blend_method != 'b') return 0;
if (plus_minus != '-' && plus_minus != '+') return 0;
info->blend_method =
(plus_minus == '+') ? WEBP_MUX_BLEND : WEBP_MUX_NO_BLEND;
return 1;
}
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(Config* const config) {
if (config != NULL) {
free(config->args_);
ExUtilDeleteCommandLineArguments(&config->cmd_args_);
memset(config, 0, sizeof(*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(const CommandLineArguments* const cmd_args,
int* num_feature_args) {
int num_frame_args;
int num_loop_args;
int num_bgcolor_args;
int num_durations_args;
int ok = 1;
assert(num_feature_args != NULL);
*num_feature_args = 0;
// Simple checks.
if (CountOccurrences(cmd_args, "-get") > 1) {
ERROR_GOTO1("ERROR: Multiple '-get' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(cmd_args, "-set") > 1) {
ERROR_GOTO1("ERROR: Multiple '-set' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(cmd_args, "-strip") > 1) {
ERROR_GOTO1("ERROR: Multiple '-strip' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(cmd_args, "-info") > 1) {
ERROR_GOTO1("ERROR: Multiple '-info' arguments specified.\n", ErrValidate);
}
if (CountOccurrences(cmd_args, "-o") > 1) {
ERROR_GOTO1("ERROR: Multiple output files specified.\n", ErrValidate);
}
// Compound checks.
num_frame_args = CountOccurrences(cmd_args, "-frame");
num_loop_args = CountOccurrences(cmd_args, "-loop");
num_bgcolor_args = CountOccurrences(cmd_args, "-bgcolor");
num_durations_args = CountOccurrences(cmd_args, "-duration");
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_durations_args > 0 && num_frame_args != 0) {
ERROR_GOTO1("ERROR: Can not combine -duration and -frame commands.\n",
ErrValidate);
}
assert(ok == 1);
if (num_durations_args > 0) {
*num_feature_args = num_durations_args;
} else if (num_frame_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)
*num_feature_args = num_frame_args + num_loop_args + num_bgcolor_args;
}
ErrValidate:
return ok;
}
#define ACTION_IS_NIL (config->action_type_ == NIL_ACTION)
#define FEATURETYPE_IS_NIL (config->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(Config* config) {
int i = 0;
int feature_arg_index = 0;
int ok = 1;
int argc = config->cmd_args_.argc_;
const char* const* argv = config->cmd_args_.argv_;
while (i < argc) {
FeatureArg* const arg = &config->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], "-duration")) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
if (ACTION_IS_NIL || config->action_type_ == ACTION_DURATION) {
config->action_type_ = ACTION_DURATION;
} else {
ERROR_GOTO1("ERROR: Multiple actions specified.\n", ErrParse);
}
if (FEATURETYPE_IS_NIL || config->type_ == FEATURE_DURATION) {
config->type_ = FEATURE_DURATION;
} else {
ERROR_GOTO1("ERROR: Multiple features specified.\n", ErrParse);
}
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} 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;
config->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 || config->type_ == FEATURE_ANMF) {
config->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 || config->type_ == FEATURE_ANMF) {
config->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], "-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;
config->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 if (!strcmp(argv[i], "-version")) {
const int version = WebPGetMuxVersion();
printf("%d.%d.%d\n",
(version >> 16) & 0xff, (version >> 8) & 0xff, version & 0xff);
DeleteConfig(config);
exit(0);
} else if (!strcmp(argv[i], "--")) {
if (i < argc - 1) {
++i;
if (config->input_ == NULL) {
config->input_ = argv[i];
} else {
ERROR_GOTO2("ERROR at '%s': Multiple input files specified.\n",
argv[i], ErrParse);
}
}
break;
} 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) {
config->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") &&
(config->action_type_ == ACTION_GET)) {
CHECK_NUM_ARGS_LESS(2, ErrParse);
config->type_ = FEATURE_ANMF;
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(Config* const config) {
int ok = 1;
// 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 (config->type_ != FEATURE_ANMF) {
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[],
Config* const config) {
int num_feature_args = 0;
int ok;
memset(config, 0, sizeof(*config));
ok = ExUtilInitCommandLineArguments(argc, argv, &config->cmd_args_);
if (!ok) return 0;
// Validate command-line arguments.
if (!ValidateCommandLine(&config->cmd_args_, &num_feature_args)) {
ERROR_GOTO1("Exiting due to command-line parsing error.\n", Err1);
}
config->arg_count_ = num_feature_args;
config->args_ = (FeatureArg*)calloc(num_feature_args, sizeof(*config->args_));
if (config->args_ == NULL) {
ERROR_GOTO1("ERROR: Memory allocation error.\n", Err1);
}
// Parse command-line.
if (!ParseCommandLine(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 GetFrame(const WebPMux* mux, const Config* config) {
WebPMuxError err = WEBP_MUX_OK;
WebPMux* mux_single = NULL;
int num = 0;
int ok = 1;
int parse_error = 0;
const WebPChunkId id = WEBP_CHUNK_ANMF;
WebPMuxFrameInfo info;
WebPDataInit(&info.bitstream);
num = ExUtilGetInt(config->args_[0].params_, 10, &parse_error);
if (num < 0) {
ERROR_GOTO1("ERROR: Frame/Fragment index must be non-negative.\n", ErrGet);
}
if (parse_error) goto 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 %d.\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 && !parse_error;
}
// Read and process config.
static int Process(const Config* config) {
WebPMux* mux = NULL;
WebPData chunk;
WebPMuxError err = WEBP_MUX_OK;
int ok = 1;
switch (config->action_type_) {
case ACTION_GET: {
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
switch (config->type_) {
case FEATURE_ANMF:
ok = GetFrame(mux, config);
break;
case FEATURE_ICCP:
case FEATURE_EXIF:
case FEATURE_XMP:
err = WebPMuxGetChunk(mux, kFourccList[config->type_], &chunk);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not get the %s.\n",
ErrorString(err), kDescriptions[config->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 (config->type_) {
case FEATURE_ANMF: {
int i;
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 (i = 0; i < config->arg_count_; ++i) {
switch (config->args_[i].subtype_) {
case SUBTYPE_BGCOLOR: {
uint32_t bgcolor;
ok = ParseBgcolorArgs(config->args_[i].params_, &bgcolor);
if (!ok) {
ERROR_GOTO1("ERROR: Could not parse the background color \n",
Err2);
}
params.bgcolor = bgcolor;
break;
}
case SUBTYPE_LOOP: {
int parse_error = 0;
const int loop_count =
ExUtilGetInt(config->args_[i].params_, 10, &parse_error);
if (loop_count < 0 || loop_count > 65535) {
// 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);
}
ok = !parse_error;
if (!ok) goto Err2;
params.loop_count = loop_count;
break;
}
case SUBTYPE_ANMF: {
WebPMuxFrameInfo frame;
frame.id = WEBP_CHUNK_ANMF;
ok = ExUtilReadFileToWebPData(config->args_[i].filename_,
&frame.bitstream);
if (!ok) goto Err2;
ok = ParseFrameArgs(config->args_[i].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), i, Err2);
}
break;
}
default: {
ERROR_GOTO1("ERROR: Invalid subtype for 'frame'", Err2);
break;
}
}
}
err = WebPMuxSetAnimationParams(mux, ¶ms);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR (%s): Could not set animation parameters.\n",
ErrorString(err), Err2);
}
break;
}
case FEATURE_ICCP:
case FEATURE_EXIF:
case FEATURE_XMP: {
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = ExUtilReadFileToWebPData(config->args_[0].filename_, &chunk);
if (!ok) goto Err2;
err = WebPMuxSetChunk(mux, kFourccList[config->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[config->type_], Err2);
}
break;
}
default: {
ERROR_GOTO1("ERROR: Invalid feature for action 'set'.\n", Err2);
break;
}
}
ok = WriteWebP(mux, config->output_);
break;
}
case ACTION_DURATION: {
int num_frames;
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
err = WebPMuxNumChunks(mux, WEBP_CHUNK_ANMF, &num_frames);
ok = (err == WEBP_MUX_OK);
if (!ok) {
ERROR_GOTO1("ERROR: can not parse the number of frames.\n", Err2);
}
if (num_frames == 0) {
fprintf(stderr, "Doesn't look like the source is animated. "
"Skipping duration setting.\n");
ok = WriteWebP(mux, config->output_);
if (!ok) goto Err2;
} else {
int i;
int* durations = NULL;
WebPMux* new_mux = DuplicateMuxHeader(mux);
if (new_mux == NULL) goto Err2;
durations = (int*)malloc((size_t)num_frames * sizeof(*durations));
if (durations == NULL) goto Err2;
for (i = 0; i < num_frames; ++i) durations[i] = -1;
// Parse intervals to process.
for (i = 0; i < config->arg_count_; ++i) {
int k;
int args[3];
int duration, start, end;
const int nb_args = ExUtilGetInts(config->args_[i].params_,
10, 3, args);
ok = (nb_args >= 1);
if (!ok) goto Err3;
duration = args[0];
if (duration < 0) {
ERROR_GOTO1("ERROR: duration must be strictly positive.\n", Err3);
}
if (nb_args == 1) { // only duration is present -> use full interval
start = 1;
end = num_frames;
} else {
start = args[1];
if (start <= 0) {
start = 1;
} else if (start > num_frames) {
start = num_frames;
}
end = (nb_args >= 3) ? args[2] : start;
if (end == 0 || end > num_frames) end = num_frames;
}
for (k = start; k <= end; ++k) {
assert(k >= 1 && k <= num_frames);
durations[k - 1] = duration;
}
}
// Apply non-negative durations to their destination frames.
for (i = 1; i <= num_frames; ++i) {
WebPMuxFrameInfo frame;
err = WebPMuxGetFrame(mux, i, &frame);
if (err != WEBP_MUX_OK || frame.id != WEBP_CHUNK_ANMF) {
ERROR_GOTO2("ERROR: can not retrieve frame #%d.\n", i, Err3);
}
if (durations[i - 1] >= 0) frame.duration = durations[i - 1];
err = WebPMuxPushFrame(new_mux, &frame, 1);
if (err != WEBP_MUX_OK) {
ERROR_GOTO2("ERROR: error push frame data #%d\n", i, Err3);
}
WebPDataClear(&frame.bitstream);
}
WebPMuxDelete(mux);
ok = WriteWebP(new_mux, config->output_);
mux = new_mux; // transfer for the WebPMuxDelete() call
new_mux = NULL;
Err3:
free(durations);
WebPMuxDelete(new_mux);
if (!ok) goto Err2;
}
break;
}
case ACTION_STRIP: {
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
if (config->type_ == FEATURE_ICCP || config->type_ == FEATURE_EXIF ||
config->type_ == FEATURE_XMP) {
err = WebPMuxDeleteChunk(mux, kFourccList[config->type_]);
if (err != WEBP_MUX_OK) {
ERROR_GOTO3("ERROR (%s): Could not strip the %s.\n",
ErrorString(err), kDescriptions[config->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[]) {
Config config;
int ok = InitializeConfig(argc - 1, argv + 1, &config);
if (ok) {
ok = Process(&config);
} else {
PrintHelp();
}
DeleteConfig(&config);
return !ok;
}
//------------------------------------------------------------------------------