// 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 #include #include #include #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 { // command line arguments int argc_; const char** argv_; WebPData argv_data_; int own_argv_; ActionType action_type_; const char* input_; const char* output_; FeatureType type_; FeatureArg* args_; int arg_count_; } Config; //------------------------------------------------------------------------------ // Helper functions. static int CountOccurrences(const Config* const config, const char* arg) { int i; int num_occurences = 0; for (i = 0; i < config->argc_; ++i) { if (!strcmp(config->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 ReadFileToWebPData(const char* const filename, WebPData* const webp_data) { const uint8_t* data; size_t size; if (!ImgIoUtilReadFile(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); 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_); if (config->own_argv_) { free((void*)config->argv_); WebPDataClear(&config->argv_data_); } memset(config, 0, sizeof(*config)); WebPDataInit(&config->argv_data_); } } //------------------------------------------------------------------------------ // 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 Config* const config, 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(config, "-get") > 1) { ERROR_GOTO1("ERROR: Multiple '-get' arguments specified.\n", ErrValidate); } if (CountOccurrences(config, "-set") > 1) { ERROR_GOTO1("ERROR: Multiple '-set' arguments specified.\n", ErrValidate); } if (CountOccurrences(config, "-strip") > 1) { ERROR_GOTO1("ERROR: Multiple '-strip' arguments specified.\n", ErrValidate); } if (CountOccurrences(config, "-info") > 1) { ERROR_GOTO1("ERROR: Multiple '-info' arguments specified.\n", ErrValidate); } if (CountOccurrences(config, "-o") > 1) { ERROR_GOTO1("ERROR: Multiple output files specified.\n", ErrValidate); } // Compound checks. num_frame_args = CountOccurrences(config, "-frame"); num_loop_args = CountOccurrences(config, "-loop"); num_bgcolor_args = CountOccurrences(config, "-bgcolor"); num_durations_args = CountOccurrences(config, "-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->argc_; const char* const* argv = config->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; } #define MAX_ARGC 16384 static int SetArguments(int argc, const char* argv[], Config* const config) { assert(config != NULL); memset(config, 0, sizeof(*config)); WebPDataInit(&config->argv_data_); if (argc == 1 && argv[0][0] != '-') { char* cur; const char sep[] = " \t\r\n\f\v"; if (!ReadFileToWebPData(argv[0], &config->argv_data_)) { return 0; } config->own_argv_ = 1; config->argv_ = (const char**)malloc(MAX_ARGC * sizeof(*config->argv_)); if (config->argv_ == NULL) return 0; argc = 0; for (cur = strtok((char*)config->argv_data_.bytes, sep); cur != NULL; cur = strtok(NULL, sep)) { if (argc == MAX_ARGC) { fprintf(stderr, "ERROR: Arguments limit %d reached\n", MAX_ARGC); return 0; } assert(strlen(cur) != 0); config->argv_[argc++] = cur; } config->argc_ = argc; } else { config->argc_ = argc; config->argv_ = argv; config->own_argv_ = 0; } return 1; } // 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 = SetArguments(argc, argv, config); if (!ok) return 0; // Validate command-line arguments. if (!ValidateCommandLine(config, &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 = ReadFileToWebPData(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 = ReadFileToWebPData(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; } //------------------------------------------------------------------------------