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anim_dump: small tool to dump frames from animated WebP
dumps frames to PNG, PAM or TIFF files. Change-Id: I86a4d7e235cb7040cf5bbcae28270cb5a84be087
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,104 @@ | ||
| // Copyright 2017 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. | ||
| // ----------------------------------------------------------------------------- | ||
| // | ||
| // Decodes an animated WebP file and dumps the decoded frames as PNG or TIFF. | ||
| // | ||
| // Author: Skal ([email protected]) | ||
|
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| #include <stdio.h> | ||
| #include <string.h> // for 'strcmp'. | ||
|
|
||
| #include "./anim_util.h" | ||
| #include "webp/decode.h" | ||
| #include "../imageio/image_enc.h" | ||
|
|
||
| #if defined(_MSC_VER) && _MSC_VER < 1900 | ||
| #define snprintf _snprintf | ||
| #endif | ||
|
|
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| static void Help(void) { | ||
| printf("Usage: anim_dump [options] files...\n"); | ||
| printf("\nOptions:\n"); | ||
| printf(" -folder <string> .... dump folder (default: '.')\n"); | ||
| printf(" -prefix <string> .... prefix for dumped frames " | ||
| "(default: 'dump_')\n"); | ||
| printf(" -tiff ............... save frames as TIFF\n"); | ||
| printf(" -pam ................ save frames as PAM\n"); | ||
| } | ||
|
|
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| int main(int argc, const char* argv[]) { | ||
| int error = 0; | ||
| const char* dump_folder = "."; | ||
| const char* prefix = "dump_"; | ||
| const char* suffix = "png"; | ||
| WebPOutputFileFormat format = PNG; | ||
| int c; | ||
|
|
||
| if (argc < 2) { | ||
| Help(); | ||
| return -1; | ||
| } | ||
|
|
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| for (c = 1; !error && c < argc; ++c) { | ||
| if (!strcmp(argv[c], "-folder")) { | ||
| if (c + 1 == argc) { | ||
| fprintf(stderr, "missing argument after option '%s'\n", argv[c]); | ||
| error = 1; | ||
| break; | ||
| } | ||
| dump_folder = argv[++c]; | ||
| } else if (!strcmp(argv[c], "-prefix")) { | ||
| if (c + 1 == argc) { | ||
| fprintf(stderr, "missing argument after option '%s'\n", argv[c]); | ||
| error = 1; | ||
| break; | ||
| } | ||
| prefix = argv[++c]; | ||
| } else if (!strcmp(argv[c], "-tiff")) { | ||
| format = TIFF; | ||
| suffix = "tiff"; | ||
| } else if (!strcmp(argv[c], "-pam")) { | ||
| format = PAM; | ||
| suffix = "pam"; | ||
| } else { | ||
| uint32_t i; | ||
| AnimatedImage image; | ||
| const char* const file = argv[c]; | ||
| memset(&image, 0, sizeof(image)); | ||
| printf("Decoding file: %s as %s/%sxxxx.%s\n", | ||
| file, dump_folder, prefix, suffix); | ||
| if (!ReadAnimatedImage(file, &image, 0, NULL)) { | ||
| fprintf(stderr, "Error decoding file: %s\n Aborting.\n", file); | ||
| error = 1; | ||
| break; | ||
| } | ||
| for (i = 0; !error && i < image.num_frames; ++i) { | ||
| char out_file[1024]; | ||
| WebPDecBuffer buffer; | ||
| WebPInitDecBuffer(&buffer); | ||
| buffer.colorspace = MODE_RGBA; | ||
| buffer.is_external_memory = 1; | ||
| buffer.width = image.canvas_width; | ||
| buffer.height = image.canvas_height; | ||
| buffer.u.RGBA.rgba = image.frames[i].rgba; | ||
| buffer.u.RGBA.stride = buffer.width * sizeof(uint32_t); | ||
| buffer.u.RGBA.size = buffer.u.RGBA.stride * buffer.height; | ||
| snprintf(out_file, sizeof(out_file), "%s/%s%.4d.%s", | ||
| dump_folder, prefix, i, suffix); | ||
| if (!WebPSaveImage(&buffer, format, out_file)) { | ||
| fprintf(stderr, "Error while saving image '%s'\n", out_file); | ||
| error = 1; | ||
| } | ||
| WebPFreeDecBuffer(&buffer); | ||
| } | ||
| ClearAnimatedImage(&image); | ||
| } | ||
| } | ||
| return error ? 1 : 0; | ||
| } |
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