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// Copyright 2016 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.
// -----------------------------------------------------------------------------
//
// generate an animated WebP out of a sequence of images
// (PNG, JPEG, ...)
//
// Example usage:
// img2webp -o out.webp -q 40 -mixed -duration 40 input??.png
//
// Author: skal@google.com (Pascal Massimino)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include "../examples/example_util.h"
#include "../imageio/image_dec.h"
#include "../imageio/imageio_util.h"
#include "./stopwatch.h"
#include "webp/encode.h"
#include "webp/mux.h"
//------------------------------------------------------------------------------
static void Help(void) {
printf("Usage:\n\n");
printf(" img2webp [file-level options] [image files...] "
"[per-frame options...]\n");
printf("\n");
printf("File-level options (only used at the start of compression):\n");
printf(" -min_size ............ minimize size\n");
printf(" -loop <int> .......... loop count (default: 0, = infinite loop)\n");
printf(" -kmax <int> .......... maximum number of frame between key-frames\n"
" (0=only keyframes)\n");
printf(" -kmin <int> .......... minimum number of frame between key-frames\n"
" (0=disable key-frames altogether)\n");
printf(" -mixed ............... use mixed lossy/lossless automatic mode\n");
printf(" -v ................... verbose mode\n");
printf(" -h ................... this help\n");
printf(" -version ............. print version number and exit\n");
printf("\n");
printf("Per-frame options (only used for subsequent images input):\n");
printf(" -d <int> ............. frame duration in ms (default: 100)\n");
printf(" -lossless ........... use lossless mode (default)\n");
printf(" -lossy ... ........... use lossy mode\n");
printf(" -q <float> ........... quality\n");
printf(" -m <int> ............. method to use\n");
printf("\n");
printf("example: img2webp -loop 2 in0.png -lossy in1.jpg\n"
" -d 80 in2.tiff -o out.webp\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 int ReadImage(const char filename[], WebPPicture* const pic) {
const uint8_t* data = NULL;
size_t data_size = 0;
WebPImageReader reader;
int ok;
#ifdef HAVE_WINCODEC_H
// Try to decode the file using WIC falling back to the other readers for
// e.g., WebP.
ok = ReadPictureWithWIC(filename, pic, 1, NULL);
if (ok) return 1;
#endif
if (!ImgIoUtilReadFile(filename, &data, &data_size)) return 0;
reader = WebPGuessImageReader(data, data_size);
ok = reader(data, data_size, pic, 1, NULL);
free((void*)data);
return ok;
}
static int SetLoopCount(int loop_count, WebPData* const webp_data) {
int ok = 1;
WebPMuxError err;
uint32_t features;
WebPMuxAnimParams new_params;
WebPMux* const mux = WebPMuxCreate(webp_data, 1);
if (mux == NULL) return 0;
err = WebPMuxGetFeatures(mux, &features);
ok = (err == WEBP_MUX_OK);
if (!ok || !(features & ANIMATION_FLAG)) goto End;
err = WebPMuxGetAnimationParams(mux, &new_params);
ok = (err == WEBP_MUX_OK);
if (ok) {
new_params.loop_count = loop_count;
err = WebPMuxSetAnimationParams(mux, &new_params);
ok = (err == WEBP_MUX_OK);
}
if (ok) {
WebPDataClear(webp_data);
err = WebPMuxAssemble(mux, webp_data);
ok = (err == WEBP_MUX_OK);
}
End:
WebPMuxDelete(mux);
if (!ok) {
fprintf(stderr, "Error during loop-count setting\n");
}
return ok;
}
//------------------------------------------------------------------------------
int main(int argc, const char* argv[]) {
const char* output = NULL;
WebPAnimEncoder* enc = NULL;
int verbose = 0;
int pic_num = 0;
int duration = 100;
int timestamp_ms = 0;
int loop_count = 0;
int width = 0, height = 0;
WebPAnimEncoderOptions anim_config;
WebPConfig config;
WebPPicture pic;
WebPData webp_data;
int c;
int have_input = 0;
CommandLineArguments cmd_args;
int ok = ExUtilInitCommandLineArguments(argc - 1, argv + 1, &cmd_args);
if (!ok) return 1;
argc = cmd_args.argc_;
argv = cmd_args.argv_;
WebPDataInit(&webp_data);
if (!WebPAnimEncoderOptionsInit(&anim_config) ||
!WebPConfigInit(&config) ||
!WebPPictureInit(&pic)) {
fprintf(stderr, "Library version mismatch!\n");
ok = 0;
goto End;
}
// 1st pass of option parsing
for (c = 0; ok && c < argc; ++c) {
if (argv[c][0] == '-') {
int parse_error = 0;
if (!strcmp(argv[c], "-o") && c + 1 < argc) {
argv[c] = NULL;
output = argv[++c];
} else if (!strcmp(argv[c], "-kmin") && c + 1 < argc) {
argv[c] = NULL;
anim_config.kmin = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-kmax") && c + 1 < argc) {
argv[c] = NULL;
anim_config.kmax = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-loop") && c + 1 < argc) {
argv[c] = NULL;
loop_count = ExUtilGetInt(argv[++c], 0, &parse_error);
if (loop_count < 0) {
fprintf(stderr, "Invalid non-positive loop-count (%d)\n", loop_count);
parse_error = 1;
}
} else if (!strcmp(argv[c], "-min_size")) {
anim_config.minimize_size = 1;
} else if (!strcmp(argv[c], "-mixed")) {
anim_config.allow_mixed = 1;
config.lossless = 0;
} else if (!strcmp(argv[c], "-v")) {
verbose = 1;
} else if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
Help();
goto End;
} else if (!strcmp(argv[c], "-version")) {
const int enc_version = WebPGetEncoderVersion();
const int mux_version = WebPGetMuxVersion();
printf("WebP Encoder version: %d.%d.%d\nWebP Mux version: %d.%d.%d\n",
(enc_version >> 16) & 0xff, (enc_version >> 8) & 0xff,
enc_version & 0xff, (mux_version >> 16) & 0xff,
(mux_version >> 8) & 0xff, mux_version & 0xff);
goto End;
} else {
continue;
}
ok = !parse_error;
if (!ok) goto End;
argv[c] = NULL; // mark option as 'parsed' during 1st pass
} else {
have_input |= 1;
}
}
if (!have_input) {
fprintf(stderr, "No input file(s) for generating animation!\n");
goto End;
}
// image-reading pass
pic_num = 0;
config.lossless = 1;
for (c = 0; ok && c < argc; ++c) {
if (argv[c] == NULL) continue;
if (argv[c][0] == '-') { // parse local options
int parse_error = 0;
if (!strcmp(argv[c], "-lossy")) {
if (!anim_config.allow_mixed) config.lossless = 0;
} else if (!strcmp(argv[c], "-lossless")) {
if (!anim_config.allow_mixed) config.lossless = 1;
} else if (!strcmp(argv[c], "-q") && c + 1 < argc) {
config.quality = ExUtilGetFloat(argv[++c], &parse_error);
} else if (!strcmp(argv[c], "-m") && c + 1 < argc) {
config.method = ExUtilGetInt(argv[++c], 0, &parse_error);
} else if (!strcmp(argv[c], "-d") && c + 1 < argc) {
duration = ExUtilGetInt(argv[++c], 0, &parse_error);
if (duration <= 0) {
fprintf(stderr, "Invalid negative duration (%d)\n", duration);
parse_error = 1;
}
} else {
parse_error = 1; // shouldn't be here.
fprintf(stderr, "Unknown option [%s]\n", argv[c]);
}
ok = !parse_error;
if (!ok) goto End;
continue;
}
if (ok) {
ok = WebPValidateConfig(&config);
if (!ok) {
fprintf(stderr, "Invalid configuration.\n");
goto End;
}
}
// read next input image
pic.use_argb = 1;
ok = ReadImage(argv[c], &pic);
if (!ok) goto End;
if (enc == NULL) {
width = pic.width;
height = pic.height;
enc = WebPAnimEncoderNew(width, height, &anim_config);
ok = (enc != NULL);
if (!ok) {
fprintf(stderr, "Could not create WebPAnimEncoder object.\n");
}
}
if (ok) {
ok = (width == pic.width && height == pic.height);
if (!ok) {
fprintf(stderr, "Frame #%d dimension mismatched! "
"Got %d x %d. Was expecting %d x %d.\n",
pic_num, pic.width, pic.height, width, height);
}
}
if (ok) {
ok = WebPAnimEncoderAdd(enc, &pic, timestamp_ms, &config);
if (!ok) {
fprintf(stderr, "Error while adding frame #%d\n", pic_num);
}
}
WebPPictureFree(&pic);
if (!ok) goto End;
if (verbose) {
fprintf(stderr, "Added frame #%3d at time %4d (file: %s)\n",
pic_num, timestamp_ms, argv[c]);
}
timestamp_ms += duration;
++pic_num;
}
// add a last fake frame to signal the last duration
ok = ok && WebPAnimEncoderAdd(enc, NULL, timestamp_ms, NULL);
ok = ok && WebPAnimEncoderAssemble(enc, &webp_data);
if (!ok) {
fprintf(stderr, "Error during final animation assembly.\n");
}
End:
// free resources
WebPAnimEncoderDelete(enc);
if (ok && loop_count > 0) { // Re-mux to add loop count.
ok = SetLoopCount(loop_count, &webp_data);
}
if (ok) {
if (output != NULL) {
ok = ImgIoUtilWriteFile(output, webp_data.bytes, webp_data.size);
if (ok) fprintf(stderr, "output file: %s ", output);
} else {
fprintf(stderr, "[no output file specified] ");
}
}
if (ok) {
fprintf(stderr, "[%d frames, %u bytes].\n",
pic_num, (unsigned int)webp_data.size);
}
WebPDataClear(&webp_data);
ExUtilDeleteCommandLineArguments(&cmd_args);
return ok ? 0 : 1;
}