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- /*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "experimental/ffmpeg/SkVideoEncoder.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkStream.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTime.h"
- #include "modules/skottie/include/Skottie.h"
- #include "modules/skottie/utils/SkottieUtils.h"
- #include "src/utils/SkOSPath.h"
- #include "tools/flags/CommandLineFlags.h"
- static DEFINE_string2(input, i, "", "skottie animation to render");
- static DEFINE_string2(output, o, "", "mp4 file to create");
- static DEFINE_string2(assetPath, a, "", "path to assets needed for json file");
- static DEFINE_int_2(fps, f, 25, "fps");
- static DEFINE_bool2(verbose, v, false, "verbose mode");
- static DEFINE_bool2(loop, l, false, "loop mode for profiling");
- static DEFINE_double(motion_angle, 180, "motion blur angle");
- static DEFINE_double(motion_slope, 0, "motion blur slope");
- static DEFINE_int(motion_samples, 1, "motion blur samples");
- static void produce_frame(SkSurface* surf, skottie::Animation* anim, double frame_time) {
- anim->seekFrameTime(frame_time);
- surf->getCanvas()->clear(SK_ColorWHITE);
- anim->render(surf->getCanvas());
- }
- static void produce_frame(SkSurface* surf, SkSurface* tmp, skottie::Animation* anim,
- double frame_time, double frame_duration, double motion_radius,
- int motion_samples) {
- double samples_duration = frame_duration * motion_radius * 2;
- double dt = samples_duration / (motion_samples - 1);
- double t = frame_time - samples_duration / 2;
- SkPaint paint;
- paint.setAlphaf(1.0f / motion_samples);
- paint.setBlendMode(SkBlendMode::kPlus);
- surf->getCanvas()->clear(0);
- for (int i = 0; i < motion_samples; ++i) {
- if (FLAGS_verbose) {
- SkDebugf("time %g sample_time %g\n", frame_time, t);
- }
- produce_frame(tmp, anim, t);
- t += dt;
- tmp->draw(surf->getCanvas(), 0, 0, &paint);
- }
- }
- int main(int argc, char** argv) {
- CommandLineFlags::SetUsage("Converts skottie to a mp4");
- CommandLineFlags::Parse(argc, argv);
- if (FLAGS_input.count() == 0) {
- SkDebugf("-i input_file.json argument required\n");
- return -1;
- }
- if (FLAGS_motion_angle < 0 || FLAGS_motion_angle > 360) {
- SkDebugf("--motion_angle must be [0...360]\n");
- return -1;
- }
- if (FLAGS_motion_slope < -1 || FLAGS_motion_slope > 1) {
- SkDebugf("--motion_slope must be [-1...1]\n");
- return -1;
- }
- if (FLAGS_motion_samples < 1) {
- SkDebugf("--motion_samples must be >= 1\n");
- return -1;
- }
- // map angle=180 to radius=1/4 (of a frame duration)
- double motion_radius = FLAGS_motion_angle * 0.25 / 180.0;
- if (FLAGS_motion_samples == 1) {
- motion_radius = 0; // no blur if we're only 1 sample
- }
- SkString assetPath;
- if (FLAGS_assetPath.count() > 0) {
- assetPath.set(FLAGS_assetPath[0]);
- } else {
- assetPath = SkOSPath::Dirname(FLAGS_input[0]);
- }
- SkDebugf("assetPath %s\n", assetPath.c_str());
- auto animation = skottie::Animation::Builder()
- .setResourceProvider(skottie_utils::FileResourceProvider::Make(assetPath))
- .makeFromFile(FLAGS_input[0]);
- if (!animation) {
- SkDebugf("failed to load %s\n", FLAGS_input[0]);
- return -1;
- }
- SkISize dim = animation->size().toRound();
- double duration = animation->duration();
- int fps = FLAGS_fps;
- if (fps < 1) {
- fps = 1;
- } else if (fps > 240) {
- fps = 240;
- }
- const int frames = SkScalarRoundToInt(duration * fps);
- const double frame_duration = 1.0 / fps;
- if (FLAGS_verbose) {
- SkDebugf("size %dx%d duration %g, fps %d, frame_duration %g\n",
- dim.width(), dim.height(), duration, fps, frame_duration);
- }
- SkVideoEncoder encoder;
- sk_sp<SkSurface> surf, tmp_surf;
- sk_sp<SkData> data;
- do {
- double loop_start = SkTime::GetSecs();
- encoder.beginRecording(dim, fps);
- // lazily allocate the surfaces
- if (!surf) {
- surf = SkSurface::MakeRaster(encoder.preferredInfo());
- tmp_surf = surf->makeSurface(surf->width(), surf->height());
- }
- for (int i = 0; i <= frames; ++i) {
- double ts = i * 1.0 / fps;
- if (FLAGS_verbose) {
- SkDebugf("rendering frame %d ts %g\n", i, ts);
- }
- double normal_time = i * 1.0 / frames;
- double frame_time = normal_time * duration;
- if (motion_radius > 0) {
- produce_frame(surf.get(), tmp_surf.get(), animation.get(), frame_time, frame_duration,
- motion_radius, FLAGS_motion_samples);
- } else {
- produce_frame(surf.get(), animation.get(), frame_time);
- }
- SkPixmap pm;
- SkAssertResult(surf->peekPixels(&pm));
- encoder.addFrame(pm);
- }
- data = encoder.endRecording();
- if (FLAGS_loop) {
- double loop_dur = SkTime::GetSecs() - loop_start;
- SkDebugf("recording secs %g, frames %d, recording fps %d\n",
- loop_dur, frames, (int)(frames / loop_dur));
- }
- } while (FLAGS_loop);
- if (FLAGS_output.count() == 0) {
- SkDebugf("missing -o output_file.mp4 argument\n");
- return 0;
- }
- SkFILEWStream ostream(FLAGS_output[0]);
- if (!ostream.isValid()) {
- SkDebugf("Can't create output file %s\n", FLAGS_output[0]);
- return -1;
- }
- ostream.write(data->data(), data->size());
- return 0;
- }
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