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skia2/tools/viewer/SkottieSlide.cpp
Florin Malita cc01311cfc [skottie] Add audio track support to viewer 
Based on SkAudioPlayer, Mac-only for now.

Change-Id: Ic4b0e2814aa341586634cbd270d7afd90e32716b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/310056
Commit-Queue: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2020-08-13 17:04:12 +00:00

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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "tools/viewer/SkottieSlide.h"
#if defined(SK_ENABLE_SKOTTIE)
#include "include/core/SkCanvas.h"
#include "include/core/SkFont.h"
#include "include/core/SkTime.h"
#include "include/ports/SkAudioPlayer.h"
#include "modules/skottie/include/Skottie.h"
#include "modules/skottie/utils/SkottieUtils.h"
#include "modules/skresources/include/SkResources.h"
#include "src/utils/SkOSPath.h"
#include "tools/timer/TimeUtils.h"
#include <cmath>
#include "imgui.h"
namespace {
class Track final : public skresources::ExternalTrackAsset {
public:
explicit Track(std::unique_ptr<SkAudioPlayer> player) : fPlayer(std::move(player)) {}
private:
void seek(float t) override {
if (fPlayer->isStopped() && t >=0) {
fPlayer->play();
}
if (fPlayer->isPlaying()) {
if (t < 0) {
fPlayer->stop();
} else {
static constexpr float kTolerance = 0.075f;
const auto player_pos = fPlayer->time();
if (std::abs(player_pos - t) > kTolerance) {
fPlayer->setTime(t);
}
}
}
}
const std::unique_ptr<SkAudioPlayer> fPlayer;
};
class AudioProviderProxy final : public skresources::ResourceProviderProxyBase {
public:
explicit AudioProviderProxy(sk_sp<skresources::ResourceProvider> rp)
: INHERITED(std::move(rp)) {}
private:
sk_sp<skresources::ExternalTrackAsset> loadAudioAsset(const char path[],
const char name[],
const char[] /*id*/) override {
if (auto data = this->load(path, name)) {
if (auto player = SkAudioPlayer::Make(std::move(data))) {
return sk_make_sp<Track>(std::move(player));
}
}
return nullptr;
}
using INHERITED = skresources::ResourceProviderProxyBase;
};
} // namespace
static void draw_stats_box(SkCanvas* canvas, const skottie::Animation::Builder::Stats& stats) {
static constexpr SkRect kR = { 10, 10, 280, 120 };
static constexpr SkScalar kTextSize = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xffeeeeee);
SkFont font(nullptr, kTextSize);
canvas->drawRect(kR, paint);
paint.setColor(SK_ColorBLACK);
const auto json_size = SkStringPrintf("Json size: %zu bytes",
stats.fJsonSize);
canvas->drawString(json_size, kR.x() + 10, kR.y() + kTextSize * 1, font, paint);
const auto animator_count = SkStringPrintf("Animator count: %zu",
stats.fAnimatorCount);
canvas->drawString(animator_count, kR.x() + 10, kR.y() + kTextSize * 2, font, paint);
const auto json_parse_time = SkStringPrintf("Json parse time: %.3f ms",
stats.fJsonParseTimeMS);
canvas->drawString(json_parse_time, kR.x() + 10, kR.y() + kTextSize * 3, font, paint);
const auto scene_parse_time = SkStringPrintf("Scene build time: %.3f ms",
stats.fSceneParseTimeMS);
canvas->drawString(scene_parse_time, kR.x() + 10, kR.y() + kTextSize * 4, font, paint);
const auto total_load_time = SkStringPrintf("Total load time: %.3f ms",
stats.fTotalLoadTimeMS);
canvas->drawString(total_load_time, kR.x() + 10, kR.y() + kTextSize * 5, font, paint);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(kR, paint);
}
SkottieSlide::SkottieSlide(const SkString& name, const SkString& path)
: fPath(path) {
fName = name;
}
void SkottieSlide::load(SkScalar w, SkScalar h) {
class Logger final : public skottie::Logger {
public:
struct LogEntry {
SkString fMessage,
fJSON;
};
void log(skottie::Logger::Level lvl, const char message[], const char json[]) override {
auto& log = lvl == skottie::Logger::Level::kError ? fErrors : fWarnings;
log.push_back({ SkString(message), json ? SkString(json) : SkString() });
}
void report() const {
SkDebugf("Animation loaded with %lu error%s, %lu warning%s.\n",
fErrors.size(), fErrors.size() == 1 ? "" : "s",
fWarnings.size(), fWarnings.size() == 1 ? "" : "s");
const auto& show = [](const LogEntry& log, const char prefix[]) {
SkDebugf("%s%s", prefix, log.fMessage.c_str());
if (!log.fJSON.isEmpty())
SkDebugf(" : %s", log.fJSON.c_str());
SkDebugf("\n");
};
for (const auto& err : fErrors) show(err, " !! ");
for (const auto& wrn : fWarnings) show(wrn, " ?? ");
}
private:
std::vector<LogEntry> fErrors,
fWarnings;
};
auto logger = sk_make_sp<Logger>();
uint32_t flags = 0;
if (fPreferGlyphPaths) {
flags |= skottie::Animation::Builder::kPreferEmbeddedFonts;
}
skottie::Animation::Builder builder(flags);
auto resource_provider =
sk_make_sp<AudioProviderProxy>(
skresources::DataURIResourceProviderProxy::Make(
skresources::FileResourceProvider::Make(SkOSPath::Dirname(fPath.c_str()),
/*predecode=*/true),
/*predecode=*/true));
static constexpr char kInterceptPrefix[] = "__";
auto precomp_interceptor =
sk_make_sp<skottie_utils::ExternalAnimationPrecompInterceptor>(resource_provider,
kInterceptPrefix);
fAnimation = builder
.setLogger(logger)
.setResourceProvider(std::move(resource_provider))
.setPrecompInterceptor(std::move(precomp_interceptor))
.makeFromFile(fPath.c_str());
fAnimationStats = builder.getStats();
fWinSize = SkSize::Make(w, h);
fTimeBase = 0; // force a time reset
if (fAnimation) {
fAnimation->seek(0);
fFrameTimes.resize(SkScalarCeilToInt(fAnimation->duration() * fAnimation->fps()));
SkDebugf("Loaded Bodymovin animation v: %s, size: [%f %f]\n",
fAnimation->version().c_str(),
fAnimation->size().width(),
fAnimation->size().height());
logger->report();
} else {
SkDebugf("failed to load Bodymovin animation: %s\n", fPath.c_str());
}
}
void SkottieSlide::unload() {
fAnimation.reset();
}
void SkottieSlide::resize(SkScalar w, SkScalar h) {
fWinSize = { w, h };
}
SkISize SkottieSlide::getDimensions() const {
// We always scale to fill the window.
return fWinSize.toCeil();
}
void SkottieSlide::draw(SkCanvas* canvas) {
if (fAnimation) {
SkAutoCanvasRestore acr(canvas, true);
const auto dstR = SkRect::MakeSize(fWinSize);
{
const auto t0 = SkTime::GetNSecs();
fAnimation->render(canvas, &dstR);
// TODO: this does not capture GPU flush time!
const auto frame_index = static_cast<size_t>(fCurrentFrame);
fFrameTimes[frame_index] = static_cast<float>((SkTime::GetNSecs() - t0) * 1e-6);
}
if (fShowAnimationStats) {
draw_stats_box(canvas, fAnimationStats);
}
if (fShowAnimationInval) {
const auto t = SkMatrix::MakeRectToRect(SkRect::MakeSize(fAnimation->size()),
dstR,
SkMatrix::kCenter_ScaleToFit);
SkPaint fill, stroke;
fill.setAntiAlias(true);
fill.setColor(0x40ff0000);
stroke.setAntiAlias(true);
stroke.setColor(0xffff0000);
stroke.setStyle(SkPaint::kStroke_Style);
for (const auto& r : fInvalController) {
SkRect bounds;
t.mapRect(&bounds, r);
canvas->drawRect(bounds, fill);
canvas->drawRect(bounds, stroke);
}
}
if (fShowUI) {
this->renderUI();
}
}
}
bool SkottieSlide::animate(double nanos) {
if (!fTimeBase) {
// Reset the animation time.
fTimeBase = nanos;
}
if (fAnimation) {
fInvalController.reset();
const auto frame_count = fAnimation->duration() * fAnimation->fps();
if (!fDraggingProgress) {
// Clock-driven progress: update current frame.
const double t_sec = (nanos - fTimeBase) * 1e-9;
fCurrentFrame = std::fmod(t_sec * fAnimation->fps(), frame_count);
} else {
// Slider-driven progress: update the time origin.
fTimeBase = nanos - fCurrentFrame / fAnimation->fps() * 1e9;
}
// Sanitize and rate-lock the current frame.
fCurrentFrame = SkTPin<float>(fCurrentFrame, 0.0f, frame_count - 1);
if (fFrameRate > 0) {
const auto fps_scale = fFrameRate / fAnimation->fps();
fCurrentFrame = std::trunc(fCurrentFrame * fps_scale) / fps_scale;
}
fAnimation->seekFrame(fCurrentFrame, fShowAnimationInval ? &fInvalController
: nullptr);
}
return true;
}
bool SkottieSlide::onChar(SkUnichar c) {
switch (c) {
case 'I':
fShowAnimationStats = !fShowAnimationStats;
return true;
case 'G':
fPreferGlyphPaths = !fPreferGlyphPaths;
this->load(fWinSize.width(), fWinSize.height());
return true;
}
return INHERITED::onChar(c);
}
bool SkottieSlide::onMouse(SkScalar x, SkScalar y, skui::InputState state, skui::ModifierKey) {
switch (state) {
case skui::InputState::kUp:
fShowAnimationInval = !fShowAnimationInval;
fShowAnimationStats = !fShowAnimationStats;
break;
default:
break;
}
fShowUI = this->UIArea().contains(x, y);
return false;
}
SkRect SkottieSlide::UIArea() const {
static constexpr float kUIHeight = 120.0f;
return SkRect::MakeXYWH(0, fWinSize.height() - kUIHeight, fWinSize.width(), kUIHeight);
}
void SkottieSlide::renderUI() {
static constexpr auto kUI_opacity = 0.35f,
kUI_hist_height = 50.0f,
kUI_fps_width = 100.0f;
auto add_frame_rate_option = [this](const char* label, double rate) {
const auto is_selected = (fFrameRate == rate);
if (ImGui::Selectable(label, is_selected)) {
fFrameRate = rate;
fFrameRateLabel = label;
}
if (is_selected) {
ImGui::SetItemDefaultFocus();
}
};
ImGui::SetNextWindowBgAlpha(kUI_opacity);
if (ImGui::Begin("Skottie Controls", nullptr, ImGuiWindowFlags_NoDecoration |
ImGuiWindowFlags_NoResize |
ImGuiWindowFlags_NoMove |
ImGuiWindowFlags_NoSavedSettings |
ImGuiWindowFlags_NoFocusOnAppearing |
ImGuiWindowFlags_NoNav)) {
const auto ui_area = this->UIArea();
ImGui::SetWindowPos(ImVec2(ui_area.x(), ui_area.y()));
ImGui::SetWindowSize(ImVec2(ui_area.width(), ui_area.height()));
ImGui::PushItemWidth(-1);
ImGui::PlotHistogram("", fFrameTimes.data(), fFrameTimes.size(),
0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, kUI_hist_height));
ImGui::SliderFloat("", &fCurrentFrame, 0, fAnimation->duration() * fAnimation->fps() - 1);
fDraggingProgress = ImGui::IsItemActive();
ImGui::PopItemWidth();
ImGui::PushItemWidth(kUI_fps_width);
if (ImGui::BeginCombo("FPS", fFrameRateLabel)) {
add_frame_rate_option("", 0.0);
add_frame_rate_option("Native", fAnimation->fps());
add_frame_rate_option( "1", 1.0);
add_frame_rate_option("15", 15.0);
add_frame_rate_option("24", 24.0);
add_frame_rate_option("30", 30.0);
add_frame_rate_option("60", 60.0);
ImGui::EndCombo();
}
ImGui::PopItemWidth();
}
ImGui::End();
}
#endif // SK_ENABLE_SKOTTIE
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