1/*
2 * Copyright 2020 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "include/core/SkCanvas.h"
9#include "include/core/SkData.h"
10#include "modules/audioplayer/SkAudioPlayer.h"
11#include "samplecode/Sample.h"
12#include "src/core/SkUtils.h"
13#include "tools/Resources.h"
14
15class AudioView : public Sample {
16    std::unique_ptr<SkAudioPlayer> fPlayer;
17    SkRect                         fBar;
18
19public:
20    AudioView() {}
21
22protected:
23    SkString name() override { return SkString("Audio"); }
24
25    void onOnceBeforeDraw() override {
26        auto data = SkData::MakeFromFileName("/Users/reed/skia/mp3/scott-joplin-peacherine-rag.mp3");
27        if (data) {
28            fPlayer = SkAudioPlayer::Make(data);
29
30            SkDebugf("make: dur:%g time%g state:%d",
31                     fPlayer->duration(),
32                     fPlayer->time(),
33                     (int)fPlayer->state());
34        }
35
36        fBar = { 10, 10, 510, 30 };
37    }
38
39    void onDrawContent(SkCanvas* canvas) override {
40        if (!fPlayer) {
41            return;
42        }
43
44        SkPaint p;
45        p.setColor(0xFFCCCCCC);
46        canvas->drawRect(fBar, p);
47
48        p.setColor(fPlayer->isPlaying() ? SK_ColorBLUE : 0xFF8888FF);
49        SkRect r = fBar;
50        r.fRight = r.fLeft + (float)fPlayer->normalizedTime() * r.width();
51        canvas->drawRect(r, p);
52    }
53
54    bool onChar(SkUnichar c) override {
55        if (c == ' ') {
56            switch (fPlayer->state()) {
57                case SkAudioPlayer::State::kPlaying: fPlayer->pause(); break;
58                case SkAudioPlayer::State::kPaused:  fPlayer->play(); break;
59                case SkAudioPlayer::State::kStopped: fPlayer->play(); break;
60            }
61            return true;
62        }
63        return this->INHERITED::onChar(c);
64    }
65
66    Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey) override {
67        if (fPlayer && fBar.contains(x, y)) {
68            bool wasPlaying = fPlayer->isPlaying();
69            if (wasPlaying) {
70                fPlayer->pause();
71            }
72            return new Click([this, wasPlaying](Click* click) {
73                if (fBar.contains(click->fCurr.fX, click->fCurr.fY)) {
74                    fPlayer->setNormalizedTime((click->fCurr.fX - fBar.fLeft) / fBar.width());
75                }
76
77                if (click->fState == skui::InputState::kUp) {
78                    if (wasPlaying) {
79                        fPlayer->play();
80                    }
81                }
82                return true;
83            });
84        }
85        return nullptr;
86    }
87
88    bool onAnimate(double /*nanos*/) override {
89        return true;
90    }
91
92private:
93    using INHERITED = Sample;
94};
95DEF_SAMPLE( return new AudioView; )
96