Source/platform/audio/chromium/AudioBusChromium.cpp - Issue 100993004: Move chrome specific code from platform/audio/chromium to platform/audio

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Issue 100993004: Move chrome specific code from platform/audio/chromium to platform/audio (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: fixed atreat review commets Created 7 years ago

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1 /*

2 * Copyright (C) 2010, Google Inc. All rights reserved.

3 *

4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions

6 * are met:

7 * 1. Redistributions of source code must retain the above copyright

8 * notice, this list of conditions and the following disclaimer.

9 * 2. Redistributions in binary form must reproduce the above copyright

10 * notice, this list of conditions and the following disclaimer in the

11 * documentation and/or other materials provided with the distribution.

12 *

13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN Y

14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN Y

17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O N

20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

23 */

24

25 #include "config.h"

26

27 #if ENABLE(WEB_AUDIO)

28

29 #include "platform/audio/AudioFileReader.h"

30

31 #include "platform/audio/AudioBus.h"

32 #include "public/platform/Platform.h"

33 #include "public/platform/WebAudioBus.h"

34

35 namespace WebCore {

36

37 PassRefPtr<AudioBus> decodeAudioFileData(const char* data, size_t size, double s ampleRate)

38 {

39 blink::WebAudioBus webAudioBus;

40 if (blink::Platform::current()->loadAudioResource(&webAudioBus, data, size, sampleRate))

41 return webAudioBus.release();

42 return 0;

43 }

44

45 PassRefPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, float samp leRate)

46 {

47 const blink::WebData& resource = blink::Platform::current()->loadResource(na me);

48 if (resource.isEmpty())

49 return 0;

50

51 // FIXME: the sampleRate parameter is ignored. It should be removed from the API.

52 RefPtr<AudioBus> audioBus = decodeAudioFileData(resource.data(), resource.si ze(), sampleRate);

53

54 if (!audioBus.get())

55 return 0;

56

57 // If the bus is already at the requested sample-rate then return as is.

58 if (audioBus->sampleRate() == sampleRate)

59 return audioBus;

60

61 return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleR ate);

62 }

63

64 PassRefPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dat aSize, bool mixToMono, float sampleRate)

65 {

66 // FIXME: the sampleRate parameter is ignored. It should be removed from the API.

67 RefPtr<AudioBus> audioBus = decodeAudioFileData(static_cast<const char*>(dat a), dataSize, sampleRate);

68 if (!audioBus.get())

69 return 0;

70

71 // If the bus needs no conversion then return as is.

72 if ((!mixToMono \|\| audioBus->numberOfChannels() == 1) && audioBus->sampleRat e() == sampleRate)

73 return audioBus;

74

75 return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sam pleRate);

76 }

77

78 } // namespace WebCore

79

80 #endif // ENABLE(WEB_AUDIO)

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