WebCore portion to tell if audio is playing in a plugin process

• Component: Media
• Status: RESOLVED FIXED

[Stephanie Lewis]

Listen to a CoreAudio property to tell if audio hardware is playing audio in the current process.

[Stephanie Lewis]

Created attachment 227804 [details]
patch

[WebKit Commit Bot]

Attachment 227804 [details] did not pass style-queue:


ERROR: Source/WebCore/ChangeLog:4:  Line contains tab character.  [whitespace/tab] [5]
ERROR: Source/WebCore/ChangeLog:10:  Line contains tab character.  [whitespace/tab] [5]
ERROR: Source/WebCore/platform/audio/mac/AudioHardwareListenerMac.cpp:34:  enum members should use InterCaps with an initial capital letter.  [readability/enum_casing] [4]
ERROR: Source/WebCore/platform/audio/mac/AudioHardwareListenerMac.cpp:49:  Tab found; better to use spaces  [whitespace/tab] [1]
ERROR: Source/WebCore/platform/audio/mac/AudioHardwareListenerMac.cpp:50:  Tab found; better to use spaces  [whitespace/tab] [1]
ERROR: Source/WebCore/platform/audio/mac/AudioHardwareListenerMac.cpp:55:  Tab found; better to use spaces  [whitespace/tab] [1]
ERROR: Source/WebCore/platform/audio/AudioHardwareListener.h:29:  Alphabetical sorting problem.  [build/include_order] [4]
Total errors found: 7 in 7 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Jer Noble]

Comment on attachment 227804 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=227804&action=review

> Source/WebCore/platform/audio/AudioHardwareListener.h:47
> +    static bool audioHardwareListenerIsSupported();

Is there a reason this needs to be a static method?  Here's an alternative idea:

> Source/WebCore/platform/audio/AudioHardwareListener.h:48
> +    bool isHardwareActive() const { return m_active; }

Consider this instead:

enum HardwareActivityType {
    Unknown,
    IsActive,
    IsInactive,
};
HardwareActivityType hardwareActivity() const { return m_activity; }

> Source/WebCore/platform/audio/AudioHardwareListener.h:54
> +    bool m_active;

...and:

HardwareActivityType m_activity;

> Source/WebCore/platform/audio/AudioHardwareListener.cpp:46
> +    , m_active(false)

...and:

    , m_active(Unknown)

This way, we don't neeed audioHardwareListenerIsSupported(), but instead `listener->hardwareActivity()` will return `Unknown` when hardware activity listening is unavailable.

[Stephanie Lewis]

http://trac.webkit.org/changeset/166442