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<title>GstAudioClock: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gstreamer-audio.html" title="Audio Library">
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<link rel="prev" href="GstAudioCdSrc.html" title="GstAudioCdSrc">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top |
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Description |
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Object Hierarchy
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GstAudioClock
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GstAudioClock — Helper object for implementing audio clocks
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Functions
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GstClockTime
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(*GstAudioClockGetTimeFunc) ()
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GstClock *
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gst_audio_clock_new ()
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GstClockTime
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gst_audio_clock_adjust ()
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GstClockTime
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gst_audio_clock_get_time ()
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void
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gst_audio_clock_reset ()
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void
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gst_audio_clock_invalidate ()
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Types and Values
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struct
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GstAudioClock
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Object Hierarchy
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GObject
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╰── GInitiallyUnowned
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╰── GstObject
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╰── GstClock
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╰── GstSystemClock
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╰── GstAudioClock
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Includes
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#include <gst/audio/gstaudioclock.h>
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Description
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GstAudioClock makes it easy for elements to implement a GstClock, they
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simply need to provide a function that returns the current clock time.
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This object is internally used to implement the clock in GstAudioBaseSink.
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Functions
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GstAudioClockGetTimeFunc ()
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GstClockTime
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(*GstAudioClockGetTimeFunc) (GstClock *clock,
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gpointer user_data);
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This function will be called whenever the current clock time needs to be
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calculated. If this function returns GST_CLOCK_TIME_NONE, the last reported
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time will be returned by the clock.
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Parameters
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clock
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the GstAudioClock
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user_data
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user data
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Returns
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the current time or GST_CLOCK_TIME_NONE if the previous time should
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be used.
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gst_audio_clock_new ()
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GstClock *
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gst_audio_clock_new (const gchar *name,
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GstAudioClockGetTimeFunc func,
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gpointer user_data,
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GDestroyNotify destroy_notify);
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Create a new GstAudioClock instance. Whenever the clock time should be
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calculated it will call func
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with user_data
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. When func
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returns
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GST_CLOCK_TIME_NONE, the clock will return the last reported time.
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Parameters
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name
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the name of the clock
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func
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a function
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user_data
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user data
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destroy_notify
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GDestroyNotify for user_data
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Returns
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a new GstAudioClock casted to a GstClock.
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[transfer full]
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gst_audio_clock_adjust ()
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GstClockTime
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gst_audio_clock_adjust (GstAudioClock *clock,
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GstClockTime time);
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Adjust time
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with the internal offset of the audio clock.
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Parameters
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clock
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a GstAudioClock
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time
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a GstClockTime
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Returns
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time
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adjusted with the internal offset.
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gst_audio_clock_get_time ()
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GstClockTime
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gst_audio_clock_get_time (GstAudioClock *clock);
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Report the time as returned by the GstAudioClockGetTimeFunc without applying
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any offsets.
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Parameters
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clock
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a GstAudioClock
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Returns
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the time as reported by the time function of the audio clock
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gst_audio_clock_reset ()
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void
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gst_audio_clock_reset (GstAudioClock *clock,
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GstClockTime time);
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Inform clock
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that future calls to GstAudioClockGetTimeFunc will return values
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starting from time
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. The clock will update an internal offset to make sure that
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future calls to internal_time will return an increasing result as required by
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the GstClock object.
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Parameters
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clock
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a GstAudioClock
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time
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a GstClockTime
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gst_audio_clock_invalidate ()
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void
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gst_audio_clock_invalidate (GstAudioClock *clock);
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Invalidate the clock function. Call this function when the provided
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GstAudioClockGetTimeFunc cannot be called anymore, for example, when the
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user_data becomes invalid.
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After calling this function, clock
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will return the last returned time for
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the rest of its lifetime.
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Parameters
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clock
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a GstAudioClock
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Types and Values
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struct GstAudioClock
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struct GstAudioClock;
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Opaque GstAudioClock.
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See Also
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GstAudioBaseSink, GstSystemClock
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Generated by GTK-Doc V1.27
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