57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/*******************************************************************************
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/
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/ File: SoundUtils.h
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/
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/ Description: Utility functions for handling audio data.
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/
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/ Copyright 1998-1999, Be Incorporated, All Rights Reserved
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/
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*******************************************************************************/
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#if ! defined( _SoundUtils_h )
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#define _SoundUtils_h
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#include <MediaDefs.h>
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// Simple helper functions that come in handy when doing
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// buffer calculations.
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double us_to_s(bigtime_t usecs);
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bigtime_t s_to_us(double secs);
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int bytes_per_frame(const media_raw_audio_format & format);
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int frames_per_buffer(const media_raw_audio_format & format);
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bigtime_t buffer_duration(const media_raw_audio_format & format);
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bigtime_t frames_duration(const media_raw_audio_format & format,
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int64 num_frames);
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int64 frames_for_duration(const media_raw_audio_format & format,
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bigtime_t duration);
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int buffers_for_duration(const media_raw_audio_format & format,
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bigtime_t duration);
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// This is a common hook function interface for
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// SoundConsumer and SoundProducer to use.
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typedef void (*SoundProcessFunc)(void * cookie,
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bigtime_t timestamp, void * data, size_t datasize,
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const media_raw_audio_format & format);
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typedef void (*SoundNotifyFunc)(void * cookie,
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int32 code, ...);
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// These are special codes that we use in the Notify
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// function hook.
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enum {
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B_WILL_START = 1, // performance_time
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B_WILL_STOP, // performance_time immediate
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B_WILL_SEEK, // performance_time media_time
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B_WILL_TIMEWARP, // real_time performance_time
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B_CONNECTED, // name (char*)
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B_DISCONNECTED, //
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B_FORMAT_CHANGED, // media_raw_audio_format*
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B_NODE_DIES, // node will die!
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B_HOOKS_CHANGED, //
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B_OP_TIMED_OUT, // timeout that expired -- Consumer only
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B_PRODUCER_DATA_STATUS, // status performance_time -- Consumer only
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B_LATE_NOTICE // how_much performance_time -- Producer only
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};
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#endif /* _SoundUtils_h */
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