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900 lines
22 KiB
900 lines
22 KiB
5 years ago
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//===========================================================================//
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#include "snd_dev_wave.h"
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#pragma warning( disable: 4201 )
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#include <mmsystem.h>
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#pragma warning( default: 4201 )
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#include <stdio.h>
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#include <math.h>
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#include "soundsystem/snd_audio_source.h"
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#include "soundsystem.h"
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#include "soundsystem/snd_device.h"
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#include "tier1/utlvector.h"
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#include "filesystem.h"
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#include "sentence.h"
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//-----------------------------------------------------------------------------
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// Forward declarations
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//-----------------------------------------------------------------------------
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class CAudioMixer;
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//-----------------------------------------------------------------------------
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// Important constants
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//-----------------------------------------------------------------------------
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// 64K is > 1 second at 16-bit, 22050 Hz
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// 44k: UNDONE - need to double buffers now that we're playing back at 44100?
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#define OUTPUT_CHANNEL_COUNT 2
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#define BYTES_PER_SAMPLE 2
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#define OUTPUT_SAMPLE_RATE SOUND_DMA_SPEED
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#define OUTPUT_BUFFER_COUNT 64
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#define OUTPUT_BUFFER_MASK 0x3F
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#define OUTPUT_BUFFER_SAMPLE_COUNT (OUTPUT_BUFFER_SIZE_BYTES / BYTES_PER_SAMPLE)
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#define OUTPUT_BUFFER_SIZE_BYTES 1024
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#define PAINTBUFFER_SIZE 1024
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#define MAX_CHANNELS 16
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//-----------------------------------------------------------------------------
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// Implementation of IAudioDevice for WAV files
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//-----------------------------------------------------------------------------
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class CAudioDeviceWave : public IAudioDevice
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{
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public:
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// Inherited from IAudioDevice
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virtual bool Init( void );
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virtual void Shutdown( void );
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virtual const char *DeviceName( void ) const;
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virtual int DeviceChannels( void ) const;
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virtual int DeviceSampleBits( void ) const;
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virtual int DeviceSampleBytes( void ) const;
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virtual int DeviceSampleRate( void ) const;
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virtual int DeviceSampleCount( void ) const;
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virtual void Mix8Mono( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward = true );
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virtual void Mix8Stereo( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward = true );
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virtual void Mix16Mono( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward = true );
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virtual void Mix16Stereo( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward = true );
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virtual int PaintBufferSampleCount( void ) const;
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virtual void MixBegin( void );
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// mix a buffer up to time (time is absolute)
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void Update( float time );
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void Flush( void );
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void TransferBufferStereo16( short *pOutput, int sampleCount );
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int GetOutputPosition( void );
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float GetAmountofTimeAhead( void );
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int GetNumberofSamplesAhead( void );
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void AddSource( CAudioMixer *pSource );
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void StopSounds( void );
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int FindSourceIndex( CAudioMixer *pSource );
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CAudioMixer *GetMixerForSource( CAudioSource *source );
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private:
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class CAudioMixerState
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{
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public:
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CAudioMixer *mixer;
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};
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class CAudioBuffer
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{
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public:
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WAVEHDR *hdr;
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bool submitted;
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int submit_sample_count;
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CUtlVector< CAudioMixerState > m_Referenced;
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};
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struct portable_samplepair_t
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{
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int left;
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int right;
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};
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void OpenWaveOut( void );
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void CloseWaveOut( void );
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void AllocateOutputBuffers();
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void FreeOutputBuffers();
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void* AllocOutputMemory( int nSize, HGLOBAL &hMemory );
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void FreeOutputMemory( HGLOBAL &hMemory );
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bool ValidWaveOut( void ) const;
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CAudioBuffer *GetEmptyBuffer( void );
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void SilenceBuffer( short *pSamples, int sampleCount );
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void SetChannel( int channelIndex, CAudioMixer *pSource );
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void FreeChannel( int channelIndex );
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void RemoveMixerChannelReferences( CAudioMixer *mixer );
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void AddToReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer );
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void RemoveFromReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer );
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bool IsSourceReferencedByActiveBuffer( CAudioMixer *mixer );
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bool IsSoundInReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer );
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// Compute how many samples we've mixed since most recent buffer submission
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void ComputeSampleAheadAmount( void );
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// This is a single allocation for all wave headers (there are OUTPUT_BUFFER_COUNT of them)
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HGLOBAL m_hWaveHdr;
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// This is a single allocation for all wave data (there are OUTPUT_BUFFER_COUNT of them)
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HANDLE m_hWaveData;
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HWAVEOUT m_waveOutHandle;
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float m_mixTime;
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float m_baseTime;
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int m_sampleIndex;
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CAudioBuffer m_buffers[ OUTPUT_BUFFER_COUNT ];
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CAudioMixer *m_sourceList[MAX_CHANNELS];
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int m_nEstimatedSamplesAhead;
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portable_samplepair_t m_paintbuffer[ PAINTBUFFER_SIZE ];
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};
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//-----------------------------------------------------------------------------
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// Singleton
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//-----------------------------------------------------------------------------
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IAudioDevice *Audio_CreateWaveDevice( void )
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{
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return new CAudioDeviceWave;
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}
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//-----------------------------------------------------------------------------
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// Init, shutdown
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//-----------------------------------------------------------------------------
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bool CAudioDeviceWave::Init( void )
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{
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m_hWaveData = NULL;
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m_hWaveHdr = NULL;
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m_waveOutHandle = NULL;
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for ( int i = 0; i < OUTPUT_BUFFER_COUNT; i++ )
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{
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CAudioBuffer *buffer = &m_buffers[ i ];
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Assert( buffer );
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buffer->hdr = NULL;
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buffer->submitted = false;
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buffer->submit_sample_count = false;
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}
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OpenWaveOut();
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m_mixTime = m_baseTime = -1;
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m_sampleIndex = 0;
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memset( m_sourceList, 0, sizeof(m_sourceList) );
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m_nEstimatedSamplesAhead = (int)( ( float ) OUTPUT_SAMPLE_RATE / 10.0f );
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return true;
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}
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void CAudioDeviceWave::Shutdown( void )
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{
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CloseWaveOut();
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}
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//-----------------------------------------------------------------------------
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// WAV out device
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//-----------------------------------------------------------------------------
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inline bool CAudioDeviceWave::ValidWaveOut( void ) const
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{
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return m_waveOutHandle != 0;
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}
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//-----------------------------------------------------------------------------
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// Opens the windows wave out device
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//-----------------------------------------------------------------------------
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void CAudioDeviceWave::OpenWaveOut( void )
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{
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WAVEFORMATEX waveFormat;
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memset( &waveFormat, 0, sizeof(waveFormat) );
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// Select a PCM, 16-bit stereo playback device
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waveFormat.cbSize = sizeof(waveFormat);
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waveFormat.wFormatTag = WAVE_FORMAT_PCM;
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waveFormat.nChannels = DeviceChannels();
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waveFormat.wBitsPerSample = DeviceSampleBits();
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waveFormat.nSamplesPerSec = DeviceSampleRate();
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waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;
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waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
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MMRESULT errorCode = waveOutOpen( &m_waveOutHandle, WAVE_MAPPER, &waveFormat, 0, 0L, CALLBACK_NULL );
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while ( errorCode != MMSYSERR_NOERROR )
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{
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if ( errorCode != MMSYSERR_ALLOCATED )
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{
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DWarning( "soundsystem", 1, "waveOutOpen failed\n" );
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m_waveOutHandle = 0;
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return;
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}
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int nRetVal = MessageBox( NULL,
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"The sound hardware is in use by another app.\n\n"
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"Select Retry to try to start sound again or Cancel to run with no sound.",
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"Sound not available",
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MB_RETRYCANCEL | MB_SETFOREGROUND | MB_ICONEXCLAMATION);
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if ( nRetVal != IDRETRY )
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{
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DWarning( "soundsystem", 1, "waveOutOpen failure--hardware already in use\n" );
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m_waveOutHandle = 0;
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return;
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}
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errorCode = waveOutOpen( &m_waveOutHandle, WAVE_MAPPER, &waveFormat, 0, 0L, CALLBACK_NULL );
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}
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AllocateOutputBuffers();
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}
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//-----------------------------------------------------------------------------
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// Closes the windows wave out device
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//-----------------------------------------------------------------------------
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void CAudioDeviceWave::CloseWaveOut( void )
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{
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if ( ValidWaveOut() )
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{
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waveOutReset( m_waveOutHandle );
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FreeOutputBuffers();
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waveOutClose( m_waveOutHandle );
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m_waveOutHandle = NULL;
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}
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}
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//-----------------------------------------------------------------------------
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// Alloc output memory
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//-----------------------------------------------------------------------------
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void* CAudioDeviceWave::AllocOutputMemory( int nSize, HGLOBAL &hMemory )
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{
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// Output memory for waveform data+hdrs must be
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// globally allocated with GMEM_MOVEABLE and GMEM_SHARE flags.
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hMemory = GlobalAlloc( GMEM_MOVEABLE | GMEM_SHARE, nSize );
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if ( !hMemory )
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{
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DWarning( "soundsystem", 1, "Sound: Out of memory.\n");
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CloseWaveOut();
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return NULL;
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}
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HPSTR lpData = (char *)GlobalLock( hMemory );
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if ( !lpData )
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{
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DWarning( "soundsystem", 1, "Sound: Failed to lock.\n");
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GlobalFree( hMemory );
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hMemory = NULL;
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CloseWaveOut();
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return NULL;
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}
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memset( lpData, 0, nSize );
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return lpData;
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}
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//-----------------------------------------------------------------------------
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// Free output memory
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//-----------------------------------------------------------------------------
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void CAudioDeviceWave::FreeOutputMemory( HGLOBAL &hMemory )
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{
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if ( hMemory )
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{
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GlobalUnlock( hMemory );
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GlobalFree( hMemory );
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hMemory = NULL;
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}
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}
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//-----------------------------------------------------------------------------
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// Allocate, free output buffers
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//-----------------------------------------------------------------------------
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void CAudioDeviceWave::AllocateOutputBuffers()
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{
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// Allocate and lock memory for the waveform data.
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int nBufferSize = OUTPUT_BUFFER_SIZE_BYTES * OUTPUT_BUFFER_COUNT;
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HPSTR lpData = (char *)AllocOutputMemory( nBufferSize, m_hWaveData );
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if ( !lpData )
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return;
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// Allocate and lock memory for the waveform header
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int nHdrSize = sizeof( WAVEHDR ) * OUTPUT_BUFFER_COUNT;
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LPWAVEHDR lpWaveHdr = (LPWAVEHDR)AllocOutputMemory( nHdrSize, m_hWaveHdr );
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if ( !lpWaveHdr )
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return;
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// After allocation, set up and prepare headers.
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for ( int i=0 ; i < OUTPUT_BUFFER_COUNT; i++ )
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{
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LPWAVEHDR lpHdr = lpWaveHdr + i;
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lpHdr->dwBufferLength = OUTPUT_BUFFER_SIZE_BYTES;
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lpHdr->lpData = lpData + (i * OUTPUT_BUFFER_SIZE_BYTES);
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MMRESULT nResult = waveOutPrepareHeader( m_waveOutHandle, lpHdr, sizeof(WAVEHDR) );
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if ( nResult != MMSYSERR_NOERROR )
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{
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DWarning( "soundsystem", 1, "Sound: failed to prepare wave headers\n" );
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CloseWaveOut();
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return;
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}
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m_buffers[i].hdr = lpHdr;
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}
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}
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void CAudioDeviceWave::FreeOutputBuffers()
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{
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// Unprepare headers.
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for ( int i=0 ; i < OUTPUT_BUFFER_COUNT; i++ )
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{
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if ( m_buffers[i].hdr )
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{
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waveOutUnprepareHeader( m_waveOutHandle, m_buffers[i].hdr, sizeof(WAVEHDR) );
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m_buffers[i].hdr = NULL;
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}
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m_buffers[i].submitted = false;
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m_buffers[i].submit_sample_count = 0;
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m_buffers[i].m_Referenced.Purge();
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}
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FreeOutputMemory( m_hWaveData );
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FreeOutputMemory( m_hWaveHdr );
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}
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//-----------------------------------------------------------------------------
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// Device parameters
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//-----------------------------------------------------------------------------
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const char *CAudioDeviceWave::DeviceName( void ) const
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{
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return "Windows WAVE";
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}
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int CAudioDeviceWave::DeviceChannels( void ) const
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{
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return 2;
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}
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int CAudioDeviceWave::DeviceSampleBits( void ) const
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{
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return (BYTES_PER_SAMPLE * 8);
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}
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int CAudioDeviceWave::DeviceSampleBytes( void ) const
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{
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return BYTES_PER_SAMPLE;
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}
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int CAudioDeviceWave::DeviceSampleRate( void ) const
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|
{
|
||
|
|
return OUTPUT_SAMPLE_RATE;
|
||
|
|
}
|
||
|
|
|
||
|
|
int CAudioDeviceWave::DeviceSampleCount( void ) const
|
||
|
|
{
|
||
|
|
return OUTPUT_BUFFER_SAMPLE_COUNT;
|
||
|
|
}
|
||
|
|
|
||
|
|
int CAudioDeviceWave::PaintBufferSampleCount( void ) const
|
||
|
|
{
|
||
|
|
return PAINTBUFFER_SIZE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Mixing routines
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void CAudioDeviceWave::Mix8Mono( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward )
|
||
|
|
{
|
||
|
|
int sampleIndex = 0;
|
||
|
|
fixedint sampleFrac = inputOffset;
|
||
|
|
|
||
|
|
int fixup = 0;
|
||
|
|
int fixupstep = 1;
|
||
|
|
|
||
|
|
if ( !forward )
|
||
|
|
{
|
||
|
|
fixup = outCount - 1;
|
||
|
|
fixupstep = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( int i = 0; i < outCount; i++, fixup += fixupstep )
|
||
|
|
{
|
||
|
|
int dest = max( outputOffset + fixup, 0 );
|
||
|
|
|
||
|
|
m_paintbuffer[ dest ].left += pChannel->leftvol * pData[sampleIndex];
|
||
|
|
m_paintbuffer[ dest ].right += pChannel->rightvol * pData[sampleIndex];
|
||
|
|
sampleFrac += rateScaleFix;
|
||
|
|
sampleIndex += FIX_INTPART(sampleFrac);
|
||
|
|
sampleFrac = FIX_FRACPART(sampleFrac);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::Mix8Stereo( channel_t *pChannel, char *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward )
|
||
|
|
{
|
||
|
|
int sampleIndex = 0;
|
||
|
|
fixedint sampleFrac = inputOffset;
|
||
|
|
|
||
|
|
int fixup = 0;
|
||
|
|
int fixupstep = 1;
|
||
|
|
|
||
|
|
if ( !forward )
|
||
|
|
{
|
||
|
|
fixup = outCount - 1;
|
||
|
|
fixupstep = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( int i = 0; i < outCount; i++, fixup += fixupstep )
|
||
|
|
{
|
||
|
|
int dest = max( outputOffset + fixup, 0 );
|
||
|
|
|
||
|
|
m_paintbuffer[ dest ].left += pChannel->leftvol * pData[sampleIndex];
|
||
|
|
m_paintbuffer[ dest ].right += pChannel->rightvol * pData[sampleIndex+1];
|
||
|
|
sampleFrac += rateScaleFix;
|
||
|
|
sampleIndex += FIX_INTPART(sampleFrac)<<1;
|
||
|
|
sampleFrac = FIX_FRACPART(sampleFrac);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::Mix16Mono( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward )
|
||
|
|
{
|
||
|
|
int sampleIndex = 0;
|
||
|
|
fixedint sampleFrac = inputOffset;
|
||
|
|
|
||
|
|
int fixup = 0;
|
||
|
|
int fixupstep = 1;
|
||
|
|
|
||
|
|
if ( !forward )
|
||
|
|
{
|
||
|
|
fixup = outCount - 1;
|
||
|
|
fixupstep = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( int i = 0; i < outCount; i++, fixup += fixupstep )
|
||
|
|
{
|
||
|
|
int dest = max( outputOffset + fixup, 0 );
|
||
|
|
|
||
|
|
m_paintbuffer[ dest ].left += (pChannel->leftvol * pData[sampleIndex])>>8;
|
||
|
|
m_paintbuffer[ dest ].right += (pChannel->rightvol * pData[sampleIndex])>>8;
|
||
|
|
sampleFrac += rateScaleFix;
|
||
|
|
sampleIndex += FIX_INTPART(sampleFrac);
|
||
|
|
sampleFrac = FIX_FRACPART(sampleFrac);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::Mix16Stereo( channel_t *pChannel, short *pData, int outputOffset, int inputOffset, fixedint rateScaleFix, int outCount, int timecompress, bool forward )
|
||
|
|
{
|
||
|
|
int sampleIndex = 0;
|
||
|
|
fixedint sampleFrac = inputOffset;
|
||
|
|
|
||
|
|
int fixup = 0;
|
||
|
|
int fixupstep = 1;
|
||
|
|
|
||
|
|
if ( !forward )
|
||
|
|
{
|
||
|
|
fixup = outCount - 1;
|
||
|
|
fixupstep = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( int i = 0; i < outCount; i++, fixup += fixupstep )
|
||
|
|
{
|
||
|
|
int dest = max( outputOffset + fixup, 0 );
|
||
|
|
|
||
|
|
m_paintbuffer[ dest ].left += (pChannel->leftvol * pData[sampleIndex])>>8;
|
||
|
|
m_paintbuffer[ dest ].right += (pChannel->rightvol * pData[sampleIndex+1])>>8;
|
||
|
|
|
||
|
|
sampleFrac += rateScaleFix;
|
||
|
|
sampleIndex += FIX_INTPART(sampleFrac)<<1;
|
||
|
|
sampleFrac = FIX_FRACPART(sampleFrac);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::MixBegin( void )
|
||
|
|
{
|
||
|
|
memset( m_paintbuffer, 0, sizeof(m_paintbuffer) );
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::TransferBufferStereo16( short *pOutput, int sampleCount )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < sampleCount; i++ )
|
||
|
|
{
|
||
|
|
if ( m_paintbuffer[i].left > 32767 )
|
||
|
|
m_paintbuffer[i].left = 32767;
|
||
|
|
else if ( m_paintbuffer[i].left < -32768 )
|
||
|
|
m_paintbuffer[i].left = -32768;
|
||
|
|
|
||
|
|
if ( m_paintbuffer[i].right > 32767 )
|
||
|
|
m_paintbuffer[i].right = 32767;
|
||
|
|
else if ( m_paintbuffer[i].right < -32768 )
|
||
|
|
m_paintbuffer[i].right = -32768;
|
||
|
|
|
||
|
|
*pOutput++ = (short)m_paintbuffer[i].left;
|
||
|
|
*pOutput++ = (short)m_paintbuffer[i].right;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::RemoveMixerChannelReferences( CAudioMixer *mixer )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < OUTPUT_BUFFER_COUNT; i++ )
|
||
|
|
{
|
||
|
|
RemoveFromReferencedList( mixer, &m_buffers[ i ] );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::AddToReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer )
|
||
|
|
{
|
||
|
|
// Already in list
|
||
|
|
for ( int i = 0; i < buffer->m_Referenced.Size(); i++ )
|
||
|
|
{
|
||
|
|
if ( buffer->m_Referenced[ i ].mixer == mixer )
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Just remove it
|
||
|
|
int idx = buffer->m_Referenced.AddToTail();
|
||
|
|
|
||
|
|
CAudioMixerState *state = &buffer->m_Referenced[ idx ];
|
||
|
|
state->mixer = mixer;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::RemoveFromReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < buffer->m_Referenced.Size(); i++ )
|
||
|
|
{
|
||
|
|
if ( buffer->m_Referenced[ i ].mixer == mixer )
|
||
|
|
{
|
||
|
|
buffer->m_Referenced.Remove( i );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CAudioDeviceWave::IsSoundInReferencedList( CAudioMixer *mixer, CAudioBuffer *buffer )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < buffer->m_Referenced.Size(); i++ )
|
||
|
|
{
|
||
|
|
if ( buffer->m_Referenced[ i ].mixer == mixer )
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CAudioDeviceWave::IsSourceReferencedByActiveBuffer( CAudioMixer *mixer )
|
||
|
|
{
|
||
|
|
if ( !ValidWaveOut() )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
CAudioBuffer *buffer;
|
||
|
|
for ( int i = 0; i < OUTPUT_BUFFER_COUNT; i++ )
|
||
|
|
{
|
||
|
|
buffer = &m_buffers[ i ];
|
||
|
|
if ( !buffer->submitted )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if ( buffer->hdr->dwFlags & WHDR_DONE )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
// See if it's referenced
|
||
|
|
if ( IsSoundInReferencedList( mixer, buffer ) )
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
CAudioDeviceWave::CAudioBuffer *CAudioDeviceWave::GetEmptyBuffer( void )
|
||
|
|
{
|
||
|
|
CAudioBuffer *pOutput = NULL;
|
||
|
|
if ( ValidWaveOut() )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < OUTPUT_BUFFER_COUNT; i++ )
|
||
|
|
{
|
||
|
|
if ( !(m_buffers[ i ].submitted ) ||
|
||
|
|
m_buffers[i].hdr->dwFlags & WHDR_DONE )
|
||
|
|
{
|
||
|
|
pOutput = &m_buffers[i];
|
||
|
|
pOutput->submitted = true;
|
||
|
|
pOutput->m_Referenced.Purge();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return pOutput;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::SilenceBuffer( short *pSamples, int sampleCount )
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for ( i = 0; i < sampleCount; i++ )
|
||
|
|
{
|
||
|
|
// left
|
||
|
|
*pSamples++ = 0;
|
||
|
|
// right
|
||
|
|
*pSamples++ = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::Flush( void )
|
||
|
|
{
|
||
|
|
waveOutReset( m_waveOutHandle );
|
||
|
|
}
|
||
|
|
|
||
|
|
// mix a buffer up to time (time is absolute)
|
||
|
|
void CAudioDeviceWave::Update( float time )
|
||
|
|
{
|
||
|
|
if ( !ValidWaveOut() )
|
||
|
|
return;
|
||
|
|
|
||
|
|
// reset the system
|
||
|
|
if ( m_mixTime < 0 || time < m_baseTime )
|
||
|
|
{
|
||
|
|
m_baseTime = time;
|
||
|
|
m_mixTime = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// put time in our coordinate frame
|
||
|
|
time -= m_baseTime;
|
||
|
|
|
||
|
|
if ( time > m_mixTime )
|
||
|
|
{
|
||
|
|
CAudioBuffer *pBuffer = GetEmptyBuffer();
|
||
|
|
|
||
|
|
// no free buffers, mixing is ahead of the playback!
|
||
|
|
if ( !pBuffer || !pBuffer->hdr )
|
||
|
|
{
|
||
|
|
//Con_Printf( "out of buffers\n" );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// UNDONE: These numbers are constants
|
||
|
|
// calc number of samples (2 channels * 2 bytes per sample)
|
||
|
|
int sampleCount = pBuffer->hdr->dwBufferLength >> 2;
|
||
|
|
m_mixTime += sampleCount * (1.0f / OUTPUT_SAMPLE_RATE);
|
||
|
|
|
||
|
|
short *pSamples = reinterpret_cast<short *>(pBuffer->hdr->lpData);
|
||
|
|
|
||
|
|
SilenceBuffer( pSamples, sampleCount );
|
||
|
|
|
||
|
|
int tempCount = sampleCount;
|
||
|
|
|
||
|
|
while ( tempCount > 0 )
|
||
|
|
{
|
||
|
|
if ( tempCount > PaintBufferSampleCount() )
|
||
|
|
{
|
||
|
|
sampleCount = PaintBufferSampleCount();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
sampleCount = tempCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
MixBegin();
|
||
|
|
for ( int i = 0; i < MAX_CHANNELS; i++ )
|
||
|
|
{
|
||
|
|
CAudioMixer *pSource = m_sourceList[i];
|
||
|
|
if ( !pSource )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
int currentsample = pSource->GetSamplePosition();
|
||
|
|
bool forward = pSource->GetDirection();
|
||
|
|
|
||
|
|
if ( pSource->GetActive() )
|
||
|
|
{
|
||
|
|
if ( !pSource->MixDataToDevice( this, pSource->GetChannel(), currentsample, sampleCount, DeviceSampleRate(), forward ) )
|
||
|
|
{
|
||
|
|
// Source becomes inactive when last submitted sample is finally
|
||
|
|
// submitted. But it lingers until it's no longer referenced
|
||
|
|
pSource->SetActive( false );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
AddToReferencedList( pSource, pBuffer );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if ( !IsSourceReferencedByActiveBuffer( pSource ) )
|
||
|
|
{
|
||
|
|
if ( !pSource->GetAutoDelete() )
|
||
|
|
{
|
||
|
|
FreeChannel( i );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pSource->IncrementSamples( pSource->GetChannel(), currentsample, sampleCount, DeviceSampleRate(), forward );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
TransferBufferStereo16( pSamples, sampleCount );
|
||
|
|
|
||
|
|
m_sampleIndex += sampleCount;
|
||
|
|
tempCount -= sampleCount;
|
||
|
|
pSamples += sampleCount * 2;
|
||
|
|
}
|
||
|
|
// if the buffers aren't aligned on sample boundaries, this will hard-lock the machine!
|
||
|
|
|
||
|
|
pBuffer->submit_sample_count = GetOutputPosition();
|
||
|
|
|
||
|
|
waveOutWrite( m_waveOutHandle, pBuffer->hdr, sizeof(*(pBuffer->hdr)) );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
int CAudioDeviceWave::GetNumberofSamplesAhead( void )
|
||
|
|
{
|
||
|
|
ComputeSampleAheadAmount();
|
||
|
|
return m_nEstimatedSamplesAhead;
|
||
|
|
}
|
||
|
|
|
||
|
|
float CAudioDeviceWave::GetAmountofTimeAhead( void )
|
||
|
|
{
|
||
|
|
ComputeSampleAheadAmount();
|
||
|
|
return ( (float)m_nEstimatedSamplesAhead / (float)OUTPUT_SAMPLE_RATE );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Find the most recent submitted sample that isn't flagged as whdr_done
|
||
|
|
void CAudioDeviceWave::ComputeSampleAheadAmount( void )
|
||
|
|
{
|
||
|
|
m_nEstimatedSamplesAhead = 0;
|
||
|
|
|
||
|
|
int newest_sample_index = -1;
|
||
|
|
int newest_sample_count = 0;
|
||
|
|
|
||
|
|
CAudioBuffer *buffer;
|
||
|
|
|
||
|
|
if ( ValidDevice() )
|
||
|
|
{
|
||
|
|
|
||
|
|
for ( int i = 0; i < OUTPUT_BUFFER_COUNT; i++ )
|
||
|
|
{
|
||
|
|
buffer = &m_buffers[ i ];
|
||
|
|
if ( !buffer->submitted )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if ( buffer->hdr->dwFlags & WHDR_DONE )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if ( buffer->submit_sample_count > newest_sample_count )
|
||
|
|
{
|
||
|
|
newest_sample_index = i;
|
||
|
|
newest_sample_count = buffer->submit_sample_count;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( newest_sample_index == -1 )
|
||
|
|
return;
|
||
|
|
|
||
|
|
|
||
|
|
buffer = &m_buffers[ newest_sample_index ];
|
||
|
|
int currentPos = GetOutputPosition() ;
|
||
|
|
m_nEstimatedSamplesAhead = currentPos - buffer->submit_sample_count;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
|
||
|
|
int CAudioDeviceWave::FindSourceIndex( CAudioMixer *pSource )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < MAX_CHANNELS; i++ )
|
||
|
|
{
|
||
|
|
if ( pSource == m_sourceList[i] )
|
||
|
|
{
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
CAudioMixer *CAudioDeviceWave::GetMixerForSource( CAudioSource *source )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < MAX_CHANNELS; i++ )
|
||
|
|
{
|
||
|
|
if ( !m_sourceList[i] )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
if ( source == m_sourceList[i]->GetSource() )
|
||
|
|
{
|
||
|
|
return m_sourceList[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::AddSource( CAudioMixer *pSource )
|
||
|
|
{
|
||
|
|
int slot = 0;
|
||
|
|
for ( int i = 0; i < MAX_CHANNELS; i++ )
|
||
|
|
{
|
||
|
|
if ( !m_sourceList[i] )
|
||
|
|
{
|
||
|
|
slot = i;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( m_sourceList[slot] )
|
||
|
|
{
|
||
|
|
FreeChannel( slot );
|
||
|
|
}
|
||
|
|
SetChannel( slot, pSource );
|
||
|
|
|
||
|
|
pSource->SetActive( true );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::StopSounds( void )
|
||
|
|
{
|
||
|
|
for ( int i = 0; i < MAX_CHANNELS; i++ )
|
||
|
|
{
|
||
|
|
if ( m_sourceList[i] )
|
||
|
|
{
|
||
|
|
FreeChannel( i );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CAudioDeviceWave::SetChannel( int channelIndex, CAudioMixer *pSource )
|
||
|
|
{
|
||
|
|
if ( channelIndex < 0 || channelIndex >= MAX_CHANNELS )
|
||
|
|
return;
|
||
|
|
|
||
|
|
m_sourceList[channelIndex] = pSource;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CAudioDeviceWave::FreeChannel( int channelIndex )
|
||
|
|
{
|
||
|
|
if ( channelIndex < 0 || channelIndex >= MAX_CHANNELS )
|
||
|
|
return;
|
||
|
|
|
||
|
|
if ( m_sourceList[channelIndex] )
|
||
|
|
{
|
||
|
|
RemoveMixerChannelReferences( m_sourceList[channelIndex] );
|
||
|
|
|
||
|
|
delete m_sourceList[channelIndex];
|
||
|
|
m_sourceList[channelIndex] = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int CAudioDeviceWave::GetOutputPosition( void )
|
||
|
|
{
|
||
|
|
if ( !m_waveOutHandle )
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
MMTIME mmtime;
|
||
|
|
mmtime.wType = TIME_SAMPLES;
|
||
|
|
waveOutGetPosition( m_waveOutHandle, &mmtime, sizeof( MMTIME ) );
|
||
|
|
|
||
|
|
// Convert time to sample count
|
||
|
|
return ( mmtime.u.sample );
|
||
|
|
}
|
||
|
|
|