125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
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/***************************************************************************
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*
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* dsp.h
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*
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* Copyright (c) 1991-1996 Microsoft Corporation. All Rights Reserved.
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*
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* This code provides VDD support for SB 2.0 sound output, specifically:
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* DSP 2.01+ (excluding SB-MIDI port)
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*
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***************************************************************************/
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/*****************************************************************************
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*
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* #defines
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*
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*****************************************************************************/
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/*
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* DSP Ports
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*/
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#define RESET_PORT 0x06 // used to reset SoundBlaster
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#define READ_STATUS 0x0E // 0xFF-data to read, 0x7F-no data to read
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#define READ_DATA 0x0A // App reads data from this port
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#define WRITE_STATUS 0x0C // 0x7f-port ready, 0xFF-port not ready
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#define WRITE_PORT 0x0C // Data or command
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/*
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* Only implemented commands are defined
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*/
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/*
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* DSP commands - miscellaneous
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*/
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#define DSP_GET_VERSION 0xE1 // dsp version command
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#define DSP_CARD_IDENTIFY 0xE0 // byte inverter
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#define DSP_TABLE_MUNGE 0xE2 // jump table munging
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#define DSP_LOAD_RES_REG 0xE4 // load byte into reserved register
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#define DSP_READ_RES_REG 0xE8 // read byte from reserved register
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#define DSP_GENERATE_INT 0xF2 // generate an interrupt
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/*
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* DSP commands - speaker
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*/
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#define DSP_SPEAKER_ON 0xD1 // speaker on command
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#define DSP_SPEAKER_OFF 0xD3 // speaker off command
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/*
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* DSP commands - DMA mode
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*/
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#define DSP_SET_SAMPLE_RATE 0x40 // set the sample rate (one byte format)
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#define DSP_SET_BLOCK_SIZE 0x48 // set dma block size
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#define DSP_PAUSE_DMA 0xD0 // pause dma
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#define DSP_CONTINUE_DMA 0xD4 // continue dma
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#define DSP_STOP_AUTO 0xDA // Stop auto init dma
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#define DSP_WRITE 0x14 // Start single cycle output (8-bit PCM mono)
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#define DSP_WRITE_HS 0x91 // Start single cycle high-speed output (8-bit PCM mono)
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#define DSP_WRITE_AUTO 0x1C // Start auto init output (8-bit PCM mono)
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#define DSP_WRITE_HS_AUTO 0x90 // Start auto init high=speed output (8-bit PCM mono)
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#define DSP_READ 0x24 // Start single cycle input (not implemented)
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/*
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* Performance parameters for single and auto-init DMA fine tuning
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*/
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#define AUTO_BLOCK_SIZE 0x100 // size of each buffer in auto
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#define DEFAULT_LOOKAHEAD 0x600 // target # of bytes to queue to kernel driver
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#define MAX_WAVE_BYTES 0x2000 // maximum # of bytes to queue to kernel driver
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#define SINGLE_PIECES 2 // number of pieces in each single write
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#define SINGLE_SLEEP_ADJ 15 // number of overhead milliseconds in single
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/*****************************************************************************
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*
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* Function Prototypes
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*
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*****************************************************************************/
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/*
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* General function prototypes
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*/
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BOOL DspProcessAttach(VOID);
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VOID DspProcessDetach(VOID);
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VOID DspReadData(BYTE * data);
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VOID DspReadStatus(BYTE * data);
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VOID DspResetWrite(BYTE data);
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VOID DspWrite(BYTE data);
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void WriteCommandByte(BYTE command);
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VOID ResetDSP(VOID);
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void TableMunger(BYTE data);
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DWORD GetSamplingRate(void);
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void GenerateInterrupt(void);
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void SetSpeaker(BOOL);
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/*
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* Wave function prototypes
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*/
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UINT FindWaveDevice(void);
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BOOL OpenWaveDevice(VOID);
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void ResetWaveDevice(void);
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void CloseWaveDevice(void);
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BOOL TestWaveFormat(DWORD sampleRate);
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BOOL SetWaveFormat(void);
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void PauseDMA(void);
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void ContinueDMA(void);
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ULONG GetDMATransferAddress(void);
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void SetDMAStatus(BOOL requesting, BOOL tc);
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BOOL StartAutoWave(void);
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void StopAutoWave(BOOL wait);
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BOOL StartSingleWave(void);
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void StopSingleWave(BOOL wait);
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DWORD WINAPI AutoThreadEntry(LPVOID context);
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DWORD WINAPI SingleThreadEntry(LPVOID context);
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DWORD WINAPI SingleSynchThreadEntry(LPVOID context);
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