cpi_player_output_wave.c

VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

#include "stdafx.h"
#include "globals.h"
#include "CPI_Player.h"
#include "CPI_Player_CoDec.h"
#include "CPI_Player_Output.h"
#include "CPI_Equaliser.h"

#define CPC_NUMBEROFOUTPUTBLOCKS	16
#define CPC_OUTPUTBLOCKSIZE			0x8000 

typedef struct __CPs_OutputContext_Wave
{
    HWAVEOUT m_hWaveOut;
    WAVEHDR m_aryWaveBlocks[CPC_NUMBEROFOUTPUTBLOCKS];
    DWORD m_aryBlockSizes[CPC_NUMBEROFOUTPUTBLOCKS];
    void* m_pBlockBase;
    int m_iLastReadBlockIDX;

    CPs_EqualiserModule* m_pEqualiser;

} CPs_OutputContext_Wave;
////////////////////////////////////////////////////////////////////////////////
void CPP_OMWV_Initialise(CPs_OutputModule* pModule, const CPs_FileInfo* pFileInfo, CP_HEQUALISER hEqualiser);
void CPP_OMWV_Uninitialise(CPs_OutputModule* pModule);
void CPP_OMWV_RefillBuffers(CPs_OutputModule* pModule);
void CPP_OMWV_SetPause(CPs_OutputModule* pModule, const BOOL bPause);
BOOL CPP_OMWV_IsOutputComplete(CPs_OutputModule* pModule);
void CPP_OMWV_Flush(CPs_OutputModule* pModule);
void CPP_OMWV_OnEQChanged(CPs_OutputModule* pModule);
void CPP_OMWV_SetInternalVolume(CPs_OutputModule* pModule, const int iNewVolume);
////////////////////////////////////////////////////////////////////////////////
void CPI_Player_Output_Initialise_WaveMapper(CPs_OutputModule* pModule)
{
    pModule->Initialise = CPP_OMWV_Initialise;
    pModule->Uninitialise = CPP_OMWV_Uninitialise;
    pModule->RefillBuffers = CPP_OMWV_RefillBuffers;
    pModule->SetPause = CPP_OMWV_SetPause;
    pModule->IsOutputComplete = CPP_OMWV_IsOutputComplete;
    pModule->Flush = CPP_OMWV_Flush;
    pModule->OnEQChanged = CPP_OMWV_OnEQChanged;
    pModule->SetInternalVolume = CPP_OMWV_SetInternalVolume;
    pModule->m_pModuleCookie = NULL;
    pModule->m_pcModuleName = "Cooler Wave mapper";
    pModule->m_pCoDec = NULL;
    pModule->m_pEqualiser = NULL;
}

void CPP_OMWV_Initialise(CPs_OutputModule* pModule, const CPs_FileInfo* pFileInfo, CP_HEQUALISER hEqualiser)
{
    MMRESULT mmErr;

    CPs_OutputContext_Wave* pContext;
    CP_ASSERT(pModule->m_pModuleCookie == NULL);
    pContext = (CPs_OutputContext_Wave*)malloc(sizeof(CPs_OutputContext_Wave));
    pModule->m_pModuleCookie = pContext;
    CP_TRACE0("Wave out initialising");

    pModule->m_evtBlockFree = CreateEvent(NULL, FALSE, FALSE, NULL);

    {
        WAVEFORMATEX waveformatex;
        waveformatex.wFormatTag = WAVE_FORMAT_PCM;
        waveformatex.nChannels = pFileInfo->m_bStereo ? 2 : 1;
        waveformatex.nSamplesPerSec = pFileInfo->m_iFreq_Hz;
        waveformatex.wBitsPerSample = pFileInfo->m_b16bit ? 16 : 8;
        waveformatex.nBlockAlign = (waveformatex.nChannels * waveformatex.wBitsPerSample)>>3;
        waveformatex.nAvgBytesPerSec = waveformatex.nSamplesPerSec * waveformatex.nBlockAlign;
        waveformatex.cbSize = 0;
        mmErr = waveOutOpen(	&pContext->m_hWaveOut,
                             WAVE_MAPPER,
                             &waveformatex,
                             (DWORD)pModule->m_evtBlockFree,
                             0, CALLBACK_EVENT);

        if(mmErr != MMSYSERR_NOERROR)
        {
            CP_TRACE1("Wave Open error 0x%X", mmErr);
            pContext->m_hWaveOut = NULL;
            DeleteObject(pModule->m_evtBlockFree);
        }

    }

    pContext->m_pBlockBase = VirtualAlloc(	NULL,
                                           CPC_OUTPUTBLOCKSIZE * (CPC_NUMBEROFOUTPUTBLOCKS<<1),
                                           MEM_COMMIT, PAGE_READWRITE);
    pContext->m_iLastReadBlockIDX = 0;

    {
        void* pBlockCursor = pContext->m_pBlockBase;
        int iWaveBlockIDX;
        for(iWaveBlockIDX=0; iWaveBlockIDX < CPC_NUMBEROFOUTPUTBLOCKS; iWaveBlockIDX++)
        {
            pContext->m_aryWaveBlocks[iWaveBlockIDX].dwFlags = 0;
            pContext->m_aryWaveBlocks[iWaveBlockIDX].lpData = pBlockCursor;
            pContext->m_aryWaveBlocks[iWaveBlockIDX].dwBufferLength = CPC_OUTPUTBLOCKSIZE;

            waveOutPrepareHeader(pContext->m_hWaveOut, pContext->m_aryWaveBlocks + iWaveBlockIDX, sizeof(*pContext->m_aryWaveBlocks));
            pBlockCursor = (void*)( (BYTE*)pBlockCursor + CPC_OUTPUTBLOCKSIZE);
        }
    }

    SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
    pModule->m_pEqualiser = hEqualiser;
}
void CPP_OMWV_Uninitialise(CPs_OutputModule* pModule)
{
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    CP_CHECKOBJECT(pContext);
    CP_TRACE0("Wave out shutting down");
    SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_NORMAL);

    if(pContext->m_hWaveOut)
    {
        waveOutRestart(pContext->m_hWaveOut);
        waveOutReset(pContext->m_hWaveOut);

        {
            int iWaveBlockIDX;
            for(iWaveBlockIDX=0; iWaveBlockIDX < CPC_NUMBEROFOUTPUTBLOCKS; iWaveBlockIDX++)
                waveOutUnprepareHeader(pContext->m_hWaveOut, pContext->m_aryWaveBlocks + iWaveBlockIDX, sizeof(*pContext->m_aryWaveBlocks));
        }

        VirtualFree(pContext->m_pBlockBase, 0, MEM_RELEASE);

        waveOutClose(pContext->m_hWaveOut);
        DeleteObject(pModule->m_evtBlockFree);
    }
    free(pContext);
    pModule->m_pModuleCookie = NULL;
}
//
void CPP_OMWV_RefillBuffers(CPs_OutputModule* pModule)
{
    int iBlockIDX;

    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return;
    for(iBlockIDX = 0; iBlockIDX < CPC_NUMBEROFOUTPUTBLOCKS; iBlockIDX++)
    {
        WAVEHDR* pOutputBlock = pContext->m_aryWaveBlocks + iBlockIDX;
        if( (pOutputBlock->dwFlags & WHDR_INQUEUE) == 0)
        {
            BOOL bMoreData;

            pOutputBlock->dwBufferLength = CPC_OUTPUTBLOCKSIZE;
            bMoreData = pModule->m_pCoDec->GetPCMBlock(pModule->m_pCoDec, pOutputBlock->lpData, &pOutputBlock->dwBufferLength);

            pContext->m_iLastReadBlockIDX = iBlockIDX;
            pContext->m_aryBlockSizes[iBlockIDX] = pOutputBlock->dwBufferLength;
            memcpy( ((BYTE*)pOutputBlock->lpData) + (CPC_OUTPUTBLOCKSIZE * CPC_NUMBEROFOUTPUTBLOCKS),
                    pOutputBlock->lpData,
                    pOutputBlock->dwBufferLength);

            {
                CPs_EqualiserModule* pEQModule = (CPs_EqualiserModule*)pModule->m_pEqualiser;
                pEQModule->ApplyEQToBlock_Inplace(pEQModule, pOutputBlock->lpData, pOutputBlock->dwBufferLength);
            }

            if(pOutputBlock->dwBufferLength > 0)
                waveOutWrite(pContext->m_hWaveOut, pOutputBlock, sizeof(*pOutputBlock));

            if(bMoreData == FALSE)
            {
                pModule->m_pCoDec->CloseFile(pModule->m_pCoDec);
                pModule->m_pCoDec = NULL;
                break;
            }

        }
    }
}
//
void CPP_OMWV_SetPause(CPs_OutputModule* pModule, const BOOL bPause)
{
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return;

    if(bPause == TRUE)
        waveOutPause(pContext->m_hWaveOut);
    else
        waveOutRestart(pContext->m_hWaveOut);
}
//
BOOL CPP_OMWV_IsOutputComplete(CPs_OutputModule* pModule)
{
    int iBlockIDX;
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return TRUE;

    for(iBlockIDX = 0; iBlockIDX < CPC_NUMBEROFOUTPUTBLOCKS; iBlockIDX++)
    {
        if( (pContext->m_aryWaveBlocks[iBlockIDX].dwFlags & WHDR_INQUEUE))
            return FALSE;
    }

    return TRUE;
}
//
void CPP_OMWV_OnEQChanged(CPs_OutputModule* pModule)
{
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    int iBlockIDX;

    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return;

    for(iBlockIDX = pContext->m_iLastReadBlockIDX + 1; iBlockIDX < CPC_NUMBEROFOUTPUTBLOCKS; iBlockIDX++)
    {
        if( (pContext->m_aryWaveBlocks[iBlockIDX].dwFlags & (WHDR_INQUEUE | WHDR_DONE) ))
        {
            WAVEHDR* pOutputBlock = pContext->m_aryWaveBlocks + iBlockIDX;

            pOutputBlock->dwBufferLength = pContext->m_aryBlockSizes[iBlockIDX];
            memcpy( pOutputBlock->lpData,
                    ((BYTE*)pOutputBlock->lpData) + (CPC_OUTPUTBLOCKSIZE * CPC_NUMBEROFOUTPUTBLOCKS),
                    pOutputBlock->dwBufferLength);

            {
                CPs_EqualiserModule* pEQModule = (CPs_EqualiserModule*)pModule->m_pEqualiser;
                pEQModule->ApplyEQToBlock_Inplace(pEQModule, pOutputBlock->lpData, pOutputBlock->dwBufferLength);
            }
        }
    }
    for(iBlockIDX = 0; iBlockIDX <= pContext->m_iLastReadBlockIDX; iBlockIDX++)
    {
        if( (pContext->m_aryWaveBlocks[iBlockIDX].dwFlags & (WHDR_INQUEUE | WHDR_DONE) ))
        {
            WAVEHDR* pOutputBlock = pContext->m_aryWaveBlocks + iBlockIDX;

            pOutputBlock->dwBufferLength = pContext->m_aryBlockSizes[iBlockIDX];
            memcpy( pOutputBlock->lpData,
                    ((BYTE*)pOutputBlock->lpData) + (CPC_OUTPUTBLOCKSIZE * CPC_NUMBEROFOUTPUTBLOCKS),
                    pOutputBlock->dwBufferLength);

            {
                CPs_EqualiserModule* pEQModule = (CPs_EqualiserModule*)pModule->m_pEqualiser;
                pEQModule->ApplyEQToBlock_Inplace(pEQModule, pOutputBlock->lpData, pOutputBlock->dwBufferLength);
            }
        }
    }
}
void CPP_OMWV_Flush(CPs_OutputModule* pModule)
{
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;

    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return;

    waveOutRestart(pContext->m_hWaveOut);
    waveOutReset(pContext->m_hWaveOut);

    CP_ASSERT(CPP_OMWV_IsOutputComplete(pModule));
}
//
void CPP_OMWV_SetInternalVolume(CPs_OutputModule* pModule, const int iNewVolume)
{
    CPs_OutputContext_Wave* pContext = (CPs_OutputContext_Wave*)pModule->m_pModuleCookie;
    int iNewVolume_DWORD;
    CP_CHECKOBJECT(pContext);
    if(!pContext->m_hWaveOut)
        return;

    iNewVolume_DWORD = iNewVolume * 656;
    if(iNewVolume_DWORD > 0xFFFF)
        iNewVolume_DWORD = 0xFFFF;
    iNewVolume_DWORD |= (iNewVolume_DWORD<<16);

    waveOutSetVolume(pContext->m_hWaveOut, iNewVolume_DWORD);
}
//