jamulus/windows/sound.cpp

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/******************************************************************************\
* Copyright (c) 2004-2006
*
* Author(s):
* Volker Fischer
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*
* Description:
* Sound card interface for Windows operating systems
*
******************************************************************************
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
\******************************************************************************/
#include "Sound.h"
/* Implementation *************************************************************/
/******************************************************************************\
* Wave in *
\******************************************************************************/
bool CSound::Read(CVector<short>& psData)
{
int i;
bool bError;
/* Check if device must be opened or reinitialized */
if (bChangParamIn == TRUE)
{
OpenInDevice();
/* Reinit sound interface */
InitRecording(iBufferSizeIn, bBlockingRec);
/* Reset flag */
bChangParamIn = FALSE;
}
/* Wait until data is available */
if (!(m_WaveInHeader[iWhichBufferIn].dwFlags & WHDR_DONE))
{
if (bBlockingRec == TRUE)
WaitForSingleObject(m_WaveInEvent, INFINITE);
else
return FALSE;
}
/* Check if buffers got lost */
int iNumInBufDone = 0;
for (i = 0; i < iCurNumSndBufIn; i++)
{
if (m_WaveInHeader[i].dwFlags & WHDR_DONE)
iNumInBufDone++;
}
/* If the number of done buffers equals the total number of buffers, it is
very likely that a buffer got lost -> set error flag */
if (iNumInBufDone == iCurNumSndBufIn)
bError = TRUE;
else
bError = FALSE;
/* Copy data from sound card in output buffer */
for (i = 0; i < iBufferSizeIn; i++)
psData[i] = psSoundcardBuffer[iWhichBufferIn][i];
/* Add the buffer so that it can be filled with new samples */
AddInBuffer();
/* In case more than one buffer was ready, reset event */
ResetEvent(m_WaveInEvent);
return bError;
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}
void CSound::AddInBuffer()
{
/* Unprepare old wave-header */
waveInUnprepareHeader(
m_WaveIn, &m_WaveInHeader[iWhichBufferIn], sizeof(WAVEHDR));
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/* Prepare buffers for sending to sound interface */
PrepareInBuffer(iWhichBufferIn);
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/* Send buffer to driver for filling with new data */
waveInAddBuffer(m_WaveIn, &m_WaveInHeader[iWhichBufferIn], sizeof(WAVEHDR));
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/* Toggle buffers */
iWhichBufferIn++;
if (iWhichBufferIn == iCurNumSndBufIn)
iWhichBufferIn = 0;
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}
void CSound::PrepareInBuffer(int iBufNum)
{
/* Set struct entries */
m_WaveInHeader[iBufNum].lpData = (LPSTR) &psSoundcardBuffer[iBufNum][0];
m_WaveInHeader[iBufNum].dwBufferLength = iBufferSizeIn * BYTES_PER_SAMPLE;
m_WaveInHeader[iBufNum].dwFlags = 0;
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/* Prepare wave-header */
waveInPrepareHeader(m_WaveIn, &m_WaveInHeader[iBufNum], sizeof(WAVEHDR));
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}
void CSound::InitRecording(int iNewBufferSize, bool bNewBlocking)
{
/* Check if device must be opened or reinitialized */
if (bChangParamIn == TRUE)
{
OpenInDevice();
/* Reset flag */
bChangParamIn = FALSE;
}
/* Set internal parameter */
iBufferSizeIn = iNewBufferSize;
bBlockingRec = bNewBlocking;
/* Reset interface so that all buffers are returned from the interface */
waveInReset(m_WaveIn);
waveInStop(m_WaveIn);
/* Reset current buffer ID (it is important to do this BEFORE calling
"AddInBuffer()" */
iWhichBufferIn = 0;
/* Create memory for sound card buffer */
for (int i = 0; i < iCurNumSndBufIn; i++)
{
/* Unprepare old wave-header in case that we "re-initialized" this
module. Calling "waveInUnprepareHeader()" with an unprepared
buffer (when the module is initialized for the first time) has
simply no effect */
waveInUnprepareHeader(m_WaveIn, &m_WaveInHeader[i], sizeof(WAVEHDR));
if (psSoundcardBuffer[i] != NULL)
delete[] psSoundcardBuffer[i];
psSoundcardBuffer[i] = new short[iBufferSizeIn];
/* Send all buffers to driver for filling the queue ----------------- */
/* Prepare buffers before sending them to the sound interface */
PrepareInBuffer(i);
AddInBuffer();
}
/* Notify that sound capturing can start now */
waveInStart(m_WaveIn);
/* This reset event is very important for initialization, otherwise we will
get errors! */
ResetEvent(m_WaveInEvent);
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}
void CSound::OpenInDevice()
{
/* Open wave-input and set call-back mechanism to event handle */
if (m_WaveIn != NULL)
{
waveInReset(m_WaveIn);
waveInClose(m_WaveIn);
}
MMRESULT result = waveInOpen(&m_WaveIn, iCurInDev, &sWaveFormatEx,
(DWORD) m_WaveInEvent, NULL, CALLBACK_EVENT);
if (result != MMSYSERR_NOERROR)
{
throw CGenErr("Sound Interface Start, waveInOpen() failed. This error "
"usually occurs if another application blocks the sound in.");
}
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}
void CSound::SetInDev(int iNewDev)
{
/* Set device to wave mapper if iNewDev is invalid */
if ((iNewDev >= iNumDevs) || (iNewDev < 0))
iNewDev = WAVE_MAPPER;
/* Change only in case new device id is not already active */
if (iNewDev != iCurInDev)
{
iCurInDev = iNewDev;
bChangParamIn = TRUE;
}
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}
void CSound::SetInNumBuf(int iNewNum)
{
/* check new parameter */
if ((iNewNum >= MAX_SND_BUF_IN) || (iNewNum < 1))
iNewNum = NUM_SOUND_BUFFERS_IN;
/* Change only if parameter is different */
if (iNewNum != iCurNumSndBufIn)
{
iCurNumSndBufIn = iNewNum;
bChangParamIn = TRUE;
}
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}
/******************************************************************************\
* Wave out *
\******************************************************************************/
bool CSound::Write(CVector<short>& psData)
{
int i, j;
int iCntPrepBuf;
int iIndexDoneBuf;
bool bError;
/* Check if device must be opened or reinitialized */
if (bChangParamOut == TRUE)
{
OpenOutDevice();
/* Reinit sound interface */
InitPlayback(iBufferSizeOut, bBlockingPlay);
/* Reset flag */
bChangParamOut = FALSE;
}
/* Get number of "done"-buffers and position of one of them */
GetDoneBuffer(iCntPrepBuf, iIndexDoneBuf);
/* Now check special cases (Buffer is full or empty) */
if (iCntPrepBuf == 0)
{
if (bBlockingPlay == TRUE)
{
/* Blocking wave out routine. Needed for transmitter. Always
ensure that the buffer is completely filled to avoid buffer
underruns */
while (iCntPrepBuf == 0)
{
WaitForSingleObject(m_WaveOutEvent, INFINITE);
GetDoneBuffer(iCntPrepBuf, iIndexDoneBuf);
}
}
else
{
/* All buffers are filled, dump new block ----------------------- */
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// It would be better to kill half of the buffer blocks to set the start
// back to the middle: TODO
return TRUE; /* An error occurred */
}
}
else if (iCntPrepBuf == iCurNumSndBufOut)
{
/* ---------------------------------------------------------------------
Buffer is empty -> send as many cleared blocks to the sound-
interface until half of the buffer size is reached */
/* Send half of the buffer size blocks to the sound-interface */
for (j = 0; j < iCurNumSndBufOut / 2; j++)
{
/* First, clear these buffers */
for (i = 0; i < iBufferSizeOut; i++)
psPlaybackBuffer[j][i] = 0;
/* Then send them to the interface */
AddOutBuffer(j);
}
/* Set index for done buffer */
iIndexDoneBuf = iCurNumSndBufOut / 2;
bError = TRUE;
}
else
bError = FALSE;
/* Copy stereo data from input in soundcard buffer */
for (i = 0; i < iBufferSizeOut; i++)
psPlaybackBuffer[iIndexDoneBuf][i] = psData[i];
/* Now, send the current block */
AddOutBuffer(iIndexDoneBuf);
return bError;
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}
void CSound::GetDoneBuffer(int& iCntPrepBuf, int& iIndexDoneBuf)
{
/* Get number of "done"-buffers and position of one of them */
iCntPrepBuf = 0;
for (int i = 0; i < iCurNumSndBufOut; i++)
{
if (m_WaveOutHeader[i].dwFlags & WHDR_DONE)
{
iCntPrepBuf++;
iIndexDoneBuf = i;
}
}
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}
void CSound::AddOutBuffer(int iBufNum)
{
/* Unprepare old wave-header */
waveOutUnprepareHeader(
m_WaveOut, &m_WaveOutHeader[iBufNum], sizeof(WAVEHDR));
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/* Prepare buffers for sending to sound interface */
PrepareOutBuffer(iBufNum);
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/* Send buffer to driver for filling with new data */
waveOutWrite(m_WaveOut, &m_WaveOutHeader[iBufNum], sizeof(WAVEHDR));
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}
void CSound::PrepareOutBuffer(int iBufNum)
{
/* Set Header data */
m_WaveOutHeader[iBufNum].lpData = (LPSTR) &psPlaybackBuffer[iBufNum][0];
m_WaveOutHeader[iBufNum].dwBufferLength = iBufferSizeOut * BYTES_PER_SAMPLE;
m_WaveOutHeader[iBufNum].dwFlags = 0;
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/* Prepare wave-header */
waveOutPrepareHeader(m_WaveOut, &m_WaveOutHeader[iBufNum], sizeof(WAVEHDR));
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}
void CSound::InitPlayback(int iNewBufferSize, bool bNewBlocking)
{
int i, j;
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/* Check if device must be opened or reinitialized */
if (bChangParamOut == TRUE)
{
OpenOutDevice();
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/* Reset flag */
bChangParamOut = FALSE;
}
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/* Set internal parameters */
iBufferSizeOut = iNewBufferSize;
bBlockingPlay = bNewBlocking;
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/* Reset interface */
waveOutReset(m_WaveOut);
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for (j = 0; j < iCurNumSndBufOut; j++)
{
/* Unprepare old wave-header (in case header was not prepared before,
simply nothing happens with this function call */
waveOutUnprepareHeader(m_WaveOut, &m_WaveOutHeader[j], sizeof(WAVEHDR));
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/* Create memory for playback buffer */
if (psPlaybackBuffer[j] != NULL)
delete[] psPlaybackBuffer[j];
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psPlaybackBuffer[j] = new short[iBufferSizeOut];
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/* Clear new buffer */
for (i = 0; i < iBufferSizeOut; i++)
psPlaybackBuffer[j][i] = 0;
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/* Prepare buffer for sending to the sound interface */
PrepareOutBuffer(j);
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/* Initially, send all buffers to the interface */
AddOutBuffer(j);
}
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}
void CSound::OpenOutDevice()
{
if (m_WaveOut != NULL)
{
waveOutReset(m_WaveOut);
waveOutClose(m_WaveOut);
}
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MMRESULT result = waveOutOpen(&m_WaveOut, iCurOutDev, &sWaveFormatEx,
(DWORD) m_WaveOutEvent, NULL, CALLBACK_EVENT);
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if (result != MMSYSERR_NOERROR)
throw CGenErr("Sound Interface Start, waveOutOpen() failed.");
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}
void CSound::SetOutDev(int iNewDev)
{
/* Set device to wave mapper if iNewDev is invalid */
if ((iNewDev >= iNumDevs) || (iNewDev < 0))
iNewDev = WAVE_MAPPER;
/* Change only in case new device id is not already active */
if (iNewDev != iCurOutDev)
{
iCurOutDev = iNewDev;
bChangParamOut = TRUE;
}
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}
void CSound::SetOutNumBuf(int iNewNum)
{
/* check new parameter */
if ((iNewNum >= MAX_SND_BUF_OUT) || (iNewNum < 1))
iNewNum = NUM_SOUND_BUFFERS_OUT;
/* Change only if parameter is different */
if (iNewNum != iCurNumSndBufOut)
{
iCurNumSndBufOut = iNewNum;
bChangParamOut = TRUE;
}
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}
/******************************************************************************\
* Common *
\******************************************************************************/
void CSound::Close()
{
int i;
MMRESULT result;
/* Reset audio driver */
if (m_WaveOut != NULL)
{
result = waveOutReset(m_WaveOut);
if (result != MMSYSERR_NOERROR)
throw CGenErr("Sound Interface, waveOutReset() failed.");
}
if (m_WaveIn != NULL)
{
result = waveInReset(m_WaveIn);
if (result != MMSYSERR_NOERROR)
throw CGenErr("Sound Interface, waveInReset() failed.");
}
/* Set event to ensure that thread leaves the waiting function */
if (m_WaveInEvent != NULL)
SetEvent(m_WaveInEvent);
/* Wait for the thread to terminate */
Sleep(500);
/* Unprepare wave-headers */
if (m_WaveIn != NULL)
{
for (i = 0; i < iCurNumSndBufIn; i++)
{
result = waveInUnprepareHeader(
m_WaveIn, &m_WaveInHeader[i], sizeof(WAVEHDR));
if (result != MMSYSERR_NOERROR)
{
throw CGenErr("Sound Interface, waveInUnprepareHeader()"
" failed.");
}
}
/* Close the sound in device */
result = waveInClose(m_WaveIn);
if (result != MMSYSERR_NOERROR)
throw CGenErr("Sound Interface, waveInClose() failed.");
}
if (m_WaveOut != NULL)
{
for (i = 0; i < iCurNumSndBufOut; i++)
{
result = waveOutUnprepareHeader(
m_WaveOut, &m_WaveOutHeader[i], sizeof(WAVEHDR));
if (result != MMSYSERR_NOERROR)
{
throw CGenErr("Sound Interface, waveOutUnprepareHeader()"
" failed.");
}
}
/* Close the sound out device */
result = waveOutClose(m_WaveOut);
if (result != MMSYSERR_NOERROR)
throw CGenErr("Sound Interface, waveOutClose() failed.");
}
/* Set flag to open devices the next time it is initialized */
bChangParamIn = TRUE;
bChangParamOut = TRUE;
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}
CSound::CSound()
{
int i;
/* init number of sound buffers */
iCurNumSndBufIn = NUM_SOUND_BUFFERS_IN;
iCurNumSndBufOut = NUM_SOUND_BUFFERS_OUT;
/* Should be initialized because an error can occur during init */
m_WaveInEvent = NULL;
m_WaveOutEvent = NULL;
m_WaveIn = NULL;
m_WaveOut = NULL;
/* Init buffer pointer to zero */
for (i = 0; i < MAX_SND_BUF_IN; i++)
{
memset(&m_WaveInHeader[i], 0, sizeof(WAVEHDR));
psSoundcardBuffer[i] = NULL;
}
for (i = 0; i < MAX_SND_BUF_OUT; i++)
{
memset(&m_WaveOutHeader[i], 0, sizeof(WAVEHDR));
psPlaybackBuffer[i] = NULL;
}
/* Init wave-format structure */
sWaveFormatEx.wFormatTag = WAVE_FORMAT_PCM;
sWaveFormatEx.nChannels = NUM_IN_OUT_CHANNELS;
sWaveFormatEx.wBitsPerSample = BITS_PER_SAMPLE;
sWaveFormatEx.nSamplesPerSec = SND_CRD_SAMPLE_RATE;
sWaveFormatEx.nBlockAlign = sWaveFormatEx.nChannels *
sWaveFormatEx.wBitsPerSample / 8;
sWaveFormatEx.nAvgBytesPerSec = sWaveFormatEx.nBlockAlign *
sWaveFormatEx.nSamplesPerSec;
sWaveFormatEx.cbSize = 0;
/* Get the number of digital audio devices in this computer, check range */
iNumDevs = waveInGetNumDevs();
if (iNumDevs > MAX_NUMBER_SOUND_CARDS)
iNumDevs = MAX_NUMBER_SOUND_CARDS;
/* At least one device must exist in the system */
if (iNumDevs == 0)
throw CGenErr("No audio device found.");
/* Get info about the devices and store the names */
for (i = 0; i < iNumDevs; i++)
{
if (!waveInGetDevCaps(i, &m_WaveInDevCaps, sizeof(WAVEINCAPS)))
pstrDevices[i] = m_WaveInDevCaps.szPname;
}
/* We use an event controlled wave-in (wave-out) structure */
/* Create events */
m_WaveInEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
m_WaveOutEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
/* Set flag to open devices */
bChangParamIn = TRUE;
bChangParamOut = TRUE;
/* Default device number, "wave mapper" */
iCurInDev = WAVE_MAPPER;
iCurOutDev = WAVE_MAPPER;
/* Non-blocking wave out is default */
bBlockingPlay = FALSE;
/* Blocking wave in is default */
bBlockingRec = TRUE;
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}
CSound::~CSound()
{
int i;
/* Delete allocated memory */
for (i = 0; i < iCurNumSndBufIn; i++)
{
if (psSoundcardBuffer[i] != NULL)
delete[] psSoundcardBuffer[i];
}
for (i = 0; i < iCurNumSndBufOut; i++)
{
if (psPlaybackBuffer[i] != NULL)
delete[] psPlaybackBuffer[i];
}
/* Close the handle for the events */
if (m_WaveInEvent != NULL)
CloseHandle(m_WaveInEvent);
if (m_WaveOutEvent != NULL)
CloseHandle(m_WaveOutEvent);
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}