* autoload.cc: Add winmm functions needed by fhandler_dsp.cc.
* fhandler_dsp.cc: New file. Implements OSS like /dev/dsp. * include/sys/soundcard.h: New file. User land includes for OSS /dev/dsp. * fhandler.h: Add new class fhandler_dev_dsp and a FH_OSS_DSP definition. * dtable.cc (dtable::build_fhandler): Allow creation of the /dev/dsp device. * path.cc (windows_device_names): Add /dev/dsp into list of device names. * Makefile.in (DLL_OFILES): Add fhandler_dsp.o.
This commit is contained in:
Christopher Faylor
604
winsup/cygwin/fhandler_dsp.cc
Normal file
604
winsup/cygwin/fhandler_dsp.cc
Normal file
@@ -0,0 +1,604 @@
|
||||
/* fhandler_dev_dsp: code to emulate OSS sound model /dev/dsp
|
||||
|
||||
Copyright 2001 Red Hat, Inc
|
||||
|
||||
Written by Andy Younger (andy@snoogie.demon.co.uk)
|
||||
|
||||
This file is part of Cygwin.
|
||||
|
||||
This software is a copyrighted work licensed under the terms of the
|
||||
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
||||
details. */
|
||||
|
||||
#include "winsup.h"
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include "cygerrno.h"
|
||||
#include "fhandler.h"
|
||||
#include <windows.h>
|
||||
#include <sys/soundcard.h>
|
||||
#include <sys/fcntl.h>
|
||||
#include <mmsystem.h>
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
// Simple encapsulation of the win32 audio device.
|
||||
//
|
||||
static void CALLBACK wave_callback(HWAVE hWave, UINT msg, DWORD instance,
|
||||
DWORD param1, DWORD param2);
|
||||
class Audio
|
||||
{
|
||||
public:
|
||||
enum { MAX_BLOCKS = 8, BLOCK_SIZE = 16384 };
|
||||
|
||||
Audio ();
|
||||
~Audio ();
|
||||
|
||||
bool open (int rate, int bits, int channels, bool bCallback = false);
|
||||
void close ();
|
||||
int getvolume ();
|
||||
void setvolume (int newVolume);
|
||||
bool write (const void *pSampleData, int nBytes);
|
||||
int blocks ();
|
||||
void callback_sampledone (void *pData);
|
||||
|
||||
int numbytesoutput ();
|
||||
|
||||
private:
|
||||
char *initialisebuffer ();
|
||||
void waitforcallback ();
|
||||
bool flush ();
|
||||
|
||||
HWAVEOUT dev_;
|
||||
volatile int nBlocksInQue_;
|
||||
int nBytesWritten_;
|
||||
char *buffer_;
|
||||
int bufferIndex_;
|
||||
CRITICAL_SECTION lock_;
|
||||
char *freeblocks_[MAX_BLOCKS];
|
||||
|
||||
char bigwavebuffer_[MAX_BLOCKS * BLOCK_SIZE];
|
||||
};
|
||||
|
||||
Audio::Audio()
|
||||
{
|
||||
int size = BLOCK_SIZE + sizeof(WAVEHDR);
|
||||
|
||||
InitializeCriticalSection(&lock_);
|
||||
memset(freeblocks_, 0, sizeof(freeblocks_));
|
||||
for (int i = 0; i < MAX_BLOCKS; i++)
|
||||
{
|
||||
char *pBuffer = &bigwavebuffer_[ i * size ];
|
||||
memset(pBuffer, 0, size);
|
||||
freeblocks_[i] = pBuffer;
|
||||
}
|
||||
}
|
||||
|
||||
Audio::~Audio()
|
||||
{
|
||||
if (dev_)
|
||||
close();
|
||||
DeleteCriticalSection(&lock_);
|
||||
}
|
||||
|
||||
bool
|
||||
Audio::open(int rate, int bits, int channels, bool bCallback = false)
|
||||
{
|
||||
WAVEFORMATEX format;
|
||||
int nDevices = waveOutGetNumDevs();
|
||||
|
||||
nBytesWritten_ = 0L;
|
||||
bufferIndex_ = 0;
|
||||
buffer_ = 0L;
|
||||
debug_printf("number devices %d\n", nDevices);
|
||||
if (nDevices <= 0)
|
||||
return false;
|
||||
|
||||
debug_printf("trying to map device freq %d, bits %d, "
|
||||
"channels %d, callback %d\n", rate, bits, channels,
|
||||
bCallback);
|
||||
|
||||
int bytesperSample = bits / 8;
|
||||
|
||||
memset(&format, 0, sizeof(format));
|
||||
format.wFormatTag = WAVE_FORMAT_PCM;
|
||||
format.wBitsPerSample = bits;
|
||||
format.nChannels = channels;
|
||||
format.nSamplesPerSec = rate;
|
||||
format.nAvgBytesPerSec = format.nSamplesPerSec * format.nChannels *
|
||||
bytesperSample;
|
||||
format.nBlockAlign = format.nChannels * bytesperSample;
|
||||
|
||||
nBlocksInQue_ = 0;
|
||||
HRESULT res = waveOutOpen(&dev_, WAVE_MAPPER, &format, (DWORD)wave_callback,
|
||||
(DWORD)this, bCallback ? CALLBACK_FUNCTION : 0);
|
||||
if (res == S_OK)
|
||||
{
|
||||
debug_printf("Sucessfully opened!");
|
||||
return true;
|
||||
}
|
||||
else
|
||||
{
|
||||
debug_printf("failed to open");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
Audio::close()
|
||||
{
|
||||
if (dev_)
|
||||
{
|
||||
flush(); // force out last block whatever size..
|
||||
|
||||
while (blocks()) // block till finished..
|
||||
waitforcallback();
|
||||
|
||||
waveOutReset(dev_);
|
||||
waveOutClose(dev_);
|
||||
dev_ = 0L;
|
||||
}
|
||||
nBytesWritten_ = 0L;
|
||||
}
|
||||
|
||||
int
|
||||
Audio::numbytesoutput()
|
||||
{
|
||||
return nBytesWritten_;
|
||||
}
|
||||
|
||||
int
|
||||
Audio::getvolume()
|
||||
{
|
||||
DWORD volume;
|
||||
|
||||
waveOutGetVolume(dev_, &volume);
|
||||
return ((volume >> 16) + (volume & 0xffff)) >> 1;
|
||||
}
|
||||
|
||||
void
|
||||
Audio::setvolume(int newVolume)
|
||||
{
|
||||
waveOutSetVolume(dev_, (newVolume<<16)|newVolume);
|
||||
}
|
||||
|
||||
char *
|
||||
Audio::initialisebuffer()
|
||||
{
|
||||
EnterCriticalSection(&lock_);
|
||||
WAVEHDR *pHeader = 0L;
|
||||
for (int i = 0; i < MAX_BLOCKS; i++)
|
||||
{
|
||||
char *pData = freeblocks_[i];
|
||||
if (pData)
|
||||
{
|
||||
pHeader = (WAVEHDR *)pData;
|
||||
if (pHeader->dwFlags & WHDR_DONE)
|
||||
{
|
||||
waveOutUnprepareHeader(dev_, pHeader, sizeof(WAVEHDR));
|
||||
}
|
||||
freeblocks_[i] = 0L;
|
||||
break;
|
||||
}
|
||||
}
|
||||
LeaveCriticalSection(&lock_);
|
||||
|
||||
if (pHeader)
|
||||
{
|
||||
memset(pHeader, 0, sizeof(WAVEHDR));
|
||||
pHeader->dwBufferLength = BLOCK_SIZE;
|
||||
pHeader->lpData = (LPSTR)(&pHeader[1]);
|
||||
return (char *)pHeader->lpData;
|
||||
}
|
||||
return 0L;
|
||||
}
|
||||
|
||||
bool
|
||||
Audio::write(const void *pSampleData, int nBytes)
|
||||
{
|
||||
// split up big blocks into smaller BLOCK_SIZE chunks
|
||||
while (nBytes > BLOCK_SIZE)
|
||||
{
|
||||
write(pSampleData, BLOCK_SIZE);
|
||||
nBytes -= BLOCK_SIZE;
|
||||
pSampleData = (void *)((char *)pSampleData + BLOCK_SIZE);
|
||||
}
|
||||
|
||||
// Block till next sound is flushed
|
||||
if (blocks() == MAX_BLOCKS)
|
||||
waitforcallback();
|
||||
|
||||
// Allocate new wave buffer if necessary
|
||||
if (buffer_ == 0L)
|
||||
{
|
||||
buffer_ = initialisebuffer();
|
||||
if (buffer_ == 0L)
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
// Handle gathering blocks into larger buffer
|
||||
int sizeleft = BLOCK_SIZE - bufferIndex_;
|
||||
if (nBytes < sizeleft)
|
||||
{
|
||||
memcpy(&buffer_[bufferIndex_], pSampleData, nBytes);
|
||||
bufferIndex_ += nBytes;
|
||||
nBytesWritten_ += nBytes;
|
||||
return true;
|
||||
}
|
||||
|
||||
// flushing when we reach our limit of BLOCK_SIZE
|
||||
memcpy(&buffer_[bufferIndex_], pSampleData, sizeleft);
|
||||
bufferIndex_ += sizeleft;
|
||||
nBytesWritten_ += sizeleft;
|
||||
flush();
|
||||
|
||||
// change pointer to rest of sample, and size accordingly
|
||||
pSampleData = (void *)((char *)pSampleData + sizeleft);
|
||||
nBytes -= sizeleft;
|
||||
|
||||
// if we still have some sample left over write it out
|
||||
if (nBytes)
|
||||
return write(pSampleData, nBytes);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// return number of blocks back.
|
||||
int
|
||||
Audio::blocks()
|
||||
{
|
||||
EnterCriticalSection(&lock_);
|
||||
int ret = nBlocksInQue_;
|
||||
LeaveCriticalSection(&lock_);
|
||||
return ret;
|
||||
}
|
||||
|
||||
// This is called on an interupt so use locking.. Note nBlocksInQue_ is
|
||||
// modified by it so we should wrap all references to it in locks.
|
||||
void
|
||||
Audio::callback_sampledone(void *pData)
|
||||
{
|
||||
EnterCriticalSection(&lock_);
|
||||
|
||||
nBlocksInQue_--;
|
||||
for (int i = 0; i < MAX_BLOCKS; i++)
|
||||
if (!freeblocks_[i])
|
||||
{
|
||||
freeblocks_[i] = (char *)pData;
|
||||
break;
|
||||
}
|
||||
|
||||
LeaveCriticalSection(&lock_);
|
||||
}
|
||||
|
||||
void
|
||||
Audio::waitforcallback()
|
||||
{
|
||||
int n = blocks();
|
||||
if (!n)
|
||||
return;
|
||||
do
|
||||
{
|
||||
Sleep(250);
|
||||
}
|
||||
while (n == blocks());
|
||||
}
|
||||
|
||||
bool
|
||||
Audio::flush()
|
||||
{
|
||||
if (!buffer_)
|
||||
return false;
|
||||
|
||||
// Send internal buffer out to the soundcard
|
||||
WAVEHDR *pHeader = ((WAVEHDR *)buffer_) - 1;
|
||||
pHeader->dwBufferLength = bufferIndex_;
|
||||
if (waveOutPrepareHeader(dev_, pHeader, sizeof(WAVEHDR)) == S_OK &&
|
||||
waveOutWrite(dev_, pHeader, sizeof (WAVEHDR)) == S_OK)
|
||||
{
|
||||
EnterCriticalSection(&lock_);
|
||||
nBlocksInQue_++;
|
||||
LeaveCriticalSection(&lock_);
|
||||
bufferIndex_ = 0;
|
||||
buffer_ = 0L;
|
||||
return true;
|
||||
}
|
||||
else
|
||||
{
|
||||
EnterCriticalSection(&lock_);
|
||||
for (int i = 0; i < MAX_BLOCKS; i++)
|
||||
if (!freeblocks_[i])
|
||||
{
|
||||
freeblocks_[i] = (char *)pHeader;
|
||||
break;
|
||||
}
|
||||
LeaveCriticalSection(&lock_);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
// Call back routine
|
||||
static void CALLBACK
|
||||
wave_callback(HWAVE hWave, UINT msg, DWORD instance, DWORD param1, DWORD param2)
|
||||
{
|
||||
if (msg == WOM_DONE)
|
||||
{
|
||||
Audio *ptr = (Audio *)instance;
|
||||
ptr->callback_sampledone((void *)param1);
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
// /dev/dsp handler
|
||||
static Audio s_audio; // static instance of the Audio handler
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
// wav file detection..
|
||||
#pragma pack(1)
|
||||
struct wavchunk
|
||||
{
|
||||
char id[4];
|
||||
unsigned int len;
|
||||
};
|
||||
struct wavformat
|
||||
{
|
||||
unsigned short wFormatTag;
|
||||
unsigned short wChannels;
|
||||
unsigned int dwSamplesPerSec;
|
||||
unsigned int dwAvgBytesPerSec;
|
||||
unsigned short wBlockAlign;
|
||||
unsigned short wBitsPerSample;
|
||||
};
|
||||
#pragma pack()
|
||||
|
||||
bool
|
||||
fhandler_dev_dsp::setupwav(const char *pData, int nBytes)
|
||||
{
|
||||
int len;
|
||||
const char *end = pData + nBytes;
|
||||
|
||||
if (!(pData[0] == 'R' && pData[1] == 'I' &&
|
||||
pData[2] == 'F' && pData[3] == 'F'))
|
||||
return false;
|
||||
if (!(pData[8] == 'W' && pData[9] == 'A' &&
|
||||
pData[10] == 'V' && pData[11] == 'E'))
|
||||
return false;
|
||||
|
||||
len = *(int *)&pData[4];
|
||||
pData += 12;
|
||||
while (len && pData < end)
|
||||
{
|
||||
wavchunk *pChunk = (wavchunk *)pData;
|
||||
int blklen = pChunk->len;
|
||||
if (pChunk->id[0] == 'f' && pChunk->id[1] == 'm' &&
|
||||
pChunk->id[2] == 't' && pChunk->id[3] == ' ')
|
||||
{
|
||||
wavformat *format = (wavformat *)(pChunk+1);
|
||||
if ((char *)(format+1) > end)
|
||||
return false;
|
||||
|
||||
// Open up audio device with correct frequency for wav file
|
||||
//
|
||||
// FIXME: should through away all the header & not output
|
||||
// it to the soundcard.
|
||||
s_audio.close();
|
||||
if (s_audio.open(format->dwSamplesPerSec, format->wBitsPerSample,
|
||||
format->wChannels) == false)
|
||||
{
|
||||
s_audio.open(audiofreq_, audiobits_, audiochannels_);
|
||||
}
|
||||
else
|
||||
{
|
||||
audiofreq_ = format->dwSamplesPerSec;
|
||||
audiobits_ = format->wBitsPerSample;
|
||||
audiochannels_ = format->wChannels;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
pData += blklen + sizeof(wavchunk);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
fhandler_dev_dsp::fhandler_dev_dsp (const char *name)
|
||||
: fhandler_base (FH_OSS_DSP, name)
|
||||
{
|
||||
set_cb (sizeof *this);
|
||||
}
|
||||
|
||||
fhandler_dev_dsp::~fhandler_dev_dsp()
|
||||
{
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::open (const char *path, int flags, mode_t mode = 0)
|
||||
{
|
||||
// currently we only support writing
|
||||
if ((flags & (O_WRONLY|O_RDONLY|O_RDWR)) != O_WRONLY)
|
||||
return 0;
|
||||
|
||||
set_flags(flags);
|
||||
|
||||
// Work out initial sample format & frequency
|
||||
if (strcmp(path, "/dev/dsp") == 0L)
|
||||
{
|
||||
// dev/dsp defaults
|
||||
audioformat_ = AFMT_S8;
|
||||
audiofreq_ = 8000;
|
||||
audiobits_ = 8;
|
||||
audiochannels_ = 1;
|
||||
}
|
||||
|
||||
if (s_audio.open(audiofreq_, audiobits_, audiochannels_))
|
||||
debug_printf("/dev/dsp: successfully opened\n");
|
||||
else
|
||||
debug_printf("/dev/dsp: failed to open\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::write (const void *ptr, size_t len)
|
||||
{
|
||||
if (s_audio.numbytesoutput() == 0)
|
||||
{
|
||||
// check for wave file & setup frequencys properly if possible.
|
||||
setupwav((const char *)ptr, len);
|
||||
|
||||
// Open audio device properly with callbacks.
|
||||
s_audio.close();
|
||||
if (!s_audio.open(audiofreq_, audiobits_, audiochannels_, true))
|
||||
return 0;
|
||||
}
|
||||
|
||||
s_audio.write(ptr, len);
|
||||
return len;
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::read (void *ptr, size_t len)
|
||||
{
|
||||
return len;
|
||||
}
|
||||
|
||||
off_t
|
||||
fhandler_dev_dsp::lseek (off_t offset, int whence)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::close (void)
|
||||
{
|
||||
s_audio.close();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::dup (fhandler_base * child)
|
||||
{
|
||||
fhandler_dev_dsp *fhc = (fhandler_dev_dsp *)child;
|
||||
|
||||
fhc->set_flags(get_flags());
|
||||
fhc->audiochannels_ = audiochannels_;
|
||||
fhc->audiobits_ = audiobits_;
|
||||
fhc->audiofreq_ = audiofreq_;
|
||||
fhc->audioformat_ = audioformat_;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
fhandler_dev_dsp::ioctl(unsigned int cmd, void *ptr)
|
||||
{
|
||||
int *intptr = (int *)ptr;
|
||||
switch (cmd)
|
||||
{
|
||||
#define CASE(a) case a : debug_printf("/dev/dsp: ioctl %s\n", #a);
|
||||
|
||||
CASE(SNDCTL_DSP_RESET)
|
||||
audioformat_ = AFMT_S8;
|
||||
audiofreq_ = 8000;
|
||||
audiobits_ = 8;
|
||||
audiochannels_ = 1;
|
||||
return 1;
|
||||
|
||||
CASE(SNDCTL_DSP_GETBLKSIZE)
|
||||
*intptr = Audio::BLOCK_SIZE;
|
||||
break;
|
||||
|
||||
CASE(SNDCTL_DSP_SETFMT)
|
||||
{
|
||||
int nBits = 0;
|
||||
if (*intptr == AFMT_S16_LE)
|
||||
nBits = 16;
|
||||
else if (*intptr == AFMT_S8)
|
||||
nBits = 8;
|
||||
if (nBits)
|
||||
{
|
||||
s_audio.close();
|
||||
if (s_audio.open(audiofreq_, nBits, audiochannels_) == true)
|
||||
{
|
||||
audiobits_ = nBits;
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
s_audio.open(audiofreq_, audiobits_, audiochannels_);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
} break;
|
||||
|
||||
CASE(SNDCTL_DSP_SPEED)
|
||||
s_audio.close();
|
||||
if (s_audio.open(*intptr, audiobits_, audiochannels_) == true)
|
||||
{
|
||||
audiofreq_ = *intptr;
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
s_audio.open(audiofreq_, audiobits_, audiochannels_);
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
|
||||
CASE(SNDCTL_DSP_STEREO)
|
||||
{
|
||||
int nChannels = *intptr + 1;
|
||||
|
||||
s_audio.close();
|
||||
if (s_audio.open(audiofreq_, audiobits_, nChannels) == true)
|
||||
{
|
||||
audiochannels_ = nChannels;
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
s_audio.open(audiofreq_, audiobits_, audiochannels_);
|
||||
return -1;
|
||||
}
|
||||
} break;
|
||||
|
||||
CASE(SNDCTL_DSP_GETOSPACE)
|
||||
{
|
||||
audio_buf_info *p = (audio_buf_info *)ptr;
|
||||
|
||||
int nBlocks = s_audio.blocks();
|
||||
int leftblocks = ((Audio::MAX_BLOCKS - nBlocks)-1);
|
||||
if (leftblocks < 0) leftblocks = 0;
|
||||
if (leftblocks > 1)
|
||||
leftblocks = 1;
|
||||
int left = leftblocks * Audio::BLOCK_SIZE;
|
||||
|
||||
p->fragments = leftblocks;
|
||||
p->fragstotal = Audio::MAX_BLOCKS;
|
||||
p->fragsize = Audio::BLOCK_SIZE;
|
||||
p->bytes = left;
|
||||
|
||||
debug_printf("ptr: %p "
|
||||
"nblocks: %d "
|
||||
"leftblocks: %d "
|
||||
"left bytes: %d ", ptr, nBlocks, leftblocks, left);
|
||||
|
||||
|
||||
return 1;
|
||||
} break;
|
||||
|
||||
default:
|
||||
debug_printf("/dev/dsp: ioctl not handled yet! FIXME:\n");
|
||||
break;
|
||||
|
||||
#undef CASE
|
||||
};
|
||||
return -1;
|
||||
}
|
||||
|
||||
void
|
||||
fhandler_dev_dsp::dump ()
|
||||
{
|
||||
paranoid_printf("here, fhandler_dev_dsp");
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user