//
// Copyright Notice
// ================
// BOCHS is Copyright 1994-1999 by Kevin P. Lawton.
//
// BOCHS is commercial software.
//
// This file (SOUNDWIN.CC) written and donated by Josef Drexler
// 
// For more information, read the file 'LICENSE' included in the bochs
// distribution.  If you don't have access to this file, or have questions
// regarding the licensing policy, the author may be contacted via:
//     
//     US Mail:  Kevin Lawton
//               439 Marrett Rd.
//               Lexington, MA 02421-7714
//     
//     EMail:    bochs@world.std.com
//

#if defined(WIN32)

#include "bochs.h"

#define WRITELOG        sb16->writelog
#define BOTHLOG(x)      (x)
#define MIDILOG(x)      ((bx_options.sb16.midimode>0?x:0x7f))
#define WAVELOG(x)      ((bx_options.sb16.wavemode>0?x:0x7f))


bx_sound_windows_c::bx_sound_windows_c(bx_sb16_c *sb16)
  :bx_sound_output_c(sb16)
{
  this->sb16 = sb16;

  MidiOpen = 0;
  WaveOpen = 0;

  ismidiready = 1;
  iswaveready = 1;

  // size is the total size of the midi header and buffer and the
  // BX_SOUND_WINDOWS_NBUF wave header and buffers, all aligned
  // on a 16-byte boundary

#define ALIGN(size) ( (size + 15) & ~15 )

#define size   ALIGN(sizeof(MIDIHDR)) \
	     + ALIGN(sizeof(WAVEHDR)) \
	     + ALIGN(BX_SOUND_WINDOWS_MAXSYSEXLEN) * BX_SOUND_WINDOWS_NBUF \
	     + ALIGN(BX_SOUND_OUTPUT_WAVEPACKETSIZE) * BX_SOUND_WINDOWS_NBUF

  DataHandle = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, size);
  DataPointer = (Bit8u*) GlobalLock(DataHandle);

  if (DataPointer == NULL)
    bx_panic("GlobalLock returned NULL-pointer");

#define NEWBUFFER(size) &(DataPointer[offset]); offset += ALIGN(size)

  int offset = 0;
  MidiHeader = (LPMIDIHDR) NEWBUFFER(sizeof(MIDIHDR));
  MidiData = (LPSTR) NEWBUFFER(BX_SOUND_WINDOWS_MAXSYSEXLEN);

  for (int bufnum=0; bufnum<BX_SOUND_WINDOWS_NBUF; bufnum++)
    {
      WaveHeader[bufnum] = (LPWAVEHDR) NEWBUFFER(sizeof(WAVEHDR));
      WaveData[bufnum] = (LPSTR) NEWBUFFER(BX_SOUND_OUTPUT_WAVEPACKETSIZE);
    }

  if (offset > size)
    bx_panic("Allocated memory was too small!");

#undef size
#undef ALIGN
#undef NEWBUFFER
}

bx_sound_windows_c::~bx_sound_windows_c()
{
  GlobalUnlock(DataHandle);
  GlobalFree(DataHandle);
}

int bx_sound_windows_c::waveready()
{
  if (iswaveready == 0)
    checkwaveready();

  if (iswaveready == 1)
    return BX_SOUND_OUTPUT_OK;
  else
    return BX_SOUND_OUTPUT_ERR;
}
int bx_sound_windows_c::midiready()
{
  if (ismidiready == 0)
    checkmidiready();

  if (ismidiready == 1)
    return BX_SOUND_OUTPUT_OK;
  else
    return BX_SOUND_OUTPUT_ERR;
}

int bx_sound_windows_c::openmidioutput(char *device)
{
  // could make the output device selectable,
  // but currently only the midi mapper is supported
  UNUSED(device);

  UINT deviceid = (UINT) MIDIMAPPER;

  MidiOpen = 0;

  UINT ret = midiOutOpen( &MidiOut, deviceid, NULL, NULL, CALLBACK_NULL);
  if (ret == 0)
    MidiOpen = 1;

  WRITELOG( MIDILOG(4), "midiOutOpen() = %d, MidiOpen: %d", ret, MidiOpen);

  return (MidiOpen == 1) ? BX_SOUND_OUTPUT_OK : BX_SOUND_OUTPUT_ERR;
}

int bx_sound_windows_c::sendmidicommand(int delta, int command, int length, Bit8u data[])
{
  UINT ret;

  if (MidiOpen != 1)
    return BX_SOUND_OUTPUT_ERR;

  if ( (command == 0xf0) || (command == 0xf7) || (length > 3) )
    {
      WRITELOG( WAVELOG(5), "SYSEX started, length %d", length);
      ismidiready = 0;   // until the buffer is done
      memcpy(MidiData, data, length);
      MidiHeader->lpData = MidiData;
      MidiHeader->dwBufferLength = BX_SOUND_WINDOWS_MAXSYSEXLEN;
      MidiHeader->dwBytesRecorded = 0;
      MidiHeader->dwUser = 0;
      MidiHeader->dwFlags = 0;
      ret = midiOutPrepareHeader(MidiOut, MidiHeader, sizeof(*MidiHeader));
      if (ret != 0)
	WRITELOG( MIDILOG(2), "midiOutPrepareHeader() = %d", ret);
      ret = midiOutLongMsg(MidiOut, MidiHeader, sizeof(*MidiHeader));
      if (ret != 0)
	WRITELOG( MIDILOG(2), "midiOutLongMsg() = %d", ret);
    }
  else
    {
      DWORD msg = command;

      for (int i = 0; i<length; i++)
	msg |= (data[i] << (8 * (i + 1) ) );

      ret = midiOutShortMsg(MidiOut, msg);
      WRITELOG( MIDILOG(4), "midiOutShortMsg(%x) = %d", msg, ret);
    }

  return (ret == 0) ? BX_SOUND_OUTPUT_OK : BX_SOUND_OUTPUT_ERR;
}

int bx_sound_windows_c::closemidioutput()
{
  UINT ret;

  if (MidiOpen != 1)
    return BX_SOUND_OUTPUT_ERR;

  ret = midiOutReset(MidiOut);
  if (ismidiready == 0)
    checkmidiready();   // to clear any pending SYSEX

  ret = midiOutClose(MidiOut);
  WRITELOG( MIDILOG(4), "midiOutClose() = %d", ret);
  MidiOpen = 0;

  return (ret == 0) ? BX_SOUND_OUTPUT_OK : BX_SOUND_OUTPUT_ERR;
}

int bx_sound_windows_c::openwaveoutput(char *device)
{
  // could make the output device selectable,
  // but currently only the midi mapper is supported
  UNUSED(device);

  WRITELOG( WAVELOG(4), "openwaveoutput(%s)", device);

#ifdef usewaveOut
  WaveDevice = (UINT) WAVEMAPPER;

  for (int i=0; i<BX_SOUND_WINDOWS_NBUF; i++)
    WaveHeader[i]->dwFlags = WHDR_DONE;

  head = 0;
  tailfull = 0;
  tailplay = 0;
  needreopen = 0;
#endif

  return BX_SOUND_OUTPUT_OK;
}

int bx_sound_windows_c::playnextbuffer()
{
  UINT ret;
  PCMWAVEFORMAT waveformat;
  int bufnum;

  // if the format is different, we have to reopen the device,
  // so reset it first
  if (needreopen != 0)
    if (WaveOpen != 0)
      ret = waveOutReset( WaveOut );

  // clean up the buffers and mark if output is ready
  checkwaveready();

  // do we have to play anything?
  if (tailplay == head)
    return BX_SOUND_OUTPUT_OK;

  // if the format is different, we have to close and reopen the device
  // or, just open the device if it's not open yet
  if ( (needreopen != 0) || (WaveOpen == 0) )
    {
      if (WaveOpen != 0)
	{
	  ret = waveOutClose( WaveOut );
	  WaveOpen = 0;
	}

      // try three times to find a suitable format
      for (int tries = 0; tries < 3; tries++)
	{
	  int frequency = WaveInfo.frequency;
	  int stereo = WaveInfo.stereo;
	  int bits = WaveInfo.bits;
	  int format = WaveInfo.format;
	  int bps = (bits / 8) * (stereo + 1);

	  waveformat.wf.wFormatTag = WAVE_FORMAT_PCM;
	  waveformat.wf.nChannels = stereo + 1;
	  waveformat.wf.nSamplesPerSec = frequency;
	  waveformat.wf.nAvgBytesPerSec = frequency * bps;
	  waveformat.wf.nBlockAlign = bps;
	  waveformat.wBitsPerSample = bits;

	  ret = waveOutOpen( &(WaveOut), WaveDevice, &(waveformat.wf), NULL, NULL, CALLBACK_NULL);
	  if (ret != 0)
	    {
	      char errormsg[4*MAXERRORLENGTH+1];
	      waveOutGetErrorTextA(ret, errormsg, 4*MAXERRORLENGTH+1);
	      WRITELOG( WAVELOG(5), "waveOutOpen: %s", errormsg);
	      switch (tries)
		{
		case 0:	// maybe try a different frequency
		  if (frequency < 15600)
		    frequency = 11025;
		  else if (frequency < 31200)
		    frequency = 22050;
		  else
		    frequency = 44100;

		  WRITELOG( WAVELOG(4), "Couldn't open wave device (error %d), trying frequency %d", ret, frequency);

		  break;
		case 1:	// or something else
		  frequency = 11025;
		  stereo = 0;
		  bits = 8;
		  bps = 1;

		  WRITELOG( WAVELOG(4), "Couldn't open wave device again (error %d), trying 11KHz, mono, 8bit", ret);

		  break;
		case 2:	// nope, doesn't work

		  WRITELOG( WAVELOG(2), "Couldn't open wave device (error %d)!", ret);

		  return BX_SOUND_OUTPUT_ERR;
		}
	      WRITELOG( WAVELOG(5), "The format was: wFormatTag=%d, nChannels=%d, nSamplesPerSec=%d,",
			waveformat.wf.wFormatTag, waveformat.wf.nChannels, waveformat.wf.nSamplesPerSec);
	      WRITELOG( WAVELOG(5), "                nAvgBytesPerSec=%d, nBlockAlign=%d, wBitsPerSample=%d",
			waveformat.wf.nAvgBytesPerSec, waveformat.wf.nBlockAlign, waveformat.wBitsPerSample);

	    }
	  else
	    {
	      WaveOpen = 1;
	      needreopen = 0;
	      break;
	    }
	}
    }

  for (bufnum=tailplay; bufnum != head;
       bufnum++, bufnum &= BX_SOUND_WINDOWS_NMASK, tailplay=bufnum)
    {
      WRITELOG( WAVELOG(5), "Playing buffer %d", bufnum);

      // prepare the wave header
      WaveHeader[bufnum]->lpData = WaveData[bufnum];
      WaveHeader[bufnum]->dwBufferLength = length[bufnum];
      WaveHeader[bufnum]->dwBytesRecorded = length[bufnum];
      WaveHeader[bufnum]->dwUser = 0;
      WaveHeader[bufnum]->dwFlags = 0;
      WaveHeader[bufnum]->dwLoops = 1;

      ret = waveOutPrepareHeader(WaveOut, WaveHeader[bufnum], sizeof(*WaveHeader[bufnum]));
      if (ret != 0)
	{
	  WRITELOG( WAVELOG(2), "waveOutPrepareHeader = %d", ret);
	  return BX_SOUND_OUTPUT_ERR;
	}

      ret = waveOutWrite(WaveOut, WaveHeader[bufnum], sizeof(*WaveHeader[bufnum]));
      if (ret != 0)
	{
	  char errormsg[4*MAXERRORLENGTH+1];
	  waveOutGetErrorTextA(ret, errormsg, 4*MAXERRORLENGTH+1);
	  WRITELOG( WAVELOG(5), "waveOutWrite: %s", errormsg);
	}
    }
}

int bx_sound_windows_c::startwaveplayback(int frequency, int bits, int stereo, int format)
{
  UINT ret;

  WRITELOG( WAVELOG(4), "startwaveplayback(%d, %d, %d, %x)", frequency, bits, stereo, format);

#ifdef usewaveOut
  // check if any of the properties have changed
  if ( (WaveInfo.frequency != frequency) ||
       (WaveInfo.bits != bits) ||
       (WaveInfo.stereo != stereo) ||
       (WaveInfo.format != format) )
    {
      needreopen = 1;

      // store the current settings to be used by sendwavepacket()
      WaveInfo.frequency = frequency;
      WaveInfo.bits = bits;
      WaveInfo.stereo = stereo;
      WaveInfo.format = format;
    }
#endif

#ifdef usesndPlaySnd
  int bps = (bits / 8) * (stereo + 1);
  LPWAVEFILEHEADER header = (LPWAVEFILEHEADER) WaveData;

  memcpy(header->RIFF, "RIFF", 4);
  memcpy(header->TYPE, "WAVE", 4);
  memcpy(header->chnk, "fmt ", 4);
  header->chnklen = 16;
  header->waveformat.wf.wFormatTag = WAVE_FORMAT_PCM;
  header->waveformat.wf.nChannels = stereo + 1;
  header->waveformat.wf.nSamplesPerSec = frequency;
  header->waveformat.wf.nAvgBytesPerSec = frequency * bps;
  header->waveformat.wf.nBlockAlign = bps;
  header->waveformat.wBitsPerSample = bits;
  memcpy(header->chnk2, "data", 4);
#endif

  return BX_SOUND_OUTPUT_OK;
}

int bx_sound_windows_c::sendwavepacket(int length, Bit8u data[])
{
  UINT ret;
  int bufnum;

  WRITELOG( WAVELOG(4), "sendwavepacket(%d, %p)", length, data);

#ifdef usewaveOut
  bufnum = head;

  memcpy(WaveData[bufnum], data, length);
  this->length[bufnum] = length;

  // select next buffer to write to
  bufnum++;
  bufnum &= BX_SOUND_WINDOWS_NMASK;

  if ( ( (bufnum + 1) & BX_SOUND_WINDOWS_NMASK) == tailfull )
    {   // this should not actually happen!
      WRITELOG( WAVELOG(2), "Output buffer overflow! Not played. Iswaveready was %d", iswaveready);
      iswaveready = 0;          // stop the output for a while
      return BX_SOUND_OUTPUT_ERR;
    }

  head = bufnum;

  // check if more buffers are available, otherwise stall the emulator
  if ( ( (bufnum + 2) & BX_SOUND_WINDOWS_NMASK) == tailfull )
    {
      WRITELOG( WAVELOG(5), "Buffer status: Head %d, TailFull %d, TailPlay %d. Stall.",
		head, tailfull, tailplay);
      iswaveready = 0;
    }

  playnextbuffer();

#endif

#ifdef usesndPlaySnd
  LPWAVEFILEHEADER header = (LPWAVEFILEHEADER) WaveData;

  header->length = length + 36;
  header->chnk2len = length;

  memcpy( &(header->data), data, length);

  FILE *test = fopen("test", "a");
  fwrite(WaveData, 1, length + 44, test);
  fclose(test);

  ret = sndPlaySoundA( (LPCSTR) header, SND_SYNC | SND_MEMORY );
  if (ret != 0)
    {
      WRITELOG( WAVELOG(3), "sndPlaySoundA: %d", ret);
    }
#endif

  return BX_SOUND_OUTPUT_OK;
}

int bx_sound_windows_c::stopwaveplayback()
{
  WRITELOG( WAVELOG(4), "stopwaveplayback()");

#ifdef usewaveOut
  // this is handled by checkwaveready() when closing
#endif

#ifdef usesndPlaySnd
  sndPlaySoundA( NULL, SND_ASYNC | SND_MEMORY );

  WaveOpen = 0;
#endif

  return BX_SOUND_OUTPUT_OK;
}

int bx_sound_windows_c::closewaveoutput()
{
  int bufnum;

  WRITELOG( WAVELOG(4), "closewaveoutput");

#ifdef usewaveOut
  if (WaveOpen == 1)
    {
      waveOutReset(WaveOut);

      // let checkwaveready() clean up the buffers
      checkwaveready();

      waveOutClose(WaveOut);

      head = 0;
      tailfull = 0;
      tailplay = 0;
      needreopen = 0;
    }
#endif

  return BX_SOUND_OUTPUT_OK;
}

void bx_sound_windows_c::checkmidiready()
{
  UINT ret;

  if ( (MidiHeader->dwFlags & WHDR_DONE) != 0)
    {
      WRITELOG( MIDILOG(5), "SYSEX message done, midi ready again.");
      ret = midiOutUnprepareHeader( MidiOut, MidiHeader, sizeof(*MidiHeader));
      ismidiready = 1;
    }
}
void bx_sound_windows_c::checkwaveready()
{
  int bufnum;
  UINT ret;

  // clean up all finished buffers and mark them as available
  for (bufnum=tailfull;
       (bufnum != tailplay) &&
	  ( (WaveHeader[bufnum]->dwFlags & WHDR_DONE) != 0);
       bufnum++, bufnum &= BX_SOUND_WINDOWS_NMASK)
    {
      WRITELOG( WAVELOG(5), "Buffer %d done.", bufnum);

      ret = waveOutUnprepareHeader(WaveOut, WaveHeader[bufnum], sizeof(*WaveHeader[bufnum]));
    }

  tailfull = bufnum;

  // enable gathering data if a buffer is available
  if ( ( (head + 2) & BX_SOUND_WINDOWS_NMASK) != tailfull )
    {
      WRITELOG( WAVELOG(5), "Buffer status: Head %d, TailFull %d, TailPlay %d. Ready.",
		head, tailfull, tailplay);
      iswaveready = 1;
    }
}

#endif // defined(WIN32)
