//  This may look like C code, but it is really -*- C++ -*-

//  ------------------------------------------------------------------
//  The Goldware Library
//  Copyright (C) 1990-1999 Odinn Sorensen
//  Copyright (C) 1999-2000 Alexander S. Aganichev
//  ------------------------------------------------------------------
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library 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
//  Library General Public License for more details.
//
//  You should have received a copy of the GNU Library 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
//  ------------------------------------------------------------------
//  $Id: gsnd.cpp,v 1.4 2002/09/07 13:32:04 asa Exp $
//  ------------------------------------------------------------------
//  Sound class.
//  ------------------------------------------------------------------

#include <cstdio>
#include <cstdlib>
#include <gutlos.h>

#if defined(__MSDOS__)
#include <gmemi86.h>
#include <gmemdbg.h>
#endif

#include <gstrall.h>
#include <gasmamis.h>
#include <gsndall.h>
#include <gfilutil.h>

//  ------------------------------------------------------------------

#ifdef DEBUG
int debug = false;
#endif


//  ------------------------------------------------------------------

gsnd::gsnd() {

  #if defined(__MSDOS__)
  mpx = -1;
  #if (defined(__WATCOMC__) && defined(__386__)) || defined(__DJGPP__)
  buffer = -1;
  #else
  buffer = NULL;
  #endif
  data = NULL;
  #endif

  api_open = false;
  file_open = false;
}


//  ------------------------------------------------------------------

gsnd::~gsnd() {

  if(api_open)
    close_api();

  free_buffer();
}


//  ------------------------------------------------------------------

#if defined(__MSDOS__)
int gsnd::call_api(uint al, uint bx) {

  if(api_open) {
    i86 cpu;
    cpu.al(al);
    cpu.ah(mpx);
    cpu.bx(bx);
    cpu.genint(0x2D);
    return (int)cpu.ax();
  }
  return 0;
}
#endif


//  ------------------------------------------------------------------

void gsnd::free_buffer() {

  #if defined(__MSDOS__)
  #if defined(__DJGPP__) || (defined(__WATCOMC__) && defined(__386__))
  if(buffer != -1) {
    __dpmi_free_dos_memory(buffer);
    buffer = -1;
  }
  #else
  if(buffer) {
    farfree(buffer);
    buffer = NULL;
  }
  #endif
  #endif
}


//  ------------------------------------------------------------------

int gsnd::open_api() {

  #if defined(__MSDOS__)

  i86 cpu;

  // Installation check
  for(mpx=0; mpx<256; mpx++) {
    cpu.ah(mpx);
    cpu.al(GSAPI_INSTALL_CHECK);
    cpu.genint(0x2D);
    if(cpu.al() == 0xFF) {
      #ifdef DEBUG
      if(debug) printf("gsnd: examining signature at %04X:%04X for mpx %u\n", cpu.dx(), cpu.di(), mpx);
      #endif
      amis_signature* signature = (amis_signature*)gmkfp(cpu.dx(), cpu.di());
      #ifdef DEBUG
      if(debug) printf("gsnd: version is %04X\n", cpu.cx());
      if(debug) printf("gsnd: manufacturer is \"%8.8s\"\n", signature->manufacturer);
      if(debug) printf("gsnd: product name is \"%8.8s\"\n", signature->product_name);
      if(debug) printf("gsnd: description  is \"%s\"\n", signature->product_description);
      #endif
      if((cpu.cx() >= 0x0100) and (cpu.cx() < 0x0200))
        if(strnieql(signature->product_name, "GoldSAPI", 8))
          break;
    }
  }

  // Return if not installed
  if(mpx >= 256) {
    mpx = -1;
    return -1;
  }

  // Call the open api function
  cpu.al(GSAPI_OPEN_API);
  cpu.ah(mpx);
  cpu.genint(0x2D);
  if(cpu.al()) {
    #ifdef DEBUG
    if(debug) printf("gsnd: open api returned %02Xh\n", cpu.al());
    #endif
    return cpu.al();
  }
  #ifdef DEBUG
  if(debug) printf("gsnd: using data at %04X:%04X, length %u\n", cpu.dx(), cpu.di(), cpu.cx());
  #endif
  data = (gsapidata*)gmkfp(cpu.dx(), cpu.di());
  key_value = cpu.bx();

  api_open = true;
  return 0;

  #elif defined(GUTLOS_FUNCS)

  api_open = true;
  return 0;

  #else

  api_open = false;
  return -1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::close_api() {

  #if defined(__MSDOS__)

  return call_api(GSAPI_CLOSE_API, key_value);

  #elif defined(GUTLOS_FUNCS)

  if(api_open) {

    if(file_open)
      close();

    api_open = false;
  }

  return 0;

  #else

  return -1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::open(const char* file) {

  #if defined(__MSDOS__)

  strcpy(data->parameters, file);

  try_again:
  int retval = call_api(GSAPI_OPEN_AND_LOAD_FILE);
  switch(retval) {
    case 0x01:
      close();
      goto try_again;
    case 0x02:
      free_buffer();
      #if defined(__DJGPP__) || (defined(__WATCOMC__) && defined(__386__))
      int seg = __dpmi_allocate_dos_memory((data->buffer_length >> 4) + 1, &buffer);
      if(seg == -1)
        return -1;
      data->buffer_segment = seg & 0xffff;
      data->buffer_offset = 0;
      #else
      buffer = (char*)farmalloc(data->buffer_length);
      if(buffer == NULL)
        return false;
      data->buffer_segment = FP_SEG(buffer);
      data->buffer_offset = FP_OFF(buffer);
      #endif
      retval = call_api(GSAPI_OPEN_AND_LOAD_FILE);
  }

  if(retval == 0)
    file_open = true;

  #ifdef DEBUG
  if(debug) printf("gsnd::open: retval = %04X\n", retval);
  #endif

  return retval;

  #elif defined(GUTLOS_FUNCS)

  if(file_open)
    close();

  char buf[GMAXPATH+sizeof("open  alias noise wait")];
  sprintf(buf, "open %s alias noise wait", file);
  if(g_send_mci_string(buf, NULL)) {
    file_open = true;
    return 0;
  }
  return -1;

  #else

  NW(file);
  return -1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::close() {

  #if defined(__MSDOS__)

  if(file_open) {
    file_open = false;
    return call_api(GSAPI_CLOSE_FILE);
  }
  return 1;

  #elif defined(GUTLOS_FUNCS)

  if(file_open) {
    g_send_mci_string("close noise wait", NULL);
    file_open = false;
    return 0;
  }
  return 0xFFFF;

  #else

  return 0xFFFF;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::play(uint sample_rate) {

  #if defined(__MSDOS__)

  return file_open ? call_api(GSAPI_PLAY, sample_rate) : 1;

  #elif defined(GUTLOS_FUNCS)

  NW(sample_rate);

  if(file_open) {
    g_send_mci_string("seek noise to start", NULL);
    g_send_mci_string("play noise", NULL);
    return 0;
  }
  return 1;

  #else

  NW(sample_rate);
  return 1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::stop() {

  #if defined(__MSDOS__)

  return file_open ? call_api(GSAPI_STOP) : 1;

  #elif defined(GUTLOS_FUNCS)

  if(file_open) {
    g_send_mci_string("stop noise wait", NULL);
    return 0;
  }
  return 1;

  #else

  return 1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::pause() {

  #if defined(__MSDOS__)

  return file_open ? call_api(GSAPI_PAUSE) : 1;

  #elif defined(GUTLOS_FUNCS)

  if(file_open) {
    g_send_mci_string("pause noise", NULL);
    return 0;
  }
  return 1;

  #else

  return 1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::resume() {

  #if defined(__MSDOS__)

  return file_open ? call_api(GSAPI_RESUME) : 1;

  #elif defined(GUTLOS_FUNCS)

  if(file_open) {
    g_send_mci_string("resume noise", NULL);
    return 0;
  }
  return 1;

  #else

  return 1;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::break_loop(int method) {

  #if defined(__MSDOS__)

  return file_open ? call_api(GSAPI_BREAK_LOOP, method) : 1;

  #elif defined(GUTLOS_FUNCS)

  NW(method);
  return 0xFFFF;

  #else

  NW(method);
  return 0xFFFF;

  #endif
}



//  ------------------------------------------------------------------

void gsnd::speaker(int onoff) {

  #if defined(__MSDOS__)

  call_api(GSAPI_SPEAKER_ON_OFF, onoff ? 1 : 0);

  #elif defined(GUTLOS_FUNCS)

  // Not implemented
  NW(onoff);

  #else

  NW(onoff);

  #endif
}


//  ------------------------------------------------------------------

uint gsnd::get_sample_rate() {

  #if defined(__MSDOS__)

  return file_open ? data->sample_rate : 0;

  #elif defined(GUTLOS_FUNCS)

  return 0;

  #else

  return 0;

  #endif
}


//  ------------------------------------------------------------------

int gsnd::is_playing() {

  #if defined(__MSDOS__)

  if(file_open)
    return data->status == 0 ? false : true;
  return false;

  #elif defined(GUTLOS_FUNCS)

  char return_buffer[BUFFERSIZE];

  if(g_send_mci_string("status noise mode wait", return_buffer))
    return strieql(return_buffer, "playing") or strieql(return_buffer, "seeking");
  return 0;

  #else

  return 0;

  #endif
}


//  ------------------------------------------------------------------

