iodev/soundlnx.h

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: soundlnx.h,v 1.11 2008/07/20 08:08:23 vruppert Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //  Copyright (C) 2001  MandrakeSoft S.A.
   6 //
   7 //    MandrakeSoft S.A.
   8 //    43, rue d'Aboukir
   9 //    75002 Paris - France
  10 //    http://www.linux-mandrake.com/
  11 //    http://www.mandrakesoft.com/
  12 //
  13 //  This library is free software; you can redistribute it and/or
  14 //  modify it under the terms of the GNU Lesser General Public
  15 //  License as published by the Free Software Foundation; either
  16 //  version 2 of the License, or (at your option) any later version.
  17 //
  18 //  This library is distributed in the hope that it will be useful,
  19 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 //  Lesser General Public License for more details.
  22 //
  23 //  You should have received a copy of the GNU Lesser General Public
  24 //  License along with this library; if not, write to the Free Software
  25 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26
  27 // Josef Drexler coded the original version of the lowlevel sound support
  28 // for Linux using OSS. The current version also supports OSS on FreeBSD and
  29 // ALSA PCM output on Linux.
  30
  31 #if (defined(linux) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
  32
  33 #define BX_SOUND_LINUX_BUFSIZE   BX_SOUND_OUTPUT_WAVEPACKETSIZE * 2
  34
  35 #if BX_HAVE_ALSASOUND
  36 #define ALSA_PCM_NEW_HW_PARAMS_API
  37 #include <alsa/asoundlib.h>
  38 #endif
  39
  40 class bx_sound_linux_c : public bx_sound_output_c {
  41 public:
  42   bx_sound_linux_c(bx_sb16_c *sb16);
  43   BX_SOUND_VIRTUAL ~bx_sound_linux_c();
  44
  45   // if virtual functions are used, we have to override them
  46   // and define our own. Otherwise this file will just implement
  47   // the original functions
  48 #ifdef BX_USE_SOUND_VIRTUAL
  49   BX_SOUND_VIRTUAL int    waveready();
  50   BX_SOUND_VIRTUAL int    midiready();
  51
  52   BX_SOUND_VIRTUAL int    openmidioutput(char *device);
  53   BX_SOUND_VIRTUAL int    sendmidicommand(int delta, int command, int length, Bit8u data[]);
  54   BX_SOUND_VIRTUAL int    closemidioutput();
  55
  56   BX_SOUND_VIRTUAL int    openwaveoutput(char *device);
  57   BX_SOUND_VIRTUAL int    startwaveplayback(int frequency, int bits, int stereo, int format);
  58   BX_SOUND_VIRTUAL int    sendwavepacket(int length, Bit8u data[]);
  59   BX_SOUND_VIRTUAL int    stopwaveplayback();
  60   BX_SOUND_VIRTUAL int    closewaveoutput();
  61 #endif
  62
  63 private:
  64 #if BX_HAVE_ALSASOUND
  65   int alsa_seq_open(char *device);
  66   int alsa_seq_output(int delta, int command, int length, Bit8u data[]);
  67   int alsa_pcm_open(int frequency, int bits, int stereo, int format);
  68   int alsa_pcm_write();
  69 #endif
  70   bx_sb16_c *sb16;
  71 #if BX_HAVE_ALSASOUND
  72   bx_bool use_alsa_seq;
  73   bx_bool use_alsa_pcm;
  74   struct {
  75     snd_seq_t *handle;
  76     int source_port;
  77   } alsa_seq;
  78   struct {
  79     snd_pcm_t *handle;
  80     snd_pcm_uframes_t frames;
  81   } alsa_pcm;
  82   int dir, alsa_bufsize, audio_bufsize;
  83   char *alsa_buffer;
  84 #endif
  85   FILE *midi;
  86   char *wavedevice;
  87   int wave;
  88   Bit8u audio_buffer[BX_SOUND_LINUX_BUFSIZE];
  89   int oldfreq,oldbits,oldstereo,oldformat;
  90 };
  91
  92 #endif