fe49c73a6b
- Define new structure bx_pcm_param_t and use it as a parameter for the method
sendwavepacket(). The method startwavepacket() is now called from
sendwavepacket() in case of a parameter change (temporary solution).
- soundsdl: Replaced waveready() call by some more accurate code for buffer
space check in sendwavepacket().
- soundsdl: Moved code for reading from audio buffer to a new function.
- soundsdl: Temporarily increase the audio buffer size.
- Preparing the SB16 code for the OPL emulation port from DOSBox.
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2011-2015 The Bochs Project
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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// Common code for sound lowlevel modules
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// this is the size of a sound packet used for sending and receiving
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// it should not be too large to avoid lag, and not too
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// small to avoid unnecessary overhead.
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#define BX_SOUNDLOW_WAVEPACKETSIZE 8192
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// Definitions for the output functions
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#define BX_SOUNDLOW_OK 0
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#define BX_SOUNDLOW_ERR 1
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// Lowlvel sound modules
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#define BX_SOUNDLOW_DUMMY 0
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#define BX_SOUNDLOW_LINUX 1
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#define BX_SOUNDLOW_OSX 2
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#define BX_SOUNDLOW_WIN 3
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#define BX_SOUNDLOW_SDL 4
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#define BX_SOUNDLOW_ALSA 5
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#define BX_MAX_WAVE_CALLBACKS 3
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typedef struct {
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Bit16u samplerate;
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Bit8u channels;
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Bit8u bits;
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Bit8u format;
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} bx_pcm_param_t;
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typedef Bit32u (*sound_record_handler_t)(void *arg, Bit32u len);
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typedef Bit32u (*get_wave_cb_t)(void *arg, Bit16u rate, Bit8u *buffer, Bit32u len);
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// The class with the input/output functions
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class bx_sound_lowlevel_c : public logfunctions {
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public:
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/*
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These functions are the sound lowlevel functions, sending
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the music or sending/receiving sound to/from the OS specific driver.
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They are in a different file (soundxxx.cc) because they are
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non-portable, while everything in the soundcard code is portable
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*/
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bx_sound_lowlevel_c();
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virtual ~bx_sound_lowlevel_c();
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virtual int get_type() {return BX_SOUNDLOW_DUMMY;}
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virtual int waveready();
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virtual int midiready();
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virtual int openmidioutput(const char *mididev);
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virtual int sendmidicommand(int delta, int command, int length, Bit8u data[]);
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virtual int closemidioutput();
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virtual int openwaveoutput(const char *wavedev);
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virtual int startwaveplayback(int frequency, int bits, bx_bool stereo, int format);
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virtual int sendwavepacket(int length, Bit8u data[], bx_pcm_param_t *param);
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virtual int stopwaveplayback();
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virtual int closewaveoutput();
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virtual int openwaveinput(const char *wavedev, sound_record_handler_t rh);
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virtual int startwaverecord(int frequency, int bits, bx_bool stereo, int format);
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virtual int getwavepacket(int length, Bit8u data[]);
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virtual int stopwaverecord();
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virtual int closewaveinput();
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static void record_timer_handler(void *);
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void record_timer(void);
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virtual int register_wave_callback(void *, get_wave_cb_t wd_cb) {return -1;}
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virtual void unregister_wave_callback(int callback_id) {}
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protected:
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bx_pcm_param_t pcm_param;
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int record_timer_index;
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int record_packet_size;
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sound_record_handler_t record_handler;
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};
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