Bochs/bochs/iodev/sound/soundlow.h

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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2011-2017 The Bochs Project
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
// Common code for sound lowlevel modules
#ifndef WIN32
#include <pthread.h>
#endif
#if BX_HAVE_LIBSAMPLERATE
#include <samplerate.h>
#elif BX_HAVE_SOXR_LSR
#include <soxr-lsr.h>
#endif
// This is the maximum size of a wave data packet.
// It should be large enough for 0.1 seconds of playback or recording.
#define BX_SOUNDLOW_WAVEPACKETSIZE 19200
// Definitions for the output functions
#define BX_SOUNDLOW_OK 0
#define BX_SOUNDLOW_ERR 1
#define BX_MAX_WAVE_CALLBACKS 3
typedef struct {
Bit16u samplerate;
Bit8u bits;
Bit8u channels;
Bit8u format;
Bit16u volume;
} bx_pcm_param_t;
const bx_pcm_param_t default_pcm_param = { 44100, 16, 2, 1, 0xffff };
typedef Bit32u (*sound_record_handler_t)(void *arg, Bit32u len);
typedef Bit32u (*get_wave_cb_t)(void *arg, Bit16u rate, Bit8u *buffer, Bit32u len);
// audio buffer support
#define BUFTYPE_FLOAT 0
#define BUFTYPE_UCHAR 1
typedef struct _audio_buffer_t
{
Bit32u size, pos;
union {
Bit8u *data;
float *fdata;
};
bx_pcm_param_t param;
struct _audio_buffer_t *next;
} audio_buffer_t;
class bx_audio_buffer_c {
public:
bx_audio_buffer_c(Bit8u format);
~bx_audio_buffer_c();
audio_buffer_t *new_buffer(Bit32u size);
audio_buffer_t *get_buffer();
void delete_buffer();
private:
Bit8u format;
audio_buffer_t *root;
};
extern bx_audio_buffer_c *audio_buffers[2];
void convert_float_to_s16le(float *src, unsigned srcsize, Bit8u *dst);
Bit32u pcm_callback(void *dev, Bit16u rate, Bit8u *buffer, Bit32u len);
extern int resampler_control;
extern int mixer_control;
extern BX_MUTEX(resampler_mutex);
#ifndef ANDROID
extern BX_MUTEX(mixer_mutex);
#endif
// the waveout class
class bx_soundlow_waveout_c : public logfunctions {
public:
bx_soundlow_waveout_c();
virtual ~bx_soundlow_waveout_c();
virtual int openwaveoutput(const char *wavedev);
virtual int set_pcm_params(bx_pcm_param_t *param);
virtual int sendwavepacket(int length, Bit8u data[], bx_pcm_param_t *src_param);
virtual int get_packetsize();
virtual int output(int length, Bit8u data[]);
virtual int closewaveoutput();
virtual int register_wave_callback(void *, get_wave_cb_t wd_cb);
virtual void unregister_wave_callback(int callback_id);
virtual void resampler(audio_buffer_t *inbuffer, audio_buffer_t *outbuffer);
virtual bx_bool mixer_common(Bit8u *buffer, int len);
protected:
void start_resampler_thread(void);
void start_mixer_thread(void);
Bit32u resampler_common(audio_buffer_t *inbuffer, float **fbuffer);
bx_pcm_param_t real_pcm_param;
#if BX_HAVE_LIBSAMPLERATE || BX_HAVE_SOXR_LSR
SRC_STATE *src_state;
#endif
int cb_count;
struct {
void *device;
get_wave_cb_t cb;
} get_wave[BX_MAX_WAVE_CALLBACKS];
int pcm_callback_id;
};
// the wavein class
class bx_soundlow_wavein_c : public logfunctions {
public:
bx_soundlow_wavein_c();
virtual ~bx_soundlow_wavein_c();
virtual int openwaveinput(const char *wavedev, sound_record_handler_t rh);
virtual int startwaverecord(bx_pcm_param_t *param);
virtual int getwavepacket(int length, Bit8u data[]);
virtual int stopwaverecord();
static void record_timer_handler(void *);
void record_timer(void);
protected:
int record_timer_index;
int record_packet_size;
sound_record_handler_t record_handler;
};
// the midiout class
class bx_soundlow_midiout_c : public logfunctions {
public:
bx_soundlow_midiout_c();
virtual ~bx_soundlow_midiout_c();
virtual int openmidioutput(const char *mididev);
virtual int midiready();
virtual int sendmidicommand(int delta, int command, int length, Bit8u data[]);
virtual int closemidioutput();
};
// This is the base class of the sound lowlevel support.
// the lowlevel sound driver class returns pointers to the child objects
class bx_sound_lowlevel_c : public logfunctions {
public:
bx_sound_lowlevel_c();
virtual ~bx_sound_lowlevel_c();
virtual bx_soundlow_waveout_c* get_waveout() {return NULL;}
virtual bx_soundlow_wavein_c* get_wavein() {return NULL;}
virtual bx_soundlow_midiout_c* get_midiout() {return NULL;}
protected:
bx_soundlow_waveout_c *waveout;
bx_soundlow_wavein_c *wavein;
bx_soundlow_midiout_c *midiout;
};
// the dummy sound driver contains stubs for all features
class bx_sound_dummy_c : public bx_sound_lowlevel_c {
public:
bx_sound_dummy_c() {}
virtual ~bx_sound_dummy_c() {}
virtual bx_soundlow_waveout_c* get_waveout();
virtual bx_soundlow_wavein_c* get_wavein();
virtual bx_soundlow_midiout_c* get_midiout();
};