src/MacOSX/audio_macosx.cpp

/*
 *  audio_macosx.cpp - Audio support, implementation Mac OS X
 *  Copyright (C) 2006, Daniel Sumorok
 *
 *  Basilisk II (C) 1997-2005 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU 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
 */

#include "sysdeps.h"

#include <sys/ioctl.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>

#include "cpu_emulation.h"
#include "main.h"
#include "prefs.h"
#include "user_strings.h"
#include "audio.h"
#include "audio_defs.h"
#include "MacOSX_sound_if.h"

#define DEBUG 0
#include "debug.h"


// The currently selected audio parameters (indices in
// audio_sample_rates[] etc. vectors)
static int audio_sample_rate_index = 0;
static int audio_sample_size_index = 0;
static int audio_channel_count_index = 0;

// Prototypes
static OSXsoundOutput *soundOutput = NULL;
static bool main_mute = false;
static bool speaker_mute = false;

/*
 *  Initialization
 */
static int audioInt(void);

static bool open_audio(void)
{
        AudioStatus.sample_rate = audio_sample_rates[audio_sample_rate_index];
        AudioStatus.sample_size = audio_sample_sizes[audio_sample_size_index];
        AudioStatus.channels = audio_channel_counts[audio_channel_count_index];

        if (soundOutput)
                delete soundOutput;

        soundOutput = new OSXsoundOutput();
        soundOutput->start(AudioStatus.sample_size, AudioStatus.channels, 
                                           AudioStatus.sample_rate >> 16);
        soundOutput->setCallback(audioInt);
        audio_frames_per_block = soundOutput->bufferSizeFrames();

        audio_open = true;
        return true;
}

void AudioInit(void)
{
        // Sound disabled in prefs? Then do nothing
        if (PrefsFindBool("nosound"))
                return;

        //audio_sample_sizes.push_back(8);
        audio_sample_sizes.push_back(16);

        audio_channel_counts.push_back(1);
        audio_channel_counts.push_back(2);
        
        audio_sample_rates.push_back(11025 << 16);
        audio_sample_rates.push_back(22050 << 16);
        audio_sample_rates.push_back(44100 << 16);

        // Default to highest supported values
        audio_sample_rate_index   = audio_sample_rates.size() - 1;
        audio_sample_size_index   = audio_sample_sizes.size() - 1;
        audio_channel_count_index = audio_channel_counts.size() - 1;

        AudioStatus.mixer = 0;
        AudioStatus.num_sources = 0;
        audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut;
        audio_component_flags = 0;

        open_audio();
}


/*
 *  Deinitialization
 */

static void close_audio(void)
{
        D(bug("Closing Audio\n"));

        if (soundOutput)
        {
                delete soundOutput;
                soundOutput = NULL;
        }
        
        audio_open = false;
}

void AudioExit(void)
{
        // Close audio device
        close_audio();
}


/*
 *  First source added, start audio stream
 */

void audio_enter_stream()
{
        // Streaming thread is always running to avoid clicking noises
}


/*
 *  Last source removed, stop audio stream
 */

void audio_exit_stream()
{
        // Streaming thread is always running to avoid clicking noises
}


/*
 *  MacOS audio interrupt, read next data block
 */

void AudioInterrupt(void)
{
        D(bug("AudioInterrupt\n"));
        uint32 apple_stream_info;
        uint32 numSamples;
        int16 *p;
        M68kRegisters r;

        if (!AudioStatus.mixer)
        {
                numSamples = 0;
                soundOutput->sendAudioBuffer((void *)p, (int)numSamples);
                D(bug("AudioInterrupt done\n"));
                return;
        }

        // Get data from apple mixer
        r.a[0] = audio_data + adatStreamInfo;
        r.a[1] = AudioStatus.mixer;
        Execute68k(audio_data + adatGetSourceData, &r);
        D(bug(" GetSourceData() returns %08lx\n", r.d[0]));

        apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
        if (apple_stream_info && (main_mute == false) && (speaker_mute == false))
        {
                numSamples = ReadMacInt32(apple_stream_info + scd_sampleCount);
                p = (int16 *)Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer));
        }
        else
        {
                numSamples = 0;
                p = NULL;
        }

        soundOutput->sendAudioBuffer((void *)p, (int)numSamples);

        D(bug("AudioInterrupt done\n"));
}


/*
 *  Set sampling parameters
 *  "index" is an index into the audio_sample_rates[] etc. vectors
 *  It is guaranteed that AudioStatus.num_sources == 0
 */

bool audio_set_sample_rate(int index)
{
        close_audio();
        audio_sample_rate_index = index;
        return open_audio();
}

bool audio_set_sample_size(int index)
{
        close_audio();
        audio_sample_size_index = index;
        return open_audio();
}

bool audio_set_channels(int index)
{
        close_audio();
        audio_channel_count_index = index;
        return open_audio();
}

/*
 *  Get/set volume controls (volume values received/returned have the
 *  left channel volume in the upper 16 bits and the right channel
 *  volume in the lower 16 bits; both volumes are 8.8 fixed point
 *  values with 0x0100 meaning "maximum volume"))
 */
bool audio_get_main_mute(void)
{
        return main_mute;
}

uint32 audio_get_main_volume(void)
{
        return 0x01000100;
}

bool audio_get_speaker_mute(void)
{
        return speaker_mute;
}

uint32 audio_get_speaker_volume(void)
{
        return 0x01000100;
}

void audio_set_main_mute(bool mute)
{
        main_mute = mute;
}

void audio_set_main_volume(uint32 vol)
{
}

void audio_set_speaker_mute(bool mute)
{
        speaker_mute = mute;
}

void audio_set_speaker_volume(uint32 vol)
{
}

static int audioInt(void)
{
        SetInterruptFlag(INTFLAG_AUDIO);
        TriggerInterrupt();
        return 0;
}
Revision:	1.5
Committed:	2006-08-01T03:31:46Z (18 years, 3 months ago) by nigel
Branch:	MAIN
Changes since 1.4:	+1 -1 lines
Log Message:	Do'h. Checked in and shipped a DEBUG=1. Thanks to Steve Green for his fast eyes.
#	User	Rev	Content
1	nigel	1.1	/*
2	nigel	1.4	* audio_macosx.cpp - Audio support, implementation Mac OS X
3			* Copyright (C) 2006, Daniel Sumorok
4	nigel	1.1	*
5	gbeauche	1.3	* Basilisk II (C) 1997-2005 Christian Bauer
6	nigel	1.1	*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20			*/
21
22			#include "sysdeps.h"
23	nigel	1.4
24			#include <sys/ioctl.h>
25			#include <unistd.h>
26			#include <errno.h>
27			#include <pthread.h>
28			#include <semaphore.h>
29
30			#include "cpu_emulation.h"
31			#include "main.h"
32	nigel	1.1	#include "prefs.h"
33	nigel	1.4	#include "user_strings.h"
34	nigel	1.1	#include "audio.h"
35			#include "audio_defs.h"
36	nigel	1.4	#include "MacOSX_sound_if.h"
37	nigel	1.1
38	nigel	1.5	#define DEBUG 0
39	nigel	1.1	#include "debug.h"
40
41
42	nigel	1.4	// The currently selected audio parameters (indices in
43			// audio_sample_rates[] etc. vectors)
44			static int audio_sample_rate_index = 0;
45			static int audio_sample_size_index = 0;
46			static int audio_channel_count_index = 0;
47
48			// Prototypes
49			static OSXsoundOutput *soundOutput = NULL;
50			static bool main_mute = false;
51			static bool speaker_mute = false;
52	nigel	1.1
53			/*
54			* Initialization
55			*/
56	nigel	1.4	static int audioInt(void);
57	nigel	1.1
58	nigel	1.4	static bool open_audio(void)
59	nigel	1.1	{
60	nigel	1.4	AudioStatus.sample_rate = audio_sample_rates[audio_sample_rate_index];
61			AudioStatus.sample_size = audio_sample_sizes[audio_sample_size_index];
62			AudioStatus.channels = audio_channel_counts[audio_channel_count_index];
63	nigel	1.1
64	nigel	1.4	if (soundOutput)
65			delete soundOutput;
66
67			soundOutput = new OSXsoundOutput();
68			soundOutput->start(AudioStatus.sample_size, AudioStatus.channels,
69			AudioStatus.sample_rate >> 16);
70			soundOutput->setCallback(audioInt);
71			audio_frames_per_block = soundOutput->bufferSizeFrames();
72	nigel	1.1
73	nigel	1.4	audio_open = true;
74			return true;
75			}
76	nigel	1.1
77	nigel	1.4	void AudioInit(void)
78			{
79	nigel	1.1	// Sound disabled in prefs? Then do nothing
80			if (PrefsFindBool("nosound"))
81			return;
82
83	nigel	1.4	//audio_sample_sizes.push_back(8);
84			audio_sample_sizes.push_back(16);
85	nigel	1.1
86	nigel	1.4	audio_channel_counts.push_back(1);
87			audio_channel_counts.push_back(2);
88
89			audio_sample_rates.push_back(11025 << 16);
90			audio_sample_rates.push_back(22050 << 16);
91			audio_sample_rates.push_back(44100 << 16);
92	nigel	1.1
93	nigel	1.4	// Default to highest supported values
94			audio_sample_rate_index = audio_sample_rates.size() - 1;
95			audio_sample_size_index = audio_sample_sizes.size() - 1;
96			audio_channel_count_index = audio_channel_counts.size() - 1;
97	nigel	1.1
98	nigel	1.4	AudioStatus.mixer = 0;
99			AudioStatus.num_sources = 0;
100			audio_component_flags = cmpWantsRegisterMessage \| kStereoOut \| k16BitOut;
101			audio_component_flags = 0;
102	nigel	1.1
103	nigel	1.4	open_audio();
104	nigel	1.1	}
105
106
107			/*
108			* Deinitialization
109			*/
110
111	nigel	1.4	static void close_audio(void)
112			{
113			D(bug("Closing Audio\n"));
114
115			if (soundOutput)
116			{
117			delete soundOutput;
118			soundOutput = NULL;
119			}
120
121			audio_open = false;
122			}
123
124	nigel	1.1	void AudioExit(void)
125			{
126	nigel	1.4	// Close audio device
127			close_audio();
128	nigel	1.1	}
129
130
131			/*
132			* First source added, start audio stream
133			*/
134
135			void audio_enter_stream()
136			{
137	nigel	1.4	// Streaming thread is always running to avoid clicking noises
138	nigel	1.1	}
139
140
141			/*
142			* Last source removed, stop audio stream
143			*/
144
145			void audio_exit_stream()
146			{
147	nigel	1.4	// Streaming thread is always running to avoid clicking noises
148	nigel	1.1	}
149
150
151			/*
152			* MacOS audio interrupt, read next data block
153			*/
154
155			void AudioInterrupt(void)
156			{
157			D(bug("AudioInterrupt\n"));
158	nigel	1.4	uint32 apple_stream_info;
159			uint32 numSamples;
160			int16 *p;
161			M68kRegisters r;
162
163			if (!AudioStatus.mixer)
164			{
165			numSamples = 0;
166			soundOutput->sendAudioBuffer((void *)p, (int)numSamples);
167			D(bug("AudioInterrupt done\n"));
168			return;
169			}
170
171			// Get data from apple mixer
172			r.a[0] = audio_data + adatStreamInfo;
173			r.a[1] = AudioStatus.mixer;
174			Execute68k(audio_data + adatGetSourceData, &r);
175			D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
176
177			apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
178			if (apple_stream_info && (main_mute == false) && (speaker_mute == false))
179			{
180			numSamples = ReadMacInt32(apple_stream_info + scd_sampleCount);
181			p = (int16 *)Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer));
182			}
183			else
184			{
185			numSamples = 0;
186			p = NULL;
187			}
188
189			soundOutput->sendAudioBuffer((void *)p, (int)numSamples);
190
191			D(bug("AudioInterrupt done\n"));
192	nigel	1.1	}
193
194
195			/*
196			* Set sampling parameters
197			* "index" is an index into the audio_sample_rates[] etc. vectors
198			* It is guaranteed that AudioStatus.num_sources == 0
199			*/
200
201			bool audio_set_sample_rate(int index)
202			{
203	nigel	1.4	close_audio();
204			audio_sample_rate_index = index;
205			return open_audio();
206	nigel	1.1	}
207
208			bool audio_set_sample_size(int index)
209			{
210	nigel	1.4	close_audio();
211			audio_sample_size_index = index;
212			return open_audio();
213	nigel	1.1	}
214
215			bool audio_set_channels(int index)
216			{
217	nigel	1.4	close_audio();
218			audio_channel_count_index = index;
219			return open_audio();
220	nigel	1.1	}
221
222			/*
223	nigel	1.4	* Get/set volume controls (volume values received/returned have the
224			* left channel volume in the upper 16 bits and the right channel
225			* volume in the lower 16 bits; both volumes are 8.8 fixed point
226			* values with 0x0100 meaning "maximum volume"))
227	nigel	1.1	*/
228			bool audio_get_main_mute(void)
229			{
230	nigel	1.4	return main_mute;
231	nigel	1.1	}
232
233			uint32 audio_get_main_volume(void)
234			{
235			return 0x01000100;
236			}
237
238			bool audio_get_speaker_mute(void)
239			{
240	nigel	1.4	return speaker_mute;
241	nigel	1.1	}
242
243			uint32 audio_get_speaker_volume(void)
244			{
245			return 0x01000100;
246			}
247
248			void audio_set_main_mute(bool mute)
249			{
250	nigel	1.4	main_mute = mute;
251	nigel	1.1	}
252
253			void audio_set_main_volume(uint32 vol)
254			{
255			}
256
257			void audio_set_speaker_mute(bool mute)
258			{
259	nigel	1.4	speaker_mute = mute;
260	nigel	1.1	}
261
262			void audio_set_speaker_volume(uint32 vol)
263			{
264			}
265	nigel	1.4
266			static int audioInt(void)
267			{
268			SetInterruptFlag(INTFLAG_AUDIO);
269			TriggerInterrupt();
270			return 0;
271			}