src/BeOS/audio_beos.cpp

/*
 *  audio_beos.cpp - Audio support, BeOS implementation
 *
 *  Basilisk II (C) 1997-2002 Christian Bauer
 *  Portions written by Marc Hellwig
 *
 *  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 <KernelKit.h>
#include <MediaKit.h>

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

#define DEBUG 0
#include "debug.h"


// Global variables
static int audio_irq_done_sem = -1;     // Signal from interrupt to streaming thread: data block read
static BSoundPlayer *the_player;

// Prototypes
static void playbuffer_func(void *arg, void *buf, size_t size, const media_raw_audio_format &format);


/*
 *  Audio manager thread (for calling media kit functions;
 *  this is not safe under R4 when running on the MacOS stack in kernel space)
 */

// Message constants
const uint32 MSG_QUIT_AUDIO_MANAGER = 'quit';
const uint32 MSG_ENTER_STREAM = 'entr';
const uint32 MSG_EXIT_STREAM = 'exit';
const uint32 MSG_GET_VOLUME = 'getv';
const uint32 MSG_SET_VOLUME = 'setv';

static thread_id am_thread = -1;
static sem_id am_done_sem = -1;

static volatile float am_volume;

static status_t audio_manager(void *arg)
{
        for (;;) {

                // Receive message
                thread_id sender;
                uint32 code = receive_data(&sender, NULL, 0);
                D(bug("Audio manager received %08lx\n", code));
                switch (code) {
                        case MSG_QUIT_AUDIO_MANAGER:
                                return 0;

                        case MSG_ENTER_STREAM:
                                the_player->Start();
                                break;

                        case MSG_EXIT_STREAM:
                                the_player->Stop();
                                break;

                        case MSG_GET_VOLUME:
                                am_volume = the_player->Volume();
                                break;

                        case MSG_SET_VOLUME:
                                the_player->SetVolume(am_volume);
                                break;
                }

                // Acknowledge
                release_sem(am_done_sem);
        }
}


/*
 *  Initialization
 */

// Set AudioStatus to reflect current audio stream format
static void set_audio_status_format(void)
{
        AudioStatus.sample_rate = audio_sample_rates[0];
        AudioStatus.sample_size = audio_sample_sizes[0];
        AudioStatus.channels = audio_channel_counts[0];
}

void AudioInit(void)
{
        // Init audio status and feature flags
        audio_sample_rates.push_back(44100 << 16);
        audio_sample_sizes.push_back(16);
        audio_channel_counts.push_back(2);
        set_audio_status_format();
        AudioStatus.mixer = 0;
        AudioStatus.num_sources = 0;
        audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut;

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

        // Init semaphores
        audio_irq_done_sem = create_sem(0, "Audio IRQ Done");
        am_done_sem = create_sem(0, "Audio Manager Done");

        // Start audio manager thread
        am_thread = spawn_thread(audio_manager, "Audio Manager", B_NORMAL_PRIORITY, NULL);
        resume_thread(am_thread);

        // Start stream
        media_raw_audio_format format;
        format.frame_rate = AudioStatus.sample_rate >> 16;
        format.channel_count = AudioStatus.channels;
        format.format = media_raw_audio_format::B_AUDIO_SHORT;
        format.byte_order = B_MEDIA_BIG_ENDIAN;
        audio_frames_per_block = 4096;
        size_t block_size = (AudioStatus.sample_size >> 3) * AudioStatus.channels * audio_frames_per_block;
        D(bug("AudioInit: block size %d\n", block_size));
        format.buffer_size = block_size;
        the_player = new BSoundPlayer(&format, "MacOS Audio", playbuffer_func, NULL, NULL);
        if (the_player->InitCheck() != B_NO_ERROR) {
                printf("FATAL: Cannot initialize BSoundPlayer\n");
                delete the_player;
                the_player = NULL;
                return;
        } else
                the_player->SetHasData(true);

        // Everything OK
        audio_open = true;
}


/*
 *  Deinitialization
 */

void AudioExit(void)
{
        // Stop stream
        if (the_player) {
                the_player->Stop();
                delete the_player;
                the_player = NULL;
        }

        // Stop audio manager
        if (am_thread > 0) {
                status_t l;
                send_data(am_thread, MSG_QUIT_AUDIO_MANAGER, NULL, 0);
                wait_for_thread(am_thread, &l);
        }

        // Delete semaphores
        delete_sem(am_done_sem);
        delete_sem(audio_irq_done_sem);
}


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

void audio_enter_stream()
{
        while (send_data(am_thread, MSG_ENTER_STREAM, NULL, 0) == B_INTERRUPTED) ;
        while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
}


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

void audio_exit_stream()
{
        while (send_data(am_thread, MSG_EXIT_STREAM, NULL, 0) == B_INTERRUPTED) ;
        while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
}


/*
 *  Streaming function
 */

static uint32 apple_stream_info;        // Mac address of SoundComponentData struct describing next buffer

static void playbuffer_func(void *arg, void *buf, size_t size, const media_raw_audio_format &format)
{
        // Check if new buffer is available
        if (acquire_sem_etc(audio_irq_done_sem, 1, B_TIMEOUT, 0) == B_NO_ERROR) {

                // Get size of audio data
                D(bug("stream: new buffer present\n"));
                uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
                if (apple_stream_info) {
                        size_t work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
                        D(bug("stream: size %d, work_size %d\n", size, work_size));
                        if (work_size > size)
                                work_size = size;

                        if (format.format != media_raw_audio_format::B_AUDIO_SHORT) {
                                D(bug("Wrong audio format %04x\n", format.format));
                                return;
                        }

                        // Place data into Media Kit buffer
                        Mac2Host_memcpy(buf, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
                        if (work_size != size)
                                memset((uint8 *)buf + work_size, 0, size - work_size);
                }

        } else
                memset(buf, 0, size);

        // Trigger audio interrupt to get new buffer
        if (AudioStatus.num_sources) {
                D(bug("stream: triggering irq\n"));
                SetInterruptFlag(INTFLAG_AUDIO);
                TriggerInterrupt();
        }
}


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

void AudioInterrupt(void)
{
        D(bug("AudioInterrupt\n"));

        // Get data from apple mixer
        if (AudioStatus.mixer) {
                M68kRegisters r;
                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]));
        } else
                WriteMacInt32(audio_data + adatStreamInfo, 0);

        // Signal stream function
        release_sem(audio_irq_done_sem);
        D(bug("AudioInterrupt done\n"));
}


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

bool audio_set_sample_rate(int index)
{
        return true;
}

bool audio_set_sample_size(int index)
{
        return true;
}

bool audio_set_channels(int index)
{
        return true;
}


/*
 *  Get/set audio info
 */

bool audio_get_main_mute(void)
{
        return false;
}

uint32 audio_get_main_volume(void)
{
        if (audio_open) {
                while (send_data(am_thread, MSG_GET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
                while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
                return int(am_volume * 256.0) * 0x00010001;
        } else
                return 0x01000100;
}

bool audio_get_speaker_mute(void)
{
        return false;
}

uint32 audio_get_speaker_volume(void)
{
        return 0x01000100;
}

void audio_set_main_mute(bool mute)
{
}

void audio_set_main_volume(uint32 vol)
{
        if (audio_open) {
                am_volume = float((vol >> 16) + (vol & 0xffff)) / 512.0;
                while (send_data(am_thread, MSG_SET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
                while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
        }
}

void audio_set_speaker_mute(bool mute)
{
}

void audio_set_speaker_volume(uint32 vol)
{
}
Revision:	1.7
Committed:	2002-01-15T14:58:35Z (22 years, 4 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-12, nigel-build-13, snapshot-15012002
Changes since 1.6:	+2 -2 lines
Log Message:	- documentation updates - 2001 -> 2002 - version 0.9 -> 1.0
#	User	Rev	Content
1	cebix	1.1	/*
2			* audio_beos.cpp - Audio support, BeOS implementation
3			*
4	cebix	1.7	* Basilisk II (C) 1997-2002 Christian Bauer
5			* Portions written by Marc Hellwig
6	cebix	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
24			#include <KernelKit.h>
25			#include <MediaKit.h>
26
27			#include "cpu_emulation.h"
28			#include "main.h"
29			#include "prefs.h"
30			#include "user_strings.h"
31			#include "audio.h"
32			#include "audio_defs.h"
33
34			#define DEBUG 0
35			#include "debug.h"
36
37
38			// Global variables
39			static int audio_irq_done_sem = -1; // Signal from interrupt to streaming thread: data block read
40			static BSoundPlayer *the_player;
41
42			// Prototypes
43			static void playbuffer_func(void arg, void buf, size_t size, const media_raw_audio_format &format);
44
45
46			/*
47			* Audio manager thread (for calling media kit functions;
48			* this is not safe under R4 when running on the MacOS stack in kernel space)
49			*/
50
51			// Message constants
52			const uint32 MSG_QUIT_AUDIO_MANAGER = 'quit';
53			const uint32 MSG_ENTER_STREAM = 'entr';
54			const uint32 MSG_EXIT_STREAM = 'exit';
55			const uint32 MSG_GET_VOLUME = 'getv';
56			const uint32 MSG_SET_VOLUME = 'setv';
57
58			static thread_id am_thread = -1;
59			static sem_id am_done_sem = -1;
60
61			static volatile float am_volume;
62
63			static status_t audio_manager(void *arg)
64			{
65			for (;;) {
66
67			// Receive message
68			thread_id sender;
69			uint32 code = receive_data(&sender, NULL, 0);
70			D(bug("Audio manager received %08lx\n", code));
71			switch (code) {
72			case MSG_QUIT_AUDIO_MANAGER:
73			return 0;
74
75			case MSG_ENTER_STREAM:
76			the_player->Start();
77			break;
78
79			case MSG_EXIT_STREAM:
80			the_player->Stop();
81			break;
82
83			case MSG_GET_VOLUME:
84			am_volume = the_player->Volume();
85			break;
86
87			case MSG_SET_VOLUME:
88			the_player->SetVolume(am_volume);
89			break;
90			}
91
92			// Acknowledge
93			release_sem(am_done_sem);
94			}
95			}
96
97
98			/*
99			* Initialization
100			*/
101
102	cebix	1.6	// Set AudioStatus to reflect current audio stream format
103			static void set_audio_status_format(void)
104	cebix	1.1	{
105			AudioStatus.sample_rate = audio_sample_rates[0];
106			AudioStatus.sample_size = audio_sample_sizes[0];
107			AudioStatus.channels = audio_channel_counts[0];
108	cebix	1.6	}
109
110			void AudioInit(void)
111			{
112			// Init audio status and feature flags
113			audio_sample_rates.push_back(44100 << 16);
114			audio_sample_sizes.push_back(16);
115			audio_channel_counts.push_back(2);
116			set_audio_status_format();
117	cebix	1.1	AudioStatus.mixer = 0;
118			AudioStatus.num_sources = 0;
119			audio_component_flags = cmpWantsRegisterMessage \| kStereoOut \| k16BitOut;
120
121			// Sound disabled in prefs? Then do nothing
122			if (PrefsFindBool("nosound"))
123			return;
124
125			// Init semaphores
126			audio_irq_done_sem = create_sem(0, "Audio IRQ Done");
127			am_done_sem = create_sem(0, "Audio Manager Done");
128
129			// Start audio manager thread
130			am_thread = spawn_thread(audio_manager, "Audio Manager", B_NORMAL_PRIORITY, NULL);
131			resume_thread(am_thread);
132
133			// Start stream
134			media_raw_audio_format format;
135			format.frame_rate = AudioStatus.sample_rate >> 16;
136			format.channel_count = AudioStatus.channels;
137			format.format = media_raw_audio_format::B_AUDIO_SHORT;
138			format.byte_order = B_MEDIA_BIG_ENDIAN;
139			audio_frames_per_block = 4096;
140			size_t block_size = (AudioStatus.sample_size >> 3) * AudioStatus.channels * audio_frames_per_block;
141			D(bug("AudioInit: block size %d\n", block_size));
142			format.buffer_size = block_size;
143			the_player = new BSoundPlayer(&format, "MacOS Audio", playbuffer_func, NULL, NULL);
144			if (the_player->InitCheck() != B_NO_ERROR) {
145			printf("FATAL: Cannot initialize BSoundPlayer\n");
146			delete the_player;
147			the_player = NULL;
148			return;
149			} else
150			the_player->SetHasData(true);
151
152			// Everything OK
153			audio_open = true;
154			}
155
156
157			/*
158			* Deinitialization
159			*/
160
161			void AudioExit(void)
162			{
163			// Stop stream
164			if (the_player) {
165			the_player->Stop();
166			delete the_player;
167			the_player = NULL;
168			}
169
170			// Stop audio manager
171			if (am_thread > 0) {
172			status_t l;
173			send_data(am_thread, MSG_QUIT_AUDIO_MANAGER, NULL, 0);
174			wait_for_thread(am_thread, &l);
175			}
176
177			// Delete semaphores
178			delete_sem(am_done_sem);
179			delete_sem(audio_irq_done_sem);
180			}
181
182
183			/*
184			* First source added, start audio stream
185			*/
186
187			void audio_enter_stream()
188			{
189			while (send_data(am_thread, MSG_ENTER_STREAM, NULL, 0) == B_INTERRUPTED) ;
190			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
191			}
192
193
194			/*
195			* Last source removed, stop audio stream
196			*/
197
198			void audio_exit_stream()
199			{
200			while (send_data(am_thread, MSG_EXIT_STREAM, NULL, 0) == B_INTERRUPTED) ;
201			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
202			}
203
204
205			/*
206			* Streaming function
207			*/
208
209			static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
210
211			static void playbuffer_func(void arg, void buf, size_t size, const media_raw_audio_format &format)
212			{
213			// Check if new buffer is available
214			if (acquire_sem_etc(audio_irq_done_sem, 1, B_TIMEOUT, 0) == B_NO_ERROR) {
215
216			// Get size of audio data
217			D(bug("stream: new buffer present\n"));
218			uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
219			if (apple_stream_info) {
220			size_t work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
221			D(bug("stream: size %d, work_size %d\n", size, work_size));
222			if (work_size > size)
223			work_size = size;
224
225			if (format.format != media_raw_audio_format::B_AUDIO_SHORT) {
226			D(bug("Wrong audio format %04x\n", format.format));
227			return;
228			}
229
230			// Place data into Media Kit buffer
231	cebix	1.3	Mac2Host_memcpy(buf, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
232	cebix	1.1	if (work_size != size)
233			memset((uint8 *)buf + work_size, 0, size - work_size);
234			}
235
236			} else
237			memset(buf, 0, size);
238
239			// Trigger audio interrupt to get new buffer
240			if (AudioStatus.num_sources) {
241			D(bug("stream: triggering irq\n"));
242			SetInterruptFlag(INTFLAG_AUDIO);
243			TriggerInterrupt();
244			}
245			}
246
247
248			/*
249			* MacOS audio interrupt, read next data block
250			*/
251
252			void AudioInterrupt(void)
253			{
254			D(bug("AudioInterrupt\n"));
255
256			// Get data from apple mixer
257			if (AudioStatus.mixer) {
258			M68kRegisters r;
259			r.a[0] = audio_data + adatStreamInfo;
260			r.a[1] = AudioStatus.mixer;
261			Execute68k(audio_data + adatGetSourceData, &r);
262			D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
263			} else
264			WriteMacInt32(audio_data + adatStreamInfo, 0);
265
266			// Signal stream function
267			release_sem(audio_irq_done_sem);
268			D(bug("AudioInterrupt done\n"));
269			}
270
271
272			/*
273			* Set sampling parameters
274			* "index" is an index into the audio_sample_rates[] etc. arrays
275			* It is guaranteed that AudioStatus.num_sources == 0
276			*/
277
278	cebix	1.6	bool audio_set_sample_rate(int index)
279	cebix	1.1	{
280	cebix	1.6	return true;
281	cebix	1.1	}
282
283	cebix	1.6	bool audio_set_sample_size(int index)
284	cebix	1.1	{
285	cebix	1.6	return true;
286	cebix	1.1	}
287
288	cebix	1.6	bool audio_set_channels(int index)
289	cebix	1.1	{
290	cebix	1.6	return true;
291	cebix	1.1	}
292
293
294			/*
295			* Get/set audio info
296			*/
297
298			bool audio_get_main_mute(void)
299			{
300			return false;
301			}
302
303			uint32 audio_get_main_volume(void)
304			{
305			if (audio_open) {
306			while (send_data(am_thread, MSG_GET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
307			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
308			return int(am_volume * 256.0) * 0x00010001;
309			} else
310			return 0x01000100;
311			}
312
313	cebix	1.2	bool audio_get_speaker_mute(void)
314	cebix	1.1	{
315			return false;
316			}
317
318	cebix	1.2	uint32 audio_get_speaker_volume(void)
319	cebix	1.1	{
320			return 0x01000100;
321			}
322
323			void audio_set_main_mute(bool mute)
324			{
325			}
326
327			void audio_set_main_volume(uint32 vol)
328			{
329			if (audio_open) {
330			am_volume = float((vol >> 16) + (vol & 0xffff)) / 512.0;
331			while (send_data(am_thread, MSG_SET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
332			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
333			}
334			}
335
336	cebix	1.2	void audio_set_speaker_mute(bool mute)
337	cebix	1.1	{
338			}
339
340	cebix	1.2	void audio_set_speaker_volume(uint32 vol)
341	cebix	1.1	{
342			}