src/BeOS/audio_beos.cpp

/*
 *  audio_beos.cpp - Audio support, BeOS implementation
 *
 *  Basilisk II (C) 1997-1999 Christian Bauer
 *  Portions (C) 1997-1999 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"


// Supported sample rates, sizes and channels
int audio_num_sample_rates = 1;
uint32 audio_sample_rates[] = {44100 << 16};
int audio_num_sample_sizes = 1;
uint16 audio_sample_sizes[] = {16};
int audio_num_channel_counts = 1;
uint16 audio_channel_counts[] = {2};

// 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
 */

void AudioInit(void)
{
        // Init audio status and feature flags
        AudioStatus.sample_rate = audio_sample_rates[0];
        AudioStatus.sample_size = audio_sample_sizes[0];
        AudioStatus.channels = audio_channel_counts[0];
        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
                        memcpy(buf, Mac2HostAddr(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
 */

void audio_set_sample_rate(int index)
{
}

void audio_set_sample_size(int index)
{
}

void audio_set_channels(int index)
{
}


/*
 *  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_dac_mute(void)
{
        return false;
}

uint32 audio_get_dac_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_dac_mute(bool mute)
{
}

void audio_set_dac_volume(uint32 vol)
{
}
Revision:	1.1
Committed:	1999-10-03T14:16:25Z (25 years, 1 month ago) by cebix
Branch:	MAIN
Branch point for:	cebix
Log Message:	Initial revision
#	User	Rev	Content
1	cebix	1.1	/*
2			* audio_beos.cpp - Audio support, BeOS implementation
3			*
4			* Basilisk II (C) 1997-1999 Christian Bauer
5			* Portions (C) 1997-1999 Marc Hellwig
6			*
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			// Supported sample rates, sizes and channels
39			int audio_num_sample_rates = 1;
40			uint32 audio_sample_rates[] = {44100 << 16};
41			int audio_num_sample_sizes = 1;
42			uint16 audio_sample_sizes[] = {16};
43			int audio_num_channel_counts = 1;
44			uint16 audio_channel_counts[] = {2};
45
46			// Global variables
47			static int audio_irq_done_sem = -1; // Signal from interrupt to streaming thread: data block read
48			static BSoundPlayer *the_player;
49
50			// Prototypes
51			static void playbuffer_func(void arg, void buf, size_t size, const media_raw_audio_format &format);
52
53
54			/*
55			* Audio manager thread (for calling media kit functions;
56			* this is not safe under R4 when running on the MacOS stack in kernel space)
57			*/
58
59			// Message constants
60			const uint32 MSG_QUIT_AUDIO_MANAGER = 'quit';
61			const uint32 MSG_ENTER_STREAM = 'entr';
62			const uint32 MSG_EXIT_STREAM = 'exit';
63			const uint32 MSG_GET_VOLUME = 'getv';
64			const uint32 MSG_SET_VOLUME = 'setv';
65
66			static thread_id am_thread = -1;
67			static sem_id am_done_sem = -1;
68
69			static volatile float am_volume;
70
71			static status_t audio_manager(void *arg)
72			{
73			for (;;) {
74
75			// Receive message
76			thread_id sender;
77			uint32 code = receive_data(&sender, NULL, 0);
78			D(bug("Audio manager received %08lx\n", code));
79			switch (code) {
80			case MSG_QUIT_AUDIO_MANAGER:
81			return 0;
82
83			case MSG_ENTER_STREAM:
84			the_player->Start();
85			break;
86
87			case MSG_EXIT_STREAM:
88			the_player->Stop();
89			break;
90
91			case MSG_GET_VOLUME:
92			am_volume = the_player->Volume();
93			break;
94
95			case MSG_SET_VOLUME:
96			the_player->SetVolume(am_volume);
97			break;
98			}
99
100			// Acknowledge
101			release_sem(am_done_sem);
102			}
103			}
104
105
106			/*
107			* Initialization
108			*/
109
110			void AudioInit(void)
111			{
112			// Init audio status and feature flags
113			AudioStatus.sample_rate = audio_sample_rates[0];
114			AudioStatus.sample_size = audio_sample_sizes[0];
115			AudioStatus.channels = audio_channel_counts[0];
116			AudioStatus.mixer = 0;
117			AudioStatus.num_sources = 0;
118			audio_component_flags = cmpWantsRegisterMessage \| kStereoOut \| k16BitOut;
119
120			// Sound disabled in prefs? Then do nothing
121			if (PrefsFindBool("nosound"))
122			return;
123
124			// Init semaphores
125			audio_irq_done_sem = create_sem(0, "Audio IRQ Done");
126			am_done_sem = create_sem(0, "Audio Manager Done");
127
128			// Start audio manager thread
129			am_thread = spawn_thread(audio_manager, "Audio Manager", B_NORMAL_PRIORITY, NULL);
130			resume_thread(am_thread);
131
132			// Start stream
133			media_raw_audio_format format;
134			format.frame_rate = AudioStatus.sample_rate >> 16;
135			format.channel_count = AudioStatus.channels;
136			format.format = media_raw_audio_format::B_AUDIO_SHORT;
137			format.byte_order = B_MEDIA_BIG_ENDIAN;
138			audio_frames_per_block = 4096;
139			size_t block_size = (AudioStatus.sample_size >> 3) * AudioStatus.channels * audio_frames_per_block;
140			D(bug("AudioInit: block size %d\n", block_size));
141			format.buffer_size = block_size;
142			the_player = new BSoundPlayer(&format, "MacOS Audio", playbuffer_func, NULL, NULL);
143			if (the_player->InitCheck() != B_NO_ERROR) {
144			printf("FATAL: Cannot initialize BSoundPlayer\n");
145			delete the_player;
146			the_player = NULL;
147			return;
148			} else
149			the_player->SetHasData(true);
150
151			// Everything OK
152			audio_open = true;
153			}
154
155
156			/*
157			* Deinitialization
158			*/
159
160			void AudioExit(void)
161			{
162			// Stop stream
163			if (the_player) {
164			the_player->Stop();
165			delete the_player;
166			the_player = NULL;
167			}
168
169			// Stop audio manager
170			if (am_thread > 0) {
171			status_t l;
172			send_data(am_thread, MSG_QUIT_AUDIO_MANAGER, NULL, 0);
173			wait_for_thread(am_thread, &l);
174			}
175
176			// Delete semaphores
177			delete_sem(am_done_sem);
178			delete_sem(audio_irq_done_sem);
179			}
180
181
182			/*
183			* First source added, start audio stream
184			*/
185
186			void audio_enter_stream()
187			{
188			while (send_data(am_thread, MSG_ENTER_STREAM, NULL, 0) == B_INTERRUPTED) ;
189			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
190			}
191
192
193			/*
194			* Last source removed, stop audio stream
195			*/
196
197			void audio_exit_stream()
198			{
199			while (send_data(am_thread, MSG_EXIT_STREAM, NULL, 0) == B_INTERRUPTED) ;
200			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
201			}
202
203
204			/*
205			* Streaming function
206			*/
207
208			static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
209
210			static void playbuffer_func(void arg, void buf, size_t size, const media_raw_audio_format &format)
211			{
212			// Check if new buffer is available
213			if (acquire_sem_etc(audio_irq_done_sem, 1, B_TIMEOUT, 0) == B_NO_ERROR) {
214
215			// Get size of audio data
216			D(bug("stream: new buffer present\n"));
217			uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
218			if (apple_stream_info) {
219			size_t work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
220			D(bug("stream: size %d, work_size %d\n", size, work_size));
221			if (work_size > size)
222			work_size = size;
223
224			if (format.format != media_raw_audio_format::B_AUDIO_SHORT) {
225			D(bug("Wrong audio format %04x\n", format.format));
226			return;
227			}
228
229			// Place data into Media Kit buffer
230			memcpy(buf, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), work_size);
231			if (work_size != size)
232			memset((uint8 *)buf + work_size, 0, size - work_size);
233			}
234
235			} else
236			memset(buf, 0, size);
237
238			// Trigger audio interrupt to get new buffer
239			if (AudioStatus.num_sources) {
240			D(bug("stream: triggering irq\n"));
241			SetInterruptFlag(INTFLAG_AUDIO);
242			TriggerInterrupt();
243			}
244			}
245
246
247			/*
248			* MacOS audio interrupt, read next data block
249			*/
250
251			void AudioInterrupt(void)
252			{
253			D(bug("AudioInterrupt\n"));
254
255			// Get data from apple mixer
256			if (AudioStatus.mixer) {
257			M68kRegisters r;
258			r.a[0] = audio_data + adatStreamInfo;
259			r.a[1] = AudioStatus.mixer;
260			Execute68k(audio_data + adatGetSourceData, &r);
261			D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
262			} else
263			WriteMacInt32(audio_data + adatStreamInfo, 0);
264
265			// Signal stream function
266			release_sem(audio_irq_done_sem);
267			D(bug("AudioInterrupt done\n"));
268			}
269
270
271			/*
272			* Set sampling parameters
273			* "index" is an index into the audio_sample_rates[] etc. arrays
274			* It is guaranteed that AudioStatus.num_sources == 0
275			*/
276
277			void audio_set_sample_rate(int index)
278			{
279			}
280
281			void audio_set_sample_size(int index)
282			{
283			}
284
285			void audio_set_channels(int index)
286			{
287			}
288
289
290			/*
291			* Get/set audio info
292			*/
293
294			bool audio_get_main_mute(void)
295			{
296			return false;
297			}
298
299			uint32 audio_get_main_volume(void)
300			{
301			if (audio_open) {
302			while (send_data(am_thread, MSG_GET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
303			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
304			return int(am_volume * 256.0) * 0x00010001;
305			} else
306			return 0x01000100;
307			}
308
309			bool audio_get_dac_mute(void)
310			{
311			return false;
312			}
313
314			uint32 audio_get_dac_volume(void)
315			{
316			return 0x01000100;
317			}
318
319			void audio_set_main_mute(bool mute)
320			{
321			}
322
323			void audio_set_main_volume(uint32 vol)
324			{
325			if (audio_open) {
326			am_volume = float((vol >> 16) + (vol & 0xffff)) / 512.0;
327			while (send_data(am_thread, MSG_SET_VOLUME, NULL, 0) == B_INTERRUPTED) ;
328			while (acquire_sem(am_done_sem) == B_INTERRUPTED) ;
329			}
330			}
331
332			void audio_set_dac_mute(bool mute)
333			{
334			}
335
336			void audio_set_dac_volume(uint32 vol)
337			{
338			}