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, 10 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
#	Content
1	/*
2	* audio_beos.cpp - Audio support, BeOS implementation
3	*
4	* Basilisk II (C) 1997-2002 Christian Bauer
5	* Portions written by 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	// 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	// Set AudioStatus to reflect current audio stream format
103	static void set_audio_status_format(void)
104	{
105	AudioStatus.sample_rate = audio_sample_rates[0];
106	AudioStatus.sample_size = audio_sample_sizes[0];
107	AudioStatus.channels = audio_channel_counts[0];
108	}
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	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	Mac2Host_memcpy(buf, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
232	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	bool audio_set_sample_rate(int index)
279	{
280	return true;
281	}
282
283	bool audio_set_sample_size(int index)
284	{
285	return true;
286	}
287
288	bool audio_set_channels(int index)
289	{
290	return true;
291	}
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	bool audio_get_speaker_mute(void)
314	{
315	return false;
316	}
317
318	uint32 audio_get_speaker_volume(void)
319	{
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	void audio_set_speaker_mute(bool mute)
337	{
338	}
339
340	void audio_set_speaker_volume(uint32 vol)
341	{
342	}