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:	1.1.1.1 (vendor branch)
Committed:	1999-10-03T14:16:25Z (25 years, 2 months ago) by cebix
Branch:	cebix
CVS Tags:	release-0_7-2, start
Changes since 1.1:	+0 -0 lines
Log Message:	Imported sources
#	Content
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	}