Unix/Solaris/audio_solaris.cpp

/*
 *  audio_solaris.cpp - Audio support, Solaris implementation
 *
 *  Adapted from Frodo's Solaris sound routines by Marc Chabanas
 *
 *  Basilisk II (C) 1997-2002 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 <sys/audioio.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"

#define DEBUG 0
#include "debug.h"


// Global variables
static int fd = -1;                                                     // fd of /dev/audio
static sem_t audio_irq_done_sem;                        // Signal from interrupt to streaming thread: data block read
static pthread_t stream_thread;                         // Audio streaming thread
static pthread_attr_t stream_thread_attr;       // Streaming thread attributes
static bool stream_thread_active = false;
static int sound_buffer_size;                           // Size of sound buffer in bytes

// Prototypes
static void *stream_func(void *arg);


/*
 *  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)
{
        char str[256];

        // 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 semaphore
        if (sem_init(&audio_irq_done_sem, 0, 0) < 0)
                return;

        // Open /dev/audio
        fd = open("/dev/audio", O_WRONLY | O_NDELAY);
        if (fd < 0) {
                sprintf(str, GetString(STR_NO_AUDIO_DEV_WARN), "/dev/audio", strerror(errno));
                WarningAlert(str);
                sem_destroy(&audio_irq_done_sem);
                return;
        }

        // Set audio parameters
        struct audio_info info;
        AUDIO_INITINFO(&info);
        info.play.sample_rate = AudioStatus.sample_rate >> 16;
        info.play.channels = AudioStatus.channels;
        info.play.precision = AudioStatus.sample_size;
        info.play.encoding = AUDIO_ENCODING_LINEAR;
        info.play.port = AUDIO_SPEAKER;
        if (ioctl(fd, AUDIO_SETINFO, &info)) {
                WarningAlert(GetString(STR_AUDIO_FORMAT_WARN));
                close(fd);
                fd = -1;
                sem_destroy(&audio_irq_done_sem);
                return;
        }

        // 2048 frames per buffer
        audio_frames_per_block = 2048;
        sound_buffer_size = (AudioStatus.sample_size>>3) * AudioStatus.channels * audio_frames_per_block;

        // Start audio thread
        pthread_attr_init(&stream_thread_attr);
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
        pthread_attr_setinheritsched(&stream_thread_attr, PTHREAD_EXPLICIT_SCHED);
        pthread_attr_setschedpolicy(&stream_thread_attr, SCHED_FIFO);
        struct sched_param fifo_param;
        fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2;
        pthread_attr_setschedparam(&stream_thread_attr, &fifo_param);
#endif
        stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0);

        // Everything OK
        audio_open = true;
}


/*
 *  Deinitialization
 */

void AudioExit(void)
{
        // Stop audio thread
        if (stream_thread_active) {
                pthread_cancel(stream_thread);
                pthread_join(stream_thread, NULL);
                sem_destroy(&audio_irq_done_sem);
                stream_thread_active = false;
        }

        // Close /dev/audio
        if (fd > 0) {
                ioctl(fd, AUDIO_DRAIN);
                close(fd);
        }
}


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

void audio_enter_stream()
{
}


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

void audio_exit_stream()
{
}


/*
 *  Streaming function
 */

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

static void *stream_func(void *arg)
{
        int16 *silent_buffer = new int16[sound_buffer_size / 2];
        int16 *last_buffer = new int16[sound_buffer_size / 2];
        memset(silent_buffer, 0, sound_buffer_size);

        uint_t sent = 0, delta;
        struct audio_info status;

        for (;;) {
                if (AudioStatus.num_sources) {

                        // Trigger audio interrupt to get new buffer
                        D(bug("stream: triggering irq\n"));
                        SetInterruptFlag(INTFLAG_AUDIO);
                        TriggerInterrupt();
                        D(bug("stream: waiting for ack\n"));
                        sem_wait(&audio_irq_done_sem);
                        D(bug("stream: ack received\n"));

                        // Get size of audio data
                        uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
                        if (apple_stream_info) {
                                int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
                                D(bug("stream: work_size %d\n", work_size));
                                if (work_size > sound_buffer_size)
                                        work_size = sound_buffer_size;
                                if (work_size == 0)
                                        goto silence;

                                // Send data to audio port
                                if (work_size == sound_buffer_size)
                                        write(fd, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), sound_buffer_size);
                                else {
                                        // Last buffer
                                        Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
                                        memset((uint8 *)last_buffer + work_size, 0, sound_buffer_size - work_size);
                                        write(fd, last_buffer, sound_buffer_size);
                                }
                                D(bug("stream: data written\n"));
                        } else
                                goto silence;

                } else {

                        // Audio not active, play silence
silence:        write(fd, silent_buffer, sound_buffer_size);
                }

                // We allow a maximum of three buffers to be sent
                sent += audio_frames_per_block;
                ioctl(fd, AUDIO_GETINFO, &status);
                while ((delta = sent - status.play.samples) > (audio_frames_per_block * 3)) {
                        unsigned int sl = 1000000 * (delta - audio_frames_per_block * 3) / (AudioStatus.sample_rate >> 16);
                        usleep(sl);
                        ioctl(fd, AUDIO_GETINFO, &status);
                }
        }
        return NULL;
}


/*
 *  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
        sem_post(&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 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 false;
}

uint32 audio_get_main_volume(void)
{
        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)
{
}

void audio_set_speaker_mute(bool mute)
{
}

void audio_set_speaker_volume(uint32 vol)
{
}
Revision:	1.8
Committed:	2002-01-15T14:58:40Z (22 years, 10 months ago) by cebix
Branch:	MAIN
CVS Tags:	snapshot-15012002
Changes since 1.7:	+1 -1 lines
Log Message:	- documentation updates - 2001 -> 2002 - version 0.9 -> 1.0
#	User	Rev	Content
1	cebix	1.1	/*
2			* audio_solaris.cpp - Audio support, Solaris implementation
3			*
4			* Adapted from Frodo's Solaris sound routines by Marc Chabanas
5			*
6	cebix	1.8	* Basilisk II (C) 1997-2002 Christian Bauer
7	cebix	1.1	*
8			* This program is free software; you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation; either version 2 of the License, or
11			* (at your option) any later version.
12			*
13			* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17			*
18			* You should have received a copy of the GNU General Public License
19			* along with this program; if not, write to the Free Software
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21			*/
22
23			#include "sysdeps.h"
24
25			#include <sys/ioctl.h>
26			#include <sys/audioio.h>
27			#include <unistd.h>
28			#include <errno.h>
29			#include <pthread.h>
30			#include <semaphore.h>
31
32			#include "cpu_emulation.h"
33			#include "main.h"
34			#include "prefs.h"
35			#include "user_strings.h"
36			#include "audio.h"
37			#include "audio_defs.h"
38
39			#define DEBUG 0
40			#include "debug.h"
41
42
43			// Global variables
44			static int fd = -1; // fd of /dev/audio
45			static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read
46			static pthread_t stream_thread; // Audio streaming thread
47			static pthread_attr_t stream_thread_attr; // Streaming thread attributes
48			static bool stream_thread_active = false;
49			static int sound_buffer_size; // Size of sound buffer in bytes
50
51			// Prototypes
52			static void stream_func(void arg);
53
54
55			/*
56			* Initialization
57			*/
58
59	cebix	1.6	// Set AudioStatus to reflect current audio stream format
60			static void set_audio_status_format(void)
61			{
62			AudioStatus.sample_rate = audio_sample_rates[0];
63			AudioStatus.sample_size = audio_sample_sizes[0];
64			AudioStatus.channels = audio_channel_counts[0];
65			}
66
67	cebix	1.1	void AudioInit(void)
68			{
69			char str[256];
70
71			// Init audio status and feature flags
72	cebix	1.6	audio_sample_rates.push_back(44100 << 16);
73			audio_sample_sizes.push_back(16);
74			audio_channel_counts.push_back(2);
75			set_audio_status_format();
76	cebix	1.1	AudioStatus.mixer = 0;
77			AudioStatus.num_sources = 0;
78			audio_component_flags = cmpWantsRegisterMessage \| kStereoOut \| k16BitOut;
79
80			// Sound disabled in prefs? Then do nothing
81			if (PrefsFindBool("nosound"))
82			return;
83
84			// Init semaphore
85			if (sem_init(&audio_irq_done_sem, 0, 0) < 0)
86			return;
87
88			// Open /dev/audio
89			fd = open("/dev/audio", O_WRONLY \| O_NDELAY);
90			if (fd < 0) {
91			sprintf(str, GetString(STR_NO_AUDIO_DEV_WARN), "/dev/audio", strerror(errno));
92			WarningAlert(str);
93			sem_destroy(&audio_irq_done_sem);
94			return;
95			}
96
97			// Set audio parameters
98			struct audio_info info;
99			AUDIO_INITINFO(&info);
100			info.play.sample_rate = AudioStatus.sample_rate >> 16;
101			info.play.channels = AudioStatus.channels;
102			info.play.precision = AudioStatus.sample_size;
103			info.play.encoding = AUDIO_ENCODING_LINEAR;
104			info.play.port = AUDIO_SPEAKER;
105			if (ioctl(fd, AUDIO_SETINFO, &info)) {
106			WarningAlert(GetString(STR_AUDIO_FORMAT_WARN));
107			close(fd);
108			fd = -1;
109			sem_destroy(&audio_irq_done_sem);
110			return;
111			}
112
113			// 2048 frames per buffer
114			audio_frames_per_block = 2048;
115			sound_buffer_size = (AudioStatus.sample_size>>3) * AudioStatus.channels * audio_frames_per_block;
116
117			// Start audio thread
118			pthread_attr_init(&stream_thread_attr);
119			#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
120			pthread_attr_setinheritsched(&stream_thread_attr, PTHREAD_EXPLICIT_SCHED);
121			pthread_attr_setschedpolicy(&stream_thread_attr, SCHED_FIFO);
122			struct sched_param fifo_param;
123			fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2;
124			pthread_attr_setschedparam(&stream_thread_attr, &fifo_param);
125			#endif
126			stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0);
127
128			// Everything OK
129			audio_open = true;
130			}
131
132
133			/*
134			* Deinitialization
135			*/
136
137			void AudioExit(void)
138			{
139			// Stop audio thread
140			if (stream_thread_active) {
141			pthread_cancel(stream_thread);
142			pthread_join(stream_thread, NULL);
143			sem_destroy(&audio_irq_done_sem);
144			stream_thread_active = false;
145			}
146
147			// Close /dev/audio
148			if (fd > 0) {
149			ioctl(fd, AUDIO_DRAIN);
150			close(fd);
151			}
152			}
153
154
155			/*
156			* First source added, start audio stream
157			*/
158
159			void audio_enter_stream()
160			{
161			}
162
163
164			/*
165			* Last source removed, stop audio stream
166			*/
167
168			void audio_exit_stream()
169			{
170			}
171
172
173			/*
174			* Streaming function
175			*/
176
177			static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
178
179			static void stream_func(void arg)
180			{
181			int16 *silent_buffer = new int16[sound_buffer_size / 2];
182			int16 *last_buffer = new int16[sound_buffer_size / 2];
183			memset(silent_buffer, 0, sound_buffer_size);
184
185			uint_t sent = 0, delta;
186			struct audio_info status;
187
188			for (;;) {
189			if (AudioStatus.num_sources) {
190
191			// Trigger audio interrupt to get new buffer
192			D(bug("stream: triggering irq\n"));
193			SetInterruptFlag(INTFLAG_AUDIO);
194			TriggerInterrupt();
195			D(bug("stream: waiting for ack\n"));
196			sem_wait(&audio_irq_done_sem);
197			D(bug("stream: ack received\n"));
198
199			// Get size of audio data
200			uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
201			if (apple_stream_info) {
202			int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
203			D(bug("stream: work_size %d\n", work_size));
204			if (work_size > sound_buffer_size)
205			work_size = sound_buffer_size;
206			if (work_size == 0)
207			goto silence;
208
209			// Send data to audio port
210			if (work_size == sound_buffer_size)
211			write(fd, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), sound_buffer_size);
212			else {
213			// Last buffer
214	cebix	1.3	Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
215	cebix	1.1	memset((uint8 *)last_buffer + work_size, 0, sound_buffer_size - work_size);
216			write(fd, last_buffer, sound_buffer_size);
217			}
218			D(bug("stream: data written\n"));
219			} else
220			goto silence;
221
222			} else {
223
224			// Audio not active, play silence
225			silence: write(fd, silent_buffer, sound_buffer_size);
226			}
227
228			// We allow a maximum of three buffers to be sent
229			sent += audio_frames_per_block;
230			ioctl(fd, AUDIO_GETINFO, &status);
231			while ((delta = sent - status.play.samples) > (audio_frames_per_block * 3)) {
232			unsigned int sl = 1000000 * (delta - audio_frames_per_block * 3) / (AudioStatus.sample_rate >> 16);
233			usleep(sl);
234			ioctl(fd, AUDIO_GETINFO, &status);
235			}
236			}
237			return NULL;
238			}
239
240
241			/*
242			* MacOS audio interrupt, read next data block
243			*/
244
245			void AudioInterrupt(void)
246			{
247			D(bug("AudioInterrupt\n"));
248
249			// Get data from apple mixer
250			if (AudioStatus.mixer) {
251			M68kRegisters r;
252			r.a[0] = audio_data + adatStreamInfo;
253			r.a[1] = AudioStatus.mixer;
254			Execute68k(audio_data + adatGetSourceData, &r);
255			D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
256			} else
257			WriteMacInt32(audio_data + adatStreamInfo, 0);
258
259			// Signal stream function
260			sem_post(&audio_irq_done_sem);
261			D(bug("AudioInterrupt done\n"));
262			}
263
264
265			/*
266			* Set sampling parameters
267			* "index" is an index into the audio_sample_rates[] etc. arrays
268			* It is guaranteed that AudioStatus.num_sources == 0
269			*/
270
271	cebix	1.7	bool audio_set_sample_rate(int index)
272	cebix	1.1	{
273	cebix	1.7	return true;
274	cebix	1.1	}
275
276	cebix	1.7	bool audio_set_sample_size(int index)
277	cebix	1.1	{
278	cebix	1.7	return true;
279	cebix	1.1	}
280
281	cebix	1.7	bool audio_set_channels(int index)
282	cebix	1.1	{
283	cebix	1.7	return true;
284	cebix	1.1	}
285
286
287			/*
288			* Get/set volume controls (volume values received/returned have the left channel
289			* volume in the upper 16 bits and the right channel volume in the lower 16 bits;
290			* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume"))
291			*/
292
293			bool audio_get_main_mute(void)
294			{
295			return false;
296			}
297
298			uint32 audio_get_main_volume(void)
299			{
300			return 0x01000100;
301			}
302
303	cebix	1.2	bool audio_get_speaker_mute(void)
304	cebix	1.1	{
305			return false;
306			}
307
308	cebix	1.2	uint32 audio_get_speaker_volume(void)
309	cebix	1.1	{
310			return 0x01000100;
311			}
312
313			void audio_set_main_mute(bool mute)
314			{
315			}
316
317			void audio_set_main_volume(uint32 vol)
318			{
319			}
320
321	cebix	1.2	void audio_set_speaker_mute(bool mute)
322	cebix	1.1	{
323			}
324
325	cebix	1.2	void audio_set_speaker_volume(uint32 vol)
326	cebix	1.1	{
327			}