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) 1997-1999 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"


// 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 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
 */

void AudioInit(void)
{
        char str[256];

        // 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 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
                                        memcpy(last_buffer, Mac2HostAddr(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
 */

void audio_set_sample_rate(int index)
{
}

void audio_set_sample_size(int index)
{
}

void audio_set_channels(int index)
{
}


/*
 *  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_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)
{
}

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_solaris.cpp - Audio support, Solaris implementation
3			*
4			* Adapted from Frodo's Solaris sound routines by Marc Chabanas
5			*
6			* Basilisk II (C) 1997-1999 Christian Bauer
7			*
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			// Supported sample rates, sizes and channels
44			int audio_num_sample_rates = 1;
45			uint32 audio_sample_rates[] = {44100 << 16};
46			int audio_num_sample_sizes = 1;
47			uint16 audio_sample_sizes[] = {16};
48			int audio_num_channel_counts = 1;
49			uint16 audio_channel_counts[] = {2};
50
51			// Global variables
52			static int fd = -1; // fd of /dev/audio
53			static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read
54			static pthread_t stream_thread; // Audio streaming thread
55			static pthread_attr_t stream_thread_attr; // Streaming thread attributes
56			static bool stream_thread_active = false;
57			static int sound_buffer_size; // Size of sound buffer in bytes
58
59			// Prototypes
60			static void stream_func(void arg);
61
62
63			/*
64			* Initialization
65			*/
66
67			void AudioInit(void)
68			{
69			char str[256];
70
71			// Init audio status and feature flags
72			AudioStatus.sample_rate = audio_sample_rates[0];
73			AudioStatus.sample_size = audio_sample_sizes[0];
74			AudioStatus.channels = audio_channel_counts[0];
75			AudioStatus.mixer = 0;
76			AudioStatus.num_sources = 0;
77			audio_component_flags = cmpWantsRegisterMessage \| kStereoOut \| k16BitOut;
78
79			// Sound disabled in prefs? Then do nothing
80			if (PrefsFindBool("nosound"))
81			return;
82
83			// Init semaphore
84			if (sem_init(&audio_irq_done_sem, 0, 0) < 0)
85			return;
86
87			// Open /dev/audio
88			fd = open("/dev/audio", O_WRONLY \| O_NDELAY);
89			if (fd < 0) {
90			sprintf(str, GetString(STR_NO_AUDIO_DEV_WARN), "/dev/audio", strerror(errno));
91			WarningAlert(str);
92			sem_destroy(&audio_irq_done_sem);
93			return;
94			}
95
96			// Set audio parameters
97			struct audio_info info;
98			AUDIO_INITINFO(&info);
99			info.play.sample_rate = AudioStatus.sample_rate >> 16;
100			info.play.channels = AudioStatus.channels;
101			info.play.precision = AudioStatus.sample_size;
102			info.play.encoding = AUDIO_ENCODING_LINEAR;
103			info.play.port = AUDIO_SPEAKER;
104			if (ioctl(fd, AUDIO_SETINFO, &info)) {
105			WarningAlert(GetString(STR_AUDIO_FORMAT_WARN));
106			close(fd);
107			fd = -1;
108			sem_destroy(&audio_irq_done_sem);
109			return;
110			}
111
112			// 2048 frames per buffer
113			audio_frames_per_block = 2048;
114			sound_buffer_size = (AudioStatus.sample_size>>3) * AudioStatus.channels * audio_frames_per_block;
115
116			// Start audio thread
117			pthread_attr_init(&stream_thread_attr);
118			#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
119			pthread_attr_setinheritsched(&stream_thread_attr, PTHREAD_EXPLICIT_SCHED);
120			pthread_attr_setschedpolicy(&stream_thread_attr, SCHED_FIFO);
121			struct sched_param fifo_param;
122			fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2;
123			pthread_attr_setschedparam(&stream_thread_attr, &fifo_param);
124			#endif
125			stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0);
126
127			// Everything OK
128			audio_open = true;
129			}
130
131
132			/*
133			* Deinitialization
134			*/
135
136			void AudioExit(void)
137			{
138			// Stop audio thread
139			if (stream_thread_active) {
140			pthread_cancel(stream_thread);
141			pthread_join(stream_thread, NULL);
142			sem_destroy(&audio_irq_done_sem);
143			stream_thread_active = false;
144			}
145
146			// Close /dev/audio
147			if (fd > 0) {
148			ioctl(fd, AUDIO_DRAIN);
149			close(fd);
150			}
151			}
152
153
154			/*
155			* First source added, start audio stream
156			*/
157
158			void audio_enter_stream()
159			{
160			}
161
162
163			/*
164			* Last source removed, stop audio stream
165			*/
166
167			void audio_exit_stream()
168			{
169			}
170
171
172			/*
173			* Streaming function
174			*/
175
176			static uint32 apple_stream_info; // Mac address of SoundComponentData struct describing next buffer
177
178			static void stream_func(void arg)
179			{
180			int16 *silent_buffer = new int16[sound_buffer_size / 2];
181			int16 *last_buffer = new int16[sound_buffer_size / 2];
182			memset(silent_buffer, 0, sound_buffer_size);
183
184			uint_t sent = 0, delta;
185			struct audio_info status;
186
187			for (;;) {
188			if (AudioStatus.num_sources) {
189
190			// Trigger audio interrupt to get new buffer
191			D(bug("stream: triggering irq\n"));
192			SetInterruptFlag(INTFLAG_AUDIO);
193			TriggerInterrupt();
194			D(bug("stream: waiting for ack\n"));
195			sem_wait(&audio_irq_done_sem);
196			D(bug("stream: ack received\n"));
197
198			// Get size of audio data
199			uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo);
200			if (apple_stream_info) {
201			int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels;
202			D(bug("stream: work_size %d\n", work_size));
203			if (work_size > sound_buffer_size)
204			work_size = sound_buffer_size;
205			if (work_size == 0)
206			goto silence;
207
208			// Send data to audio port
209			if (work_size == sound_buffer_size)
210			write(fd, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), sound_buffer_size);
211			else {
212			// Last buffer
213			memcpy(last_buffer, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), work_size);
214			memset((uint8 *)last_buffer + work_size, 0, sound_buffer_size - work_size);
215			write(fd, last_buffer, sound_buffer_size);
216			}
217			D(bug("stream: data written\n"));
218			} else
219			goto silence;
220
221			} else {
222
223			// Audio not active, play silence
224			silence: write(fd, silent_buffer, sound_buffer_size);
225			}
226
227			// We allow a maximum of three buffers to be sent
228			sent += audio_frames_per_block;
229			ioctl(fd, AUDIO_GETINFO, &status);
230			while ((delta = sent - status.play.samples) > (audio_frames_per_block * 3)) {
231			unsigned int sl = 1000000 * (delta - audio_frames_per_block * 3) / (AudioStatus.sample_rate >> 16);
232			usleep(sl);
233			ioctl(fd, AUDIO_GETINFO, &status);
234			}
235			}
236			return NULL;
237			}
238
239
240			/*
241			* MacOS audio interrupt, read next data block
242			*/
243
244			void AudioInterrupt(void)
245			{
246			D(bug("AudioInterrupt\n"));
247
248			// Get data from apple mixer
249			if (AudioStatus.mixer) {
250			M68kRegisters r;
251			r.a[0] = audio_data + adatStreamInfo;
252			r.a[1] = AudioStatus.mixer;
253			Execute68k(audio_data + adatGetSourceData, &r);
254			D(bug(" GetSourceData() returns %08lx\n", r.d[0]));
255			} else
256			WriteMacInt32(audio_data + adatStreamInfo, 0);
257
258			// Signal stream function
259			sem_post(&audio_irq_done_sem);
260			D(bug("AudioInterrupt done\n"));
261			}
262
263
264			/*
265			* Set sampling parameters
266			* "index" is an index into the audio_sample_rates[] etc. arrays
267			* It is guaranteed that AudioStatus.num_sources == 0
268			*/
269
270			void audio_set_sample_rate(int index)
271			{
272			}
273
274			void audio_set_sample_size(int index)
275			{
276			}
277
278			void audio_set_channels(int index)
279			{
280			}
281
282
283			/*
284			* Get/set volume controls (volume values received/returned have the left channel
285			* volume in the upper 16 bits and the right channel volume in the lower 16 bits;
286			* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume"))
287			*/
288
289			bool audio_get_main_mute(void)
290			{
291			return false;
292			}
293
294			uint32 audio_get_main_volume(void)
295			{
296			return 0x01000100;
297			}
298
299			bool audio_get_dac_mute(void)
300			{
301			return false;
302			}
303
304			uint32 audio_get_dac_volume(void)
305			{
306			return 0x01000100;
307			}
308
309			void audio_set_main_mute(bool mute)
310			{
311			}
312
313			void audio_set_main_volume(uint32 vol)
314			{
315			}
316
317			void audio_set_dac_mute(bool mute)
318			{
319			}
320
321			void audio_set_dac_volume(uint32 vol)
322			{
323			}