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
#	Content
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) 1997-2002 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	// 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	// 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	void AudioInit(void)
68	{
69	char str[256];
70
71	// Init audio status and feature flags
72	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	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	Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size);
215	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	bool audio_set_sample_rate(int index)
272	{
273	return true;
274	}
275
276	bool audio_set_sample_size(int index)
277	{
278	return true;
279	}
280
281	bool audio_set_channels(int index)
282	{
283	return true;
284	}
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	bool audio_get_speaker_mute(void)
304	{
305	return false;
306	}
307
308	uint32 audio_get_speaker_volume(void)
309	{
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	void audio_set_speaker_mute(bool mute)
322	{
323	}
324
325	void audio_set_speaker_volume(uint32 vol)
326	{
327	}