aboutsummaryrefslogtreecommitdiffstats
path: root/src/audioOutputs/audioOutput_osx.c
blob: 47f3621dc3e4e690863b9cadb124e388f36ae002 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
/* the Music Player Daemon (MPD)
 * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
 * This project's homepage is: http://www.musicpd.org
 *
 * 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 "../audioOutput.h"

#ifdef HAVE_OSX

#include <AudioUnit/AudioUnit.h>
#include <stdlib.h>
#include <pthread.h>

#include "../log.h"

#define BUFFER_SIZE 8192

typedef struct _OsxData {
	AudioUnit au;
	pthread_mutex_t	mutex;
	pthread_cond_t condition;
	char buffer[BUFFER_SIZE];
	int pos;
	int len;
	int go;
	int started;
} OsxData;

static OsxData * newOsxData() {
	OsxData * ret = malloc(sizeof(OsxData));

	pthread_mutex_init(&ret->mutex, NULL);
	pthread_cond_init(&ret->condition, NULL);

	ret->pos = 0;
	ret->len = 0;
	ret->go = 0;
	ret->started = 0;

	return ret;
}

static int osx_testDefault() {
	/*AudioUnit au;
	ComponentDescription desc;
	Component comp;

	desc.componentType = kAudioUnitType_Output;
	desc.componentSubType = kAudioUnitSubType_Output;
	desc.componentManufacturer = kAudioUnitManufacturer_Apple;
	desc.componentFlags = 0;
	desc.componentFlagsMask = 0;

	comp = FindNextComponent(NULL, &desc);
	if(!comp) {
		ERROR("Unable to open default OS X defice\n");
		return -1;
	}

	if(OpenAComponent(comp, &au) != noErr) {
		ERROR("Unable to open default OS X defice\n");
		return -1;
	}
	
	CloseComponent(au);*/

	return 0;
}

static int osx_initDriver(AudioOutput * audioOutput, ConfigParam * param) {
	OsxData * od  = newOsxData();

	audioOutput->data = od;

	return 0;
}

static void freeOsxData(OsxData * od) {
	free(od);
}

static void osx_finishDriver(AudioOutput * audioOutput) {
	OsxData * od = (OsxData *)audioOutput->data;
	freeOsxData(od);
}

static void osx_dropBufferedAudio(AudioOutput * audioOutput) {
	/* not implemented yet */
}

static void osx_closeDevice(AudioOutput * audioOutput) {
	OsxData * od = (OsxData *) audioOutput->data;

	pthread_mutex_lock(&od->mutex);
	while(od->len) {
		pthread_cond_wait(&od->condition, &od->mutex);
	}
	od->go = 0;
	pthread_mutex_unlock(&od->mutex);

	AudioOutputUnitStop(od->au);

	CloseComponent(od->au);
	AudioUnitUninitialize(od->au);

	audioOutput->open = 0;
}

static OSStatus osx_render(void * vdata, 
		AudioUnitRenderActionFlags *ioActionFlags, 
		const AudioTimeStamp * inTimeStamp,
		UInt32 inBusNumber, UInt32 inNumberFrames,
		AudioBufferList *bufferList)
{
	OsxData * od = (OsxData *)vdata;
	AudioBuffer * buffer = &bufferList->mBuffers[0];
	int bufferSize = buffer->mDataByteSize;
	int bytesToCopy;
	int curpos = 0;

	pthread_mutex_lock(&od->mutex);

	while((od->go || od->len) && bufferSize) {
		while(od->go && od->len < bufferSize && 
				od->len < BUFFER_SIZE)
		{
			pthread_cond_signal(&od->condition);
			pthread_cond_wait(&od->condition, &od->mutex);
		}

		bytesToCopy = od->len < bufferSize ? od->len : bufferSize;
		bufferSize -= bytesToCopy;
		od->len -= bytesToCopy;

		if(od->pos+bytesToCopy > BUFFER_SIZE) {
			int bytes = BUFFER_SIZE-od->pos;
			memcpy(buffer->mData+curpos, od->buffer+od->pos, bytes);
			od->pos = 0;
			curpos += bytes;
			bytesToCopy -= bytes;
		}

		assert(bytesToCopy);
		memcpy(buffer->mData+curpos, od->buffer+od->pos, bytesToCopy);
		od->pos += bytesToCopy;
		curpos += bytesToCopy;

		if(od->pos >= BUFFER_SIZE) od->pos = 0;
	}

	if(bufferSize) {
		memset(buffer->mData+curpos, 0, bufferSize);
	}

	pthread_cond_signal(&od->condition);
	pthread_mutex_unlock(&od->mutex);

	return 0;
}

static int osx_openDevice(AudioOutput * audioOutput) {
	OsxData * od = (OsxData *)audioOutput->data;
	ComponentDescription desc;
	Component comp;
	AURenderCallbackStruct callback;
	AudioFormat * audioFormat = &audioOutput->outAudioFormat;
	AudioStreamBasicDescription streamDesc;

	desc.componentType = kAudioUnitType_Output;
	desc.componentSubType = kAudioUnitSubType_DefaultOutput;
	desc.componentManufacturer = kAudioUnitManufacturer_Apple;
	desc.componentFlags = 0;
	desc.componentFlagsMask = 0;

	DEBUG("finding component\n");

	comp = FindNextComponent(NULL, &desc);
	if(comp == 0) {
		ERROR("Error finding OS X component\n");
		return -1;
	}

	DEBUG("opening component\n");
	if(OpenAComponent(comp, &od->au) != noErr) {
		ERROR("Unable to open OS X component\n");
		return -1;
	}

	DEBUG("initializing au\n");
	if(AudioUnitInitialize(od->au) != 0) {
		CloseComponent(od->au);
		ERROR("Unable to initialuze OS X audio unit\n");
		return -1;
	}

	callback.inputProc = osx_render;
	callback.inputProcRefCon = od;

	DEBUG("set callback\n");
	if(AudioUnitSetProperty(od->au, kAudioUnitProperty_SetRenderCallback,
				kAudioUnitScope_Input, 0,
				&callback, sizeof(callback)) != 0)
	{
		AudioUnitUninitialize(od->au);
		CloseComponent(od->au);
		ERROR("unable to set callbak for OS X audio unit\n");
		return -1;
	}

	streamDesc.mSampleRate = audioFormat->sampleRate;
	streamDesc.mFormatID = kAudioFormatLinearPCM;
	streamDesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger |
			    kLinearPCMFormatFlagIsBigEndian;
	streamDesc.mBytesPerPacket = audioFormat->channels*audioFormat->bits/8;
	streamDesc.mFramesPerPacket = 1;
	streamDesc.mBytesPerFrame = streamDesc.mBytesPerPacket;
	streamDesc.mChannelsPerFrame = audioFormat->channels;
	streamDesc.mBitsPerChannel = audioFormat->bits;

	DEBUG("set format\n");
	if(AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat,
				kAudioUnitScope_Input, 0,
				&streamDesc, sizeof(streamDesc)) != 0)
	{
		AudioUnitUninitialize(od->au);
		CloseComponent(od->au);
		ERROR("Unable to set format on OS X device\n");
		return -1;
	}

	DEBUG("start\n");
	int err = AudioOutputUnitStart(od->au);
	if(err) {
		ERROR("unable to start audio output: %i\n", err);
		return -1;
	}

	od->go = 1;
	od->pos = 0;
	od->len = 0;

	audioOutput->open = 1;

	DEBUG("opened OS X device\n");
	return 0;
}

static int osx_play(AudioOutput * audioOutput, char * playChunk, int size) {
	OsxData * od = (OsxData *)audioOutput->data;
	int bytesToCopy;
	int curpos;

	pthread_mutex_lock(&od->mutex);

	curpos = od->pos+od->len;
	if(curpos >= BUFFER_SIZE) curpos -= BUFFER_SIZE;

	while(size) {
		while(od->len >= BUFFER_SIZE) {
			if(curpos!=od->pos) {
				DEBUG("%i != %i\n", curpos, od->pos);
				abort();
			}
			pthread_cond_signal(&od->condition);
			pthread_cond_wait(&od->condition, &od->mutex);
		}

		bytesToCopy = BUFFER_SIZE - od->len;
		bytesToCopy = bytesToCopy < size ? bytesToCopy : size;
		size -= bytesToCopy;
		od->len += bytesToCopy;

		if(curpos+bytesToCopy > BUFFER_SIZE) {
			int bytes = BUFFER_SIZE-curpos;
			memcpy(od->buffer+curpos, playChunk, bytes);
			curpos = 0;
			playChunk += bytes;
			bytesToCopy -= bytes;
		}

		assert(bytesToCopy);
		memcpy(od->buffer+curpos, playChunk, bytesToCopy);
		curpos += bytesToCopy;
		playChunk += bytesToCopy;

		if(curpos >= BUFFER_SIZE) curpos = 0;
	}

	pthread_cond_signal(&od->condition);
	pthread_mutex_unlock(&od->mutex);

	return 0;
}

AudioOutputPlugin osxPlugin = 
{
	"osx",
	osx_testDefault,
	osx_initDriver,
	osx_finishDriver,
	osx_openDevice,
	osx_play,
	osx_dropBufferedAudio,
	osx_closeDevice,
	NULL /* sendMetadataFunc */
};

#else

#include <stdio.h>

AudioOutputPlugin osxPlugin = 
{
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL
};

#endif