e7fecc8262650e8a630b7892b9cabfb627fbc421
[paraslash.git] / osx_writer.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file osx_writer.c paraslash's output plugin for MacOs */
20
21 #include <CoreAudio/CoreAudio.h>
22 #include "para.h"
23 #include "fd.h"
24 #include "string.h"
25 #include "list.h"
26 #include "sched.h"
27 #include "write.h"
28 #include "osx_write.cmdline.h"
29 #include "error.h"
30
31
32 #include <CoreAudio/CoreAudio.h>
33 #include <AudioUnit/AudioUnit.h>
34 #include <AudioToolbox/DefaultAudioOutput.h>
35 #include <semaphore.h>
36 struct osx_buffer {
37 float *buffer;
38 long size;
39 float *ptr; /* Where in the buffer are we? */
40 long remaining;
41 struct osx_buffer *next;
42 };
43 typedef struct osx_buffer osx_buffer;
44
45 struct private_osx_writer_data {
46 long size;
47 short *ptr;
48 AudioUnit output;
49 char play;
50 sem_t *semaphore;
51 osx_buffer *from; /* Current buffers */
52 osx_buffer *to;
53 };
54
55
56 /*
57 * Tried with 3 buffers, but then any little window move is sufficient to
58 * stop the sound (OK, on a G3 400 with a Public Beta. Perhaps now we can
59 * go down to 2 buffers). With 16 buffers we have 1.5 seconds music
60 * buffered (or, if you're pessimistic, 1.5 seconds latency). Note 0
61 * buffers don't work much further than the Bus error.
62 */
63 #define NUMBER_BUFFERS 2
64
65 static void destroy_buffers(struct private_osx_writer_data *powd)
66 {
67 osx_buffer *ptr;
68 osx_buffer *ptr2;
69 ptr = powd->to->next;
70 powd->to->next = NULL;
71 while (ptr) {
72 ptr2 = ptr->next;
73 if (ptr->buffer)
74 free(ptr->buffer);
75 free(ptr);
76 ptr = ptr2;
77 }
78 }
79
80 static void init_buffers(struct private_osx_writer_data *powd)
81 {
82 int i;
83
84 osx_buffer ** ptrptr;
85 ptrptr = &powd->to;
86 for (i = 0; i < NUMBER_BUFFERS; i++) {
87 *ptrptr = malloc(sizeof(osx_buffer));
88 (*ptrptr)->size = 0;
89 (*ptrptr)->remaining = 0;
90 (*ptrptr)->buffer = NULL;
91 ptrptr = &(*ptrptr)->next;
92 /* This buffer is ready for filling (of course, it is empty!) */
93 sem_post(powd->semaphore);
94 }
95 *ptrptr = powd->from = powd->to;
96 }
97
98 static void fill_buffer(osx_buffer *b, short *source, long size)
99 {
100 float *dest;
101
102 PARA_INFO_LOG("%ld\n", size);
103 if (b->remaining) /* Non empty buffer, must still be playing */
104 return;
105 if (b->size != size) {
106 /*
107 * Hey! What's that? Coudn't this buffer size be fixed
108 * once (well, perhaps we just didn't allocate it yet)
109 */
110 if (b->buffer)
111 free(b->buffer);
112 b->buffer = malloc(size * sizeof(float));
113 b->size = size;
114 }
115 dest = b->buffer;
116 while (size--)
117 /* *dest++ = ((*source++) + 32768) / 65536.0; */
118 *dest++ = (*source++) / 32768.0;
119 b->ptr = b->buffer;
120 b->remaining = b->size;
121 }
122
123 static OSStatus osx_callback(void * inClientData,
124 __a_unused AudioUnitRenderActionFlags *inActionFlags,
125 __a_unused const AudioTimeStamp *inTimeStamp,
126 __a_unused UInt32 inBusNumber,
127 __a_unused UInt32 inNumFrames,
128 AudioBufferList *outOutputData)
129 {
130 long m, n;
131 float *dest;
132 int i;
133 struct private_osx_writer_data *powd = inClientData;
134
135 // PARA_INFO_LOG("%p\n", powd);
136 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
137 /* what we have to fill */
138 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
139 dest = outOutputData->mBuffers[i].mData;
140 while (m > 0) {
141 if ((n = powd->from->remaining) <= 0) {
142 /* no more bytes in the current read buffer! */
143 while ((n = powd->from->remaining) <= 0)
144 /* wait for the results */
145 usleep(2000);
146 }
147 /*
148 * we dump what we can. In fact, just the necessary
149 * should be sufficient
150 */
151 if (n > m)
152 n = m;
153 memcpy(dest, powd->from->ptr, n * sizeof(float));
154 dest += n;
155 /* remember all done work */
156 m -= n;
157 powd->from->ptr += n;
158 if ((powd->from->remaining -= n) <= 0) {
159 /* tell that there's a buffer to fill */
160 sem_post(powd->semaphore);
161 powd->from = powd->from->next;
162 }
163 }
164 }
165 return 0;
166 }
167
168 static int osx_writer_open(struct writer_node *wn)
169 {
170 struct private_osx_writer_data *powd = para_calloc(
171 sizeof(struct private_osx_writer_data));
172 ComponentDescription desc;
173 Component comp;
174 AURenderCallbackStruct inputCallback = {osx_callback, powd};
175 AudioStreamBasicDescription format;
176 char s[10];
177 int m, ret;
178
179 wn->private_data = powd;
180 /* where did that default audio output go? */
181 desc.componentType = kAudioUnitType_Output;
182 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
183 /* NOTE: and if default output isn't Apple? */
184 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
185 desc.componentFlags = 0;
186 desc.componentFlagsMask = 0;
187 ret = -E_DEFAULT_COMP;
188 comp = FindNextComponent(NULL, &desc);
189 if (!comp)
190 goto e0;
191 ret = -E_OPEN_COMP;
192 if (OpenAComponent(comp, &powd->output))
193 goto e0;
194 ret = -E_UNIT_INIT;
195 if (AudioUnitInitialize(powd->output))
196 goto e1;
197 powd->size = 0;
198 powd->ptr = NULL;
199 powd->play = 0;
200 /* Hmmm, let's choose PCM format */
201 /* We tell the Output Unit what format we're going to supply data to it.
202 * This is necessary if you're providing data through an input callback
203 * AND you want the DefaultOutputUnit to do any format conversions
204 * necessary from your format to the device's format.
205 */
206 format.mSampleRate = 44100.0; /* The sample rate of the audio stream */
207 /* The specific encoding type of audio stream*/
208 format.mFormatID = kAudioFormatLinearPCM;
209 /* flags specific to each format */
210 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
211 | kLinearPCMFormatFlagIsBigEndian
212 | kLinearPCMFormatFlagIsPacked;
213 /*
214 * We produce 2-channel audio. Now if we have a mega-super-hyper card for our
215 * audio, it is its problem to convert it to 8-, 16-, 32- or 1024-channel data.
216 */
217 format.mBytesPerFrame = (format.mFramesPerPacket = 1)
218 * (format.mBytesPerPacket = (format.mChannelsPerFrame = 2) * sizeof(float));
219 /* one of the most constant constants of the whole computer history */
220 format.mBitsPerChannel = sizeof(float) * 8;
221 ret = -E_STREAM_FORMAT;
222 if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_StreamFormat,
223 kAudioUnitScope_Input, 0, &format,
224 sizeof(AudioStreamBasicDescription)))
225 goto e2;
226 /* init the semaphore */
227 strcpy(s, "/mpg123-0000");
228 do {
229 for (m = 10;; m--)
230 if( (s[m]++) <= '9')
231 break;
232 else
233 s[m] = '0';
234 } while ((powd->semaphore = sem_open(s, O_CREAT | O_EXCL, 0644, 0))
235 == (sem_t *)SEM_FAILED);
236 init_buffers(powd);
237 ret = -E_ADD_CALLBACK;
238 if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
239 kAudioUnitScope_Input, 0, &inputCallback,
240 sizeof(inputCallback)) < 0)
241 goto e3;
242 return 0;
243 e3:
244 destroy_buffers(powd);
245 e2:
246 AudioUnitUninitialize(powd->output);
247 e1:
248 CloseComponent(powd->output);
249 e0:
250 return ret;
251 }
252
253 __malloc void *osx_write_parse_config(char *options)
254 {
255 struct osx_write_args_info *conf
256 = para_calloc(sizeof(struct osx_write_args_info));
257 PARA_INFO_LOG("options: %s\n", options);
258 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
259 if (ret)
260 goto err_out;
261 return conf;
262 err_out:
263 free(conf);
264 return NULL;
265
266 }
267
268 static void osx_writer_close(struct writer_node *wn)
269 {
270 struct private_osx_writer_data *powd = wn->private_data;
271
272 PARA_INFO_LOG("closing writer node %p\n", wn);
273 AudioOutputUnitStop(powd->output);
274 AudioUnitUninitialize(powd->output);
275 CloseComponent(powd->output);
276 destroy_buffers(powd);
277 sem_close(powd->semaphore);
278 free(powd);
279 }
280
281 static int osx_write_post_select(__a_unused struct sched *s,
282 struct writer_node *wn)
283 {
284 struct private_osx_writer_data *powd = wn->private_data;
285 struct writer_node_group *wng = wn->wng;
286 short *data = (short*)wng->buf + wn->written;
287
288 if (!*wng->loaded)
289 return 1;
290 if (powd->to->remaining) /* Non empty buffer, must still be playing */
291 return 1;
292 fill_buffer(powd->to, data, (*wng->loaded - wn->written) / sizeof(short));
293 powd->to = powd->to->next;
294 wn->written += (*wng->loaded - wn->written);
295 if (!powd->play) {
296 if (AudioOutputUnitStart(powd->output))
297 return -1;
298 powd->play = 1;
299 }
300 return 1;
301 }
302
303 static int osx_write_pre_select(struct sched *s, struct writer_node *wn)
304 {
305 struct writer_node_group *wng = wn->wng;
306 struct private_osx_writer_data *powd = wn->private_data;
307
308 // if (!*wng->loaded)
309 // return 1;
310 // if (powd->to->remaining) /* Non empty buffer, must still be playing */
311 // return 1;
312 s->timeout.tv_sec = 0;
313 s->timeout.tv_usec = 20;
314 return 1;
315 }
316
317 void osx_writer_init(struct writer *w)
318 {
319 w->open = osx_writer_open;
320 w->close = osx_writer_close;
321 w->pre_select = osx_write_pre_select;
322 w->post_select = osx_write_post_select;
323 w->parse_config = osx_write_parse_config;
324 w->shutdown = NULL; /* nothing to do */
325 }