exec and fade cleanups.
[paraslash.git] / osx_write.c
1 /*
2 * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file osx_write.c paraslash's output plugin for MacOs */
8
9 /*
10 * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
11 * <skortze@sourceforge.net>
12 */
13
14 #include <sys/types.h>
15 #include <dirent.h>
16 #include <CoreAudio/CoreAudio.h>
17 #include "para.h"
18 #include "fd.h"
19 #include "string.h"
20 #include "list.h"
21 #include "sched.h"
22 #include "write.h"
23 #include "osx_write.cmdline.h"
24 #include "error.h"
25
26
27 #include <CoreAudio/CoreAudio.h>
28 #include <AudioUnit/AudioUnit.h>
29 #include <AudioToolbox/DefaultAudioOutput.h>
30
31 /** describes one input buffer for the osx writer */
32 struct osx_buffer {
33 /** pointer to the beginning of the buffer */
34 float *buffer;
35 /** the size of this buffer */
36 long size;
37 /** current position in the buffer */
38 float *ptr;
39 /** number of floats not yet consuned */
40 long remaining;
41 /** pointer to the next audio buffer */
42 struct osx_buffer *next;
43 };
44
45 /** data specific to the osx writer */
46 struct private_osx_write_data {
47 /** the main control structure for audio data manipulation */
48 AudioUnit audio_unit;
49 /** non-zero if playback has started */
50 char play;
51 /** callback reads audio data from this buffer */
52 struct osx_buffer *from;
53 /** the post_select writes audio data here */
54 struct osx_buffer *to;
55 /** sample rate of the current audio stream */
56 unsigned samplerate;
57 /** number of channels of the current audio stream */
58 unsigned channels;
59 };
60
61 static void destroy_buffers(struct private_osx_write_data *powd)
62 {
63 struct osx_buffer *ptr;
64 struct osx_buffer *ptr2;
65 ptr = powd->to->next;
66 powd->to->next = NULL;
67 while (ptr) {
68 ptr2 = ptr->next;
69 free(ptr->buffer);
70 free(ptr);
71 ptr = ptr2;
72 }
73 }
74
75 static void init_buffers(struct writer_node *wn)
76 {
77 struct private_osx_write_data *powd = wn->private_data;
78 struct osx_write_args_info *conf = wn->conf;
79 struct osx_buffer **ptrptr;
80 int i;
81
82 ptrptr = &powd->to;
83 for (i = 0; i < conf->numbuffers_arg; i++) {
84 *ptrptr = malloc(sizeof(struct osx_buffer));
85 (*ptrptr)->size = 0;
86 (*ptrptr)->remaining = 0;
87 (*ptrptr)->buffer = NULL;
88 ptrptr = &(*ptrptr)->next;
89 }
90 *ptrptr = powd->from = powd->to;
91 }
92
93 static void fill_buffer(struct osx_buffer *b, short *source, long size)
94 {
95 float *dest;
96
97 if (b->remaining) /* Non empty buffer, must still be playing */
98 return;
99 if (b->size != size) {
100 b->buffer = para_realloc(b->buffer, size * sizeof(float));
101 b->size = size;
102 }
103 dest = b->buffer;
104 while (size--)
105 *dest++ = (*source++) / 32768.0;
106 b->ptr = b->buffer;
107 b->remaining = b->size;
108 }
109
110 static OSStatus osx_callback(void * inClientData,
111 __a_unused AudioUnitRenderActionFlags *inActionFlags,
112 __a_unused const AudioTimeStamp *inTimeStamp,
113 __a_unused UInt32 inBusNumber,
114 __a_unused UInt32 inNumFrames,
115 AudioBufferList *outOutputData)
116 {
117 long m, n;
118 float *dest;
119 int i;
120 struct private_osx_write_data *powd = inClientData;
121
122 // PARA_INFO_LOG("%p\n", powd);
123 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
124 /* what we have to fill */
125 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
126 dest = outOutputData->mBuffers[i].mData;
127 while (m > 0) {
128 if ((n = powd->from->remaining) <= 0) {
129 PARA_INFO_LOG("buffer underrun\n");
130 return 0;
131 }
132 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
133 /*
134 * we dump what we can. In fact, just the necessary
135 * should be sufficient
136 */
137 if (n > m)
138 n = m;
139 memcpy(dest, powd->from->ptr, n * sizeof(float));
140 dest += n;
141 /* remember all done work */
142 m -= n;
143 powd->from->ptr += n;
144 if ((powd->from->remaining -= n) <= 0)
145 powd->from = powd->from->next;
146 }
147 }
148 return 0;
149 }
150
151 static int osx_write_open(struct writer_node *wn)
152 {
153 struct private_osx_write_data *powd = para_calloc(
154 sizeof(struct private_osx_write_data));
155 ComponentDescription desc;
156 Component comp;
157 AURenderCallbackStruct inputCallback = {osx_callback, powd};
158 AudioStreamBasicDescription format;
159 int ret;
160 struct writer_node_group *wng = wn->wng;
161 struct osx_write_args_info *conf = wn->conf;
162
163 wn->private_data = powd;
164 /* where did that default audio output go? */
165 desc.componentType = kAudioUnitType_Output;
166 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
167 /* NOTE: and if default output isn't Apple? */
168 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
169 desc.componentFlags = 0;
170 desc.componentFlagsMask = 0;
171 ret = -E_DEFAULT_COMP;
172 comp = FindNextComponent(NULL, &desc);
173 if (!comp)
174 goto e0;
175 ret = -E_OPEN_COMP;
176 if (OpenAComponent(comp, &powd->audio_unit))
177 goto e0;
178 ret = -E_UNIT_INIT;
179 if (AudioUnitInitialize(powd->audio_unit))
180 goto e1;
181 powd->play = 0;
182 /* Hmmm, let's choose PCM format */
183 /* We tell the Output Unit what format we're going to supply data to it.
184 * This is necessary if you're providing data through an input callback
185 * AND you want the DefaultOutputUnit to do any format conversions
186 * necessary from your format to the device's format.
187 */
188 if (!conf->samplerate_given && wng->samplerate)
189 powd->samplerate = *wng->samplerate;
190 else
191 powd->samplerate = conf->samplerate_arg;
192 format.mSampleRate = powd->samplerate;
193 /* The specific encoding type of audio stream*/
194 format.mFormatID = kAudioFormatLinearPCM;
195 /* flags specific to each format */
196 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
197 | kLinearPCMFormatFlagIsPacked
198 | kLinearPCMFormatFlagIsBigEndian;
199 if (!conf->channels_given && wng->channels)
200 powd->channels = *wng->channels;
201 else
202 powd->channels = conf->channels_arg;
203 format.mChannelsPerFrame = powd->channels;
204 format.mFramesPerPacket = 1;
205 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
206 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
207 /* one of the most constant constants of the whole computer history */
208 format.mBitsPerChannel = sizeof(float) * 8;
209 ret = -E_STREAM_FORMAT;
210 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
211 kAudioUnitScope_Input, 0, &format,
212 sizeof(AudioStreamBasicDescription)))
213 goto e2;
214 init_buffers(wn);
215 ret = -E_ADD_CALLBACK;
216 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
217 kAudioUnitScope_Input, 0, &inputCallback,
218 sizeof(inputCallback)) < 0)
219 goto e3;
220 return 1;
221 e3:
222 destroy_buffers(powd);
223 e2:
224 AudioUnitUninitialize(powd->audio_unit);
225 e1:
226 CloseComponent(powd->audio_unit);
227 e0:
228 return ret;
229 }
230
231 __malloc static void *osx_write_parse_config(const char *options)
232 {
233 struct osx_write_args_info *conf
234 = para_calloc(sizeof(struct osx_write_args_info));
235 PARA_INFO_LOG("options: %s\n", options);
236 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
237 if (ret)
238 goto err_out;
239 return conf;
240 err_out:
241 free(conf);
242 return NULL;
243
244 }
245
246 static void osx_write_close(struct writer_node *wn)
247 {
248 struct private_osx_write_data *powd = wn->private_data;
249
250 PARA_INFO_LOG("closing writer node %p\n", wn);
251 AudioOutputUnitStop(powd->audio_unit);
252 AudioUnitUninitialize(powd->audio_unit);
253 CloseComponent(powd->audio_unit);
254 destroy_buffers(powd);
255 free(powd);
256 }
257
258 static int need_new_buffer(struct writer_node *wn)
259 {
260 struct writer_node_group *wng = wn->wng;
261 struct private_osx_write_data *powd = wn->private_data;
262
263 if (*wng->loaded < sizeof(short))
264 return 0;
265 if (powd->to->remaining) /* Non empty buffer, must still be playing */
266 return 0;
267 return 1;
268 }
269
270 static int osx_write_post_select(__a_unused struct sched *s,
271 struct writer_node *wn)
272 {
273 struct private_osx_write_data *powd = wn->private_data;
274 struct writer_node_group *wng = wn->wng;
275 short *data = (short*)wng->buf;
276
277 if (!need_new_buffer(wn))
278 return 1;
279 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
280 powd->to = powd->to->next;
281 wn->written = *wng->loaded;
282 if (!powd->play) {
283 if (AudioOutputUnitStart(powd->audio_unit))
284 return -E_UNIT_START;
285 powd->play = 1;
286 }
287 return 1;
288 }
289
290 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
291 {
292 struct private_osx_write_data *powd = wn->private_data;
293 struct writer_node_group *wng = wn->wng;
294 size_t numbytes = powd->to->remaining * sizeof(short);
295 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
296 unsigned long divisor;
297
298 if (!numbytes && *wng->loaded >= sizeof(short))
299 goto min_delay; /* there's a buffer to fill */
300 if (!numbytes)
301 return 1;
302 divisor = powd->samplerate * powd->channels * 2 / numbytes;
303 if (divisor)
304 tv_divide(divisor, &tmp, &delay);
305 if (tv_diff(&s->timeout, &delay, NULL) > 0)
306 s->timeout = delay;
307 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
308 // (long unsigned) s->timeout.tv_usec);
309 return 1;
310 min_delay:
311 PARA_DEBUG_LOG("%s\n", "minimal delay");
312 s->timeout.tv_sec = 0;
313 s->timeout.tv_usec = 1;
314 return 1;
315 }
316
317 /** the init function of the osx writer */
318 void osx_write_init(struct writer *w)
319 {
320 w->open = osx_write_open;
321 w->close = osx_write_close;
322 w->pre_select = osx_write_pre_select;
323 w->post_select = osx_write_post_select;
324 w->parse_config = osx_write_parse_config;
325 w->shutdown = NULL; /* nothing to do */
326 }