Merge branch 'maint' into next
[paraslash.git] / osx_write.c
1 /*
2 * Copyright (C) 2006-2009 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 <regex.h>
15 #include <sys/types.h>
16 #include <dirent.h>
17 #include <CoreAudio/CoreAudio.h>
18
19 #include "para.h"
20 #include "fd.h"
21 #include "string.h"
22 #include "list.h"
23 #include "sched.h"
24 #include "ggo.h"
25 #include "write.h"
26 #include "osx_write.cmdline.h"
27 #include "error.h"
28
29
30 #include <CoreAudio/CoreAudio.h>
31 #include <AudioUnit/AudioUnit.h>
32 #include <AudioToolbox/DefaultAudioOutput.h>
33
34 /** describes one input buffer for the osx writer */
35 struct osx_buffer {
36 /** pointer to the beginning of the buffer */
37 float *buffer;
38 /** the size of this buffer */
39 long size;
40 /** current position in the buffer */
41 float *ptr;
42 /** number of floats not yet consuned */
43 long remaining;
44 /** pointer to the next audio buffer */
45 struct osx_buffer *next;
46 };
47
48 /** data specific to the osx writer */
49 struct private_osx_write_data {
50 /** the main control structure for audio data manipulation */
51 AudioUnit audio_unit;
52 /** non-zero if playback has started */
53 char play;
54 /** callback reads audio data from this buffer */
55 struct osx_buffer *from;
56 /** the post_select writes audio data here */
57 struct osx_buffer *to;
58 /** sample rate of the current audio stream */
59 unsigned samplerate;
60 /** number of channels of the current audio stream */
61 unsigned channels;
62 };
63
64 static void destroy_buffers(struct private_osx_write_data *powd)
65 {
66 struct osx_buffer *ptr;
67 struct osx_buffer *ptr2;
68 ptr = powd->to->next;
69 powd->to->next = NULL;
70 while (ptr) {
71 ptr2 = ptr->next;
72 free(ptr->buffer);
73 free(ptr);
74 ptr = ptr2;
75 }
76 }
77
78 static void init_buffers(struct writer_node *wn)
79 {
80 struct private_osx_write_data *powd = wn->private_data;
81 struct osx_write_args_info *conf = wn->conf;
82 struct osx_buffer **ptrptr;
83 int i;
84
85 ptrptr = &powd->to;
86 for (i = 0; i < conf->numbuffers_arg; i++) {
87 *ptrptr = para_malloc(sizeof(struct osx_buffer));
88 (*ptrptr)->size = 0;
89 (*ptrptr)->remaining = 0;
90 (*ptrptr)->buffer = NULL;
91 ptrptr = &(*ptrptr)->next;
92 }
93 *ptrptr = powd->from = powd->to;
94 }
95
96 static void fill_buffer(struct osx_buffer *b, short *source, long size)
97 {
98 float *dest;
99
100 if (b->remaining) /* Non empty buffer, must still be playing */
101 return;
102 if (b->size != size) {
103 b->buffer = para_realloc(b->buffer, size * sizeof(float));
104 b->size = size;
105 }
106 dest = b->buffer;
107 while (size--)
108 *dest++ = (*source++) / 32768.0;
109 b->ptr = b->buffer;
110 b->remaining = b->size;
111 }
112
113 static OSStatus osx_callback(void * inClientData,
114 __a_unused AudioUnitRenderActionFlags *inActionFlags,
115 __a_unused const AudioTimeStamp *inTimeStamp,
116 __a_unused UInt32 inBusNumber,
117 __a_unused UInt32 inNumFrames,
118 AudioBufferList *outOutputData)
119 {
120 long m, n;
121 float *dest;
122 int i;
123 struct private_osx_write_data *powd = inClientData;
124
125 // PARA_INFO_LOG("%p\n", powd);
126 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
127 /* what we have to fill */
128 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
129 dest = outOutputData->mBuffers[i].mData;
130 while (m > 0) {
131 if ((n = powd->from->remaining) <= 0) {
132 PARA_INFO_LOG("buffer underrun\n");
133 return 0;
134 }
135 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
136 /*
137 * we dump what we can. In fact, just the necessary
138 * should be sufficient
139 */
140 if (n > m)
141 n = m;
142 memcpy(dest, powd->from->ptr, n * sizeof(float));
143 dest += n;
144 /* remember all done work */
145 m -= n;
146 powd->from->ptr += n;
147 if ((powd->from->remaining -= n) <= 0)
148 powd->from = powd->from->next;
149 }
150 }
151 return 0;
152 }
153
154 #ifdef WORDS_BIGENDIAN /* ppc */
155 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
156 #else
157 #define ENDIAN_FLAGS 0
158 #endif
159
160 static int osx_write_open(struct writer_node *wn)
161 {
162 struct private_osx_write_data *powd = para_calloc(
163 sizeof(struct private_osx_write_data));
164 ComponentDescription desc;
165 Component comp;
166 AURenderCallbackStruct inputCallback = {osx_callback, powd};
167 AudioStreamBasicDescription format;
168 int ret;
169 struct writer_node_group *wng = wn->wng;
170 struct osx_write_args_info *conf = wn->conf;
171
172 wn->private_data = powd;
173 /* where did that default audio output go? */
174 desc.componentType = kAudioUnitType_Output;
175 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
176 /* NOTE: and if default output isn't Apple? */
177 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
178 desc.componentFlags = 0;
179 desc.componentFlagsMask = 0;
180 ret = -E_DEFAULT_COMP;
181 comp = FindNextComponent(NULL, &desc);
182 if (!comp)
183 goto e0;
184 ret = -E_OPEN_COMP;
185 if (OpenAComponent(comp, &powd->audio_unit))
186 goto e0;
187 ret = -E_UNIT_INIT;
188 if (AudioUnitInitialize(powd->audio_unit))
189 goto e1;
190 powd->play = 0;
191 /* Hmmm, let's choose PCM format */
192 /* We tell the Output Unit what format we're going to supply data to it.
193 * This is necessary if you're providing data through an input callback
194 * AND you want the DefaultOutputUnit to do any format conversions
195 * necessary from your format to the device's format.
196 */
197 if (!conf->samplerate_given && wng->samplerate)
198 powd->samplerate = *wng->samplerate;
199 else
200 powd->samplerate = conf->samplerate_arg;
201 format.mSampleRate = powd->samplerate;
202 /* The specific encoding type of audio stream*/
203 format.mFormatID = kAudioFormatLinearPCM;
204 /* flags specific to each format */
205 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
206 | kLinearPCMFormatFlagIsPacked
207 | ENDIAN_FLAGS;
208 if (!conf->channels_given && wng->channels)
209 powd->channels = *wng->channels;
210 else
211 powd->channels = conf->channels_arg;
212 format.mChannelsPerFrame = powd->channels;
213 format.mFramesPerPacket = 1;
214 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
215 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
216 /* one of the most constant constants of the whole computer history */
217 format.mBitsPerChannel = sizeof(float) * 8;
218 ret = -E_STREAM_FORMAT;
219 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
220 kAudioUnitScope_Input, 0, &format,
221 sizeof(AudioStreamBasicDescription)))
222 goto e2;
223 init_buffers(wn);
224 ret = -E_ADD_CALLBACK;
225 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
226 kAudioUnitScope_Input, 0, &inputCallback,
227 sizeof(inputCallback)) < 0)
228 goto e3;
229 return 1;
230 e3:
231 destroy_buffers(powd);
232 e2:
233 AudioUnitUninitialize(powd->audio_unit);
234 e1:
235 CloseComponent(powd->audio_unit);
236 e0:
237 return ret;
238 }
239
240 __malloc static void *osx_write_parse_config(const char *options)
241 {
242 struct osx_write_args_info *conf
243 = para_calloc(sizeof(struct osx_write_args_info));
244 PARA_INFO_LOG("options: %s\n", options);
245 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
246 if (ret)
247 goto err_out;
248 return conf;
249 err_out:
250 free(conf);
251 return NULL;
252
253 }
254
255 static void osx_write_close(struct writer_node *wn)
256 {
257 struct private_osx_write_data *powd = wn->private_data;
258
259 PARA_INFO_LOG("closing writer node %p\n", wn);
260 AudioOutputUnitStop(powd->audio_unit);
261 AudioUnitUninitialize(powd->audio_unit);
262 CloseComponent(powd->audio_unit);
263 destroy_buffers(powd);
264 free(powd);
265 }
266
267 static int need_new_buffer(struct writer_node *wn)
268 {
269 struct writer_node_group *wng = wn->wng;
270 struct private_osx_write_data *powd = wn->private_data;
271
272 if (*wng->loaded < sizeof(short))
273 return 0;
274 if (powd->to->remaining) /* Non empty buffer, must still be playing */
275 return 0;
276 return 1;
277 }
278
279 static int osx_write_post_select(__a_unused struct sched *s,
280 struct writer_node *wn)
281 {
282 struct private_osx_write_data *powd = wn->private_data;
283 struct writer_node_group *wng = wn->wng;
284 short *data = (short*)*wng->bufp;
285
286 if (!need_new_buffer(wn))
287 return 1;
288 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
289 powd->to = powd->to->next;
290 wn->written = *wng->loaded;
291 if (!powd->play) {
292 if (AudioOutputUnitStart(powd->audio_unit))
293 return -E_UNIT_START;
294 powd->play = 1;
295 }
296 return 1;
297 }
298
299 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
300 {
301 struct private_osx_write_data *powd = wn->private_data;
302 struct writer_node_group *wng = wn->wng;
303 size_t numbytes = powd->to->remaining * sizeof(short);
304 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
305 unsigned long divisor;
306
307 if (!numbytes && *wng->loaded >= sizeof(short))
308 goto min_delay; /* there's a buffer to fill */
309 if (!numbytes)
310 return 1;
311 divisor = powd->samplerate * powd->channels * 2 / numbytes;
312 if (divisor)
313 tv_divide(divisor, &tmp, &delay);
314 if (tv_diff(&s->timeout, &delay, NULL) > 0)
315 s->timeout = delay;
316 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
317 // (long unsigned) s->timeout.tv_usec);
318 return 1;
319 min_delay:
320 PARA_DEBUG_LOG("%s\n", "minimal delay");
321 s->timeout.tv_sec = 0;
322 s->timeout.tv_usec = 1;
323 return 1;
324 }
325
326 /** the init function of the osx writer */
327 void osx_write_init(struct writer *w)
328 {
329 w->open = osx_write_open;
330 w->close = osx_write_close;
331 w->pre_select = osx_write_pre_select;
332 w->post_select = osx_write_post_select;
333 w->parse_config = osx_write_parse_config;
334 w->shutdown = NULL; /* nothing to do */
335 }