allow variable arguments in LOG functions to be omitted or empty.
[paraslash.git] / osx_write.c
1 /*
2 * Copyright (C) 2006-2007 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_write.c paraslash's output plugin for MacOs */
20
21 /*
22 * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
23 * <skortze@sourceforge.net>
24 */
25
26 #include <CoreAudio/CoreAudio.h>
27 #include "para.h"
28 #include "fd.h"
29 #include "string.h"
30 #include "list.h"
31 #include "sched.h"
32 #include "write.h"
33 #include "osx_write.cmdline.h"
34 #include "error.h"
35
36
37 #include <CoreAudio/CoreAudio.h>
38 #include <AudioUnit/AudioUnit.h>
39 #include <AudioToolbox/DefaultAudioOutput.h>
40
41 /** describes one input buffer for the osx writer */
42 struct osx_buffer {
43 /** pointer to the beginning of the buffer */
44 float *buffer;
45 /** the size of this buffer */
46 long size;
47 /** current position in the buffer */
48 float *ptr;
49 /** number of floats not yet consuned */
50 long remaining;
51 /** pointer to the next audio buffer */
52 struct osx_buffer *next;
53 };
54
55 /** data specific to the osx writer */
56 struct private_osx_write_data {
57 /** the main control structure for audio data manipulation */
58 AudioUnit audio_unit;
59 /** non-zero if playback has started */
60 char play;
61 /** callback reads audio data from this buffer */
62 struct osx_buffer *from;
63 /** the post_select writes audio data here */
64 struct osx_buffer *to;
65 /** sample rate of the current audio stream */
66 unsigned samplerate;
67 /** number of channels of the current audio stream */
68 unsigned channels;
69 };
70
71 static void destroy_buffers(struct private_osx_write_data *powd)
72 {
73 struct osx_buffer *ptr;
74 struct osx_buffer *ptr2;
75 ptr = powd->to->next;
76 powd->to->next = NULL;
77 while (ptr) {
78 ptr2 = ptr->next;
79 free(ptr->buffer);
80 free(ptr);
81 ptr = ptr2;
82 }
83 }
84
85 static void init_buffers(struct writer_node *wn)
86 {
87 struct private_osx_write_data *powd = wn->private_data;
88 struct osx_write_args_info *conf = wn->conf;
89 struct osx_buffer **ptrptr;
90 int i;
91
92 ptrptr = &powd->to;
93 for (i = 0; i < conf->numbuffers_arg; i++) {
94 *ptrptr = malloc(sizeof(struct osx_buffer));
95 (*ptrptr)->size = 0;
96 (*ptrptr)->remaining = 0;
97 (*ptrptr)->buffer = NULL;
98 ptrptr = &(*ptrptr)->next;
99 }
100 *ptrptr = powd->from = powd->to;
101 }
102
103 static void fill_buffer(struct osx_buffer *b, short *source, long size)
104 {
105 float *dest;
106
107 if (b->remaining) /* Non empty buffer, must still be playing */
108 return;
109 if (b->size != size) {
110 b->buffer = para_realloc(b->buffer, size * sizeof(float));
111 b->size = size;
112 }
113 dest = b->buffer;
114 while (size--)
115 *dest++ = (*source++) / 32768.0;
116 b->ptr = b->buffer;
117 b->remaining = b->size;
118 }
119
120 static OSStatus osx_callback(void * inClientData,
121 __a_unused AudioUnitRenderActionFlags *inActionFlags,
122 __a_unused const AudioTimeStamp *inTimeStamp,
123 __a_unused UInt32 inBusNumber,
124 __a_unused UInt32 inNumFrames,
125 AudioBufferList *outOutputData)
126 {
127 long m, n;
128 float *dest;
129 int i;
130 struct private_osx_write_data *powd = inClientData;
131
132 // PARA_INFO_LOG("%p\n", powd);
133 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
134 /* what we have to fill */
135 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
136 dest = outOutputData->mBuffers[i].mData;
137 while (m > 0) {
138 if ((n = powd->from->remaining) <= 0) {
139 PARA_INFO_LOG("%s", "buffer underrun\n");
140 return 0;
141 }
142 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
143 /*
144 * we dump what we can. In fact, just the necessary
145 * should be sufficient
146 */
147 if (n > m)
148 n = m;
149 memcpy(dest, powd->from->ptr, n * sizeof(float));
150 dest += n;
151 /* remember all done work */
152 m -= n;
153 powd->from->ptr += n;
154 if ((powd->from->remaining -= n) <= 0)
155 powd->from = powd->from->next;
156 }
157 }
158 return 0;
159 }
160
161 static int osx_write_open(struct writer_node *wn)
162 {
163 struct private_osx_write_data *powd = para_calloc(
164 sizeof(struct private_osx_write_data));
165 ComponentDescription desc;
166 Component comp;
167 AURenderCallbackStruct inputCallback = {osx_callback, powd};
168 AudioStreamBasicDescription format;
169 int ret;
170 struct writer_node_group *wng = wn->wng;
171 struct osx_write_args_info *conf = wn->conf;
172
173 wn->private_data = powd;
174 /* where did that default audio output go? */
175 desc.componentType = kAudioUnitType_Output;
176 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
177 /* NOTE: and if default output isn't Apple? */
178 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
179 desc.componentFlags = 0;
180 desc.componentFlagsMask = 0;
181 ret = -E_DEFAULT_COMP;
182 comp = FindNextComponent(NULL, &desc);
183 if (!comp)
184 goto e0;
185 ret = -E_OPEN_COMP;
186 if (OpenAComponent(comp, &powd->audio_unit))
187 goto e0;
188 ret = -E_UNIT_INIT;
189 if (AudioUnitInitialize(powd->audio_unit))
190 goto e1;
191 powd->play = 0;
192 /* Hmmm, let's choose PCM format */
193 /* We tell the Output Unit what format we're going to supply data to it.
194 * This is necessary if you're providing data through an input callback
195 * AND you want the DefaultOutputUnit to do any format conversions
196 * necessary from your format to the device's format.
197 */
198 if (!conf->samplerate_given && wng->samplerate)
199 powd->samplerate = *wng->samplerate;
200 else
201 powd->samplerate = conf->samplerate_arg;
202 format.mSampleRate = powd->samplerate;
203 /* The specific encoding type of audio stream*/
204 format.mFormatID = kAudioFormatLinearPCM;
205 /* flags specific to each format */
206 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
207 | kLinearPCMFormatFlagIsPacked
208 | kLinearPCMFormatFlagIsBigEndian;
209 if (!conf->channels_given && wng->channels)
210 powd->channels = *wng->channels;
211 else
212 powd->channels = conf->channels_arg;
213 format.mChannelsPerFrame = powd->channels;
214 format.mFramesPerPacket = 1;
215 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
216 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
217 /* one of the most constant constants of the whole computer history */
218 format.mBitsPerChannel = sizeof(float) * 8;
219 ret = -E_STREAM_FORMAT;
220 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
221 kAudioUnitScope_Input, 0, &format,
222 sizeof(AudioStreamBasicDescription)))
223 goto e2;
224 init_buffers(wn);
225 ret = -E_ADD_CALLBACK;
226 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
227 kAudioUnitScope_Input, 0, &inputCallback,
228 sizeof(inputCallback)) < 0)
229 goto e3;
230 return 1;
231 e3:
232 destroy_buffers(powd);
233 e2:
234 AudioUnitUninitialize(powd->audio_unit);
235 e1:
236 CloseComponent(powd->audio_unit);
237 e0:
238 return ret;
239 }
240
241 __malloc static void *osx_write_parse_config(const char *options)
242 {
243 struct osx_write_args_info *conf
244 = para_calloc(sizeof(struct osx_write_args_info));
245 PARA_INFO_LOG("options: %s\n", options);
246 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
247 if (ret)
248 goto err_out;
249 return conf;
250 err_out:
251 free(conf);
252 return NULL;
253
254 }
255
256 static void osx_write_close(struct writer_node *wn)
257 {
258 struct private_osx_write_data *powd = wn->private_data;
259
260 PARA_INFO_LOG("closing writer node %p\n", wn);
261 AudioOutputUnitStop(powd->audio_unit);
262 AudioUnitUninitialize(powd->audio_unit);
263 CloseComponent(powd->audio_unit);
264 destroy_buffers(powd);
265 free(powd);
266 }
267
268 static int need_new_buffer(struct writer_node *wn)
269 {
270 struct writer_node_group *wng = wn->wng;
271 struct private_osx_write_data *powd = wn->private_data;
272
273 if (*wng->loaded < sizeof(short))
274 return 0;
275 if (powd->to->remaining) /* Non empty buffer, must still be playing */
276 return 0;
277 return 1;
278 }
279
280 static int osx_write_post_select(__a_unused struct sched *s,
281 struct writer_node *wn)
282 {
283 struct private_osx_write_data *powd = wn->private_data;
284 struct writer_node_group *wng = wn->wng;
285 short *data = (short*)wng->buf;
286
287 if (!need_new_buffer(wn))
288 return 1;
289 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
290 powd->to = powd->to->next;
291 wn->written = *wng->loaded;
292 if (!powd->play) {
293 if (AudioOutputUnitStart(powd->audio_unit))
294 return -E_UNIT_START;
295 powd->play = 1;
296 }
297 return 1;
298 }
299
300 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
301 {
302 struct private_osx_write_data *powd = wn->private_data;
303 struct writer_node_group *wng = wn->wng;
304 size_t numbytes = powd->to->remaining * sizeof(short);
305 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
306 unsigned long divisor;
307
308 if (!numbytes && *wng->loaded >= sizeof(short))
309 goto min_delay; /* there's a buffer to fill */
310 if (!numbytes)
311 return 1;
312 divisor = powd->samplerate * powd->channels * 2 / numbytes;
313 if (divisor)
314 tv_divide(divisor, &tmp, &delay);
315 if (tv_diff(&s->timeout, &delay, NULL) > 0)
316 s->timeout = delay;
317 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
318 // (long unsigned) s->timeout.tv_usec);
319 return 1;
320 min_delay:
321 PARA_DEBUG_LOG("%s\n", "minimal delay");
322 s->timeout.tv_sec = 0;
323 s->timeout.tv_usec = 1;
324 return 1;
325 }
326
327 /** the init function of the osx writer */
328 void osx_write_init(struct writer *w)
329 {
330 w->open = osx_write_open;
331 w->close = osx_write_close;
332 w->pre_select = osx_write_pre_select;
333 w->post_select = osx_write_post_select;
334 w->parse_config = osx_write_parse_config;
335 w->shutdown = NULL; /* nothing to do */
336 }