107746c78e83f8f875d640a27114ee0d57eb01fa
[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 char *tmp = (char *)source;
116 char c = *tmp;
117 *tmp = *(tmp + 1);
118 *(tmp + 1) = c;
119 /* *dest++ = ((*source++) + 32768) / 65536.0; */
120 *dest++ = (*source++) / 32768.0;
121 }
122 b->ptr = b->buffer;
123 b->remaining = b->size;
124 }
125
126 static OSStatus osx_callback(void * inClientData,
127 __a_unused AudioUnitRenderActionFlags *inActionFlags,
128 __a_unused const AudioTimeStamp *inTimeStamp,
129 __a_unused UInt32 inBusNumber,
130 __a_unused UInt32 inNumFrames,
131 AudioBufferList *outOutputData)
132 {
133 long m, n;
134 float *dest;
135 int i;
136 struct private_osx_write_data *powd = inClientData;
137
138 // PARA_INFO_LOG("%p\n", powd);
139 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
140 /* what we have to fill */
141 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
142 dest = outOutputData->mBuffers[i].mData;
143 while (m > 0) {
144 if ((n = powd->from->remaining) <= 0) {
145 PARA_INFO_LOG("%s", "buffer underrun\n");
146 return 0;
147 }
148 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
149 /*
150 * we dump what we can. In fact, just the necessary
151 * should be sufficient
152 */
153 if (n > m)
154 n = m;
155 memcpy(dest, powd->from->ptr, n * sizeof(float));
156 dest += n;
157 /* remember all done work */
158 m -= n;
159 powd->from->ptr += n;
160 if ((powd->from->remaining -= n) <= 0)
161 powd->from = powd->from->next;
162 }
163 }
164 return 0;
165 }
166
167 static int osx_write_open(struct writer_node *wn)
168 {
169 struct private_osx_write_data *powd = para_calloc(
170 sizeof(struct private_osx_write_data));
171 ComponentDescription desc;
172 Component comp;
173 AURenderCallbackStruct inputCallback = {osx_callback, powd};
174 AudioStreamBasicDescription format;
175 int ret;
176 struct writer_node_group *wng = wn->wng;
177 struct osx_write_args_info *conf = wn->conf;
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->audio_unit))
193 goto e0;
194 ret = -E_UNIT_INIT;
195 if (AudioUnitInitialize(powd->audio_unit))
196 goto e1;
197 powd->play = 0;
198 /* Hmmm, let's choose PCM format */
199 /* We tell the Output Unit what format we're going to supply data to it.
200 * This is necessary if you're providing data through an input callback
201 * AND you want the DefaultOutputUnit to do any format conversions
202 * necessary from your format to the device's format.
203 */
204 if (!conf->samplerate_given && wng->samplerate)
205 powd->samplerate = *wng->samplerate;
206 else
207 powd->samplerate = conf->samplerate_arg;
208 format.mSampleRate = powd->samplerate;
209 /* The specific encoding type of audio stream*/
210 format.mFormatID = kAudioFormatLinearPCM;
211 /* flags specific to each format */
212 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
213 | kLinearPCMFormatFlagIsPacked
214 | kLinearPCMFormatFlagIsBigEndian;
215 if (!conf->channels_given && wng->channels)
216 powd->channels = *wng->channels;
217 else
218 powd->channels = conf->channels_arg;
219 format.mChannelsPerFrame = powd->channels;
220 format.mFramesPerPacket = 1;
221 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
222 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
223 /* one of the most constant constants of the whole computer history */
224 format.mBitsPerChannel = sizeof(float) * 8;
225 ret = -E_STREAM_FORMAT;
226 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
227 kAudioUnitScope_Input, 0, &format,
228 sizeof(AudioStreamBasicDescription)))
229 goto e2;
230 init_buffers(wn);
231 ret = -E_ADD_CALLBACK;
232 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
233 kAudioUnitScope_Input, 0, &inputCallback,
234 sizeof(inputCallback)) < 0)
235 goto e3;
236 return 1;
237 e3:
238 destroy_buffers(powd);
239 e2:
240 AudioUnitUninitialize(powd->audio_unit);
241 e1:
242 CloseComponent(powd->audio_unit);
243 e0:
244 return ret;
245 }
246
247 __malloc static void *osx_write_parse_config(const char *options)
248 {
249 struct osx_write_args_info *conf
250 = para_calloc(sizeof(struct osx_write_args_info));
251 PARA_INFO_LOG("options: %s\n", options);
252 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
253 if (ret)
254 goto err_out;
255 return conf;
256 err_out:
257 free(conf);
258 return NULL;
259
260 }
261
262 static void osx_write_close(struct writer_node *wn)
263 {
264 struct private_osx_write_data *powd = wn->private_data;
265
266 PARA_INFO_LOG("closing writer node %p\n", wn);
267 AudioOutputUnitStop(powd->audio_unit);
268 AudioUnitUninitialize(powd->audio_unit);
269 CloseComponent(powd->audio_unit);
270 destroy_buffers(powd);
271 free(powd);
272 }
273
274 static int need_new_buffer(struct writer_node *wn)
275 {
276 struct writer_node_group *wng = wn->wng;
277 struct private_osx_write_data *powd = wn->private_data;
278
279 if (*wng->loaded < sizeof(short))
280 return 0;
281 if (powd->to->remaining) /* Non empty buffer, must still be playing */
282 return 0;
283 return 1;
284 }
285
286 static int osx_write_post_select(__a_unused struct sched *s,
287 struct writer_node *wn)
288 {
289 struct private_osx_write_data *powd = wn->private_data;
290 struct writer_node_group *wng = wn->wng;
291 short *data = (short*)wng->buf;
292
293 if (!need_new_buffer(wn))
294 return 1;
295 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
296 powd->to = powd->to->next;
297 wn->written = *wng->loaded;
298 if (!powd->play) {
299 if (AudioOutputUnitStart(powd->audio_unit))
300 return -E_UNIT_START;
301 powd->play = 1;
302 }
303 return 1;
304 }
305
306 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
307 {
308 struct private_osx_write_data *powd = wn->private_data;
309 struct writer_node_group *wng = wn->wng;
310 size_t numbytes = powd->to->remaining * sizeof(short);
311 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
312 unsigned long divisor;
313
314 if (!numbytes && *wng->loaded >= sizeof(short))
315 goto min_delay; /* there's a buffer to fill */
316 if (!numbytes)
317 return 1;
318 divisor = powd->samplerate * powd->channels * 2 / numbytes;
319 if (divisor)
320 tv_divide(divisor, &tmp, &delay);
321 if (tv_diff(&s->timeout, &delay, NULL) > 0)
322 s->timeout = delay;
323 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
324 // (long unsigned) s->timeout.tv_usec);
325 return 1;
326 min_delay:
327 PARA_DEBUG_LOG("%s\n", "minimal delay");
328 s->timeout.tv_sec = 0;
329 s->timeout.tv_usec = 1;
330 return 1;
331 }
332
333 /** the init function of the osx writer */
334 void osx_write_init(struct writer *w)
335 {
336 w->open = osx_write_open;
337 w->close = osx_write_close;
338 w->pre_select = osx_write_pre_select;
339 w->post_select = osx_write_post_select;
340 w->parse_config = osx_write_parse_config;
341 w->shutdown = NULL; /* nothing to do */
342 }