45d6802adc9ebe4c105e65b38e97721d63d0da25
[paraslash.git] / osx_write.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_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 struct private_osx_write_data {
56 AudioUnit output;
57 char play;
58 struct osx_buffer *from; /* Current buffers */
59 struct osx_buffer *to;
60 unsigned samplerate;
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 = 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 char *tmp = (char *)source;
109 char c = *tmp;
110 *tmp = *(tmp + 1);
111 *(tmp + 1) = c;
112 /* *dest++ = ((*source++) + 32768) / 65536.0; */
113 *dest++ = (*source++) / 32768.0;
114 }
115 b->ptr = b->buffer;
116 b->remaining = b->size;
117 }
118
119 static OSStatus osx_callback(void * inClientData,
120 __a_unused AudioUnitRenderActionFlags *inActionFlags,
121 __a_unused const AudioTimeStamp *inTimeStamp,
122 __a_unused UInt32 inBusNumber,
123 __a_unused UInt32 inNumFrames,
124 AudioBufferList *outOutputData)
125 {
126 long m, n;
127 float *dest;
128 int i;
129 struct private_osx_write_data *powd = inClientData;
130
131 // PARA_INFO_LOG("%p\n", powd);
132 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
133 /* what we have to fill */
134 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
135 dest = outOutputData->mBuffers[i].mData;
136 while (m > 0) {
137 if ((n = powd->from->remaining) <= 0) {
138 PARA_INFO_LOG("%s", "buffer underrun\n");
139 /* no more bytes in the current read buffer! */
140 while ((n = powd->from->remaining) <= 0)
141 /* wait for the results */
142 usleep(2000);
143 }
144 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
145 /*
146 * we dump what we can. In fact, just the necessary
147 * should be sufficient
148 */
149 if (n > m)
150 n = m;
151 memcpy(dest, powd->from->ptr, n * sizeof(float));
152 dest += n;
153 /* remember all done work */
154 m -= n;
155 powd->from->ptr += n;
156 if ((powd->from->remaining -= n) <= 0)
157 powd->from = powd->from->next;
158 }
159 }
160 return 0;
161 }
162
163 static int osx_write_open(struct writer_node *wn)
164 {
165 struct private_osx_write_data *powd = para_calloc(
166 sizeof(struct private_osx_write_data));
167 ComponentDescription desc;
168 Component comp;
169 AURenderCallbackStruct inputCallback = {osx_callback, powd};
170 AudioStreamBasicDescription format;
171 int ret;
172 struct writer_node_group *wng = wn->wng;
173 struct osx_write_args_info *conf = wn->conf;
174
175 wn->private_data = powd;
176 /* where did that default audio output go? */
177 desc.componentType = kAudioUnitType_Output;
178 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
179 /* NOTE: and if default output isn't Apple? */
180 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
181 desc.componentFlags = 0;
182 desc.componentFlagsMask = 0;
183 ret = -E_DEFAULT_COMP;
184 comp = FindNextComponent(NULL, &desc);
185 if (!comp)
186 goto e0;
187 ret = -E_OPEN_COMP;
188 if (OpenAComponent(comp, &powd->output))
189 goto e0;
190 ret = -E_UNIT_INIT;
191 if (AudioUnitInitialize(powd->output))
192 goto e1;
193 powd->play = 0;
194 /* Hmmm, let's choose PCM format */
195 /* We tell the Output Unit what format we're going to supply data to it.
196 * This is necessary if you're providing data through an input callback
197 * AND you want the DefaultOutputUnit to do any format conversions
198 * necessary from your format to the device's format.
199 */
200 if (!conf->samplerate_given && wng->samplerate)
201 powd->samplerate = *wng->samplerate;
202 else
203 powd->samplerate = conf->samplerate_arg;
204 format.mSampleRate = powd->samplerate;
205 /* The specific encoding type of audio stream*/
206 format.mFormatID = kAudioFormatLinearPCM;
207 /* flags specific to each format */
208 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
209 | kLinearPCMFormatFlagIsPacked
210 | kLinearPCMFormatFlagIsBigEndian;
211 if (!conf->channels_given && wng->channels)
212 powd->channels = *wng->channels;
213 else
214 powd->channels = conf->channels_arg;
215 format.mChannelsPerFrame = powd->channels;
216 format.mFramesPerPacket = 1;
217 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
218 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
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_buffers(wn);
227 ret = -E_ADD_CALLBACK;
228 if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
229 kAudioUnitScope_Input, 0, &inputCallback,
230 sizeof(inputCallback)) < 0)
231 goto e3;
232 return 1;
233 e3:
234 destroy_buffers(powd);
235 e2:
236 AudioUnitUninitialize(powd->output);
237 e1:
238 CloseComponent(powd->output);
239 e0:
240 return ret;
241 }
242
243 __malloc void *osx_write_parse_config(char *options)
244 {
245 struct osx_write_args_info *conf
246 = para_calloc(sizeof(struct osx_write_args_info));
247 PARA_INFO_LOG("options: %s\n", options);
248 int ret = osx_cmdline_parser_string(options, conf, "osx_write");
249 if (ret)
250 goto err_out;
251 return conf;
252 err_out:
253 free(conf);
254 return NULL;
255
256 }
257
258 static void osx_write_close(struct writer_node *wn)
259 {
260 struct private_osx_write_data *powd = wn->private_data;
261
262 PARA_INFO_LOG("closing writer node %p\n", wn);
263 AudioOutputUnitStop(powd->output);
264 AudioUnitUninitialize(powd->output);
265 CloseComponent(powd->output);
266 destroy_buffers(powd);
267 free(powd);
268 }
269
270 static int need_new_buffer(struct writer_node *wn)
271 {
272 struct writer_node_group *wng = wn->wng;
273 struct private_osx_write_data *powd = wn->private_data;
274
275 if (*wng->loaded < sizeof(short))
276 return 0;
277 if (powd->to->remaining) /* Non empty buffer, must still be playing */
278 return 0;
279 return 1;
280 }
281
282 static int osx_write_post_select(__a_unused struct sched *s,
283 struct writer_node *wn)
284 {
285 struct private_osx_write_data *powd = wn->private_data;
286 struct writer_node_group *wng = wn->wng;
287 short *data = (short*)wng->buf;
288
289 if (!need_new_buffer(wn))
290 return 1;
291 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
292 powd->to = powd->to->next;
293 wn->written = *wng->loaded;
294 if (!powd->play) {
295 if (AudioOutputUnitStart(powd->output))
296 return -E_UNIT_START;
297 powd->play = 1;
298 }
299 return 1;
300 }
301
302 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
303 {
304 struct private_osx_write_data *powd = wn->private_data;
305 struct writer_node_group *wng = wn->wng;
306 size_t numbytes = powd->to->remaining * sizeof(short);
307 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
308 unsigned long divisor;
309
310 if (!numbytes && *wng->loaded >= sizeof(short))
311 goto min_delay; /* there's a buffer to fill */
312 if (!numbytes)
313 return 1;
314 divisor = powd->samplerate * powd->channels * 2 / numbytes;
315 if (divisor)
316 tv_divide(divisor, &tmp, &delay);
317 if (tv_diff(&s->timeout, &delay, NULL) > 0)
318 s->timeout = delay;
319 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
320 // (long unsigned) s->timeout.tv_usec);
321 return 1;
322 min_delay:
323 PARA_DEBUG_LOG("%s\n", "minimal delay");
324 s->timeout.tv_sec = 0;
325 s->timeout.tv_usec = 1;
326 return 1;
327 }
328
329 void osx_write_init(struct writer *w)
330 {
331 w->open = osx_write_open;
332 w->close = osx_write_close;
333 w->pre_select = osx_write_pre_select;
334 w->post_select = osx_write_post_select;
335 w->parse_config = osx_write_parse_config;
336 w->shutdown = NULL; /* nothing to do */
337 }