2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
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.
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.
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.
19 /** \file osx_write.c paraslash's output plugin for MacOs */
22 * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
23 * <skortze@sourceforge.net>
26 #include <CoreAudio/CoreAudio.h>
33 #include "osx_write.cmdline.h"
37 #include <CoreAudio/CoreAudio.h>
38 #include <AudioUnit/AudioUnit.h>
39 #include <AudioToolbox/DefaultAudioOutput.h>
41 /** describes one input buffer for the osx writer */
43 /** pointer to the beginning of the buffer */
45 /** the size of this buffer */
47 /* current position in the buffer */
49 /** number of floats not yet consuned */
51 /** pointer to the next audio buffer */
52 struct osx_buffer *next;
55 struct private_osx_write_data {
58 struct osx_buffer *from; /* Current buffers */
59 struct osx_buffer *to;
64 static void destroy_buffers(struct private_osx_write_data *powd)
66 struct osx_buffer *ptr;
67 struct osx_buffer *ptr2;
69 powd->to->next = NULL;
78 static void init_buffers(struct writer_node *wn)
80 struct private_osx_write_data *powd = wn->private_data;
81 struct osx_write_args_info *conf = wn->conf;
82 struct osx_buffer **ptrptr;
86 for (i = 0; i < conf->numbuffers_arg; i++) {
87 *ptrptr = malloc(sizeof(struct osx_buffer));
89 (*ptrptr)->remaining = 0;
90 (*ptrptr)->buffer = NULL;
91 ptrptr = &(*ptrptr)->next;
93 *ptrptr = powd->from = powd->to;
96 static void fill_buffer(struct osx_buffer *b, short *source, long size)
100 if (b->remaining) /* Non empty buffer, must still be playing */
102 if (b->size != size) {
103 b->buffer = para_realloc(b->buffer, size * sizeof(float));
108 char *tmp = (char *)source;
112 /* *dest++ = ((*source++) + 32768) / 65536.0; */
113 *dest++ = (*source++) / 32768.0;
116 b->remaining = b->size;
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)
129 struct private_osx_write_data *powd = inClientData;
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;
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 */
144 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
146 * we dump what we can. In fact, just the necessary
147 * should be sufficient
151 memcpy(dest, powd->from->ptr, n * sizeof(float));
153 /* remember all done work */
155 powd->from->ptr += n;
156 if ((powd->from->remaining -= n) <= 0)
157 powd->from = powd->from->next;
163 static int osx_write_open(struct writer_node *wn)
165 struct private_osx_write_data *powd = para_calloc(
166 sizeof(struct private_osx_write_data));
167 ComponentDescription desc;
169 AURenderCallbackStruct inputCallback = {osx_callback, powd};
170 AudioStreamBasicDescription format;
172 struct writer_node_group *wng = wn->wng;
173 struct osx_write_args_info *conf = wn->conf;
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);
188 if (OpenAComponent(comp, &powd->output))
191 if (AudioUnitInitialize(powd->output))
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.
200 if (!conf->samplerate_given && wng->samplerate)
201 powd->samplerate = *wng->samplerate;
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;
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)))
227 ret = -E_ADD_CALLBACK;
228 if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
229 kAudioUnitScope_Input, 0, &inputCallback,
230 sizeof(inputCallback)) < 0)
234 destroy_buffers(powd);
236 AudioUnitUninitialize(powd->output);
238 CloseComponent(powd->output);
243 __malloc void *osx_write_parse_config(char *options)
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");
258 static void osx_write_close(struct writer_node *wn)
260 struct private_osx_write_data *powd = wn->private_data;
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);
270 static int need_new_buffer(struct writer_node *wn)
272 struct writer_node_group *wng = wn->wng;
273 struct private_osx_write_data *powd = wn->private_data;
275 if (*wng->loaded < sizeof(short))
277 if (powd->to->remaining) /* Non empty buffer, must still be playing */
282 static int osx_write_post_select(__a_unused struct sched *s,
283 struct writer_node *wn)
285 struct private_osx_write_data *powd = wn->private_data;
286 struct writer_node_group *wng = wn->wng;
287 short *data = (short*)wng->buf;
289 if (!need_new_buffer(wn))
291 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
292 powd->to = powd->to->next;
293 wn->written = *wng->loaded;
295 if (AudioOutputUnitStart(powd->output))
296 return -E_UNIT_START;
302 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
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;
310 if (!numbytes && *wng->loaded >= sizeof(short))
311 goto min_delay; /* there's a buffer to fill */
314 divisor = powd->samplerate * powd->channels * 2 / numbytes;
316 tv_divide(divisor, &tmp, &delay);
317 if (tv_diff(&s->timeout, &delay, NULL) > 0)
319 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
320 // (long unsigned) s->timeout.tv_usec);
323 PARA_DEBUG_LOG("%s\n", "minimal delay");
324 s->timeout.tv_sec = 0;
325 s->timeout.tv_usec = 1;
329 void osx_write_init(struct writer *w)
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 */