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>
43 float *ptr; /* Where in the buffer are we? */
45 struct osx_buffer *next;
47 typedef struct osx_buffer osx_buffer; /* FIXME */
49 struct private_osx_write_data {
53 osx_buffer *from; /* Current buffers */
61 * Tried with 3 buffers, but then any little window move is sufficient to
62 * stop the sound (OK, on a G3 400 with a Public Beta. Perhaps now we can
63 * go down to 2 buffers). With 16 buffers we have 1.5 seconds music
64 * buffered (or, if you're pessimistic, 1.5 seconds latency). Note 0
65 * buffers don't work much further than the Bus error.
67 #define NUMBER_BUFFERS 2
69 static void destroy_buffers(struct private_osx_write_data *powd)
74 powd->to->next = NULL;
83 static void init_buffers(struct private_osx_write_data *powd)
89 for (i = 0; i < NUMBER_BUFFERS; i++) {
90 *ptrptr = malloc(sizeof(osx_buffer));
92 (*ptrptr)->remaining = 0;
93 (*ptrptr)->buffer = NULL;
94 ptrptr = &(*ptrptr)->next;
96 *ptrptr = powd->from = powd->to;
99 static void fill_buffer(osx_buffer *b, short *source, long size)
103 if (b->remaining) /* Non empty buffer, must still be playing */
105 if (b->size != size) {
106 b->buffer = para_realloc(b->buffer, size * sizeof(float));
111 char *tmp = (char *)source;
115 /* *dest++ = ((*source++) + 32768) / 65536.0; */
116 *dest++ = (*source++) / 32768.0;
119 b->remaining = b->size;
122 static OSStatus osx_callback(void * inClientData,
123 __a_unused AudioUnitRenderActionFlags *inActionFlags,
124 __a_unused const AudioTimeStamp *inTimeStamp,
125 __a_unused UInt32 inBusNumber,
126 __a_unused UInt32 inNumFrames,
127 AudioBufferList *outOutputData)
132 struct private_osx_write_data *powd = inClientData;
134 // PARA_INFO_LOG("%p\n", powd);
135 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
136 /* what we have to fill */
137 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
138 dest = outOutputData->mBuffers[i].mData;
140 if ((n = powd->from->remaining) <= 0) {
141 PARA_INFO_LOG("%s", "buffer underrun\n");
142 /* no more bytes in the current read buffer! */
143 while ((n = powd->from->remaining) <= 0)
144 /* wait for the results */
147 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
149 * we dump what we can. In fact, just the necessary
150 * should be sufficient
154 memcpy(dest, powd->from->ptr, n * sizeof(float));
156 /* remember all done work */
158 powd->from->ptr += n;
159 if ((powd->from->remaining -= n) <= 0)
160 powd->from = powd->from->next;
166 static int osx_write_open(struct writer_node *wn)
168 struct private_osx_write_data *powd = para_calloc(
169 sizeof(struct private_osx_write_data));
170 ComponentDescription desc;
172 AURenderCallbackStruct inputCallback = {osx_callback, powd};
173 AudioStreamBasicDescription format;
175 struct writer_node_group *wng = wn->wng;
176 struct osx_write_args_info *conf = wn->conf;
178 wn->private_data = powd;
179 /* where did that default audio output go? */
180 desc.componentType = kAudioUnitType_Output;
181 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
182 /* NOTE: and if default output isn't Apple? */
183 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
184 desc.componentFlags = 0;
185 desc.componentFlagsMask = 0;
186 ret = -E_DEFAULT_COMP;
187 comp = FindNextComponent(NULL, &desc);
191 if (OpenAComponent(comp, &powd->output))
194 if (AudioUnitInitialize(powd->output))
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.
204 if (!conf->samplerate_given && wng->samplerate)
205 powd->samplerate = *wng->samplerate;
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;
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->output, kAudioUnitProperty_StreamFormat,
227 kAudioUnitScope_Input, 0, &format,
228 sizeof(AudioStreamBasicDescription)))
231 ret = -E_ADD_CALLBACK;
232 if (AudioUnitSetProperty(powd->output, kAudioUnitProperty_SetRenderCallback,
233 kAudioUnitScope_Input, 0, &inputCallback,
234 sizeof(inputCallback)) < 0)
238 destroy_buffers(powd);
240 AudioUnitUninitialize(powd->output);
242 CloseComponent(powd->output);
247 __malloc void *osx_write_parse_config(char *options)
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");
262 static void osx_write_close(struct writer_node *wn)
264 struct private_osx_write_data *powd = wn->private_data;
266 PARA_INFO_LOG("closing writer node %p\n", wn);
267 AudioOutputUnitStop(powd->output);
268 AudioUnitUninitialize(powd->output);
269 CloseComponent(powd->output);
270 destroy_buffers(powd);
274 static int need_new_buffer(struct writer_node *wn)
276 struct writer_node_group *wng = wn->wng;
277 struct private_osx_write_data *powd = wn->private_data;
279 if (*wng->loaded < sizeof(short))
281 if (powd->to->remaining) /* Non empty buffer, must still be playing */
286 static int osx_write_post_select(__a_unused struct sched *s,
287 struct writer_node *wn)
289 struct private_osx_write_data *powd = wn->private_data;
290 struct writer_node_group *wng = wn->wng;
291 short *data = (short*)wng->buf;
293 if (!need_new_buffer(wn))
295 fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
296 powd->to = powd->to->next;
297 wn->written = *wng->loaded;
299 if (AudioOutputUnitStart(powd->output))
300 return -E_UNIT_START;
306 static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
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;
314 if (!numbytes && *wng->loaded >= sizeof(short))
315 goto min_delay; /* there's a buffer to fill */
318 divisor = powd->samplerate * powd->channels * 2 / numbytes;
320 tv_divide(divisor, &tmp, &delay);
321 if (tv_diff(&s->timeout, &delay, NULL) > 0)
323 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
324 // (long unsigned) s->timeout.tv_usec);
327 PARA_DEBUG_LOG("%s\n", "minimal delay");
328 s->timeout.tv_sec = 0;
329 s->timeout.tv_usec = 1;
333 void osx_write_init(struct writer *w)
335 w->open = osx_write_open;
336 w->close = osx_write_close;
337 w->pre_select = osx_write_pre_select;
338 w->post_select = osx_write_post_select;
339 w->parse_config = osx_write_parse_config;
340 w->shutdown = NULL; /* nothing to do */