2 * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file osx_write.c paraslash's output plugin for MacOs */
10 * based on mosx-mpg123, by Guillaume Outters and Steven A. Kortze
11 * <skortze@sourceforge.net>
15 #include <sys/types.h>
25 #include "buffer_tree.h"
27 #include "write_common.h"
28 #include "osx_write.cmdline.h"
31 #include <CoreServices/CoreServices.h>
32 #include <AudioUnit/AudioUnit.h>
33 #include <AudioToolbox/AudioToolbox.h>
35 /** describes one input buffer for the osx writer */
37 /** pointer to the beginning of the buffer */
39 /** the size of this buffer */
41 /** current position in the buffer */
43 /** number of floats not yet consuned */
45 /** pointer to the next audio buffer */
46 struct osx_buffer *next;
49 /** data specific to the osx writer */
50 struct private_osx_write_data {
51 /** the main control structure for audio data manipulation */
53 /** non-zero if playback has started */
55 /** callback reads audio data from this buffer */
56 struct osx_buffer *from;
57 /** the post_select writes audio data here */
58 struct osx_buffer *to;
59 /** sample rate of the current audio stream */
61 /** number of channels of the current audio stream */
65 static void destroy_buffers(struct private_osx_write_data *powd)
67 struct osx_buffer *ptr;
68 struct osx_buffer *ptr2;
70 powd->to->next = NULL;
79 static void init_buffers(struct writer_node *wn)
81 struct private_osx_write_data *powd = wn->private_data;
82 struct osx_write_args_info *conf = wn->conf;
83 struct osx_buffer **ptrptr;
87 for (i = 0; i < conf->numbuffers_arg; i++) {
88 *ptrptr = para_malloc(sizeof(struct osx_buffer));
90 (*ptrptr)->remaining = 0;
91 (*ptrptr)->buffer = NULL;
92 ptrptr = &(*ptrptr)->next;
94 *ptrptr = powd->from = powd->to;
97 static void fill_buffer(struct osx_buffer *b, short *source, long size)
101 if (b->remaining) /* Non empty buffer, must still be playing */
103 if (b->size != size) {
104 b->buffer = para_realloc(b->buffer, size * sizeof(float));
109 *dest++ = (*source++) / 32768.0;
111 b->remaining = b->size;
114 static OSStatus osx_callback(void * inClientData,
115 __a_unused AudioUnitRenderActionFlags *inActionFlags,
116 __a_unused const AudioTimeStamp *inTimeStamp,
117 __a_unused UInt32 inBusNumber,
118 __a_unused UInt32 inNumFrames,
119 AudioBufferList *outOutputData)
124 struct private_osx_write_data *powd = inClientData;
126 // PARA_INFO_LOG("%p\n", powd);
127 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
128 /* what we have to fill */
129 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
130 dest = outOutputData->mBuffers[i].mData;
132 if ((n = powd->from->remaining) <= 0) {
133 PARA_INFO_LOG("buffer underrun\n");
136 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
138 * we dump what we can. In fact, just the necessary
139 * should be sufficient
143 memcpy(dest, powd->from->ptr, n * sizeof(float));
145 /* remember all done work */
147 powd->from->ptr += n;
148 if ((powd->from->remaining -= n) <= 0)
149 powd->from = powd->from->next;
155 #ifdef WORDS_BIGENDIAN /* ppc */
156 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
158 #define ENDIAN_FLAGS 0
161 static int osx_write_open(struct writer_node *wn)
163 struct private_osx_write_data *powd = para_calloc(
164 sizeof(struct private_osx_write_data));
165 ComponentDescription desc;
167 AURenderCallbackStruct inputCallback = {osx_callback, powd};
168 AudioStreamBasicDescription format;
170 struct btr_node *btrn = wn->btrn;
171 struct osx_write_args_info *conf = wn->conf;
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);
186 if (OpenAComponent(comp, &powd->audio_unit))
189 if (AudioUnitInitialize(powd->audio_unit))
192 powd->samplerate = conf->samplerate_arg;
193 powd->channels = conf->channels_arg;
194 if (!conf->samplerate_given) {
196 if (get_btr_samplerate(btrn, &rate) >= 0)
197 powd->samplerate = rate;
199 if (!conf->channels_given) {
201 if (get_btr_channels(btrn, &ch) >= 0)
205 * Choose PCM format. We tell the Output Unit what format we're going
206 * to supply data to it. This is necessary if you're providing data
207 * through an input callback AND you want the DefaultOutputUnit to do
208 * any format conversions necessary from your format to the device's
211 format.mSampleRate = powd->samplerate;
212 /* The specific encoding type of audio stream */
213 format.mFormatID = kAudioFormatLinearPCM;
214 /* flags specific to each format */
215 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
216 | kLinearPCMFormatFlagIsPacked
218 format.mChannelsPerFrame = powd->channels;
219 format.mFramesPerPacket = 1;
220 format.mBytesPerPacket = format.mChannelsPerFrame * sizeof(float);
221 format.mBytesPerFrame = format.mFramesPerPacket * format.mBytesPerPacket;
222 /* one of the most constant constants of the whole computer history */
223 format.mBitsPerChannel = sizeof(float) * 8;
224 ret = -E_STREAM_FORMAT;
225 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
226 kAudioUnitScope_Input, 0, &format,
227 sizeof(AudioStreamBasicDescription)))
230 ret = -E_ADD_CALLBACK;
231 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
232 kAudioUnitScope_Input, 0, &inputCallback,
233 sizeof(inputCallback)) < 0)
235 wn->min_iqs = powd->channels * 2;
238 destroy_buffers(powd);
240 AudioUnitUninitialize(powd->audio_unit);
242 CloseComponent(powd->audio_unit);
247 __malloc static void *osx_write_parse_config(const 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_free_config(void *conf)
264 osx_cmdline_parser_free(conf);
267 static void osx_write_close(struct writer_node *wn)
269 struct private_osx_write_data *powd = wn->private_data;
271 PARA_INFO_LOG("closing writer node %p\n", wn);
272 AudioOutputUnitStop(powd->audio_unit);
273 AudioUnitUninitialize(powd->audio_unit);
274 CloseComponent(powd->audio_unit);
275 destroy_buffers(powd);
279 static int need_new_buffer(struct writer_node *wn)
281 struct private_osx_write_data *powd = wn->private_data;
283 if (wn->min_iqs > btr_get_input_queue_size(wn->btrn))
285 if (powd->to->remaining) /* Non empty buffer, must still be playing */
290 static void osx_write_post_select(__a_unused struct sched *s, struct task *t)
292 struct writer_node *wn = container_of(t, struct writer_node, task);
293 struct private_osx_write_data *powd = wn->private_data;
294 struct btr_node *btrn = wn->btrn;
297 int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
301 if (!need_new_buffer(wn))
303 btr_merge(btrn, wn->min_iqs);
304 bytes = btr_next_buffer(btrn, &data);
305 fill_buffer(powd->to, (short *)data, bytes / sizeof(short));
306 btr_consume(btrn, bytes);
307 powd->to = powd->to->next;
310 if (AudioOutputUnitStart(powd->audio_unit))
317 btr_remove_node(btrn);
321 static void osx_write_pre_select(struct sched *s, struct task *t)
323 struct writer_node *wn = container_of(t, struct writer_node, task);
324 struct private_osx_write_data *powd = wn->private_data;
325 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
326 unsigned long divisor;
327 size_t numbytes = powd->to->remaining * sizeof(short);
328 int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
332 if (ret <= 0 || numbytes < wn->min_iqs)
334 divisor = powd->samplerate * wn->min_iqs / numbytes;
336 tv_divide(divisor, &tmp, &delay);
337 sched_request_timeout(&delay, s);
340 /** the init function of the osx writer */
341 void osx_write_init(struct writer *w)
343 struct osx_write_args_info dummy;
345 osx_cmdline_parser_init(&dummy);
346 w->open = osx_write_open;
347 w->close = osx_write_close;
348 w->pre_select = osx_write_pre_select;
349 w->post_select = osx_write_post_select;
350 w->parse_config = osx_write_parse_config;
351 w->free_config = osx_free_config;
352 w->shutdown = NULL; /* nothing to do */
353 w->help = (struct ggo_help) {
354 .short_help = osx_write_args_info_help,
355 .detailed_help = osx_write_args_info_detailed_help
357 osx_cmdline_parser_free(&dummy);