2 * Copyright (C) 2006-2010 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 /** Sample format of the current audio stream */
62 unsigned sample_format;
63 /** number of channels of the current audio stream */
67 static void destroy_buffers(struct private_osx_write_data *powd)
69 struct osx_buffer *ptr;
70 struct osx_buffer *ptr2;
72 powd->to->next = NULL;
81 static void init_buffers(struct writer_node *wn)
83 struct private_osx_write_data *powd = wn->private_data;
84 struct osx_write_args_info *conf = wn->conf;
85 struct osx_buffer **ptrptr;
89 for (i = 0; i < conf->numbuffers_arg; i++) {
90 *ptrptr = para_malloc(sizeof(struct 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(struct private_osx_write_data *powd, char *data, long bytes)
101 struct osx_buffer *b = powd->to;
104 enum sample_format sf = powd->sample_format;
106 samples = (sf == SF_S8 || sf == SF_U8)? bytes : bytes / 2;
107 assert(b->remaining == 0 || samples > 0);
108 if (b->size != samples) {
109 b->buffer = para_realloc(b->buffer, samples * sizeof(float));
113 switch (powd->sample_format) {
115 uint8_t *src = (uint8_t *)data;
117 *dest++ = (*src++) / 256.0;
122 int8_t *src = (int8_t *)data;
124 *dest++ = ((*src++) + 128) / 256.0;
129 short *src = (short *)data;
131 *dest++ = (*src++) / 32768.0;
135 b->remaining = b->size;
138 static OSStatus osx_callback(void * inClientData,
139 __a_unused AudioUnitRenderActionFlags *inActionFlags,
140 __a_unused const AudioTimeStamp *inTimeStamp,
141 __a_unused UInt32 inBusNumber,
142 __a_unused UInt32 inNumFrames,
143 AudioBufferList *outOutputData)
148 struct private_osx_write_data *powd = inClientData;
150 // PARA_INFO_LOG("%p\n", powd);
151 for (i = 0; i < outOutputData->mNumberBuffers; ++i) {
152 /* what we have to fill */
153 m = outOutputData->mBuffers[i].mDataByteSize / sizeof(float);
154 dest = outOutputData->mBuffers[i].mData;
156 n = powd->from->remaining;
158 n = powd->from->next->remaining;
160 PARA_INFO_LOG("buffer underrun\n");
163 powd->from = powd->from->next;
165 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
167 * we dump what we can. In fact, just the necessary
168 * should be sufficient
172 memcpy(dest, powd->from->ptr, n * sizeof(float));
174 /* remember all done work */
176 powd->from->ptr += n;
177 if ((powd->from->remaining -= n) <= 0)
178 powd->from = powd->from->next;
184 #ifdef WORDS_BIGENDIAN /* ppc */
185 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
187 #define ENDIAN_FLAGS 0
190 static void osx_write_open(struct writer_node *wn)
192 struct private_osx_write_data *powd = para_calloc(sizeof(*powd));
194 wn->private_data = powd;
198 static int core_audio_init(struct writer_node *wn)
200 struct private_osx_write_data *powd = wn->private_data;
201 ComponentDescription desc;
203 AURenderCallbackStruct inputCallback = {osx_callback, powd};
204 AudioStreamBasicDescription format;
206 struct btr_node *btrn = wn->btrn;
209 /* where did that default audio output go? */
210 desc.componentType = kAudioUnitType_Output;
211 desc.componentSubType = kAudioUnitSubType_DefaultOutput;
212 /* NOTE: and if default output isn't Apple? */
213 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
214 desc.componentFlags = 0;
215 desc.componentFlagsMask = 0;
216 ret = -E_DEFAULT_COMP;
217 comp = FindNextComponent(NULL, &desc);
221 if (OpenAComponent(comp, &powd->audio_unit))
224 if (AudioUnitInitialize(powd->audio_unit))
227 get_btr_sample_rate(btrn, &val);
228 powd->sample_rate = val;
229 get_btr_channels(btrn, &val);
230 powd->channels = val;
231 get_btr_sample_format(btrn, &val);
232 powd->sample_format = val;
234 * Choose PCM format. We tell the Output Unit what format we're going
235 * to supply data to it. This is necessary if you're providing data
236 * through an input callback AND you want the DefaultOutputUnit to do
237 * any format conversions necessary from your format to the device's
240 format.mFormatID = kAudioFormatLinearPCM;
241 format.mFramesPerPacket = 1;
242 format.mSampleRate = powd->sample_rate;
243 /* flags specific to each format */
244 format.mFormatFlags = kLinearPCMFormatFlagIsFloat
245 | kLinearPCMFormatFlagIsPacked
247 switch (powd->sample_format) {
250 wn->min_iqs = powd->channels;
253 wn->min_iqs = powd->channels * 2;
255 format.mBitsPerChannel = 8 * sizeof(float);
256 format.mBytesPerPacket = powd->channels * sizeof(float);
257 format.mBytesPerFrame = format.mBytesPerPacket;
258 format.mChannelsPerFrame = powd->channels;
260 ret = -E_STREAM_FORMAT;
261 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_StreamFormat,
262 kAudioUnitScope_Input, 0, &format,
263 sizeof(AudioStreamBasicDescription)))
265 ret = -E_ADD_CALLBACK;
266 if (AudioUnitSetProperty(powd->audio_unit, kAudioUnitProperty_SetRenderCallback,
267 kAudioUnitScope_Input, 0, &inputCallback,
268 sizeof(inputCallback)) < 0)
272 destroy_buffers(powd);
274 AudioUnitUninitialize(powd->audio_unit);
276 CloseComponent(powd->audio_unit);
281 __malloc static void *osx_write_parse_config_or_die(const char *options)
283 struct osx_write_args_info *conf = para_calloc(sizeof(*conf));
285 /* exits on errors */
286 osx_cmdline_parser_string(options, conf, "osx_write");
290 static void osx_free_config(void *conf)
292 osx_cmdline_parser_free(conf);
295 static void osx_write_close(struct writer_node *wn)
297 struct private_osx_write_data *powd = wn->private_data;
299 PARA_INFO_LOG("closing writer node %p\n", wn);
300 AudioOutputUnitStop(powd->audio_unit);
301 AudioUnitUninitialize(powd->audio_unit);
302 CloseComponent(powd->audio_unit);
303 destroy_buffers(powd);
307 static void osx_write_post_select(__a_unused struct sched *s, struct task *t)
309 struct writer_node *wn = container_of(t, struct writer_node, task);
310 struct private_osx_write_data *powd = wn->private_data;
311 struct btr_node *btrn = wn->btrn;
316 while (powd->to->remaining <= 0) {
317 ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
320 if (powd->sample_rate == 0) {
321 ret = core_audio_init(wn);
325 btr_merge(btrn, 8192);
326 bytes = btr_next_buffer(btrn, &data);
327 //PARA_CRIT_LOG("have: %zu\n", bytes);
328 fill_buffer(powd, data, bytes);
329 btr_consume(btrn, bytes);
332 if (AudioOutputUnitStart(powd->audio_unit))
336 powd->to = powd->to->next;
338 if (ret < 0 && powd->from->remaining <= 0) {
339 btr_remove_node(btrn);
344 static void osx_write_pre_select(struct sched *s, struct task *t)
346 struct writer_node *wn = container_of(t, struct writer_node, task);
347 struct private_osx_write_data *powd = wn->private_data;
348 struct timeval tmp = {.tv_sec = 1, .tv_usec = 0}, delay = tmp;
349 unsigned long divisor;
351 int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
355 if (ret < 0 || !powd->audio_unit)
356 return sched_min_delay(s);
357 numbytes = powd->to->remaining * sizeof(short);
358 assert(numbytes > 0);
359 divisor = powd->sample_rate * wn->min_iqs / numbytes;
361 tv_divide(divisor, &tmp, &delay);
362 sched_request_timeout(&delay, s);
365 /** the init function of the osx writer */
366 void osx_write_init(struct writer *w)
368 struct osx_write_args_info dummy;
370 osx_cmdline_parser_init(&dummy);
371 w->open = osx_write_open;
372 w->close = osx_write_close;
373 w->pre_select = osx_write_pre_select;
374 w->post_select = osx_write_post_select;
375 w->parse_config_or_die = osx_write_parse_config_or_die;
376 w->free_config = osx_free_config;
377 w->shutdown = NULL; /* nothing to do */
378 w->help = (struct ggo_help) {
379 .short_help = osx_write_args_info_help,
380 .detailed_help = osx_write_args_info_detailed_help
382 osx_cmdline_parser_free(&dummy);