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 /** 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 assert(b
->remaining
== 0 || size
> 0);
102 if (b
->size
!= size
) {
103 b
->buffer
= para_realloc(b
->buffer
, size
* sizeof(float));
108 *dest
++ = (*source
++) / 32768.0;
110 b
->remaining
= b
->size
;
113 static OSStatus
osx_callback(void * inClientData
,
114 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
115 __a_unused
const AudioTimeStamp
*inTimeStamp
,
116 __a_unused UInt32 inBusNumber
,
117 __a_unused UInt32 inNumFrames
,
118 AudioBufferList
*outOutputData
)
123 struct private_osx_write_data
*powd
= inClientData
;
125 // PARA_INFO_LOG("%p\n", powd);
126 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
127 /* what we have to fill */
128 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
129 dest
= outOutputData
->mBuffers
[i
].mData
;
131 n
= powd
->from
->remaining
;
133 n
= powd
->from
->next
->remaining
;
135 PARA_INFO_LOG("buffer underrun\n");
138 powd
->from
= powd
->from
->next
;
140 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
142 * we dump what we can. In fact, just the necessary
143 * should be sufficient
147 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
149 /* remember all done work */
151 powd
->from
->ptr
+= n
;
152 if ((powd
->from
->remaining
-= n
) <= 0)
153 powd
->from
= powd
->from
->next
;
159 #ifdef WORDS_BIGENDIAN /* ppc */
160 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
162 #define ENDIAN_FLAGS 0
165 static int osx_write_open(struct writer_node
*wn
)
167 struct private_osx_write_data
*powd
= para_calloc(
168 sizeof(struct private_osx_write_data
));
169 ComponentDescription desc
;
171 AURenderCallbackStruct inputCallback
= {osx_callback
, powd
};
172 AudioStreamBasicDescription format
;
174 struct btr_node
*btrn
= wn
->btrn
;
177 wn
->private_data
= powd
;
178 /* where did that default audio output go? */
179 desc
.componentType
= kAudioUnitType_Output
;
180 desc
.componentSubType
= kAudioUnitSubType_DefaultOutput
;
181 /* NOTE: and if default output isn't Apple? */
182 desc
.componentManufacturer
= kAudioUnitManufacturer_Apple
;
183 desc
.componentFlags
= 0;
184 desc
.componentFlagsMask
= 0;
185 ret
= -E_DEFAULT_COMP
;
186 comp
= FindNextComponent(NULL
, &desc
);
190 if (OpenAComponent(comp
, &powd
->audio_unit
))
193 if (AudioUnitInitialize(powd
->audio_unit
))
196 ret
= get_btr_sample_rate(btrn
, &val
);
199 powd
->sample_rate
= val
;
200 ret
= get_btr_channels(btrn
, &val
);
203 powd
->channels
= val
;
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
->sample_rate
;
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 void osx_write_post_select(__a_unused
struct sched
*s
, struct task
*t
)
281 struct writer_node
*wn
= container_of(t
, struct writer_node
, task
);
282 struct private_osx_write_data
*powd
= wn
->private_data
;
283 struct btr_node
*btrn
= wn
->btrn
;
288 while (powd
->to
->remaining
<= 0) {
289 ret
= btr_node_status(wn
->btrn
, wn
->min_iqs
, BTR_NT_LEAF
);
292 btr_merge(btrn
, 8192);
293 bytes
= btr_next_buffer(btrn
, &data
);
294 //PARA_CRIT_LOG("have: %zu\n", bytes);
295 fill_buffer(powd
->to
, (short *)data
, bytes
/ sizeof(short));
296 btr_consume(btrn
, bytes
);
299 if (AudioOutputUnitStart(powd
->audio_unit
))
303 powd
->to
= powd
->to
->next
;
306 btr_remove_node(btrn
);
310 static void osx_write_pre_select(struct sched
*s
, struct task
*t
)
312 struct writer_node
*wn
= container_of(t
, struct writer_node
, task
);
313 struct private_osx_write_data
*powd
= wn
->private_data
;
314 struct timeval tmp
= {.tv_sec
= 1, .tv_usec
= 0}, delay
= tmp
;
315 unsigned long divisor
;
316 size_t numbytes
= powd
->to
->remaining
* sizeof(short);
317 int ret
= btr_node_status(wn
->btrn
, wn
->min_iqs
, BTR_NT_LEAF
);
321 if (ret
<= 0 || numbytes
< wn
->min_iqs
)
323 divisor
= powd
->sample_rate
* wn
->min_iqs
/ numbytes
;
325 tv_divide(divisor
, &tmp
, &delay
);
326 sched_request_timeout(&delay
, s
);
329 /** the init function of the osx writer */
330 void osx_write_init(struct writer
*w
)
332 struct osx_write_args_info dummy
;
334 osx_cmdline_parser_init(&dummy
);
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
->free_config
= osx_free_config
;
341 w
->shutdown
= NULL
; /* nothing to do */
342 w
->help
= (struct ggo_help
) {
343 .short_help
= osx_write_args_info_help
,
344 .detailed_help
= osx_write_args_info_detailed_help
346 osx_cmdline_parser_free(&dummy
);