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 /** data specific to the osx writer */
56 struct private_osx_write_data
{
57 /** the main control structure for audio data manipulation */
59 /** non-zero if playback has started */
61 /** callback reads audio data from this buffer */
62 struct osx_buffer
*from
;
63 /* the post_select writes audio data here */
64 struct osx_buffer
*to
;
65 /** sample rate of the current audio stream */
67 /** number of channels of the current audio stream */
71 static void destroy_buffers(struct private_osx_write_data
*powd
)
73 struct osx_buffer
*ptr
;
74 struct osx_buffer
*ptr2
;
76 powd
->to
->next
= NULL
;
85 static void init_buffers(struct writer_node
*wn
)
87 struct private_osx_write_data
*powd
= wn
->private_data
;
88 struct osx_write_args_info
*conf
= wn
->conf
;
89 struct osx_buffer
**ptrptr
;
93 for (i
= 0; i
< conf
->numbuffers_arg
; i
++) {
94 *ptrptr
= malloc(sizeof(struct osx_buffer
));
96 (*ptrptr
)->remaining
= 0;
97 (*ptrptr
)->buffer
= NULL
;
98 ptrptr
= &(*ptrptr
)->next
;
100 *ptrptr
= powd
->from
= powd
->to
;
103 static void fill_buffer(struct osx_buffer
*b
, short *source
, long size
)
107 if (b
->remaining
) /* Non empty buffer, must still be playing */
109 if (b
->size
!= size
) {
110 b
->buffer
= para_realloc(b
->buffer
, size
* sizeof(float));
115 char *tmp
= (char *)source
;
119 /* *dest++ = ((*source++) + 32768) / 65536.0; */
120 *dest
++ = (*source
++) / 32768.0;
123 b
->remaining
= b
->size
;
126 static OSStatus
osx_callback(void * inClientData
,
127 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
128 __a_unused
const AudioTimeStamp
*inTimeStamp
,
129 __a_unused UInt32 inBusNumber
,
130 __a_unused UInt32 inNumFrames
,
131 AudioBufferList
*outOutputData
)
136 struct private_osx_write_data
*powd
= inClientData
;
138 // PARA_INFO_LOG("%p\n", powd);
139 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
140 /* what we have to fill */
141 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
142 dest
= outOutputData
->mBuffers
[i
].mData
;
144 if ((n
= powd
->from
->remaining
) <= 0) {
145 PARA_INFO_LOG("%s", "buffer underrun\n");
146 /* no more bytes in the current read buffer! */
147 while ((n
= powd
->from
->remaining
) <= 0)
148 /* wait for the results */
151 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
153 * we dump what we can. In fact, just the necessary
154 * should be sufficient
158 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
160 /* remember all done work */
162 powd
->from
->ptr
+= n
;
163 if ((powd
->from
->remaining
-= n
) <= 0)
164 powd
->from
= powd
->from
->next
;
170 static int osx_write_open(struct writer_node
*wn
)
172 struct private_osx_write_data
*powd
= para_calloc(
173 sizeof(struct private_osx_write_data
));
174 ComponentDescription desc
;
176 AURenderCallbackStruct inputCallback
= {osx_callback
, powd
};
177 AudioStreamBasicDescription format
;
179 struct writer_node_group
*wng
= wn
->wng
;
180 struct osx_write_args_info
*conf
= wn
->conf
;
182 wn
->private_data
= powd
;
183 /* where did that default audio output go? */
184 desc
.componentType
= kAudioUnitType_Output
;
185 desc
.componentSubType
= kAudioUnitSubType_DefaultOutput
;
186 /* NOTE: and if default output isn't Apple? */
187 desc
.componentManufacturer
= kAudioUnitManufacturer_Apple
;
188 desc
.componentFlags
= 0;
189 desc
.componentFlagsMask
= 0;
190 ret
= -E_DEFAULT_COMP
;
191 comp
= FindNextComponent(NULL
, &desc
);
195 if (OpenAComponent(comp
, &powd
->audio_unit
))
198 if (AudioUnitInitialize(powd
->audio_unit
))
201 /* Hmmm, let's choose PCM format */
202 /* We tell the Output Unit what format we're going to supply data to it.
203 * This is necessary if you're providing data through an input callback
204 * AND you want the DefaultOutputUnit to do any format conversions
205 * necessary from your format to the device's format.
207 if (!conf
->samplerate_given
&& wng
->samplerate
)
208 powd
->samplerate
= *wng
->samplerate
;
210 powd
->samplerate
= conf
->samplerate_arg
;
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
217 | kLinearPCMFormatFlagIsBigEndian
;
218 if (!conf
->channels_given
&& wng
->channels
)
219 powd
->channels
= *wng
->channels
;
221 powd
->channels
= conf
->channels_arg
;
222 format
.mChannelsPerFrame
= powd
->channels
;
223 format
.mFramesPerPacket
= 1;
224 format
.mBytesPerPacket
= format
.mChannelsPerFrame
* sizeof(float);
225 format
.mBytesPerFrame
= format
.mFramesPerPacket
* format
.mBytesPerPacket
;
226 /* one of the most constant constants of the whole computer history */
227 format
.mBitsPerChannel
= sizeof(float) * 8;
228 ret
= -E_STREAM_FORMAT
;
229 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_StreamFormat
,
230 kAudioUnitScope_Input
, 0, &format
,
231 sizeof(AudioStreamBasicDescription
)))
234 ret
= -E_ADD_CALLBACK
;
235 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_SetRenderCallback
,
236 kAudioUnitScope_Input
, 0, &inputCallback
,
237 sizeof(inputCallback
)) < 0)
241 destroy_buffers(powd
);
243 AudioUnitUninitialize(powd
->audio_unit
);
245 CloseComponent(powd
->audio_unit
);
250 __malloc
void *osx_write_parse_config(char *options
)
252 struct osx_write_args_info
*conf
253 = para_calloc(sizeof(struct osx_write_args_info
));
254 PARA_INFO_LOG("options: %s\n", options
);
255 int ret
= osx_cmdline_parser_string(options
, conf
, "osx_write");
265 static void osx_write_close(struct writer_node
*wn
)
267 struct private_osx_write_data
*powd
= wn
->private_data
;
269 PARA_INFO_LOG("closing writer node %p\n", wn
);
270 AudioOutputUnitStop(powd
->audio_unit
);
271 AudioUnitUninitialize(powd
->audio_unit
);
272 CloseComponent(powd
->audio_unit
);
273 destroy_buffers(powd
);
277 static int need_new_buffer(struct writer_node
*wn
)
279 struct writer_node_group
*wng
= wn
->wng
;
280 struct private_osx_write_data
*powd
= wn
->private_data
;
282 if (*wng
->loaded
< sizeof(short))
284 if (powd
->to
->remaining
) /* Non empty buffer, must still be playing */
289 static int osx_write_post_select(__a_unused
struct sched
*s
,
290 struct writer_node
*wn
)
292 struct private_osx_write_data
*powd
= wn
->private_data
;
293 struct writer_node_group
*wng
= wn
->wng
;
294 short *data
= (short*)wng
->buf
;
296 if (!need_new_buffer(wn
))
298 fill_buffer(powd
->to
, data
, *wng
->loaded
/ sizeof(short));
299 powd
->to
= powd
->to
->next
;
300 wn
->written
= *wng
->loaded
;
302 if (AudioOutputUnitStart(powd
->audio_unit
))
303 return -E_UNIT_START
;
309 static int osx_write_pre_select(struct sched
*s
, __a_unused
struct writer_node
*wn
)
311 struct private_osx_write_data
*powd
= wn
->private_data
;
312 struct writer_node_group
*wng
= wn
->wng
;
313 size_t numbytes
= powd
->to
->remaining
* sizeof(short);
314 struct timeval tmp
= {.tv_sec
= 1, .tv_usec
= 0}, delay
= tmp
;
315 unsigned long divisor
;
317 if (!numbytes
&& *wng
->loaded
>= sizeof(short))
318 goto min_delay
; /* there's a buffer to fill */
321 divisor
= powd
->samplerate
* powd
->channels
* 2 / numbytes
;
323 tv_divide(divisor
, &tmp
, &delay
);
324 if (tv_diff(&s
->timeout
, &delay
, NULL
) > 0)
326 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
327 // (long unsigned) s->timeout.tv_usec);
330 PARA_DEBUG_LOG("%s\n", "minimal delay");
331 s
->timeout
.tv_sec
= 0;
332 s
->timeout
.tv_usec
= 1;
336 /** the init function of the osx writer */
337 void osx_write_init(struct writer
*w
)
339 w
->open
= osx_write_open
;
340 w
->close
= osx_write_close
;
341 w
->pre_select
= osx_write_pre_select
;
342 w
->post_select
= osx_write_post_select
;
343 w
->parse_config
= osx_write_parse_config
;
344 w
->shutdown
= NULL
; /* nothing to do */