2 * Copyright (C) 2006-2007 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 *dest
++ = (*source
++) / 32768.0;
117 b
->remaining
= b
->size
;
120 static OSStatus
osx_callback(void * inClientData
,
121 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
122 __a_unused
const AudioTimeStamp
*inTimeStamp
,
123 __a_unused UInt32 inBusNumber
,
124 __a_unused UInt32 inNumFrames
,
125 AudioBufferList
*outOutputData
)
130 struct private_osx_write_data
*powd
= inClientData
;
132 // PARA_INFO_LOG("%p\n", powd);
133 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
134 /* what we have to fill */
135 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
136 dest
= outOutputData
->mBuffers
[i
].mData
;
138 if ((n
= powd
->from
->remaining
) <= 0) {
139 PARA_INFO_LOG("%s", "buffer underrun\n");
142 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
144 * we dump what we can. In fact, just the necessary
145 * should be sufficient
149 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
151 /* remember all done work */
153 powd
->from
->ptr
+= n
;
154 if ((powd
->from
->remaining
-= n
) <= 0)
155 powd
->from
= powd
->from
->next
;
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 writer_node_group
*wng
= wn
->wng
;
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 /* Hmmm, let's choose PCM format */
193 /* We tell the Output Unit what format we're going to supply data to it.
194 * This is necessary if you're providing data through an input callback
195 * AND you want the DefaultOutputUnit to do any format conversions
196 * necessary from your format to the device's format.
198 if (!conf
->samplerate_given
&& wng
->samplerate
)
199 powd
->samplerate
= *wng
->samplerate
;
201 powd
->samplerate
= conf
->samplerate_arg
;
202 format
.mSampleRate
= powd
->samplerate
;
203 /* The specific encoding type of audio stream*/
204 format
.mFormatID
= kAudioFormatLinearPCM
;
205 /* flags specific to each format */
206 format
.mFormatFlags
= kLinearPCMFormatFlagIsFloat
207 | kLinearPCMFormatFlagIsPacked
208 | kLinearPCMFormatFlagIsBigEndian
;
209 if (!conf
->channels_given
&& wng
->channels
)
210 powd
->channels
= *wng
->channels
;
212 powd
->channels
= conf
->channels_arg
;
213 format
.mChannelsPerFrame
= powd
->channels
;
214 format
.mFramesPerPacket
= 1;
215 format
.mBytesPerPacket
= format
.mChannelsPerFrame
* sizeof(float);
216 format
.mBytesPerFrame
= format
.mFramesPerPacket
* format
.mBytesPerPacket
;
217 /* one of the most constant constants of the whole computer history */
218 format
.mBitsPerChannel
= sizeof(float) * 8;
219 ret
= -E_STREAM_FORMAT
;
220 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_StreamFormat
,
221 kAudioUnitScope_Input
, 0, &format
,
222 sizeof(AudioStreamBasicDescription
)))
225 ret
= -E_ADD_CALLBACK
;
226 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_SetRenderCallback
,
227 kAudioUnitScope_Input
, 0, &inputCallback
,
228 sizeof(inputCallback
)) < 0)
232 destroy_buffers(powd
);
234 AudioUnitUninitialize(powd
->audio_unit
);
236 CloseComponent(powd
->audio_unit
);
241 __malloc
static void *osx_write_parse_config(const char *options
)
243 struct osx_write_args_info
*conf
244 = para_calloc(sizeof(struct osx_write_args_info
));
245 PARA_INFO_LOG("options: %s\n", options
);
246 int ret
= osx_cmdline_parser_string(options
, conf
, "osx_write");
256 static void osx_write_close(struct writer_node
*wn
)
258 struct private_osx_write_data
*powd
= wn
->private_data
;
260 PARA_INFO_LOG("closing writer node %p\n", wn
);
261 AudioOutputUnitStop(powd
->audio_unit
);
262 AudioUnitUninitialize(powd
->audio_unit
);
263 CloseComponent(powd
->audio_unit
);
264 destroy_buffers(powd
);
268 static int need_new_buffer(struct writer_node
*wn
)
270 struct writer_node_group
*wng
= wn
->wng
;
271 struct private_osx_write_data
*powd
= wn
->private_data
;
273 if (*wng
->loaded
< sizeof(short))
275 if (powd
->to
->remaining
) /* Non empty buffer, must still be playing */
280 static int osx_write_post_select(__a_unused
struct sched
*s
,
281 struct writer_node
*wn
)
283 struct private_osx_write_data
*powd
= wn
->private_data
;
284 struct writer_node_group
*wng
= wn
->wng
;
285 short *data
= (short*)wng
->buf
;
287 if (!need_new_buffer(wn
))
289 fill_buffer(powd
->to
, data
, *wng
->loaded
/ sizeof(short));
290 powd
->to
= powd
->to
->next
;
291 wn
->written
= *wng
->loaded
;
293 if (AudioOutputUnitStart(powd
->audio_unit
))
294 return -E_UNIT_START
;
300 static int osx_write_pre_select(struct sched
*s
, __a_unused
struct writer_node
*wn
)
302 struct private_osx_write_data
*powd
= wn
->private_data
;
303 struct writer_node_group
*wng
= wn
->wng
;
304 size_t numbytes
= powd
->to
->remaining
* sizeof(short);
305 struct timeval tmp
= {.tv_sec
= 1, .tv_usec
= 0}, delay
= tmp
;
306 unsigned long divisor
;
308 if (!numbytes
&& *wng
->loaded
>= sizeof(short))
309 goto min_delay
; /* there's a buffer to fill */
312 divisor
= powd
->samplerate
* powd
->channels
* 2 / numbytes
;
314 tv_divide(divisor
, &tmp
, &delay
);
315 if (tv_diff(&s
->timeout
, &delay
, NULL
) > 0)
317 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
318 // (long unsigned) s->timeout.tv_usec);
321 PARA_DEBUG_LOG("%s\n", "minimal delay");
322 s
->timeout
.tv_sec
= 0;
323 s
->timeout
.tv_usec
= 1;
327 /** the init function of the osx writer */
328 void osx_write_init(struct writer
*w
)
330 w
->open
= osx_write_open
;
331 w
->close
= osx_write_close
;
332 w
->pre_select
= osx_write_pre_select
;
333 w
->post_select
= osx_write_post_select
;
334 w
->parse_config
= osx_write_parse_config
;
335 w
->shutdown
= NULL
; /* nothing to do */