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 struct private_osx_write_data
{
56 /** the main control structure for audio data manipulation */
58 /** non-zero if playback has started */
60 /** callback reads audio data from this buffer */
61 struct osx_buffer
*from
;
62 /* the post_select writes audio data here */
63 struct osx_buffer
*to
;
64 /** sample rate of the current audio stream */
66 /** number of channels of the current audio stream */
70 static void destroy_buffers(struct private_osx_write_data
*powd
)
72 struct osx_buffer
*ptr
;
73 struct osx_buffer
*ptr2
;
75 powd
->to
->next
= NULL
;
84 static void init_buffers(struct writer_node
*wn
)
86 struct private_osx_write_data
*powd
= wn
->private_data
;
87 struct osx_write_args_info
*conf
= wn
->conf
;
88 struct osx_buffer
**ptrptr
;
92 for (i
= 0; i
< conf
->numbuffers_arg
; i
++) {
93 *ptrptr
= malloc(sizeof(struct osx_buffer
));
95 (*ptrptr
)->remaining
= 0;
96 (*ptrptr
)->buffer
= NULL
;
97 ptrptr
= &(*ptrptr
)->next
;
99 *ptrptr
= powd
->from
= powd
->to
;
102 static void fill_buffer(struct osx_buffer
*b
, short *source
, long size
)
106 if (b
->remaining
) /* Non empty buffer, must still be playing */
108 if (b
->size
!= size
) {
109 b
->buffer
= para_realloc(b
->buffer
, size
* sizeof(float));
114 char *tmp
= (char *)source
;
118 /* *dest++ = ((*source++) + 32768) / 65536.0; */
119 *dest
++ = (*source
++) / 32768.0;
122 b
->remaining
= b
->size
;
125 static OSStatus
osx_callback(void * inClientData
,
126 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
127 __a_unused
const AudioTimeStamp
*inTimeStamp
,
128 __a_unused UInt32 inBusNumber
,
129 __a_unused UInt32 inNumFrames
,
130 AudioBufferList
*outOutputData
)
135 struct private_osx_write_data
*powd
= inClientData
;
137 // PARA_INFO_LOG("%p\n", powd);
138 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
139 /* what we have to fill */
140 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
141 dest
= outOutputData
->mBuffers
[i
].mData
;
143 if ((n
= powd
->from
->remaining
) <= 0) {
144 PARA_INFO_LOG("%s", "buffer underrun\n");
145 /* no more bytes in the current read buffer! */
146 while ((n
= powd
->from
->remaining
) <= 0)
147 /* wait for the results */
150 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
152 * we dump what we can. In fact, just the necessary
153 * should be sufficient
157 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
159 /* remember all done work */
161 powd
->from
->ptr
+= n
;
162 if ((powd
->from
->remaining
-= n
) <= 0)
163 powd
->from
= powd
->from
->next
;
169 static int osx_write_open(struct writer_node
*wn
)
171 struct private_osx_write_data
*powd
= para_calloc(
172 sizeof(struct private_osx_write_data
));
173 ComponentDescription desc
;
175 AURenderCallbackStruct inputCallback
= {osx_callback
, powd
};
176 AudioStreamBasicDescription format
;
178 struct writer_node_group
*wng
= wn
->wng
;
179 struct osx_write_args_info
*conf
= wn
->conf
;
181 wn
->private_data
= powd
;
182 /* where did that default audio output go? */
183 desc
.componentType
= kAudioUnitType_Output
;
184 desc
.componentSubType
= kAudioUnitSubType_DefaultOutput
;
185 /* NOTE: and if default output isn't Apple? */
186 desc
.componentManufacturer
= kAudioUnitManufacturer_Apple
;
187 desc
.componentFlags
= 0;
188 desc
.componentFlagsMask
= 0;
189 ret
= -E_DEFAULT_COMP
;
190 comp
= FindNextComponent(NULL
, &desc
);
194 if (OpenAComponent(comp
, &powd
->audio_unit
))
197 if (AudioUnitInitialize(powd
->audio_unit
))
200 /* Hmmm, let's choose PCM format */
201 /* We tell the Output Unit what format we're going to supply data to it.
202 * This is necessary if you're providing data through an input callback
203 * AND you want the DefaultOutputUnit to do any format conversions
204 * necessary from your format to the device's format.
206 if (!conf
->samplerate_given
&& wng
->samplerate
)
207 powd
->samplerate
= *wng
->samplerate
;
209 powd
->samplerate
= conf
->samplerate_arg
;
210 format
.mSampleRate
= powd
->samplerate
;
211 /* The specific encoding type of audio stream*/
212 format
.mFormatID
= kAudioFormatLinearPCM
;
213 /* flags specific to each format */
214 format
.mFormatFlags
= kLinearPCMFormatFlagIsFloat
215 | kLinearPCMFormatFlagIsPacked
216 | kLinearPCMFormatFlagIsBigEndian
;
217 if (!conf
->channels_given
&& wng
->channels
)
218 powd
->channels
= *wng
->channels
;
220 powd
->channels
= conf
->channels_arg
;
221 format
.mChannelsPerFrame
= powd
->channels
;
222 format
.mFramesPerPacket
= 1;
223 format
.mBytesPerPacket
= format
.mChannelsPerFrame
* sizeof(float);
224 format
.mBytesPerFrame
= format
.mFramesPerPacket
* format
.mBytesPerPacket
;
225 /* one of the most constant constants of the whole computer history */
226 format
.mBitsPerChannel
= sizeof(float) * 8;
227 ret
= -E_STREAM_FORMAT
;
228 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_StreamFormat
,
229 kAudioUnitScope_Input
, 0, &format
,
230 sizeof(AudioStreamBasicDescription
)))
233 ret
= -E_ADD_CALLBACK
;
234 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_SetRenderCallback
,
235 kAudioUnitScope_Input
, 0, &inputCallback
,
236 sizeof(inputCallback
)) < 0)
240 destroy_buffers(powd
);
242 AudioUnitUninitialize(powd
->audio_unit
);
244 CloseComponent(powd
->audio_unit
);
249 __malloc
void *osx_write_parse_config(char *options
)
251 struct osx_write_args_info
*conf
252 = para_calloc(sizeof(struct osx_write_args_info
));
253 PARA_INFO_LOG("options: %s\n", options
);
254 int ret
= osx_cmdline_parser_string(options
, conf
, "osx_write");
264 static void osx_write_close(struct writer_node
*wn
)
266 struct private_osx_write_data
*powd
= wn
->private_data
;
268 PARA_INFO_LOG("closing writer node %p\n", wn
);
269 AudioOutputUnitStop(powd
->audio_unit
);
270 AudioUnitUninitialize(powd
->audio_unit
);
271 CloseComponent(powd
->audio_unit
);
272 destroy_buffers(powd
);
276 static int need_new_buffer(struct writer_node
*wn
)
278 struct writer_node_group
*wng
= wn
->wng
;
279 struct private_osx_write_data
*powd
= wn
->private_data
;
281 if (*wng
->loaded
< sizeof(short))
283 if (powd
->to
->remaining
) /* Non empty buffer, must still be playing */
288 static int osx_write_post_select(__a_unused
struct sched
*s
,
289 struct writer_node
*wn
)
291 struct private_osx_write_data
*powd
= wn
->private_data
;
292 struct writer_node_group
*wng
= wn
->wng
;
293 short *data
= (short*)wng
->buf
;
295 if (!need_new_buffer(wn
))
297 fill_buffer(powd
->to
, data
, *wng
->loaded
/ sizeof(short));
298 powd
->to
= powd
->to
->next
;
299 wn
->written
= *wng
->loaded
;
301 if (AudioOutputUnitStart(powd
->audio_unit
))
302 return -E_UNIT_START
;
308 static int osx_write_pre_select(struct sched
*s
, __a_unused
struct writer_node
*wn
)
310 struct private_osx_write_data
*powd
= wn
->private_data
;
311 struct writer_node_group
*wng
= wn
->wng
;
312 size_t numbytes
= powd
->to
->remaining
* sizeof(short);
313 struct timeval tmp
= {.tv_sec
= 1, .tv_usec
= 0}, delay
= tmp
;
314 unsigned long divisor
;
316 if (!numbytes
&& *wng
->loaded
>= sizeof(short))
317 goto min_delay
; /* there's a buffer to fill */
320 divisor
= powd
->samplerate
* powd
->channels
* 2 / numbytes
;
322 tv_divide(divisor
, &tmp
, &delay
);
323 if (tv_diff(&s
->timeout
, &delay
, NULL
) > 0)
325 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
326 // (long unsigned) s->timeout.tv_usec);
329 PARA_DEBUG_LOG("%s\n", "minimal delay");
330 s
->timeout
.tv_sec
= 0;
331 s
->timeout
.tv_usec
= 1;
335 /** the init function of the osx writer */
336 void osx_write_init(struct writer
*w
)
338 w
->open
= osx_write_open
;
339 w
->close
= osx_write_close
;
340 w
->pre_select
= osx_write_pre_select
;
341 w
->post_select
= osx_write_post_select
;
342 w
->parse_config
= osx_write_parse_config
;
343 w
->shutdown
= NULL
; /* nothing to do */