2 * Copyright (C) 2006-2008 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>
14 #include <sys/types.h>
16 #include <CoreAudio/CoreAudio.h>
23 #include "osx_write.cmdline.h"
27 #include <CoreAudio/CoreAudio.h>
28 #include <AudioUnit/AudioUnit.h>
29 #include <AudioToolbox/DefaultAudioOutput.h>
31 /** describes one input buffer for the osx writer */
33 /** pointer to the beginning of the buffer */
35 /** the size of this buffer */
37 /** current position in the buffer */
39 /** number of floats not yet consuned */
41 /** pointer to the next audio buffer */
42 struct osx_buffer
*next
;
45 /** data specific to the osx writer */
46 struct private_osx_write_data
{
47 /** the main control structure for audio data manipulation */
49 /** non-zero if playback has started */
51 /** callback reads audio data from this buffer */
52 struct osx_buffer
*from
;
53 /** the post_select writes audio data here */
54 struct osx_buffer
*to
;
55 /** sample rate of the current audio stream */
57 /** number of channels of the current audio stream */
61 static void destroy_buffers(struct private_osx_write_data
*powd
)
63 struct osx_buffer
*ptr
;
64 struct osx_buffer
*ptr2
;
66 powd
->to
->next
= NULL
;
75 static void init_buffers(struct writer_node
*wn
)
77 struct private_osx_write_data
*powd
= wn
->private_data
;
78 struct osx_write_args_info
*conf
= wn
->conf
;
79 struct osx_buffer
**ptrptr
;
83 for (i
= 0; i
< conf
->numbuffers_arg
; i
++) {
84 *ptrptr
= malloc(sizeof(struct osx_buffer
));
86 (*ptrptr
)->remaining
= 0;
87 (*ptrptr
)->buffer
= NULL
;
88 ptrptr
= &(*ptrptr
)->next
;
90 *ptrptr
= powd
->from
= powd
->to
;
93 static void fill_buffer(struct osx_buffer
*b
, short *source
, long size
)
97 if (b
->remaining
) /* Non empty buffer, must still be playing */
99 if (b
->size
!= size
) {
100 b
->buffer
= para_realloc(b
->buffer
, size
* sizeof(float));
105 *dest
++ = (*source
++) / 32768.0;
107 b
->remaining
= b
->size
;
110 static OSStatus
osx_callback(void * inClientData
,
111 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
112 __a_unused
const AudioTimeStamp
*inTimeStamp
,
113 __a_unused UInt32 inBusNumber
,
114 __a_unused UInt32 inNumFrames
,
115 AudioBufferList
*outOutputData
)
120 struct private_osx_write_data
*powd
= inClientData
;
122 // PARA_INFO_LOG("%p\n", powd);
123 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
124 /* what we have to fill */
125 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
126 dest
= outOutputData
->mBuffers
[i
].mData
;
128 if ((n
= powd
->from
->remaining
) <= 0) {
129 PARA_INFO_LOG("buffer underrun\n");
132 // PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
134 * we dump what we can. In fact, just the necessary
135 * should be sufficient
139 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
141 /* remember all done work */
143 powd
->from
->ptr
+= n
;
144 if ((powd
->from
->remaining
-= n
) <= 0)
145 powd
->from
= powd
->from
->next
;
151 #ifdef WORDS_BIGENDIAN /* ppc */
152 #define ENDIAN_FLAGS kLinearPCMFormatFlagIsBigEndian
154 #define ENDIAN_FLAGS 0
157 static int osx_write_open(struct writer_node
*wn
)
159 struct private_osx_write_data
*powd
= para_calloc(
160 sizeof(struct private_osx_write_data
));
161 ComponentDescription desc
;
163 AURenderCallbackStruct inputCallback
= {osx_callback
, powd
};
164 AudioStreamBasicDescription format
;
166 struct writer_node_group
*wng
= wn
->wng
;
167 struct osx_write_args_info
*conf
= wn
->conf
;
169 wn
->private_data
= powd
;
170 /* where did that default audio output go? */
171 desc
.componentType
= kAudioUnitType_Output
;
172 desc
.componentSubType
= kAudioUnitSubType_DefaultOutput
;
173 /* NOTE: and if default output isn't Apple? */
174 desc
.componentManufacturer
= kAudioUnitManufacturer_Apple
;
175 desc
.componentFlags
= 0;
176 desc
.componentFlagsMask
= 0;
177 ret
= -E_DEFAULT_COMP
;
178 comp
= FindNextComponent(NULL
, &desc
);
182 if (OpenAComponent(comp
, &powd
->audio_unit
))
185 if (AudioUnitInitialize(powd
->audio_unit
))
188 /* Hmmm, let's choose PCM format */
189 /* We tell the Output Unit what format we're going to supply data to it.
190 * This is necessary if you're providing data through an input callback
191 * AND you want the DefaultOutputUnit to do any format conversions
192 * necessary from your format to the device's format.
194 if (!conf
->samplerate_given
&& wng
->samplerate
)
195 powd
->samplerate
= *wng
->samplerate
;
197 powd
->samplerate
= conf
->samplerate_arg
;
198 format
.mSampleRate
= powd
->samplerate
;
199 /* The specific encoding type of audio stream*/
200 format
.mFormatID
= kAudioFormatLinearPCM
;
201 /* flags specific to each format */
202 format
.mFormatFlags
= kLinearPCMFormatFlagIsFloat
203 | kLinearPCMFormatFlagIsPacked
205 if (!conf
->channels_given
&& wng
->channels
)
206 powd
->channels
= *wng
->channels
;
208 powd
->channels
= conf
->channels_arg
;
209 format
.mChannelsPerFrame
= powd
->channels
;
210 format
.mFramesPerPacket
= 1;
211 format
.mBytesPerPacket
= format
.mChannelsPerFrame
* sizeof(float);
212 format
.mBytesPerFrame
= format
.mFramesPerPacket
* format
.mBytesPerPacket
;
213 /* one of the most constant constants of the whole computer history */
214 format
.mBitsPerChannel
= sizeof(float) * 8;
215 ret
= -E_STREAM_FORMAT
;
216 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_StreamFormat
,
217 kAudioUnitScope_Input
, 0, &format
,
218 sizeof(AudioStreamBasicDescription
)))
221 ret
= -E_ADD_CALLBACK
;
222 if (AudioUnitSetProperty(powd
->audio_unit
, kAudioUnitProperty_SetRenderCallback
,
223 kAudioUnitScope_Input
, 0, &inputCallback
,
224 sizeof(inputCallback
)) < 0)
228 destroy_buffers(powd
);
230 AudioUnitUninitialize(powd
->audio_unit
);
232 CloseComponent(powd
->audio_unit
);
237 __malloc
static void *osx_write_parse_config(const char *options
)
239 struct osx_write_args_info
*conf
240 = para_calloc(sizeof(struct osx_write_args_info
));
241 PARA_INFO_LOG("options: %s\n", options
);
242 int ret
= osx_cmdline_parser_string(options
, conf
, "osx_write");
252 static void osx_write_close(struct writer_node
*wn
)
254 struct private_osx_write_data
*powd
= wn
->private_data
;
256 PARA_INFO_LOG("closing writer node %p\n", wn
);
257 AudioOutputUnitStop(powd
->audio_unit
);
258 AudioUnitUninitialize(powd
->audio_unit
);
259 CloseComponent(powd
->audio_unit
);
260 destroy_buffers(powd
);
264 static int need_new_buffer(struct writer_node
*wn
)
266 struct writer_node_group
*wng
= wn
->wng
;
267 struct private_osx_write_data
*powd
= wn
->private_data
;
269 if (*wng
->loaded
< sizeof(short))
271 if (powd
->to
->remaining
) /* Non empty buffer, must still be playing */
276 static int osx_write_post_select(__a_unused
struct sched
*s
,
277 struct writer_node
*wn
)
279 struct private_osx_write_data
*powd
= wn
->private_data
;
280 struct writer_node_group
*wng
= wn
->wng
;
281 short *data
= (short*)wng
->buf
;
283 if (!need_new_buffer(wn
))
285 fill_buffer(powd
->to
, data
, *wng
->loaded
/ sizeof(short));
286 powd
->to
= powd
->to
->next
;
287 wn
->written
= *wng
->loaded
;
289 if (AudioOutputUnitStart(powd
->audio_unit
))
290 return -E_UNIT_START
;
296 static int osx_write_pre_select(struct sched
*s
, __a_unused
struct writer_node
*wn
)
298 struct private_osx_write_data
*powd
= wn
->private_data
;
299 struct writer_node_group
*wng
= wn
->wng
;
300 size_t numbytes
= powd
->to
->remaining
* sizeof(short);
301 struct timeval tmp
= {.tv_sec
= 1, .tv_usec
= 0}, delay
= tmp
;
302 unsigned long divisor
;
304 if (!numbytes
&& *wng
->loaded
>= sizeof(short))
305 goto min_delay
; /* there's a buffer to fill */
308 divisor
= powd
->samplerate
* powd
->channels
* 2 / numbytes
;
310 tv_divide(divisor
, &tmp
, &delay
);
311 if (tv_diff(&s
->timeout
, &delay
, NULL
) > 0)
313 // PARA_DEBUG_LOG("delay: %lu:%lu\n", (long unsigned) s->timeout.tv_sec,
314 // (long unsigned) s->timeout.tv_usec);
317 PARA_DEBUG_LOG("%s\n", "minimal delay");
318 s
->timeout
.tv_sec
= 0;
319 s
->timeout
.tv_usec
= 1;
323 /** the init function of the osx writer */
324 void osx_write_init(struct writer
*w
)
326 w
->open
= osx_write_open
;
327 w
->close
= osx_write_close
;
328 w
->pre_select
= osx_write_pre_select
;
329 w
->post_select
= osx_write_post_select
;
330 w
->parse_config
= osx_write_parse_config
;
331 w
->shutdown
= NULL
; /* nothing to do */