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>
43 float *ptr
; /* Where in the buffer are we? */
45 struct osx_buffer
*next
;
47 typedef struct osx_buffer osx_buffer
;
49 struct private_osx_write_data
{
54 osx_buffer
*from
; /* Current buffers */
62 * Tried with 3 buffers, but then any little window move is sufficient to
63 * stop the sound (OK, on a G3 400 with a Public Beta. Perhaps now we can
64 * go down to 2 buffers). With 16 buffers we have 1.5 seconds music
65 * buffered (or, if you're pessimistic, 1.5 seconds latency). Note 0
66 * buffers don't work much further than the Bus error.
68 #define NUMBER_BUFFERS 2
70 static void destroy_buffers(struct private_osx_write_data
*powd
)
75 powd
->to
->next
= NULL
;
84 static void init_buffers(struct private_osx_write_data
*powd
)
90 for (i
= 0; i
< NUMBER_BUFFERS
; i
++) {
91 *ptrptr
= malloc(sizeof(osx_buffer
));
93 (*ptrptr
)->remaining
= 0;
94 (*ptrptr
)->buffer
= NULL
;
95 ptrptr
= &(*ptrptr
)->next
;
96 /* This buffer is ready for filling (of course, it is empty!) */
98 *ptrptr
= powd
->from
= powd
->to
;
101 static void fill_buffer(osx_buffer
*b
, short *source
, long size
)
105 if (b
->remaining
) /* Non empty buffer, must still be playing */
107 PARA_INFO_LOG("%ld\n", size
);
108 if (b
->size
!= size
) {
110 * Hey! What's that? Coudn't this buffer size be fixed
111 * once (well, perhaps we just didn't allocate it yet)
115 b
->buffer
= malloc(size
* sizeof(float));
120 char *tmp
= (char *)source
;
124 /* *dest++ = ((*source++) + 32768) / 65536.0; */
125 *dest
++ = (*source
++) / 32768.0;
128 b
->remaining
= b
->size
;
131 static OSStatus
osx_callback(void * inClientData
,
132 __a_unused AudioUnitRenderActionFlags
*inActionFlags
,
133 __a_unused
const AudioTimeStamp
*inTimeStamp
,
134 __a_unused UInt32 inBusNumber
,
135 __a_unused UInt32 inNumFrames
,
136 AudioBufferList
*outOutputData
)
141 struct private_osx_write_data
*powd
= inClientData
;
143 // PARA_INFO_LOG("%p\n", powd);
144 for (i
= 0; i
< outOutputData
->mNumberBuffers
; ++i
) {
145 /* what we have to fill */
146 m
= outOutputData
->mBuffers
[i
].mDataByteSize
/ sizeof(float);
147 dest
= outOutputData
->mBuffers
[i
].mData
;
149 if ((n
= powd
->from
->remaining
) <= 0) {
150 PARA_INFO_LOG("%s", "buffer underrun\n");
151 /* no more bytes in the current read buffer! */
152 while ((n
= powd
->from
->remaining
) <= 0)
153 /* wait for the results */
156 PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd
->from
->buffer
, n
, m
);
158 * we dump what we can. In fact, just the necessary
159 * should be sufficient
163 memcpy(dest
, powd
->from
->ptr
, n
* sizeof(float));
165 /* remember all done work */
167 powd
->from
->ptr
+= n
;
168 if ((powd
->from
->remaining
-= n
) <= 0)
169 powd
->from
= powd
->from
->next
;
175 static int osx_write_open(struct writer_node
*wn
)
177 struct private_osx_write_data
*powd
= para_calloc(
178 sizeof(struct private_osx_write_data
));
179 ComponentDescription desc
;
181 AURenderCallbackStruct inputCallback
= {osx_callback
, powd
};
182 AudioStreamBasicDescription format
;
184 struct writer_node_group
*wng
= wn
->wng
;
185 struct osx_write_args_info
*conf
= wn
->conf
;
187 wn
->private_data
= powd
;
188 /* where did that default audio output go? */
189 desc
.componentType
= kAudioUnitType_Output
;
190 desc
.componentSubType
= kAudioUnitSubType_DefaultOutput
;
191 /* NOTE: and if default output isn't Apple? */
192 desc
.componentManufacturer
= kAudioUnitManufacturer_Apple
;
193 desc
.componentFlags
= 0;
194 desc
.componentFlagsMask
= 0;
195 ret
= -E_DEFAULT_COMP
;
196 comp
= FindNextComponent(NULL
, &desc
);
200 if (OpenAComponent(comp
, &powd
->output
))
203 if (AudioUnitInitialize(powd
->output
))
208 /* Hmmm, let's choose PCM format */
209 /* We tell the Output Unit what format we're going to supply data to it.
210 * This is necessary if you're providing data through an input callback
211 * AND you want the DefaultOutputUnit to do any format conversions
212 * necessary from your format to the device's format.
214 if (!conf
->samplerate_given
&& wng
->samplerate
)
215 powd
->samplerate
= *wng
->samplerate
;
217 powd
->samplerate
= conf
->samplerate_arg
;
218 format
.mSampleRate
= powd
->samplerate
;
219 /* The specific encoding type of audio stream*/
220 format
.mFormatID
= kAudioFormatLinearPCM
;
221 /* flags specific to each format */
222 format
.mFormatFlags
= kLinearPCMFormatFlagIsFloat
223 | kLinearPCMFormatFlagIsPacked
224 | kLinearPCMFormatFlagIsBigEndian
;
225 if (!conf
->channels_given
&& wng
->channels
)
226 powd
->channels
= *wng
->channels
;
228 powd
->channels
= conf
->channels_arg
;
229 format
.mChannelsPerFrame
= powd
->channels
;
230 format
.mFramesPerPacket
= 1;
231 format
.mBytesPerPacket
= format
.mChannelsPerFrame
* sizeof(float);
232 format
.mBytesPerFrame
= format
.mFramesPerPacket
* format
.mBytesPerPacket
;
233 /* one of the most constant constants of the whole computer history */
234 format
.mBitsPerChannel
= sizeof(float) * 8;
235 ret
= -E_STREAM_FORMAT
;
236 if (AudioUnitSetProperty(powd
->output
, kAudioUnitProperty_StreamFormat
,
237 kAudioUnitScope_Input
, 0, &format
,
238 sizeof(AudioStreamBasicDescription
)))
241 ret
= -E_ADD_CALLBACK
;
242 if (AudioUnitSetProperty(powd
->output
, kAudioUnitProperty_SetRenderCallback
,
243 kAudioUnitScope_Input
, 0, &inputCallback
,
244 sizeof(inputCallback
)) < 0)
248 destroy_buffers(powd
);
250 AudioUnitUninitialize(powd
->output
);
252 CloseComponent(powd
->output
);
257 __malloc
void *osx_write_parse_config(char *options
)
259 struct osx_write_args_info
*conf
260 = para_calloc(sizeof(struct osx_write_args_info
));
261 PARA_INFO_LOG("options: %s\n", options
);
262 int ret
= osx_cmdline_parser_string(options
, conf
, "osx_write");
272 static void osx_write_close(struct writer_node
*wn
)
274 struct private_osx_write_data
*powd
= wn
->private_data
;
276 PARA_INFO_LOG("closing writer node %p\n", wn
);
277 AudioOutputUnitStop(powd
->output
);
278 AudioUnitUninitialize(powd
->output
);
279 CloseComponent(powd
->output
);
280 destroy_buffers(powd
);
284 static int need_new_buffer(struct writer_node
*wn
)
286 struct writer_node_group
*wng
= wn
->wng
;
287 struct private_osx_write_data
*powd
= wn
->private_data
;
289 if (*wng
->loaded
< sizeof(short))
291 if (powd
->to
->remaining
) /* Non empty buffer, must still be playing */
296 static int osx_write_post_select(__a_unused
struct sched
*s
,
297 struct writer_node
*wn
)
299 struct private_osx_write_data
*powd
= wn
->private_data
;
300 struct writer_node_group
*wng
= wn
->wng
;
301 short *data
= (short*)wng
->buf
;
303 if (!need_new_buffer(wn
))
305 fill_buffer(powd
->to
, data
, *wng
->loaded
/ sizeof(short));
306 powd
->to
= powd
->to
->next
;
307 wn
->written
= *wng
->loaded
;
309 if (AudioOutputUnitStart(powd
->output
))
310 return -E_UNIT_START
;
316 static int osx_write_pre_select(struct sched
*s
, __a_unused
struct writer_node
*wn
)
318 s
->timeout
.tv_sec
= 0;
319 s
->timeout
.tv_usec
= 20;
323 void osx_write_init(struct writer
*w
)
325 w
->open
= osx_write_open
;
326 w
->close
= osx_write_close
;
327 w
->pre_select
= osx_write_pre_select
;
328 w
->post_select
= osx_write_post_select
;
329 w
->parse_config
= osx_write_parse_config
;
330 w
->shutdown
= NULL
; /* nothing to do */