2 * This file is part of DisOrder.
3 * Copyright (C) 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 /** @file clients/playrtp-coreaudio.c
21 * @brief RTP player - Core Audio support
26 #if HAVE_COREAUDIO_AUDIOHARDWARE_H
28 #include <CoreAudio/AudioHardware.h>
36 /** @brief Callback from Core Audio */
37 static OSStatus adioproc
38 (AudioDeviceID
attribute((unused
)) inDevice
,
39 const AudioTimeStamp
attribute((unused
)) *inNow
,
40 const AudioBufferList
attribute((unused
)) *inInputData
,
41 const AudioTimeStamp
attribute((unused
)) *inInputTime
,
42 AudioBufferList
*outOutputData
,
43 const AudioTimeStamp
attribute((unused
)) *inOutputTime
,
44 void attribute((unused
)) *inClientData
) {
45 UInt32 nbuffers
= outOutputData
->mNumberBuffers
;
46 AudioBuffer
*ab
= outOutputData
->mBuffers
;
47 uint32_t samples_available
;
49 pthread_mutex_lock(&lock
);
51 float *samplesOut
= ab
->mData
;
52 size_t samplesOutLeft
= ab
->mDataByteSize
/ sizeof (float);
54 while(samplesOutLeft
> 0) {
55 const struct packet
*p
= playrtp_next_packet();
56 if(p
&& contains(p
, next_timestamp
)) {
57 /* This packet is ready to play */
58 const uint32_t packet_end
= p
->timestamp
+ p
->nsamples
;
59 const uint32_t offset
= next_timestamp
- p
->timestamp
;
60 const uint16_t *ptr
= (void *)(p
->samples_raw
+ offset
);
62 samples_available
= packet_end
- next_timestamp
;
63 if(samples_available
> samplesOutLeft
)
64 samples_available
= samplesOutLeft
;
65 next_timestamp
+= samples_available
;
66 samplesOutLeft
-= samples_available
;
70 for(n
= 0; n
< samples_available
; ++n
) {
71 dump_buffer
[dump_index
++] = (int16_t)ntohs(ptr
[n
]);
72 dump_index
%= dump_size
;
75 while(samples_available
-- > 0)
76 *samplesOut
++ = (int16_t)ntohs(*ptr
++) * (0.5 / 32767);
77 /* We don't bother junking the packet - that'll be dealt with next time
80 /* No packet is ready to play (and there might be no packet at all) */
81 samples_available
= p ? p
->timestamp
- next_timestamp
83 if(samples_available
> samplesOutLeft
)
84 samples_available
= samplesOutLeft
;
85 //info("infill by %"PRIu32, samples_available);
86 /* Conveniently the buffer is 0 to start with */
87 next_timestamp
+= samples_available
;
88 samplesOut
+= samples_available
;
89 samplesOutLeft
-= samples_available
;
93 for(n
= 0; n
< samples_available
; ++n
) {
94 dump_buffer
[dump_index
++] = 0;
95 dump_index
%= dump_size
;
103 pthread_mutex_unlock(&lock
);
107 void playrtp_coreaudio(void) {
111 AudioStreamBasicDescription asbd
;
113 /* If this looks suspiciously like libao's macosx driver there's an
114 * excellent reason for that... */
116 /* TODO report errors as strings not numbers */
117 propertySize
= sizeof adid
;
118 status
= AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice
,
119 &propertySize
, &adid
);
121 fatal(0, "AudioHardwareGetProperty: %d", (int)status
);
122 if(adid
== kAudioDeviceUnknown
)
123 fatal(0, "no output device");
124 propertySize
= sizeof asbd
;
125 status
= AudioDeviceGetProperty(adid
, 0, false,
126 kAudioDevicePropertyStreamFormat
,
127 &propertySize
, &asbd
);
129 fatal(0, "AudioHardwareGetProperty: %d", (int)status
);
130 D(("mSampleRate %f", asbd
.mSampleRate
));
131 D(("mFormatID %08lx", asbd
.mFormatID
));
132 D(("mFormatFlags %08lx", asbd
.mFormatFlags
));
133 D(("mBytesPerPacket %08lx", asbd
.mBytesPerPacket
));
134 D(("mFramesPerPacket %08lx", asbd
.mFramesPerPacket
));
135 D(("mBytesPerFrame %08lx", asbd
.mBytesPerFrame
));
136 D(("mChannelsPerFrame %08lx", asbd
.mChannelsPerFrame
));
137 D(("mBitsPerChannel %08lx", asbd
.mBitsPerChannel
));
138 D(("mReserved %08lx", asbd
.mReserved
));
139 if(asbd
.mFormatID
!= kAudioFormatLinearPCM
)
140 fatal(0, "audio device does not support kAudioFormatLinearPCM");
141 status
= AudioDeviceAddIOProc(adid
, adioproc
, 0);
143 fatal(0, "AudioDeviceAddIOProc: %d", (int)status
);
144 pthread_mutex_lock(&lock
);
146 /* Wait for the buffer to fill up a bit */
147 playrtp_fill_buffer();
148 /* Start playing now */
150 next_timestamp
= pheap_first(&packets
)->timestamp
;
152 status
= AudioDeviceStart(adid
, adioproc
);
154 fatal(0, "AudioDeviceStart: %d", (int)status
);
155 /* Wait until the buffer empties out */
156 while(nsamples
>= minbuffer
158 && contains(pheap_first(&packets
), next_timestamp
)))
159 pthread_cond_wait(&cond
, &lock
);
160 /* Stop playing for a bit until the buffer re-fills */
161 status
= AudioDeviceStop(adid
, adioproc
);
163 fatal(0, "AudioDeviceStop: %d", (int)status
);