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
31 #include <CoreAudio/AudioHardware.h>
39 /** @brief Callback from Core Audio */
40 static OSStatus adioproc
41 (AudioDeviceID
attribute((unused
)) inDevice
,
42 const AudioTimeStamp
attribute((unused
)) *inNow
,
43 const AudioBufferList
attribute((unused
)) *inInputData
,
44 const AudioTimeStamp
attribute((unused
)) *inInputTime
,
45 AudioBufferList
*outOutputData
,
46 const AudioTimeStamp
attribute((unused
)) *inOutputTime
,
47 void attribute((unused
)) *inClientData
) {
48 UInt32 nbuffers
= outOutputData
->mNumberBuffers
;
49 AudioBuffer
*ab
= outOutputData
->mBuffers
;
50 uint32_t samples_available
;
52 pthread_mutex_lock(&lock
);
54 float *samplesOut
= ab
->mData
;
55 size_t samplesOutLeft
= ab
->mDataByteSize
/ sizeof (float);
57 while(samplesOutLeft
> 0) {
58 const struct packet
*p
= playrtp_next_packet();
59 if(p
&& contains(p
, next_timestamp
)) {
60 /* This packet is ready to play */
61 const uint32_t packet_end
= p
->timestamp
+ p
->nsamples
;
62 const uint32_t offset
= next_timestamp
- p
->timestamp
;
63 const uint16_t *ptr
= (void *)(p
->samples_raw
+ offset
);
65 samples_available
= packet_end
- next_timestamp
;
66 if(samples_available
> samplesOutLeft
)
67 samples_available
= samplesOutLeft
;
68 next_timestamp
+= samples_available
;
69 samplesOutLeft
-= samples_available
;
70 while(samples_available
-- > 0)
71 *samplesOut
++ = (int16_t)ntohs(*ptr
++) * (0.5 / 32767);
72 /* We don't bother junking the packet - that'll be dealt with next time
75 /* No packet is ready to play (and there might be no packet at all) */
76 samples_available
= p ? p
->timestamp
- next_timestamp
78 if(samples_available
> samplesOutLeft
)
79 samples_available
= samplesOutLeft
;
80 //info("infill by %"PRIu32, samples_available);
81 /* Conveniently the buffer is 0 to start with */
82 next_timestamp
+= samples_available
;
83 samplesOut
+= samples_available
;
84 samplesOutLeft
-= samples_available
;
90 pthread_mutex_unlock(&lock
);
94 void playrtp_coreaudio(void) {
98 AudioStreamBasicDescription asbd
;
100 /* If this looks suspiciously like libao's macosx driver there's an
101 * excellent reason for that... */
103 /* TODO report errors as strings not numbers */
104 propertySize
= sizeof adid
;
105 status
= AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice
,
106 &propertySize
, &adid
);
108 fatal(0, "AudioHardwareGetProperty: %d", (int)status
);
109 if(adid
== kAudioDeviceUnknown
)
110 fatal(0, "no output device");
111 propertySize
= sizeof asbd
;
112 status
= AudioDeviceGetProperty(adid
, 0, false,
113 kAudioDevicePropertyStreamFormat
,
114 &propertySize
, &asbd
);
116 fatal(0, "AudioHardwareGetProperty: %d", (int)status
);
117 D(("mSampleRate %f", asbd
.mSampleRate
));
118 D(("mFormatID %08lx", asbd
.mFormatID
));
119 D(("mFormatFlags %08lx", asbd
.mFormatFlags
));
120 D(("mBytesPerPacket %08lx", asbd
.mBytesPerPacket
));
121 D(("mFramesPerPacket %08lx", asbd
.mFramesPerPacket
));
122 D(("mBytesPerFrame %08lx", asbd
.mBytesPerFrame
));
123 D(("mChannelsPerFrame %08lx", asbd
.mChannelsPerFrame
));
124 D(("mBitsPerChannel %08lx", asbd
.mBitsPerChannel
));
125 D(("mReserved %08lx", asbd
.mReserved
));
126 if(asbd
.mFormatID
!= kAudioFormatLinearPCM
)
127 fatal(0, "audio device does not support kAudioFormatLinearPCM");
128 status
= AudioDeviceAddIOProc(adid
, adioproc
, 0);
130 fatal(0, "AudioDeviceAddIOProc: %d", (int)status
);
131 pthread_mutex_lock(&lock
);
133 /* Wait for the buffer to fill up a bit */
134 playrtp_fill_buffer();
135 /* Start playing now */
137 next_timestamp
= pheap_first(&packets
)->timestamp
;
139 status
= AudioDeviceStart(adid
, adioproc
);
141 fatal(0, "AudioDeviceStart: %d", (int)status
);
142 /* Wait until the buffer empties out */
143 while(nsamples
>= minbuffer
145 && contains(pheap_first(&packets
), next_timestamp
)))
146 pthread_cond_wait(&cond
, &lock
);
147 /* Stop playing for a bit until the buffer re-fills */
148 status
= AudioDeviceStop(adid
, adioproc
);
150 fatal(0, "AudioDeviceStop: %d", (int)status
);