1 /*****************************************************************************
2 * Copyright (C) 2000-2013 VLC authors and VideoLAN
5 * Authors: Romain Goyet <romain.goyet@likid.org>
6 * Felix Paul Kühne <fkuehne at videolan dot org>
8 * Rafaël Carré <funman at videolan dot org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
30 #import <vlc_common.h>
31 #import <vlc_plugin.h>
33 #import <AudioToolBox/AudioQueue.h>
34 #import <AudioToolBox/AudioSession.h>
35 #import <TargetConditionals.h>
38 #pragma mark private declarations
42 AudioQueueRef audioQueueRef;
43 AudioQueueTimelineRef timelineRef;
45 mtime_t i_played_length;
49 static int Open (vlc_object_t *);
50 static void Close (vlc_object_t *);
51 static void Play (audio_output_t *, block_t *);
52 static void Pause (audio_output_t *p_aout, bool pause, mtime_t date);
53 static void Flush (audio_output_t *p_aout, bool wait);
54 static int TimeGet (audio_output_t *aout, mtime_t *);
55 static void UnusedAudioQueueCallback (void *, AudioQueueRef, AudioQueueBufferRef);
56 static int Start(audio_output_t *, audio_sample_format_t *);
57 static void Stop(audio_output_t *);
58 static int VolumeSet(audio_output_t *, float );
60 set_shortname("AudioQueue")
61 set_description(N_("AudioQueue (iOS / Mac OS) audio output"))
62 set_capability("audio output", 40)
63 set_category(CAT_AUDIO)
64 set_subcategory(SUBCAT_AUDIO_AOUT)
65 add_shortcut("audioqueue")
66 set_callbacks(Open, Close)
70 #pragma mark initialization
72 static int Open(vlc_object_t *obj)
74 audio_output_t *aout = (audio_output_t *)obj;
75 aout_sys_t *sys = malloc(sizeof (*sys));
77 if (unlikely(sys == NULL))
83 aout->volume_set = VolumeSet;
86 aout_VolumeReport(aout, 1.0);
91 static void Close(vlc_object_t *obj)
93 audio_output_t *aout = (audio_output_t *)obj;
94 msg_Dbg( aout, "audioqueue: Close");
95 aout_sys_t *sys = aout->sys;
100 static int VolumeSet(audio_output_t * p_aout, float volume)
102 struct aout_sys_t *p_sys = p_aout->sys;
105 aout_VolumeReport(p_aout, volume);
106 p_sys->f_volume = volume;
108 /* Set volume for output unit */
109 ostatus = AudioQueueSetParameter(p_sys->audioQueueRef, kAudioQueueParam_Volume, volume * volume * volume);
114 static int Start(audio_output_t *p_aout, audio_sample_format_t *restrict fmt)
116 aout_sys_t *p_sys = p_aout->sys;
119 // prepare the format description for our output
120 AudioStreamBasicDescription streamDescription;
121 streamDescription.mSampleRate = fmt->i_rate;
122 streamDescription.mFormatID = kAudioFormatLinearPCM;
123 streamDescription.mFormatFlags = kAudioFormatFlagsNativeFloatPacked; // FL32
124 streamDescription.mFramesPerPacket = 1;
125 streamDescription.mChannelsPerFrame = 2;
126 streamDescription.mBitsPerChannel = 32;
127 streamDescription.mBytesPerFrame = streamDescription.mBitsPerChannel * streamDescription.mChannelsPerFrame / 8;
128 streamDescription.mBytesPerPacket = streamDescription.mBytesPerFrame * streamDescription.mFramesPerPacket;
130 // init new output instance
131 error = AudioQueueNewOutput(&streamDescription, // Format
132 UnusedAudioQueueCallback, // Unused Callback, which needs to be provided to have a proper instance
133 NULL, // User data, passed to the callback
135 kCFRunLoopCommonModes, // RunLoop mode
136 0, // Flags ; must be zero (per documentation)...
137 &(p_sys->audioQueueRef)); // Output
138 msg_Dbg(p_aout, "New AudioQueue instance created (status = %li)", error);
142 fmt->i_format = VLC_CODEC_FL32;
143 fmt->i_physical_channels = AOUT_CHANS_STEREO;
144 aout_FormatPrepare(fmt);
145 p_aout->sys->i_rate = fmt->i_rate;
148 error = AudioQueueStart(p_sys->audioQueueRef, NULL);
149 msg_Dbg(p_aout, "Starting AudioQueue (status = %li)", error);
151 // start timeline for synchro
152 error = AudioQueueCreateTimeline(p_sys->audioQueueRef, &p_sys->timelineRef);
153 msg_Dbg(p_aout, "AudioQueue Timeline started (status = %li)", error);
157 #ifdef TARGET_OS_IPHONE
158 // start audio session so playback continues if mute switch is on
159 AudioSessionInitialize (NULL,
160 kCFRunLoopCommonModes,
164 // Set audio session to mediaplayback
165 UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
166 AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory),&sessionCategory);
167 AudioSessionSetActive(true);
170 p_aout->time_get = TimeGet;
172 p_aout->pause = Pause;
173 p_aout->flush = Flush;
178 static void Stop(audio_output_t *p_aout)
180 #ifdef TARGET_OS_IPHONE
181 AudioSessionSetActive(false);
184 p_aout->sys->i_played_length = 0;
185 AudioQueueDisposeTimeline(p_aout->sys->audioQueueRef, p_aout->sys->timelineRef);
186 AudioQueueStop(p_aout->sys->audioQueueRef, true);
187 AudioQueueDispose(p_aout->sys->audioQueueRef, true);
188 msg_Dbg(p_aout, "audioqueue stopped and disposed");
192 #pragma mark actual playback
194 static void Play(audio_output_t *p_aout, block_t *p_block)
196 AudioQueueBufferRef inBuffer = NULL;
199 status = AudioQueueAllocateBuffer(p_aout->sys->audioQueueRef, p_block->i_buffer, &inBuffer);
200 if (status == noErr) {
201 memcpy(inBuffer->mAudioData, p_block->p_buffer, p_block->i_buffer);
202 inBuffer->mAudioDataByteSize = p_block->i_buffer;
204 status = AudioQueueEnqueueBuffer(p_aout->sys->audioQueueRef, inBuffer, 0, NULL);
206 p_aout->sys->i_played_length += p_block->i_length;
208 msg_Err(p_aout, "enqueuing buffer failed (%li)", status);
210 msg_Err(p_aout, "buffer alloction failed (%li)", status);
212 block_Release(p_block);
215 void UnusedAudioQueueCallback(void * inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer) {
216 /* this function does nothing, but needs to be here to make the AudioQueue API happy.
217 * without a callback, it will refuse to create an AudioQueue instance. */
218 VLC_UNUSED(inUserData);
220 VLC_UNUSED(inBuffer);
223 static void Pause(audio_output_t *p_aout, bool pause, mtime_t date)
228 AudioQueuePause(p_aout->sys->audioQueueRef);
229 #ifdef TARGET_OS_IPHONE
230 AudioSessionSetActive(false);
233 AudioQueueStart(p_aout->sys->audioQueueRef, NULL);
234 #ifdef TARGET_OS_IPHONE
235 AudioSessionSetActive(true);
240 static void Flush(audio_output_t *p_aout, bool wait)
242 if (!p_aout->sys->audioQueueRef)
245 AudioQueueDisposeTimeline(p_aout->sys->audioQueueRef, p_aout->sys->timelineRef);
248 AudioQueueStop(p_aout->sys->audioQueueRef, false);
250 AudioQueueStop(p_aout->sys->audioQueueRef, true);
252 p_aout->sys->i_played_length = 0;
253 AudioQueueStart(p_aout->sys->audioQueueRef, NULL);
254 AudioQueueCreateTimeline(p_aout->sys->audioQueueRef, &p_aout->sys->timelineRef);
257 static int TimeGet(audio_output_t *p_aout, mtime_t *restrict delay)
259 AudioTimeStamp outTimeStamp;
260 Boolean b_discontinuity;
261 OSStatus status = AudioQueueGetCurrentTime(p_aout->sys->audioQueueRef, p_aout->sys->timelineRef, &outTimeStamp, &b_discontinuity);
267 msg_Dbg(p_aout, "detected output discontinuity");
269 mtime_t i_pos = (mtime_t) outTimeStamp.mSampleTime * CLOCK_FREQ / p_aout->sys->i_rate;
270 *delay = p_aout->sys->i_played_length - i_pos;