| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2007 Richard Kettlewell |
| 4 | * |
| 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. |
| 9 | * |
| 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. |
| 14 | * |
| 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 |
| 18 | * USA |
| 19 | */ |
| 20 | /** @file clients/playrtp-coreaudio.c |
| 21 | * @brief RTP player - Core Audio support |
| 22 | */ |
| 23 | |
| 24 | #include <config.h> |
| 25 | |
| 26 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H |
| 27 | #include "types.h" |
| 28 | |
| 29 | #include <assert.h> |
| 30 | #include <pthread.h> |
| 31 | #include <CoreAudio/AudioHardware.h> |
| 32 | |
| 33 | #include "mem.h" |
| 34 | #include "log.h" |
| 35 | #include "vector.h" |
| 36 | #include "heap.h" |
| 37 | #include "playrtp.h" |
| 38 | |
| 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; |
| 51 | |
| 52 | pthread_mutex_lock(&lock); |
| 53 | while(nbuffers > 0) { |
| 54 | float *samplesOut = ab->mData; |
| 55 | size_t samplesOutLeft = ab->mDataByteSize / sizeof (float); |
| 56 | |
| 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); |
| 64 | |
| 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 | if(dump_buffer) { |
| 71 | size_t n; |
| 72 | |
| 73 | for(n = 0; n < samples_available; ++n) { |
| 74 | dump_buffer[dump_index++] = (int16_t)ntohs(ptr[n]); |
| 75 | dump_index %= dump_size; |
| 76 | } |
| 77 | } |
| 78 | while(samples_available-- > 0) |
| 79 | *samplesOut++ = (int16_t)ntohs(*ptr++) * (0.5 / 32767); |
| 80 | /* We don't bother junking the packet - that'll be dealt with next time |
| 81 | * round */ |
| 82 | } else { |
| 83 | /* No packet is ready to play (and there might be no packet at all) */ |
| 84 | samples_available = p ? p->timestamp - next_timestamp |
| 85 | : samplesOutLeft; |
| 86 | if(samples_available > samplesOutLeft) |
| 87 | samples_available = samplesOutLeft; |
| 88 | //info("infill by %"PRIu32, samples_available); |
| 89 | /* Conveniently the buffer is 0 to start with */ |
| 90 | next_timestamp += samples_available; |
| 91 | samplesOut += samples_available; |
| 92 | samplesOutLeft -= samples_available; |
| 93 | if(dump_buffer) { |
| 94 | size_t n; |
| 95 | |
| 96 | for(n = 0; n < samples_available; ++n) { |
| 97 | dump_buffer[dump_index++] = 0; |
| 98 | dump_index %= dump_size; |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | ++ab; |
| 104 | --nbuffers; |
| 105 | } |
| 106 | pthread_mutex_unlock(&lock); |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | void playrtp_coreaudio(void) { |
| 111 | OSStatus status; |
| 112 | UInt32 propertySize; |
| 113 | AudioDeviceID adid; |
| 114 | AudioStreamBasicDescription asbd; |
| 115 | |
| 116 | /* If this looks suspiciously like libao's macosx driver there's an |
| 117 | * excellent reason for that... */ |
| 118 | |
| 119 | /* TODO report errors as strings not numbers */ |
| 120 | propertySize = sizeof adid; |
| 121 | status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, |
| 122 | &propertySize, &adid); |
| 123 | if(status) |
| 124 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); |
| 125 | if(adid == kAudioDeviceUnknown) |
| 126 | fatal(0, "no output device"); |
| 127 | propertySize = sizeof asbd; |
| 128 | status = AudioDeviceGetProperty(adid, 0, false, |
| 129 | kAudioDevicePropertyStreamFormat, |
| 130 | &propertySize, &asbd); |
| 131 | if(status) |
| 132 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); |
| 133 | D(("mSampleRate %f", asbd.mSampleRate)); |
| 134 | D(("mFormatID %08lx", asbd.mFormatID)); |
| 135 | D(("mFormatFlags %08lx", asbd.mFormatFlags)); |
| 136 | D(("mBytesPerPacket %08lx", asbd.mBytesPerPacket)); |
| 137 | D(("mFramesPerPacket %08lx", asbd.mFramesPerPacket)); |
| 138 | D(("mBytesPerFrame %08lx", asbd.mBytesPerFrame)); |
| 139 | D(("mChannelsPerFrame %08lx", asbd.mChannelsPerFrame)); |
| 140 | D(("mBitsPerChannel %08lx", asbd.mBitsPerChannel)); |
| 141 | D(("mReserved %08lx", asbd.mReserved)); |
| 142 | if(asbd.mFormatID != kAudioFormatLinearPCM) |
| 143 | fatal(0, "audio device does not support kAudioFormatLinearPCM"); |
| 144 | status = AudioDeviceAddIOProc(adid, adioproc, 0); |
| 145 | if(status) |
| 146 | fatal(0, "AudioDeviceAddIOProc: %d", (int)status); |
| 147 | pthread_mutex_lock(&lock); |
| 148 | for(;;) { |
| 149 | /* Wait for the buffer to fill up a bit */ |
| 150 | playrtp_fill_buffer(); |
| 151 | /* Start playing now */ |
| 152 | info("Playing..."); |
| 153 | next_timestamp = pheap_first(&packets)->timestamp; |
| 154 | active = 1; |
| 155 | status = AudioDeviceStart(adid, adioproc); |
| 156 | if(status) |
| 157 | fatal(0, "AudioDeviceStart: %d", (int)status); |
| 158 | /* Wait until the buffer empties out */ |
| 159 | while(nsamples >= minbuffer |
| 160 | || (nsamples > 0 |
| 161 | && contains(pheap_first(&packets), next_timestamp))) |
| 162 | pthread_cond_wait(&cond, &lock); |
| 163 | /* Stop playing for a bit until the buffer re-fills */ |
| 164 | status = AudioDeviceStop(adid, adioproc); |
| 165 | if(status) |
| 166 | fatal(0, "AudioDeviceStop: %d", (int)status); |
| 167 | active = 0; |
| 168 | /* Go back round */ |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | #endif |
| 173 | |
| 174 | /* |
| 175 | Local Variables: |
| 176 | c-basic-offset:2 |
| 177 | comment-column:40 |
| 178 | fill-column:79 |
| 179 | indent-tabs-mode:nil |
| 180 | End: |
| 181 | */ |