trunk/src/osd/modules/sound/coreaudio_sound.c
| r0 | r245447 | |
|---|
| 1 | // license:BSD-3-Clause |
| 2 | // copyright-holders:Vas Crabb |
| 3 | //============================================================ |
| 4 | // |
| 5 | // sound.c - CoreAudio implementation of MAME sound routines |
| 6 | // |
| 7 | // Copyright (c) 1996-2015, Nicola Salmoria and the MAME Team. |
| 8 | // Visit http://mamedev.org for licensing and usage restrictions. |
| 9 | // |
| 10 | //============================================================ |
| 11 | |
| 12 | #include "sound_module.h" |
| 13 | #include "modules/osdmodule.h" |
| 14 | |
| 15 | #ifdef SDLMAME_MACOSX |
| 16 | |
| 17 | #include <AudioUnit/AudioUnit.h> |
| 18 | #include <CoreAudio/CoreAudio.h> |
| 19 | #include <CoreServices/CoreServices.h> |
| 20 | |
| 21 | |
| 22 | class sound_coreaudio : public osd_module, public sound_module |
| 23 | { |
| 24 | public: |
| 25 | sound_coreaudio() : |
| 26 | osd_module(OSD_SOUND_PROVIDER, "coreaudio"), |
| 27 | sound_module(), |
| 28 | m_open(false), |
| 29 | m_started(false), |
| 30 | m_attenuation(0), |
| 31 | m_scale(128), |
| 32 | m_sample_bytes(0), |
| 33 | m_headroom(0), |
| 34 | m_buffer_size(0), |
| 35 | m_buffer(NULL), |
| 36 | m_playpos(0), |
| 37 | m_writepos(0), |
| 38 | m_in_underrun(false), |
| 39 | m_overflows(0), |
| 40 | m_underflows(0) |
| 41 | { |
| 42 | } |
| 43 | virtual ~sound_coreaudio() |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | virtual int init(); |
| 48 | virtual void exit(); |
| 49 | |
| 50 | // sound_module |
| 51 | |
| 52 | virtual void update_audio_stream(bool is_throttled, INT16 const *buffer, int samples_this_frame); |
| 53 | virtual void set_mastervolume(int attenuation); |
| 54 | |
| 55 | private: |
| 56 | enum |
| 57 | { |
| 58 | LATENCY_MIN = 1, |
| 59 | LATENCY_MAX = 5 |
| 60 | }; |
| 61 | |
| 62 | UINT32 clamped_latency() const { return MAX(MIN(m_audio_latency, LATENCY_MAX), LATENCY_MIN); } |
| 63 | UINT32 buffer_avail() const { return ((m_writepos <= m_playpos) ? m_buffer_size : 0) + m_playpos - m_writepos; } |
| 64 | UINT32 buffer_used() const { return ((m_playpos < m_writepos) ? m_buffer_size : 0) + m_writepos - m_playpos; } |
| 65 | |
| 66 | void copy_scaled(void *dst, void const *src, UINT32 bytes) const |
| 67 | { |
| 68 | bytes /= sizeof(INT16); |
| 69 | INT16 const *s = (INT16 const *)src; |
| 70 | for (INT16 *d = (INT16 *)dst; bytes > 0; bytes--, s++, d++) |
| 71 | *d = (*s * m_scale) >> 7; |
| 72 | } |
| 73 | |
| 74 | OSStatus render( |
| 75 | AudioUnitRenderActionFlags *action_flags, |
| 76 | const AudioTimeStamp *timestamp, |
| 77 | UInt32 bus_number, |
| 78 | UInt32 number_frames, |
| 79 | AudioBufferList *data); |
| 80 | |
| 81 | static OSStatus render_callback( |
| 82 | void *refcon, |
| 83 | AudioUnitRenderActionFlags *action_flags, |
| 84 | const AudioTimeStamp *timestamp, |
| 85 | UInt32 bus_number, |
| 86 | UInt32 number_frames, |
| 87 | AudioBufferList *data); |
| 88 | |
| 89 | bool m_open; |
| 90 | bool m_started; |
| 91 | AudioUnit m_output; |
| 92 | int m_attenuation; |
| 93 | UINT32 m_scale; |
| 94 | UINT32 m_sample_bytes; |
| 95 | UINT32 m_headroom; |
| 96 | UINT32 m_buffer_size; |
| 97 | INT8 *m_buffer; |
| 98 | UINT32 m_playpos; |
| 99 | UINT32 m_writepos; |
| 100 | bool m_in_underrun; |
| 101 | unsigned m_overflows; |
| 102 | unsigned m_underflows; |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | int sound_coreaudio::init() |
| 107 | { |
| 108 | OSStatus err; |
| 109 | |
| 110 | // Don't bother with any of this if sound is disabled |
| 111 | if (sample_rate() == 0) |
| 112 | return 0; |
| 113 | |
| 114 | // Get the Default Output AudioUnit component and open an instance |
| 115 | ComponentDescription output_desc; |
| 116 | output_desc.componentType = kAudioUnitType_Output; |
| 117 | output_desc.componentSubType = kAudioUnitSubType_DefaultOutput; |
| 118 | output_desc.componentManufacturer = kAudioUnitManufacturer_Apple; |
| 119 | output_desc.componentFlags = 0; |
| 120 | output_desc.componentFlagsMask = 0; |
| 121 | Component output_comp = FindNextComponent(NULL, &output_desc); |
| 122 | if (!output_comp) |
| 123 | { |
| 124 | osd_printf_error("Could not find Default Output AudioUnit component\n"); |
| 125 | return -1; |
| 126 | } |
| 127 | err = OpenAComponent(output_comp, &m_output); |
| 128 | if (noErr != err) |
| 129 | { |
| 130 | osd_printf_error("Could not open Default Output AudioUnit component (%ld)\n", (long)err); |
| 131 | return -1; |
| 132 | } |
| 133 | |
| 134 | // Set render callback |
| 135 | AURenderCallbackStruct renderer; |
| 136 | renderer.inputProc = sound_coreaudio::render_callback; |
| 137 | renderer.inputProcRefCon = this; |
| 138 | err = AudioUnitSetProperty(m_output, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderer, sizeof(renderer)); |
| 139 | if (noErr != err) |
| 140 | { |
| 141 | CloseComponent(m_output); |
| 142 | osd_printf_error("Could not set audio output render callback (%ld)\n", (long)err); |
| 143 | return -1; |
| 144 | } |
| 145 | |
| 146 | // Set audio stream format for two-channel native-endian 16-bit packed linear PCM |
| 147 | AudioStreamBasicDescription format; |
| 148 | format.mSampleRate = sample_rate(); |
| 149 | format.mFormatID = kAudioFormatLinearPCM; |
| 150 | format.mFormatFlags = kAudioFormatFlagsNativeEndian |
| 151 | | kLinearPCMFormatFlagIsSignedInteger |
| 152 | | kLinearPCMFormatFlagIsPacked; |
| 153 | format.mFramesPerPacket = 1; |
| 154 | format.mChannelsPerFrame = 2; |
| 155 | format.mBitsPerChannel = 16; |
| 156 | format.mBytesPerFrame = format.mChannelsPerFrame * format.mBitsPerChannel / 8; |
| 157 | format.mBytesPerPacket = format.mFramesPerPacket * format.mBytesPerFrame; |
| 158 | err = AudioUnitSetProperty(m_output, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &format, sizeof(format)); |
| 159 | if (noErr != err) |
| 160 | { |
| 161 | CloseComponent(m_output); |
| 162 | osd_printf_error("Could not set audio output stream format (%ld)\n", (long)err); |
| 163 | return -1; |
| 164 | } |
| 165 | m_sample_bytes = format.mBytesPerFrame; |
| 166 | |
| 167 | // Allocate buffer |
| 168 | m_headroom = (clamped_latency() * sample_rate() / 40) * m_sample_bytes; |
| 169 | m_buffer_size = MAX((sample_rate() * m_sample_bytes * (clamped_latency() + 2) / 20480) * 1024, m_sample_bytes * 256); |
| 170 | m_buffer = global_alloc_array_clear(INT8, m_buffer_size); |
| 171 | if (!m_buffer) |
| 172 | { |
| 173 | CloseComponent(m_output); |
| 174 | osd_printf_error("Could not allocate stream buffer\n"); |
| 175 | return -1; |
| 176 | } |
| 177 | m_playpos = 0; |
| 178 | m_writepos = m_headroom; |
| 179 | m_in_underrun = false; |
| 180 | m_overflows = m_underflows = 0; |
| 181 | |
| 182 | // Initialise and start |
| 183 | err = AudioUnitInitialize(m_output); |
| 184 | if (noErr != err) |
| 185 | { |
| 186 | CloseComponent(m_output); |
| 187 | global_free_array(m_buffer); |
| 188 | m_buffer = NULL; |
| 189 | osd_printf_error("Could not initialize audio output (%ld)\n", (long)err); |
| 190 | return -1; |
| 191 | } |
| 192 | err = AudioOutputUnitStart(m_output); |
| 193 | if (noErr != err) |
| 194 | { |
| 195 | AudioUnitUninitialize(m_output); |
| 196 | CloseComponent(m_output); |
| 197 | global_free_array(m_buffer); |
| 198 | m_buffer = NULL; |
| 199 | osd_printf_error("Could not start audio output (%ld)\n", (long)err); |
| 200 | return -1; |
| 201 | } |
| 202 | m_open = true; |
| 203 | m_started = true; |
| 204 | osd_printf_verbose("Audio: End initialization\n"); |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | |
| 209 | void sound_coreaudio::exit() |
| 210 | { |
| 211 | if (m_open) |
| 212 | { |
| 213 | osd_printf_verbose("Closing output AudioUnit component\n"); |
| 214 | AudioOutputUnitStop(m_output); |
| 215 | AudioUnitUninitialize(m_output); |
| 216 | CloseComponent(m_output); |
| 217 | m_open = false; |
| 218 | m_started = false; |
| 219 | } |
| 220 | if (m_buffer) |
| 221 | { |
| 222 | global_free_array(m_buffer); |
| 223 | m_buffer = NULL; |
| 224 | } |
| 225 | if (m_overflows || m_underflows) |
| 226 | osd_printf_verbose("Sound buffer: overflows=%u underflows=%u\n", m_overflows, m_underflows); |
| 227 | } |
| 228 | |
| 229 | |
| 230 | void sound_coreaudio::update_audio_stream(bool is_throttled, INT16 const *buffer, int samples_this_frame) |
| 231 | { |
| 232 | if ((sample_rate() == 0) || !m_buffer) |
| 233 | return; |
| 234 | |
| 235 | UINT32 const bytes_this_frame = samples_this_frame * m_sample_bytes; |
| 236 | if (bytes_this_frame >= buffer_avail()) |
| 237 | { |
| 238 | m_overflows++; |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | UINT32 const chunk = MIN(m_buffer_size - m_writepos, bytes_this_frame); |
| 243 | memcpy(m_buffer + m_writepos, (INT8 *)buffer, chunk); |
| 244 | m_writepos += chunk; |
| 245 | if (m_writepos >= m_buffer_size) |
| 246 | m_writepos = 0; |
| 247 | |
| 248 | if (chunk < bytes_this_frame) |
| 249 | { |
| 250 | assert(0U == m_writepos); |
| 251 | assert(m_playpos > (bytes_this_frame - chunk)); |
| 252 | memcpy(m_buffer, (INT8 *)buffer + chunk, bytes_this_frame - chunk); |
| 253 | m_writepos += bytes_this_frame - chunk; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | |
| 258 | void sound_coreaudio::set_mastervolume(int attenuation) |
| 259 | { |
| 260 | m_attenuation = MAX(MIN(attenuation, 0), -32); |
| 261 | m_scale = (UINT32)(pow(10.0, m_attenuation / 20.0) * 128); |
| 262 | if (m_open) |
| 263 | { |
| 264 | if (-32 == m_attenuation) |
| 265 | { |
| 266 | if (m_started) |
| 267 | { |
| 268 | if (noErr == AudioOutputUnitStop(m_output)) |
| 269 | m_started = false; |
| 270 | } |
| 271 | } |
| 272 | else |
| 273 | { |
| 274 | if (!m_started) |
| 275 | { |
| 276 | if (noErr == AudioOutputUnitStart(m_output)) |
| 277 | m_started = true; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | |
| 284 | OSStatus sound_coreaudio::render( |
| 285 | AudioUnitRenderActionFlags *action_flags, |
| 286 | const AudioTimeStamp *timestamp, |
| 287 | UInt32 bus_number, |
| 288 | UInt32 number_frames, |
| 289 | AudioBufferList *data) |
| 290 | { |
| 291 | UINT32 const number_bytes = number_frames * m_sample_bytes; |
| 292 | UINT32 const used = buffer_used(); |
| 293 | if (m_in_underrun && (used < m_headroom)) |
| 294 | { |
| 295 | memset(data->mBuffers[0].mData, 0, number_bytes); |
| 296 | return noErr; |
| 297 | } |
| 298 | m_in_underrun = false; |
| 299 | if (number_bytes > used) |
| 300 | { |
| 301 | m_in_underrun = true; |
| 302 | m_underflows++; |
| 303 | memset(data->mBuffers[0].mData, 0, number_bytes); |
| 304 | return noErr; |
| 305 | } |
| 306 | |
| 307 | UINT32 const chunk = MIN(m_buffer_size - m_playpos, number_bytes); |
| 308 | copy_scaled((INT8 *)data->mBuffers[0].mData, m_buffer + m_playpos, chunk); |
| 309 | m_playpos += chunk; |
| 310 | if (m_playpos >= m_buffer_size) |
| 311 | m_playpos = 0; |
| 312 | |
| 313 | if (chunk < number_bytes) |
| 314 | { |
| 315 | assert(0U == m_playpos); |
| 316 | assert(m_writepos >= (number_bytes - chunk)); |
| 317 | copy_scaled((INT8 *)data->mBuffers[0].mData + chunk, m_buffer, number_bytes - chunk); |
| 318 | m_playpos += number_bytes - chunk; |
| 319 | } |
| 320 | |
| 321 | return noErr; |
| 322 | } |
| 323 | |
| 324 | |
| 325 | OSStatus sound_coreaudio::render_callback( |
| 326 | void *refcon, |
| 327 | AudioUnitRenderActionFlags *action_flags, |
| 328 | const AudioTimeStamp *timestamp, |
| 329 | UInt32 bus_number, |
| 330 | UInt32 number_frames, |
| 331 | AudioBufferList *data) |
| 332 | { |
| 333 | return ((sound_coreaudio *)refcon)->render(action_flags, timestamp, bus_number, number_frames, data); |
| 334 | } |
| 335 | |
| 336 | #else /* SDLMAME_MACOSX */ |
| 337 | MODULE_NOT_SUPPORTED(sound_coreaudio, OSD_SOUND_PROVIDER, "coreaudio") |
| 338 | #endif |
| 339 | |
| 340 | MODULE_DEFINITION(SOUND_COREAUDIO, sound_coreaudio) |