| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #if defined(__APPLE__) && defined(__MACH__) |
| # include <Carbon/Carbon.h> |
| #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335) |
| # include <Carbon.h> |
| #else |
| # include <Sound.h> /* SoundManager interface */ |
| # include <Gestalt.h> |
| # include <DriverServices.h> |
| #endif |
| |
| #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335) |
| #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */ |
| #define NewSndCallBackUPP NewSndCallBackProc |
| #endif |
| #if !defined(NewSndCallBackUPP) |
| #define NewSndCallBackUPP NewSndCallBackProc |
| #endif |
| #endif |
| |
| #include "SDL_audio.h" |
| #include "../SDL_audio_c.h" |
| #include "../SDL_sysaudio.h" |
| #include "SDL_romaudio.h" |
| |
| /* Audio driver functions */ |
| |
| static void Mac_CloseAudio(_THIS); |
| static int Mac_OpenAudio(_THIS, SDL_AudioSpec * spec); |
| static void Mac_LockAudio(_THIS); |
| static void Mac_UnlockAudio(_THIS); |
| |
| /* Audio driver bootstrap functions */ |
| |
| |
| static int |
| Audio_Available(void) |
| { |
| return (1); |
| } |
| |
| static void |
| Audio_DeleteDevice(SDL_AudioDevice * device) |
| { |
| SDL_free(device->hidden); |
| SDL_free(device); |
| } |
| |
| static SDL_AudioDevice * |
| Audio_CreateDevice(int devindex) |
| { |
| SDL_AudioDevice *this; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice)); |
| if (this) { |
| SDL_memset(this, 0, (sizeof *this)); |
| this->hidden = (struct SDL_PrivateAudioData *) |
| SDL_malloc((sizeof *this->hidden)); |
| } |
| if ((this == NULL) || (this->hidden == NULL)) { |
| SDL_OutOfMemory(); |
| if (this) { |
| SDL_free(this); |
| } |
| return (0); |
| } |
| SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| |
| /* Set the function pointers */ |
| this->OpenAudio = Mac_OpenAudio; |
| this->CloseAudio = Mac_CloseAudio; |
| this->LockAudio = Mac_LockAudio; |
| this->UnlockAudio = Mac_UnlockAudio; |
| this->free = Audio_DeleteDevice; |
| |
| #ifdef __MACOSX__ /* Mac OS X uses threaded audio, so normal thread code is okay */ |
| this->LockAudio = NULL; |
| this->UnlockAudio = NULL; |
| #endif |
| return this; |
| } |
| |
| AudioBootStrap SNDMGR_bootstrap = { |
| "sndmgr", "MacOS SoundManager 3.0", |
| Audio_Available, Audio_CreateDevice |
| }; |
| |
| #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
| /* This works correctly on Mac OS X */ |
| |
| #pragma options align=power |
| |
| static volatile SInt32 audio_is_locked = 0; |
| static volatile SInt32 need_to_mix = 0; |
| |
| static UInt8 *buffer[2]; |
| static volatile UInt32 running = 0; |
| static CmpSoundHeader header; |
| static volatile Uint32 fill_me = 0; |
| |
| static void |
| mix_buffer(SDL_AudioDevice * audio, UInt8 * buffer) |
| { |
| if (!audio->paused) { |
| #ifdef __MACOSX__ |
| SDL_mutexP(audio->mixer_lock); |
| #endif |
| if (audio->convert.needed) { |
| audio->spec.callback(audio->spec.userdata, |
| (Uint8 *) audio->convert.buf, |
| audio->convert.len); |
| SDL_ConvertAudio(&audio->convert); |
| if (audio->convert.len_cvt != audio->spec.size) { |
| /* Uh oh... probably crashes here */ ; |
| } |
| SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt); |
| } else { |
| audio->spec.callback(audio->spec.userdata, buffer, |
| audio->spec.size); |
| } |
| #ifdef __MACOSX__ |
| SDL_mutexV(audio->mixer_lock); |
| #endif |
| } |
| |
| DecrementAtomic((SInt32 *) & need_to_mix); |
| } |
| |
| static void |
| Mac_LockAudio(_THIS) |
| { |
| IncrementAtomic((SInt32 *) & audio_is_locked); |
| } |
| |
| static void |
| Mac_UnlockAudio(_THIS) |
| { |
| SInt32 oldval; |
| |
| oldval = DecrementAtomic((SInt32 *) & audio_is_locked); |
| if (oldval != 1) /* != 1 means audio is still locked. */ |
| return; |
| |
| /* Did we miss the chance to mix in an interrupt? Do it now. */ |
| if (BitAndAtomic(0xFFFFFFFF, (UInt32 *) & need_to_mix)) { |
| /* |
| * Note that this could be a problem if you missed an interrupt |
| * while the audio was locked, and get preempted by a second |
| * interrupt here, but that means you locked for way too long anyhow. |
| */ |
| mix_buffer(this, buffer[fill_me]); |
| } |
| } |
| |
| static void |
| callBackProc(SndChannel * chan, SndCommand * cmd_passed) |
| { |
| UInt32 play_me; |
| SndCommand cmd; |
| SDL_AudioDevice *audio = (SDL_AudioDevice *) chan->userInfo; |
| |
| IncrementAtomic((SInt32 *) & need_to_mix); |
| |
| fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| play_me = !fill_me; /* filled buffer to play _now_ */ |
| |
| if (!audio->enabled) { |
| return; |
| } |
| |
| /* queue previously mixed buffer for playback. */ |
| header.samplePtr = (Ptr) buffer[play_me]; |
| cmd.cmd = bufferCmd; |
| cmd.param1 = 0; |
| cmd.param2 = (long) &header; |
| SndDoCommand(chan, &cmd, 0); |
| |
| memset(buffer[fill_me], 0, audio->spec.size); |
| |
| /* |
| * if audio device isn't locked, mix the next buffer to be queued in |
| * the memory block that just finished playing. |
| */ |
| if (!BitAndAtomic(0xFFFFFFFF, (UInt32 *) & audio_is_locked)) { |
| mix_buffer(audio, buffer[fill_me]); |
| } |
| |
| /* set this callback to run again when current buffer drains. */ |
| if (running) { |
| cmd.cmd = callBackCmd; |
| cmd.param1 = 0; |
| cmd.param2 = play_me; |
| |
| SndDoCommand(chan, &cmd, 0); |
| } |
| } |
| |
| static int |
| Mac_OpenAudio(_THIS, SDL_AudioSpec * spec) |
| { |
| |
| SndCallBackUPP callback; |
| int sample_bits; |
| int i; |
| long initOptions; |
| |
| /* Very few conversions are required, but... */ |
| switch (spec->format) { |
| case AUDIO_S8: |
| spec->format = AUDIO_U8; |
| break; |
| case AUDIO_U16LSB: |
| spec->format = AUDIO_S16LSB; |
| break; |
| case AUDIO_U16MSB: |
| spec->format = AUDIO_S16MSB; |
| break; |
| } |
| SDL_CalculateAudioSpec(spec); |
| |
| /* initialize bufferCmd header */ |
| memset(&header, 0, sizeof(header)); |
| callback = (SndCallBackUPP) NewSndCallBackUPP(callBackProc); |
| sample_bits = spec->size / spec->samples / spec->channels * 8; |
| |
| #ifdef DEBUG_AUDIO |
| fprintf(stderr, |
| "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", |
| spec->format, spec->channels, sample_bits, spec->freq); |
| #endif /* DEBUG_AUDIO */ |
| |
| header.numChannels = spec->channels; |
| header.sampleSize = sample_bits; |
| header.sampleRate = spec->freq << 16; |
| header.numFrames = spec->samples; |
| header.encode = cmpSH; |
| |
| /* Note that we install the 16bitLittleEndian Converter if needed. */ |
| if (spec->format == 0x8010) { |
| header.compressionID = fixedCompression; |
| header.format = k16BitLittleEndianFormat; |
| } |
| |
| /* allocate 2 buffers */ |
| for (i = 0; i < 2; i++) { |
| buffer[i] = (UInt8 *) malloc(sizeof(UInt8) * spec->size); |
| if (buffer[i] == NULL) { |
| SDL_OutOfMemory(); |
| return (-1); |
| } |
| memset(buffer[i], 0, spec->size); |
| } |
| |
| /* Create the sound manager channel */ |
| channel = (SndChannelPtr) SDL_malloc(sizeof(*channel)); |
| if (channel == NULL) { |
| SDL_OutOfMemory(); |
| return (-1); |
| } |
| if (spec->channels >= 2) { |
| initOptions = initStereo; |
| } else { |
| initOptions = initMono; |
| } |
| channel->userInfo = (long) this; |
| channel->qLength = 128; |
| if (SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr) { |
| SDL_SetError("Unable to create audio channel"); |
| SDL_free(channel); |
| channel = NULL; |
| return (-1); |
| } |
| |
| /* start playback */ |
| { |
| SndCommand cmd; |
| cmd.cmd = callBackCmd; |
| cmd.param2 = 0; |
| running = 1; |
| SndDoCommand(channel, &cmd, 0); |
| } |
| |
| return 1; |
| } |
| |
| static void |
| Mac_CloseAudio(_THIS) |
| { |
| |
| int i; |
| |
| running = 0; |
| |
| if (channel) { |
| SndDisposeChannel(channel, true); |
| channel = NULL; |
| } |
| |
| for (i = 0; i < 2; ++i) { |
| if (buffer[i]) { |
| SDL_free(buffer[i]); |
| buffer[i] = NULL; |
| } |
| } |
| } |
| |
| #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
| |
| static void |
| Mac_LockAudio(_THIS) |
| { |
| /* no-op. */ |
| } |
| |
| static void |
| Mac_UnlockAudio(_THIS) |
| { |
| /* no-op. */ |
| } |
| |
| |
| /* This function is called by Sound Manager when it has exhausted one of |
| the buffers, so we'll zero it to silence and fill it with audio if |
| we're not paused. |
| */ |
| static pascal void |
| sndDoubleBackProc(SndChannelPtr chan, SndDoubleBufferPtr newbuf) |
| { |
| SDL_AudioDevice *audio = (SDL_AudioDevice *) newbuf->dbUserInfo[0]; |
| |
| /* If audio is quitting, don't do anything */ |
| if (!audio->enabled) { |
| return; |
| } |
| memset(newbuf->dbSoundData, 0, audio->spec.size); |
| newbuf->dbNumFrames = audio->spec.samples; |
| if (!audio->paused) { |
| if (audio->convert.needed) { |
| audio->spec.callback(audio->spec.userdata, |
| (Uint8 *) audio->convert.buf, |
| audio->convert.len); |
| SDL_ConvertAudio(&audio->convert); |
| #if 0 |
| if (audio->convert.len_cvt != audio->spec.size) { |
| /* Uh oh... probably crashes here */ ; |
| } |
| #endif |
| SDL_memcpy(newbuf->dbSoundData, audio->convert.buf, |
| audio->convert.len_cvt); |
| } else { |
| audio->spec.callback(audio->spec.userdata, |
| (Uint8 *) newbuf->dbSoundData, |
| audio->spec.size); |
| } |
| } |
| newbuf->dbFlags |= dbBufferReady; |
| } |
| |
| static int |
| DoubleBufferAudio_Available(void) |
| { |
| int available; |
| NumVersion sndversion; |
| long response; |
| |
| available = 0; |
| sndversion = SndSoundManagerVersion(); |
| if (sndversion.majorRev >= 3) { |
| if (Gestalt(gestaltSoundAttr, &response) == noErr) { |
| if ((response & (1 << gestaltSndPlayDoubleBuffer))) { |
| available = 1; |
| } |
| } |
| } else { |
| if (Gestalt(gestaltSoundAttr, &response) == noErr) { |
| if ((response & (1 << gestaltHasASC))) { |
| available = 1; |
| } |
| } |
| } |
| return (available); |
| } |
| |
| static void |
| Mac_CloseAudio(_THIS) |
| { |
| int i; |
| |
| if (channel != NULL) { |
| /* Clean up the audio channel */ |
| SndDisposeChannel(channel, true); |
| channel = NULL; |
| } |
| for (i = 0; i < 2; ++i) { |
| if (audio_buf[i]) { |
| SDL_free(audio_buf[i]); |
| audio_buf[i] = NULL; |
| } |
| } |
| } |
| |
| static int |
| Mac_OpenAudio(_THIS, SDL_AudioSpec * spec) |
| { |
| SndDoubleBufferHeader2 audio_dbh; |
| int i; |
| long initOptions; |
| int sample_bits; |
| SndDoubleBackUPP doubleBackProc; |
| |
| /* Check to make sure double-buffered audio is available */ |
| if (!DoubleBufferAudio_Available()) { |
| SDL_SetError("Sound manager doesn't support double-buffering"); |
| return (-1); |
| } |
| |
| /* Very few conversions are required, but... */ |
| switch (spec->format) { |
| case AUDIO_S8: |
| spec->format = AUDIO_U8; |
| break; |
| case AUDIO_U16LSB: |
| spec->format = AUDIO_S16LSB; |
| break; |
| case AUDIO_U16MSB: |
| spec->format = AUDIO_S16MSB; |
| break; |
| } |
| SDL_CalculateAudioSpec(spec); |
| |
| /* initialize the double-back header */ |
| SDL_memset(&audio_dbh, 0, sizeof(audio_dbh)); |
| doubleBackProc = NewSndDoubleBackProc(sndDoubleBackProc); |
| sample_bits = spec->size / spec->samples / spec->channels * 8; |
| |
| audio_dbh.dbhNumChannels = spec->channels; |
| audio_dbh.dbhSampleSize = sample_bits; |
| audio_dbh.dbhCompressionID = 0; |
| audio_dbh.dbhPacketSize = 0; |
| audio_dbh.dbhSampleRate = spec->freq << 16; |
| audio_dbh.dbhDoubleBack = doubleBackProc; |
| audio_dbh.dbhFormat = 0; |
| |
| /* Note that we install the 16bitLittleEndian Converter if needed. */ |
| if (spec->format == 0x8010) { |
| audio_dbh.dbhCompressionID = fixedCompression; |
| audio_dbh.dbhFormat = k16BitLittleEndianFormat; |
| } |
| |
| /* allocate the 2 double-back buffers */ |
| for (i = 0; i < 2; ++i) { |
| audio_buf[i] = SDL_calloc(1, sizeof(SndDoubleBuffer) + spec->size); |
| if (audio_buf[i] == NULL) { |
| SDL_OutOfMemory(); |
| return (-1); |
| } |
| audio_buf[i]->dbNumFrames = spec->samples; |
| audio_buf[i]->dbFlags = dbBufferReady; |
| audio_buf[i]->dbUserInfo[0] = (long) this; |
| audio_dbh.dbhBufferPtr[i] = audio_buf[i]; |
| } |
| |
| /* Create the sound manager channel */ |
| channel = (SndChannelPtr) SDL_malloc(sizeof(*channel)); |
| if (channel == NULL) { |
| SDL_OutOfMemory(); |
| return (-1); |
| } |
| if (spec->channels >= 2) { |
| initOptions = initStereo; |
| } else { |
| initOptions = initMono; |
| } |
| channel->userInfo = 0; |
| channel->qLength = 128; |
| if (SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr) { |
| SDL_SetError("Unable to create audio channel"); |
| SDL_free(channel); |
| channel = NULL; |
| return (-1); |
| } |
| |
| /* Start playback */ |
| if (SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr) & audio_dbh) |
| != noErr) { |
| SDL_SetError("Unable to play double buffered audio"); |
| return (-1); |
| } |
| |
| return 1; |
| } |
| |
| #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
| /* vi: set ts=4 sw=4 expandtab: */ |
