/* =========================================================================== Copyright (C) 1999-2005 Id Software, Inc. This file is part of Quake III Arena source code. Quake III Arena source code is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Quake III Arena source code 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Foobar; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA =========================================================================== */ // mac_snddma.c // all other sound mixing is portable #include "../client/snd_local.h" #include #include #include // For 'ri' #include "../renderer/tr_local.h" #import #import static unsigned int submissionChunk; static unsigned int maxMixedSamples; static short *s_mixedSamples; static int s_chunkCount; // number of chunks submitted static qboolean s_isRunning; static AudioDeviceID outputDeviceID; static AudioStreamBasicDescription outputStreamBasicDescription; /* =============== audioDeviceIOProc =============== */ OSStatus audioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData) { int offset; short *samples; unsigned int sampleIndex; float *outBuffer; float scale, temp; offset = ( s_chunkCount * submissionChunk ) % maxMixedSamples; samples = s_mixedSamples + offset; assert(outOutputData->mNumberBuffers == 1); assert(outOutputData->mBuffers[0].mNumberChannels == 2); //assert(outOutputData->mBuffers[0].mDataByteSize == (dma.submission_chunk * sizeof(float))); outBuffer = (float *)outOutputData->mBuffers[0].mData; // If we have run out of samples, return silence if (s_chunkCount * submissionChunk > dma.channels * s_paintedtime) { memset(outBuffer, 0, sizeof(*outBuffer) * dma.submission_chunk); } else { scale = (1.0f / SHRT_MAX); if (outputStreamBasicDescription.mSampleRate == 44100 && dma.speed == 22050) { for (sampleIndex = 0; sampleIndex < dma.submission_chunk; sampleIndex+=2) { // Convert the samples from shorts to floats. Scale the floats to be [-1..1]. temp = samples[sampleIndex + 0] * scale; outBuffer[(sampleIndex<<1)+0] = temp; outBuffer[(sampleIndex<<1)+2] = temp; temp = samples[sampleIndex + 1] * scale; outBuffer[(sampleIndex<<1)+1] = temp; outBuffer[(sampleIndex<<1)+3] = temp; } } else if (outputStreamBasicDescription.mSampleRate == 44100 && dma.speed == 11025) { for (sampleIndex = 0; sampleIndex < dma.submission_chunk; sampleIndex+=4) { // Convert the samples from shorts to floats. Scale the floats to be [-1..1]. temp = samples[sampleIndex + 0] * scale; outBuffer[(sampleIndex<<1)+0] = temp; outBuffer[(sampleIndex<<1)+2] = temp; outBuffer[(sampleIndex<<1)+4] = temp; outBuffer[(sampleIndex<<1)+6] = temp; temp = samples[sampleIndex + 1] * scale; outBuffer[(sampleIndex<<1)+1] = temp; outBuffer[(sampleIndex<<1)+3] = temp; outBuffer[(sampleIndex<<1)+5] = temp; outBuffer[(sampleIndex<<1)+7] = temp; } } else { for (sampleIndex = 0; sampleIndex < dma.submission_chunk; sampleIndex++) { // Convert the samples from shorts to floats. Scale the floats to be [-1..1]. outBuffer[sampleIndex] = samples[sampleIndex] * scale; } } } s_chunkCount++; // this is the next buffer we will submit return 0; } /* =============== S_MakeTestPattern =============== */ void S_MakeTestPattern( void ) { int i; float v; int sample; for ( i = 0 ; i < dma.samples / 2 ; i ++ ) { v = sin( M_PI * 2 * i / 64 ); sample = v * 0x4000; ((short *)dma.buffer)[i*2] = sample; ((short *)dma.buffer)[i*2+1] = sample; } } /* =============== SNDDMA_Init =============== */ qboolean SNDDMA_Init(void) { cvar_t *bufferSize; cvar_t *chunkSize; OSStatus status; UInt32 propertySize, bufferByteCount; if (s_isRunning) return qtrue; chunkSize = ri.Cvar_Get( "s_chunksize", "2048", CVAR_ARCHIVE ); bufferSize = ri.Cvar_Get( "s_buffersize", "16384", CVAR_ARCHIVE ); Com_Printf(" Chunk size = %d\n", chunkSize->integer); Com_Printf("Buffer size = %d\n", bufferSize->integer); if (!chunkSize->integer) ri.Error(ERR_FATAL, "s_chunksize must be non-zero\n"); if (!bufferSize->integer) ri.Error(ERR_FATAL, "s_buffersize must be non-zero\n"); if (chunkSize->integer >= bufferSize->integer) ri.Error(ERR_FATAL, "s_chunksize must be less than s_buffersize\n"); if (bufferSize->integer % chunkSize->integer) ri.Error(ERR_FATAL, "s_buffersize must be an even multiple of s_chunksize\n"); // Get the output device propertySize = sizeof(outputDeviceID); status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &propertySize, &outputDeviceID); if (status) { Com_Printf("AudioHardwareGetProperty returned %d\n", status); return qfalse; } if (outputDeviceID == kAudioDeviceUnknown) { Com_Printf("AudioHardwareGetProperty: outputDeviceID is kAudioDeviceUnknown\n"); return qfalse; } // Configure the output device propertySize = sizeof(bufferByteCount); bufferByteCount = chunkSize->integer * sizeof(float); status = AudioDeviceSetProperty(outputDeviceID, NULL, 0, NO, kAudioDevicePropertyBufferSize, propertySize, &bufferByteCount); if (status) { Com_Printf("AudioDeviceSetProperty: returned %d when setting kAudioDevicePropertyBufferSize to %d\n", status, chunkSize->integer); return qfalse; } propertySize = sizeof(bufferByteCount); status = AudioDeviceGetProperty(outputDeviceID, 0, NO, kAudioDevicePropertyBufferSize, &propertySize, &bufferByteCount); if (status) { Com_Printf("AudioDeviceGetProperty: returned %d when setting kAudioDevicePropertyBufferSize\n", status); return qfalse; } // Print out the device status propertySize = sizeof(outputStreamBasicDescription); status = AudioDeviceGetProperty(outputDeviceID, 0, NO, kAudioDevicePropertyStreamFormat, &propertySize, &outputStreamBasicDescription); if (status) { Com_Printf("AudioDeviceGetProperty: returned %d when getting kAudioDevicePropertyStreamFormat\n", status); return qfalse; } Com_Printf("Hardware format:\n"); Com_Printf(" %f mSampleRate\n", outputStreamBasicDescription.mSampleRate); Com_Printf(" %c%c%c%c mFormatID\n", (outputStreamBasicDescription.mFormatID & 0xff000000) >> 24, (outputStreamBasicDescription.mFormatID & 0x00ff0000) >> 16, (outputStreamBasicDescription.mFormatID & 0x0000ff00) >> 8, (outputStreamBasicDescription.mFormatID & 0x000000ff) >> 0); Com_Printf(" %5d mBytesPerPacket\n", outputStreamBasicDescription.mBytesPerPacket); Com_Printf(" %5d mFramesPerPacket\n", outputStreamBasicDescription.mFramesPerPacket); Com_Printf(" %5d mBytesPerFrame\n", outputStreamBasicDescription.mBytesPerFrame); Com_Printf(" %5d mChannelsPerFrame\n", outputStreamBasicDescription.mChannelsPerFrame); Com_Printf(" %5d mBitsPerChannel\n", outputStreamBasicDescription.mBitsPerChannel); if(outputStreamBasicDescription.mFormatID != kAudioFormatLinearPCM) { Com_Printf("Default Audio Device doesn't support Linear PCM!"); return qfalse; } // Start sound running status = AudioDeviceAddIOProc(outputDeviceID, audioDeviceIOProc, NULL); if (status) { Com_Printf("AudioDeviceAddIOProc: returned %d\n", status); return qfalse; } submissionChunk = chunkSize->integer; if (outputStreamBasicDescription.mSampleRate == 44100) { submissionChunk = chunkSize->integer/2; } maxMixedSamples = bufferSize->integer; s_mixedSamples = calloc(1, sizeof(*s_mixedSamples) * maxMixedSamples); Com_Printf("Chunk Count = %d\n", (maxMixedSamples / submissionChunk)); // Tell the main app what we expect from it dma.samples = maxMixedSamples; dma.submission_chunk = submissionChunk; dma.samplebits = 16; dma.buffer = (byte *)s_mixedSamples; dma.channels = outputStreamBasicDescription.mChannelsPerFrame; dma.speed = 22050; //(unsigned long)outputStreamBasicDescription.mSampleRate; // We haven't enqueued anything yet s_chunkCount = 0; status = AudioDeviceStart(outputDeviceID, audioDeviceIOProc); if (status) { Com_Printf("AudioDeviceStart: returned %d\n", status); return qfalse; } s_isRunning = qtrue; return qtrue; } /* =============== SNDDMA_GetBufferDuration =============== */ float SNDDMA_GetBufferDuration(void) { return (float)dma.samples / (float)(dma.channels * dma.speed); } /* =============== SNDDMA_GetDMAPos =============== */ int SNDDMA_GetDMAPos(void) { return s_chunkCount * dma.submission_chunk; } /* =============== SNDDMA_Shutdown =============== */ void SNDDMA_Shutdown(void) { OSStatus status; if (!s_isRunning) return; status = AudioDeviceStop(outputDeviceID, audioDeviceIOProc); if (status) { Com_Printf("AudioDeviceStop: returned %d\n", status); return; } s_isRunning = qfalse; status = AudioDeviceRemoveIOProc(outputDeviceID, audioDeviceIOProc); if (status) { Com_Printf("AudioDeviceRemoveIOProc: returned %d\n", status); return; } free(s_mixedSamples); s_mixedSamples = NULL; dma.samples = NULL; } /* =============== SNDDMA_BeginPainting =============== */ void SNDDMA_BeginPainting(void) { } /* =============== SNDDMA_Submit =============== */ void SNDDMA_Submit(void) { }