/*
* PortMixer
* Mac OS 9 implementation
*
* Copyright (c) 2002
*
* Written by Dominic Mazzoni
*
* PortMixer is intended to work side-by-side with PortAudio,
* the Portable Real-Time Audio Library by Ross Bencina and
* Phil Burk.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <stdlib.h>
#include <string.h>
#include "portaudio.h"
#include "pa_host.h"
#include "portmixer.h"
#define PA_MAX_NUM_HOST_BUFFERS (16) /* Do not exceed!! */
typedef struct MultiBuffer
{
char *buffers[PA_MAX_NUM_HOST_BUFFERS];
int numBuffers;
int nextWrite;
int nextRead;
}
MultiBuffer;
/* Define structure to contain all Macintosh specific data. */
typedef struct PaHostSoundControl
{
UInt64 pahsc_EntryCount;
double pahsc_InverseMicrosPerHostBuffer; /* 1/Microseconds of real-time audio per user buffer. */
/* Use char instead of Boolean for atomic operation. */
volatile char pahsc_IsRecording; /* Recording in progress. Set by foreground. Cleared by background. */
volatile char pahsc_StopRecording; /* Signal sent to background. */
volatile char pahsc_IfInsideCallback;
/* Input */
SPB pahsc_InputParams;
SICompletionUPP pahsc_InputCompletionProc;
MultiBuffer pahsc_InputMultiBuffer;
int32 pahsc_BytesPerInputHostBuffer;
int32 pahsc_InputRefNum;
/* Output */
CmpSoundHeader pahsc_SoundHeaders[PA_MAX_NUM_HOST_BUFFERS];
int32 pahsc_BytesPerOutputHostBuffer;
SndChannelPtr pahsc_Channel;
SndCallBackUPP pahsc_OutputCompletionProc;
int32 pahsc_NumOutsQueued;
int32 pahsc_NumOutsPlayed;
PaTimestamp pahsc_NumFramesDone;
UInt64 pahsc_WhenFramesDoneIncremented;
/* Init Time -------------- */
int32 pahsc_NumHostBuffers;
int32 pahsc_FramesPerHostBuffer;
int32 pahsc_UserBuffersPerHostBuffer;
int32 pahsc_MinFramesPerHostBuffer; /* Can vary depending on virtual memory usage. */
}
PaHostSoundControl;
typedef struct PxSource
{
char name[256];
} PxSource;
typedef struct PxInfo
{
SPB *input;
int32 inputRefNum;
SndChannelPtr output;
int32 numSources;
PxSource *sources;
} PxInfo;
int Px_GetNumMixers( void *pa_stream )
{
return 0;
}
const char *Px_GetMixerName( void *pa_stream, int index )
{
return "Mac Sound Manager";
}
PxMixer *Px_OpenMixer( void *pa_stream, int index )
{
PxInfo *info;
internalPortAudioStream *past;
PaHostSoundControl *macInfo;
OSErr err;
int i, j;
Handle h;
unsigned char *data;
info = (PxInfo *)malloc(sizeof(PxInfo));
past = (internalPortAudioStream *) pa_stream;
macInfo = (PaHostSoundControl *) past->past_DeviceData;
info->input = &macInfo->pahsc_InputParams;
info->inputRefNum = macInfo->pahsc_InputRefNum;
info->output = macInfo->pahsc_Channel;
info->numSources = 0;
info->sources = NULL;
err = SPBGetDeviceInfo (info->inputRefNum, siInputSourceNames, &h);
if (err)
return (PxMixer *)info;
HLock(h);
HNoPurge(h);
data = (unsigned char *)*h;
info->numSources = ((short *)data)[0];
if (info->numSources <= 0 || info->numSources > 50) {
HUnlock(h);
return (PxMixer *)info;
}
info->sources = (PxSource *)malloc(info->numSources * sizeof(PxSource));
data += 2;
for(i=0; i<info->numSources; i++) {
int len = *data++;
if (len > 63) {
info->numSources = 0;
free(info->sources);
info->sources = NULL;
HUnlock(h);
return (PxMixer *)info;
}
for(j=0; j<len; j++)
info->sources[i].name[j] = *data++;
info->sources[i].name[len] = 0;
}
HUnlock(h);
return (PxMixer *)info;
}
/*
Px_CloseMixer() closes a mixer opened using Px_OpenMixer and frees any
memory associated with it.
*/
void Px_CloseMixer(PxMixer *mixer)
{
PxInfo *info = (PxInfo *)mixer;
if (info->sources)
free(info->sources);
free(info);
}
/*
Master (output) volume
*/
PxVolume Px_GetMasterVolume( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
return 0.0;
}
void Px_SetMasterVolume( PxMixer *mixer, PxVolume volume )
{
PxInfo *info = (PxInfo *)mixer;
}
/*
PCM output volume
*/
int Px_SupportsPCMOutputVolume( PxMixer* mixer )
{
return 1 ;
}
PxVolume Px_GetPCMOutputVolume( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
OSErr err;
long packedVol;
SndCommand cmd;
cmd.cmd = getVolumeCmd;
cmd.param1 = 0;
cmd.param2 = (long)&packedVol;
err = SndDoImmediate(info->output, &cmd);
if (err)
return 0.0;
return ((packedVol & 0xFFFF) + ((packedVol & 0xFFFF0000) >> 16) / 2.0) / 256.0;
}
void Px_SetPCMOutputVolume( PxMixer *mixer, PxVolume volume )
{
PxInfo *info = (PxInfo *)mixer;
OSErr err;
long packedVol;
SndCommand cmd;
packedVol = (unsigned long)volume * 256.0;
packedVol += (packedVol << 16);
cmd.cmd = volumeCmd;
cmd.param1 = 0;
cmd.param2 = packedVol;
err = SndDoImmediate(info->output, &cmd);
}
/*
All output volumes
*/
int Px_GetNumOutputVolumes( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
return 0;
}
const char *Px_GetOutputVolumeName( PxMixer *mixer, int i )
{
PxInfo *info = (PxInfo *)mixer;
return NULL;
}
PxVolume Px_GetOutputVolume( PxMixer *mixer, int i )
{
PxInfo *info = (PxInfo *)mixer;
return NULL;
}
void Px_SetOutputVolume( PxMixer *mixer, int i, PxVolume volume )
{
PxInfo *info = (PxInfo *)mixer;
}
/*
Input sources
*/
int Px_GetNumInputSources( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
return info->numSources;
}
const char *Px_GetInputSourceName( PxMixer *mixer, int i)
{
PxInfo *info = (PxInfo *)mixer;
if (i >= 0 && i < info->numSources)
return info->sources[i].name;
else
return "";
}
int Px_GetCurrentInputSource( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
short selected;
OSErr err;
err = SPBGetDeviceInfo (info->inputRefNum, siInputSource, &selected);
if (err)
return 0;
return selected - 1;
}
void Px_SetCurrentInputSource( PxMixer *mixer, int i )
{
PxInfo *info = (PxInfo *)mixer;
short selected = i+1;
OSErr err;
err = SPBSetDeviceInfo (info->inputRefNum, siInputSource, &selected);
}
/*
Input volume
*/
PxVolume Px_GetInputVolume( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
Fixed fixedGain;
PxVolume vol;
OSErr err;
if (info->input) {
err = SPBGetDeviceInfo(info->inputRefNum, siInputGain, (Ptr)&fixedGain);
if (err)
return 0.0;
vol = (fixedGain / 65536.0) - 0.5;
return vol;
}
return 0.0;
}
void Px_SetInputVolume( PxMixer *mixer, PxVolume volume )
{
PxInfo *info = (PxInfo *)mixer;
Fixed fixedGain;
OSErr err;
if (info->input) {
fixedGain = (Fixed)((volume + 0.5) * 65536.0);
err = SPBSetDeviceInfo(info->inputRefNum, siInputGain, (Ptr)&fixedGain);
}
}
/*
Balance
*/
int Px_SupportsOutputBalance( PxMixer *mixer )
{
return 0;
}
PxBalance Px_GetOutputBalance( PxMixer *mixer )
{
return 0.0;
}
void Px_SetOutputBalance( PxMixer *mixer, PxBalance balance )
{
}
/*
Playthrough
*/
int Px_SupportsPlaythrough( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
return (info->input != NULL);
}
PxVolume Px_GetPlaythrough( PxMixer *mixer )
{
PxInfo *info = (PxInfo *)mixer;
OSErr err;
short level;
err = SPBGetDeviceInfo(info->inputRefNum, siPlayThruOnOff, (Ptr)&level);
if (err)
return 0.0;
if (level < 0)
level = 0;
if (level > 7)
level = 7;
return (PxVolume)(level / 7.0);
}
void Px_SetPlaythrough( PxMixer *mixer, PxVolume volume )
{
PxInfo *info = (PxInfo *)mixer;
OSErr err;
short level = (int)(volume * 7.0 + 0.5);
err = SPBSetDeviceInfo(info->inputRefNum, siPlayThruOnOff, (Ptr)&level);
}