// setup conversion from Squeak to device frame format, or vice-versa.
// requires: stereo for output, stereo or mono for input.
//
static int Stream_setFormat(Stream *s, int frameCount, int sampleRate, int stereo)
{
int nChannels= 1 + stereo;
AudioStreamBasicDescription imgFmt, devFmt;
UInt32 sz= sizeof(devFmt);
if (0 == s->direction) nChannels= 2; // insist
if (checkError(AudioDeviceGetProperty(s->id, 0, s->direction,
kAudioDevicePropertyStreamFormat,
&sz, &devFmt),
"GetProperty", "StreamFormat"))
return 0;
debugf("stream %p[%d] device format:\n", s, s->direction); dumpFormat(&devFmt);
imgFmt.mSampleRate = sampleRate;
imgFmt.mFormatID = kAudioFormatLinearPCM;
#if defined(WORDS_BIGENDIAN)
imgFmt.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsBigEndian;
#else
imgFmt.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
#endif
imgFmt.mBytesPerPacket = SqueakFrameSize / (3 - nChannels);
imgFmt.mFramesPerPacket = 1;
imgFmt.mBytesPerFrame = SqueakFrameSize / (3 - nChannels);
imgFmt.mChannelsPerFrame = nChannels;
imgFmt.mBitsPerChannel = 16;
debugf("stream %p[%d] image format:\n", s, s->direction); dumpFormat(&imgFmt);
if (s->direction) // input
{
if (checkError(AudioConverterNew(&devFmt, &imgFmt, &s->converter), "AudioConverter", "New"))
return 0;
sz= sizeof(s->cvtBufSize);
s->cvtBufSize= 512 * devFmt.mBytesPerFrame;
if (checkError(AudioConverterGetProperty(s->converter, kAudioConverterPropertyCalculateOutputBufferSize,
&sz, &s->cvtBufSize),
"GetProperty", "OutputBufferSize"))
return 0;
}
else // output
{
if (checkError(AudioConverterNew(&imgFmt, &devFmt, &s->converter), "AudioConverter", "New"))
return 0;
}
s->channels= nChannels;
s->sampleRate= sampleRate;
s->imgBufSize= SqueakFrameSize * nChannels * frameCount;
frameCount= max(frameCount, 512 * sampleRate / devFmt.mSampleRate);
s->buffer= Buffer_new((s->direction ? DeviceFrameSize : SqueakFrameSize) * nChannels * frameCount * 2);
debugf("stream %p[%d] sound buffer size %d/%d (%d)\n", s, s->direction, s->imgBufSize, s->buffer->size, frameCount);
return 1;
}
void ProgramDeclaration::dump(FILE* f, int depth)
{
fprintf(f, "ProgramDeclaration(\n");
depth++;
dumpFormat(f, depth, "program = ");
dumpNode<Program>(program, f, depth);
fprintf(f, "\n");
depth--;
dumpFormat(f, depth, ")");
}
void AliasDeclaration::dump(FILE* f, int depth)
{
fprintf(f, "AliasDeclaration(\n");
depth++;
dumpFormat(f, depth, "identifier = ");
dumpNode<Identifier>(identifier, f, depth);
fprintf(f, ",\n");
dumpFormat(f, depth, "type = ");
dumpNode<TypeDefinition>(type, f, depth);
fprintf(f, "\n");
depth--;
dumpFormat(f, depth, ")");
}
void VariableDeclaration::dump(FILE* f, int depth)
{
fprintf(f, "VariableDeclaration(\n");
depth++;
dumpFormat(f, depth, "list = ");
dumpNode<IdentifierList>(list, f, depth);
fprintf(f, ",\n");
dumpFormat(f, depth, "type = ");
dumpNode<TypeDefinition>(type, f, depth);
fprintf(f, "\n");
depth--;
dumpFormat(f, depth, ")");
}
void ConstantDeclaration::dump(FILE* f, int depth)
{
fprintf(f, "ConstantDeclaration(\n");
depth++;
dumpFormat(f, depth, "identifier = ");
dumpNode<Identifier>(identifier, f, depth);
fprintf(f, ",\n");
dumpFormat(f, depth, "expression = ");
dumpNode<Expression>(expression, f, depth);
fprintf(f, "\n");
depth--;
dumpFormat(f, depth, ")");
}
int QVideoDecoder::getVideoLengthMs()
{
if(!isOk())
return -1;
int secs = pFormatCtx->duration / AV_TIME_BASE;
int us = pFormatCtx->duration % AV_TIME_BASE;
int l = secs*1000 + us/1000;
dumpFormat(pFormatCtx,videoStream,"test video",0);
return l;
}
