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Code Issues Releases Wiki Activity

Rearchitect the class hierarchy a little because of a problem Rob Sykes noted to me off-list, where it was using the key and default prefs methods from the base class rather than the descendant, even when those methods were overridden in the descendant.

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Also re-ordered and clarified several comments.
This commit is contained in:
v.audacity
2013-01-11 00:13:48 +00:00
parent 884f3ef01d
commit a08d0503be
3 changed files with 83 additions and 38 deletions
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69
src/Resample.h
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@@ -27,17 +27,9 @@ class Resample
/// the fast method.
//v (The particular method used was previously set by
/// SetFastMethod or SetBestMethod.)
// minFactor and maxFactor
/// specify the range of factors that will be used, if you plan
/// to vary the factor over time. Otherwise set minFactor and
/// maxFactor to the same value for optimized performance.
Resample(const bool useBestMethod)
{
if (useBestMethod)
mMethod = GetBestMethod();
else
mMethod = GetFastMethod();
Resample()
{
mMethod = 0;
mHandle = NULL;
};
virtual ~Resample() {};
@@ -48,27 +40,17 @@ class Resample
// virtual wxString GetResamplingLibraryName() { return _("Resampling disabled."); };
/// Resamplers may have more than one method, offering a
/// tradeoff between speed and quality. This lets you query
/// the various methods available.
static int GetNumMethods() { return 1; };
static wxString GetMethodName(int WXUNUSED(index)) { return _("Resampling disabled."); };
/// tradeoff between speed and quality.
/// Audacity identifies two methods out of all of the choices:
/// a Fast method intended for real-time audio I/O, and a Best
/// method intended for mixing and exporting.
//v (These were previously saved
/// in the preferences when you call Set[Best,Fast]Method.)
int GetFastMethod() { return gPrefs->Read(GetFastMethodKey(), GetFastMethodDefault()); };
int GetBestMethod() { return gPrefs->Read(GetBestMethodKey(), GetBestMethodDefault()); };
//v Currently unused.
// in the preferences when you call Set[Best,Fast]Method.
// Now done with TieChoice() in QualityPrefs.
// Implemented in descendant classes, for class-specificity.)
//static void SetFastMethod(int index);
//static void SetBestMethod(int index);
static const wxString GetFastMethodKey() { return wxT("/Quality/DisabledConverter"); };
static const wxString GetBestMethodKey() { return wxT("/Quality/DisabledConverter"); };
static int GetFastMethodDefault() { return 0; };
static int GetBestMethodDefault() { return 0; };
/** @brief Main processing function. Resamples from the input buffer to the
* output buffer.
*
@@ -144,17 +126,38 @@ class ConstRateResample : public Resample
int *inBufferUsed,
float *outBuffer,
int outBufferLen);
#else
static int GetNumMethods() { return 1; };
static wxString GetMethodName(int WXUNUSED(index)) { return _("Resampling disabled."); };
static const wxString GetFastMethodKey() { return wxT("/Quality/DisabledConverter"); };
static const wxString GetBestMethodKey() { return wxT("/Quality/DisabledConverter"); };
static int GetFastMethodDefault() { return 0; };
static int GetBestMethodDefault() { return 0; };
#endif
protected:
void SetMethod(const bool useBestMethod)
{
if (useBestMethod)
mMethod = gPrefs->Read(GetBestMethodKey(), GetBestMethodDefault());
else
mMethod = gPrefs->Read(GetBestMethodKey(), GetBestMethodDefault());
};
};
class VarRateResample : public Resample
{
public:
// dMinFactor and dMaxFactor specify the range of factors for variable-rate resampling.
VarRateResample(const bool useBestMethod, const double dMinFactor, const double dMaxFactor);
virtual ~VarRateResample();
// Override base class methods only if we actually have a var-rate library.
#if USE_LIBRESAMPLE || USE_LIBSAMPLERATE || USE_LIBSOXR
//vvv Note that we're not actually calling any of these Get* methods
// for var-rate, as the decision was to not allow QualityPrefs for it.
// However the menthods already existed for libresample and libsamplerate,
// so they're now implemented for all, in case we decide to provide prefs.
static int GetNumMethods();
static wxString GetMethodName(int index);
@@ -170,7 +173,23 @@ class VarRateResample : public Resample
int *inBufferUsed,
float *outBuffer,
int outBufferLen);
#else
static int GetNumMethods() { return 1; };
static wxString GetMethodName(int WXUNUSED(index)) { return _("Resampling disabled."); };
static const wxString GetFastMethodKey() { return wxT("/Quality/DisabledConverter"); };
static const wxString GetBestMethodKey() { return wxT("/Quality/DisabledConverter"); };
static int GetFastMethodDefault() { return 0; };
static int GetBestMethodDefault() { return 0; };
#endif
protected:
void SetMethod(const bool useBestMethod)
{
if (useBestMethod)
mMethod = gPrefs->Read(GetBestMethodKey(), GetBestMethodDefault());
else
mMethod = gPrefs->Read(GetBestMethodKey(), GetBestMethodDefault());
};
};
#endif // __AUDACITY_RESAMPLE_H__