Add live shifter to C API

rubberband/RubberBandLiveShifter.h

@@ -102,7 +102,7 @@ public:
         OptionFormantPreserved     = 0x01000000,
 
         OptionChannelsApart        = 0x00000000,
-        OptionChannelsTogether     = 0x10000000,
+        OptionChannelsTogether     = 0x10000000
 
         // n.b. Options is int, so we must stop before 0x80000000
     };

rubberband/rubberband-c.h

@@ -48,11 +48,13 @@ extern "C" {
  * This is a C-linkage interface to the Rubber Band time stretcher.
  * 
  * This is a wrapper interface: the primary interface is in C++ and is
- * defined and documented in RubberBandStretcher.h.  The library
+ * defined and documented in RubberBandStretcher.h and
- * itself is implemented in C++, and requires C++ standard library
+ * RubberBandLiveShifter.h.  The library itself is implemented in C++,
- * support even when using the C-linkage API.
+ * and requires C++ standard library support even when using the
+ * C-linkage API.
  *
- * Please see RubberBandStretcher.h for documentation.
+ * Please see RubberBandStretcher.h and RubberBandLiveShifter.h for
+ * documentation.
  *
  * If you are writing to the C++ API, do not include this header.
  */
@@ -159,6 +161,52 @@ RB_EXTERN void rubberband_calculate_stretch(RubberBandState);
 RB_EXTERN void rubberband_set_debug_level(RubberBandState, int level);
 RB_EXTERN void rubberband_set_default_debug_level(int level);
 
+
+enum RubberBandLiveOption {
+
+    RubberBandLiveOptionWindowShort      = 0x00000000,
+    RubberBandLiveOptionWindowMedium     = 0x00100000,
+
+    RubberBandLiveOptionFormantShifted   = 0x00000000,
+    RubberBandLiveOptionFormantPreserved = 0x01000000,
+
+    RubberBandLiveOptionChannelsApart    = 0x00000000,
+    RubberBandLiveOptionChannelsTogether = 0x10000000
+};
+
+typedef int RubberBandLiveOptions;
+
+struct RubberBandLiveState_;
+typedef struct RubberBandLiveState_ *RubberBandLiveState;
+
+RB_EXTERN RubberBandLiveState rubberband_live_new(unsigned int sampleRate,
+                                                  unsigned int channels,
+                                                  RubberBandOptions options);
+
+RB_EXTERN void rubberband_live_delete(RubberBandLiveState);
+
+RB_EXTERN void rubberband_live_reset(RubberBandLiveState);
+
+RB_EXTERN void rubberband_live_set_pitch_scale(RubberBandLiveState, double scale);
+RB_EXTERN double rubberband_live_get_pitch_scale(const RubberBandLiveState);
+
+RB_EXTERN void rubberband_live_set_formant_scale(RubberBandLiveState, double scale);
+RB_EXTERN double rubberband_live_get_formant_scale(const RubberBandLiveState);
+
+RB_EXTERN unsigned int rubberband_live_get_start_delay(const RubberBandLiveState);
+
+RB_EXTERN void rubberband_live_set_formant_option(RubberBandLiveState, RubberBandOptions options);
+
+RB_EXTERN unsigned int rubberband_live_get_block_size(RubberBandLiveState, RubberBandOptions options);
+
+RB_EXTERN void rubberband_live_shift(RubberBandLiveState, const float *const *input, float *const *output);
+
+RB_EXTERN unsigned int rubberband_live_get_channel_count(const RubberBandLiveState);
+
+RB_EXTERN void rubberband_live_set_debug_level(RubberBandLiveState, int level);
+RB_EXTERN void rubberband_live_set_default_debug_level(int level);
+
+    
 #ifdef __cplusplus
 }
 #endif

src/rubberband-c.cpp

@@ -23,6 +23,7 @@
 
 #include "../rubberband/rubberband-c.h"
 #include "../rubberband/RubberBandStretcher.h"
+#include "../rubberband/RubberBandLiveShifter.h"
 
 struct RubberBandState_
 {
@@ -197,3 +198,78 @@ void rubberband_set_default_debug_level(int level)
     RubberBand::RubberBandStretcher::setDefaultDebugLevel(level);
 }
 
+struct RubberBandLiveState_
+{
+    RubberBand::RubberBandLiveShifter *m_s;
+};
+
+RubberBandLiveState rubberband_live_new(unsigned int sampleRate,
+                                        unsigned int channels,
+                                        RubberBandOptions options)
+{
+    RubberBandLiveState_ *state = new RubberBandLiveState_();
+    state->m_s = new RubberBand::RubberBandLiveShifter
+        (sampleRate, channels, options);
+    return state;
+}
+
+void rubberband_live_delete(RubberBandLiveState state)
+{
+    delete state->m_s;
+    delete state;
+}
+
+void rubberband_live_reset(RubberBandLiveState state)
+{
+    state->m_s->reset();
+}
+
+void rubberband_live_set_pitch_scale(RubberBandLiveState state, double scale)
+{
+    state->m_s->setPitchScale(scale);
+}
+
+double rubberband_live_get_pitch_scale(const RubberBandLiveState state)
+{
+    return state->m_s->getPitchScale();
+}
+
+void rubberband_live_set_formant_scale(RubberBandLiveState state, double scale)
+{
+    state->m_s->setFormantScale(scale);
+}
+
+double rubberband_live_get_formant_scale(const RubberBandLiveState state)
+{
+    return state->m_s->getFormantScale();
+}
+
+unsigned int rubberband_live_get_start_delay(const RubberBandLiveState state) 
+{
+    return (unsigned int)state->m_s->getStartDelay();
+}
+
+void rubberband_live_set_formant_option(RubberBandLiveState state, RubberBandOptions options)
+{
+    state->m_s->setFormantOption(options);
+}
+
+void rubberband_live_shift(RubberBandLiveState state, const float *const *input, float *const *output)
+{
+    state->m_s->shift(input, output);
+}
+
+unsigned int rubberband_live_get_channel_count(const RubberBandLiveState state)
+{
+    return (unsigned int)state->m_s->getChannelCount();
+}
+
+void rubberband_live_set_debug_level(RubberBandLiveState state, int level)
+{
+    state->m_s->setDebugLevel(level);
+}
+
+void rubberband_live_set_default_debug_level(int level)
+{
+    RubberBand::RubberBandStretcher::setDefaultDebugLevel(level);
+}