Support LV2 log trace messages

[ardour.git] / libs / ardour / ardour / chan_count.h

diff --git a/libs/ardour/ardour/chan_count.h b/libs/ardour/ardour/chan_count.h
index 11fb6fea9dd32a6f35b34bc3d9ec6824ee9d3f08..b5699b6743b34743b0e1a84f849baa4f6a482861 100644 (file)
--- a/libs/ardour/ardour/chan_count.h
+++ b/libs/ardour/ardour/chan_count.h
@@ -26,6 +26,10 @@
 #include "pbd/xml++.h"
 #include "ardour/data_type.h"
 
+#ifdef INFINITE
+#undef INFINITE
+#endif
+
 namespace ARDOUR {
 
 
@@ -39,29 +43,56 @@ public:
        ChanCount(const XMLNode& node);
        ChanCount() { reset(); }
 
-       // Convenience constructor for making single-typed streams (stereo, mono, etc)
-       ChanCount(DataType type, uint32_t channels) {
+       /** Convenience constructor for making single-typed streams (mono, stereo, midi, etc)
+        * @param type data type
+        * @param count number of channels
+        */
+       ChanCount(DataType type, uint32_t count) {
                reset();
-               set(type, channels);
+               set(type, count);
        }
 
+       /** zero count of all data types */
        void reset() {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        _counts[*t] = 0;
                }
        }
 
+       /** set channel count for given type
+        * @param type data type
+        * @param count number of channels
+        */
        void     set(DataType t, uint32_t count) { assert(t != DataType::NIL); _counts[t] = count; }
+       /** query channel count for given type
+        * @param type data type
+        * @returns channel count for given type
+        */
        uint32_t get(DataType t) const { assert(t != DataType::NIL); return _counts[t]; }
 
        inline uint32_t n (DataType t) const { return _counts[t]; }
 
+       /** query number of audio channels
+        * @returns number of audio channels
+        */
        inline uint32_t n_audio() const { return _counts[DataType::AUDIO]; }
+       /** set number of audio channels
+        * @param a number of audio channels
+        */
        inline void set_audio(uint32_t a) { _counts[DataType::AUDIO] = a; }
 
+       /** query number of midi channels
+        * @returns number of midi channels
+        */
        inline uint32_t n_midi()  const { return _counts[DataType::MIDI]; }
+       /** set number of audio channels
+        * @param m number of midi channels
+        */
        inline void set_midi(uint32_t m) { _counts[DataType::MIDI] = m; }
 
+       /** query total channel count of all data types
+        * @returns total channel count (audio + midi)
+        */
        uint32_t n_total() const {
                uint32_t ret = 0;
                for (uint32_t i=0; i < DataType::num_types; ++i)
@@ -116,6 +147,39 @@ public:
                return ret;
        }
 
+       /** underflow safe subtraction */
+       ChanCount operator-(const ChanCount& other) const {
+               ChanCount ret;
+               for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+                       if (get(*t) < other.get(*t)) {
+                               ret.set(*t, 0);
+                       } else {
+                               ret.set(*t, get(*t) - other.get(*t));
+                       }
+               }
+               return ret;
+       }
+
+       ChanCount operator*(const unsigned int factor) const {
+               ChanCount ret;
+               for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+                       ret.set(*t, get(*t) * factor );
+               }
+               return ret;
+       }
+
+       /** underflow safe subtraction */
+       ChanCount& operator-=(const ChanCount& other) {
+               for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+                       if (_counts[*t] < other._counts[*t]) {
+                               _counts[*t] = 0;
+                       } else {
+                               _counts[*t] -= other._counts[*t];
+                       }
+               }
+               return *this;
+       }
+
        ChanCount& operator+=(const ChanCount& other) {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        _counts[*t] += other._counts[*t];
@@ -150,7 +214,7 @@ private:
 
 } // namespace ARDOUR
 
-std::ostream& operator<<(std::ostream& o, const ARDOUR::ChanCount& c);
+LIBARDOUR_API std::ostream& operator<<(std::ostream& o, const ARDOUR::ChanCount& c);
 
 #endif // __ardour_chan_count_h__