Merge pull request #58 from jpcima/chipbase32bit

general 32bit generator methods, like OPNMIDI

1 files changed, 30 insertions, 0 deletions

diff --git a/src/chips/opl_chip_base.cpp b/src/chips/opl_chip_base.cpp
index 65d4b73..4a7c4f5 100644
--- a/src/chips/opl_chip_base.cpp
+++ b/src/chips/opl_chip_base.cpp
@@ -20,3 +20,33 @@ void OPLChipBase::reset(uint32_t rate)
 {
     setRate(rate);
 }
+
+int OPLChipBase::generate32(int32_t *output, size_t frames)
+{
+    enum { maxFramesAtOnce = 256 };
+    int16_t temp[2 * maxFramesAtOnce];
+    for(size_t left = frames; left > 0;) {
+        size_t count = (left < maxFramesAtOnce) ? left : maxFramesAtOnce;
+        generate(temp, count);
+        for(size_t i = 0; i < 2 * count; ++i)
+            output[i] = temp[i];
+        left -= count;
+        output += 2 * count;
+    }
+    return (int)frames;
+}
+
+int OPLChipBase::generateAndMix32(int32_t *output, size_t frames)
+{
+    enum { maxFramesAtOnce = 256 };
+    int16_t temp[2 * maxFramesAtOnce];
+    for(size_t left = frames; left > 0;) {
+        size_t count = (left < maxFramesAtOnce) ? left : maxFramesAtOnce;
+        generate(temp, count);
+        for(size_t i = 0; i < 2 * count; ++i)
+            output[i] += temp[i];
+        left -= count;
+        output += 2 * count;
+    }
+    return (int)frames;
+}