Initial submission of the PCem-Experimental source code.

src/sound_resid.cc

@@ -0,0 +1,108 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "resid-fp/sid.h"
+#include "sound_resid.h"
+
+typedef struct psid_t
+{
+        /* resid sid implementation */
+        SIDFP *sid;
+        int16_t last_sample;
+} psid_t;
+
+psid_t *psid;
+
+void *sid_init()
+{
+//        psid_t *psid;
+        int c;
+        sampling_method method=SAMPLE_INTERPOLATE;
+        float cycles_per_sec = 14318180.0 / 16.0;
+        
+        psid = new psid_t;
+//        psid = (psid_t *)malloc(sizeof(sound_t));
+        psid->sid = new SIDFP;
+        
+        psid->sid->set_chip_model(MOS8580FP);
+        
+        psid->sid->set_voice_nonlinearity(1.0f);
+        psid->sid->get_filter().set_distortion_properties(0.f, 0.f, 0.f);
+        psid->sid->get_filter().set_type4_properties(6.55f, 20.0f);
+
+        psid->sid->enable_filter(true);
+        psid->sid->enable_external_filter(true);
+
+        psid->sid->reset();
+        
+        for (c=0;c<32;c++)
+                psid->sid->write(c,0);
+                
+        if (!psid->sid->set_sampling_parameters((float)cycles_per_sec, method,
+                                            (float)48000, 0.9*48000.0/2.0))
+                                            {
+  //                                                      printf("reSID failed!\n");
+                                                }
+
+        psid->sid->set_chip_model(MOS6581FP);
+        psid->sid->set_voice_nonlinearity(0.96f);
+        psid->sid->get_filter().set_distortion_properties(3.7e-3f, 2048.f, 1.2e-4f);
+
+        psid->sid->input(0);
+        psid->sid->get_filter().set_type3_properties(1.33e6f, 2.2e9f, 1.0056f, 7e3f);
+
+        return (void *)psid;
+}
+
+void sid_close(void *p)
+{
+//        psid_t *psid = (psid_t *)p;
+        delete psid->sid;
+//        free(psid);
+}
+
+void sid_reset(void *p)
+{
+//        psid_t *psid = (psid_t *)p;
+        int c;
+        
+        psid->sid->reset();
+
+        for (c = 0; c < 32; c++)
+                psid->sid->write(c, 0);
+}
+
+
+uint8_t sid_read(uint16_t addr, void *p)
+{
+//        psid_t *psid = (psid_t *)p;
+        
+        return psid->sid->read(addr & 0x1f);
+//        return 0xFF;
+}
+
+void sid_write(uint16_t addr, uint8_t val, void *p)
+{
+//        psid_t *psid = (psid_t *)p;
+        
+        psid->sid->write(addr & 0x1f,val);
+}
+
+#define CLOCK_DELTA(n) (int)(((14318180.0 * n) / 16.0) / 48000.0)
+
+static void fillbuf2(int& count, int16_t *buf, int len)
+{
+        int c;
+        c = psid->sid->clock(count, buf, len, 1);
+        if (!c)
+                *buf = psid->last_sample;
+        psid->last_sample = *buf;
+}
+void sid_fillbuf(int16_t *buf, int len, void *p)
+{
+//        psid_t *psid = (psid_t *)p;
+        int x = CLOCK_DELTA(len);
+        
+        fillbuf2(x, buf, len);
+}