Initial submission of the PCem-Experimental source code.

2016-06-26 00:34:39 +02:00
parent 09d7c4384f
commit fd2a5bc9f5
610 changed files with 184352 additions and 0 deletions
--- a/src/sound_speaker.c
+++ b/src/sound_speaker.c
@@ -0,0 +1,59 @@
+#include "ibm.h"
+#include "sound.h"
+#include "sound_speaker.h"
+
+int speaker_mute = 0;
+
+static int16_t speaker_buffer[SOUNDBUFLEN];
+
+static int speaker_pos = 0;
+
+int speaker_gated = 0;
+int speaker_enable = 0, was_speaker_enable = 0;
+
+void speaker_update()
+{
+        int16_t val;
+        
+//        printf("SPeaker - %i %i %i %02X\n",speakval,gated,speakon,pit.m[2]);
+        for (; speaker_pos < sound_pos_global; speaker_pos++)
+        {
+                if (speaker_gated && was_speaker_enable)
+                {
+                        if (!pit.m[2] || pit.m[2]==4)
+                                val = speakval;
+                        else if (pit.l[2] < 0x40)
+                                val = 0xa00;
+                        else 
+                                val = speakon ? 0x1400 : 0;
+                }
+                else
+                        val = was_speaker_enable ? 0x1400 : 0;
+
+                if (!speaker_enable)
+                        was_speaker_enable = 0;
+
+                speaker_buffer[speaker_pos] = val;
+        }
+}
+
+static void speaker_get_buffer(int32_t *buffer, int len, void *p)
+{
+        int c;
+
+        speaker_update();
+        
+        if (!speaker_mute)
+        {
+                for (c = 0; c < len * 2; c++)
+                        buffer[c] += speaker_buffer[c >> 1];
+        }
+
+        speaker_pos = 0;
+}
+
+void speaker_init()
+{
+        sound_add_handler(speaker_get_buffer, NULL);
+        speaker_mute = 0;
+}