amalgamation

[picodrive.git] / Pico / cd / pcm.c

diff --git a/Pico/cd/pcm.c b/Pico/cd/pcm.c
index 2b818e0..6ac493a 100644 (file)
--- a/Pico/cd/pcm.c
+++ b/Pico/cd/pcm.c
@@ -1,9 +1,13 @@
+// Emulation routines for the RF5C164 PCM chip.
+// Based on Gens code by Stéphane Dallongeville
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas
+
 #include "../PicoInt.h"
 #include "pcm.h"
 
 static unsigned int g_rate = 0; // 18.14 fixed point
 
-void pcm_write(unsigned int a, unsigned int d)
+PICO_INTERNAL_ASM void pcm_write(unsigned int a, unsigned int d)
 {
 //printf("pcm_write(%i, %02x)\n", a, d);
 
@@ -46,7 +50,7 @@ void pcm_write(unsigned int a, unsigned int d)
 }
 
 
-void pcm_set_rate(int rate)
+PICO_INTERNAL void pcm_set_rate(int rate)
 {
        float step = 31.8 * 1024.0 / (float) rate; // max <4 @ 8000Hz
        step *= 256*256/4;
@@ -56,9 +60,7 @@ void pcm_set_rate(int rate)
 }
 
 
-// TODO: make use of the fact that max_length == 3
-
-void pcm_update(int *buffer, int length, int stereo)
+PICO_INTERNAL void pcm_update(int *buffer, int length, int stereo)
 {
        struct pcm_chan *ch;
        unsigned int step, addr;