add sound to sms and pce emus

MCUME_pico2/CMakeLists.txt

@@ -19,8 +19,8 @@ include(pico_sdk_import.cmake)
 #set(TARGET picovcs)
 #set(TARGET picogb)
 #set(TARGET picopce)
-#set(TARGET picosms)
+set(TARGET picosms)
-set(TARGET picogen)
+#set(TARGET picogen)
 
 #set(TARGET pico5200)
 

MCUME_pico2/picogen/emu.cpp

@@ -24,7 +24,7 @@ bool show_fps = true;
 bool limit_fps = true;
 bool interlace = true;
 bool frameskip = true;
-int z80_enable_mode = 2;
+static int z80_enable_mode = 2;
 bool sn76489_enabled = true;
 extern unsigned short button_state[3];
 
@@ -126,8 +126,8 @@ void gen_Step(void) {
     ym2612_clock = 0;
     ym2612_index = 0;        
     scan_line = 0;
-     //if (z80_enable_mode == 1)
+    if (z80_enable_mode == 1)
-        //z80_run(lines_per_frame * VDP_CYCLES_PER_LINE);
+        z80_run(lines_per_frame * VDP_CYCLES_PER_LINE);
 
     //printf("m(%x)\n", frame);
     while (scan_line < lines_per_frame) {
@@ -249,6 +249,8 @@ void gen_Step(void) {
 
 void SND_Process(void *stream, int len) {
     if (audio_enabled) {
+        //if ( (z80_enable_mode == 3) && (system_clock == 0) )
+        //    z80_run(262 * VDP_CYCLES_PER_LINE);
         ym2612_run(262 * VDP_CYCLES_PER_LINE);
         gwenesis_SN76489_run(262 * VDP_CYCLES_PER_LINE);
         audio_sample * snd_buf =  (audio_sample *)stream;

MCUME_pico2/picopce/emu.cpp

@@ -6,6 +6,7 @@
 extern "C" {
 #include "pce-go/pce-go.h"
 #include "pce-go/pce.h"
+#include <pce-go/psg.h>
 }
 
 #include "flash_t.h"
@@ -16,6 +17,11 @@ void emu_KeyboardOnDown(int keymodifer, int key) {
 void emu_KeyboardOnUp(int keymodifer, int key) {
 }
 
+#define AUDIO_SAMPLE_RATE 22050
+#define AUDIO_BUFFER_LENGTH (AUDIO_SAMPLE_RATE / 60 + 1)
+
+alignas(4) int audio_buffer[AUDIO_BUFFER_LENGTH];
+
 
 void pce_Init(void)
 {
@@ -40,13 +46,10 @@ void pce_Start(char * filename)
 
   int size = flash_load(filename);
   PalettePCE(0);
-  InitPCE(22050, false, (const void *)flash_start, (size_t)size);
+  InitPCE(AUDIO_SAMPLE_RATE, true, (const void *)flash_start, (size_t)size);
 
-#ifdef SOUND_PRESENT
 #ifdef HAS_SND  
   emu_sndInit(); 
-#endif  
-#else
 #endif  
 
   emu_printf("pce_Start done");
@@ -77,12 +80,16 @@ void pce_Step(void) {
           
   PCE.Joypad.regs[0] = buttons; 
 
-  //psg_update((int16_t *) audio_buffer, AUDIO_BUFFER_LENGTH, 0xff);
-  //i2s_dma_write(&i2s_config, (const int16_t *) audio_buffer);
-
   //emu_DrawVsync();   
 }
 
 void SND_Process(void *stream, int len) {
-//  psg_update((int16*)stream, 0, len);  
+  int16_t * buf = (int16_t *) audio_buffer;
+  psg_update(buf, AUDIO_BUFFER_LENGTH, 0xff);
+  audio_sample * snd_buf =  (audio_sample *)stream;
+  for (int h = 0; h < len*2; h += 2) {            
+      int16_t s1 = buf[h]>>8; 
+      int16_t s2 =  buf[h+1]>>8;
+      *snd_buf++ = ((s1+s2)/2)+128;
+  } 
 } 

MCUME_pico2/picopce/picopce.cpp

@@ -169,8 +169,11 @@ void * emu_LineBuffer(int line)
 #include "AudioPlaySystem.h"
 AudioPlaySystem mymixer;
 
+#define AUDIO_SAMPLE_RATE 22050
+#define AUDIO_BUFFER_LENGTH (AUDIO_SAMPLE_RATE / 60 + 1)
+
 void emu_sndInit() {
-  tft.begin_audio(256, mymixer.snd_Mixer);
+  tft.begin_audio(AUDIO_BUFFER_LENGTH*2, mymixer.snd_Mixer);
   mymixer.start();    
 }
 

MCUME_pico2/picosms/emu.cpp

@@ -114,12 +114,9 @@ void sms_Start(char * filename)
 
 
 #ifdef HAS_SND
-#ifdef SOUND_PRESENT
   system_init(22050);  
   emu_sndInit();
-#else
+  sms.use_fm = true;
-  system_init(0);
-#endif  
 #else
   system_init(0);
 #endif
@@ -150,20 +147,26 @@ void sms_Step(void)
     input.pad[0] |= INPUT_BUTTON2;
   }
 
-//    if(check_key(KEY_DEL))  input.system |= INPUT_HARD_RESET;
+  //if (k & MASK_KEY_USER4)  input.system |= INPUT_HARD_RESET;
-//    if(check_key(KEY_TAB))  input.system |= (IS_GG) ? INPUT_HARD_RESET : INPUT_SOFT_RESET;
+  //if (k & MASK_KEY_USER1)  input.system |= (IS_GG) ? INPUT_HARD_RESET : INPUT_SOFT_RESET;
-  if (k & MASK_KEY_USER2)  input.system |= (IS_GG) ? INPUT_START : INPUT_PAUSE;
+  if (k & MASK_KEY_USER1)  input.pad[0] |= INPUT_BUTTON2;
+  //if (k & MASK_KEY_USER2)  input.system |= (IS_GG) ? INPUT_START : INPUT_PAUSE;
   
   sms_frame(0); 
-  //emu_printi(emu_FrameSkip());
 
   emu_DrawVsync();    
 }
 
-void SND_Process(void *stream, int len) {
-#ifdef SOUND_PRESENT
 #ifdef HAS_SND
-//  audio_play_sample(stream, 0, len);
+static int16 sndl[512];
+static int16 sndr[512];
 #endif
+
+void SND_Process(void *stream, int len) {
+#ifdef HAS_SND
+  audio_sample * snd_buf =  (audio_sample *)stream;
+  audio_play_sample(&sndl[0], &sndr[0], len);
+  for (int i = 0; i< len; i++ )
+    *snd_buf++ = ((sndl[i]>>8)+(sndr[i]>>8))/2+128;
 #endif  
 } 

MCUME_pico2/picosms/emucfg.h

@@ -5,7 +5,7 @@
 #define VID_FRAME_SKIP       0x0
 #define TFT_VBUFFER_YCROP    0
 #define SINGLELINE_RENDERING 1
-//#define CUSTOM_SND           1
+#define CUSTOM_SND           1
 //#define TIMER_REND           1
 #define EXTRA_HEAP           0x10
 #define FILEBROWSER

MCUME_pico2/picosms/picosms.cpp

@@ -322,9 +322,9 @@ void * emu_LineBuffer(int line)
 #ifdef HAS_SND
 #include "AudioPlaySystem.h"
 AudioPlaySystem mymixer;
-
+#define AUDIO_BUFFER_LEN  (22050/50)
 void emu_sndInit() {
-  tft.begin_audio(256, mymixer.snd_Mixer);
+  tft.begin_audio(AUDIO_BUFFER_LEN*2, mymixer.snd_Mixer);
   mymixer.start();    
 }
 

MCUME_pico2/picosms/program_config.h

@@ -3,4 +3,8 @@
 
 #define FLASH_STORE_START 0x100000  
 
+#ifdef HAS_USBPIO
+//#undef HAS_SND
+#endif
+
 #endif