From 44a797ceaad46fcc9d9faf80efb4f8ad74f611b6 Mon Sep 17 00:00:00 2001
From: Javier <dev.git@javispedro.com>
Date: Wed, 9 Feb 2022 02:49:15 +0100
Subject: emu8k: save emu8k internals in saved states

---
 Emu8000.cpp |  6 ++++--
 Makefile    |  4 ++--
 emu8k.c     | 37 +++++++++++++++++++++++++++++++++++--
 emu8k.h     |  3 +++
 4 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/Emu8000.cpp b/Emu8000.cpp
index a28f0dd..6636c2b 100644
--- a/Emu8000.cpp
+++ b/Emu8000.cpp
@@ -377,9 +377,9 @@ static DECLCALLBACK(int) emuR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
     pHlp->pfnSSMPutU32(pSSM, pThis->uRAMSize);
     pHlp->pfnSSMPutMem(pSSM, pThis->ram, pThis->uRAMSize);
 
-    // TODO Should save the rest of the device state, too.
+    pHlp->pfnSSMPutStruct(pSSM, pThis->emu, g_emu8k_fields);
 
-	return 0;
+    return 0;
 }
 
 /**
@@ -403,6 +403,8 @@ static DECLCALLBACK(int) emuR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint
         pHlp->pfnSSMSkip(pSSM, uRAMSize);
     }
 
+    pHlp->pfnSSMGetStruct(pSSM, pThis->emu, g_emu8k_fields);
+
     pThis->tmLastWrite = RTTimeSystemMilliTS();
 
     if (uVersion > EMU_SAVED_STATE_VERSION)
diff --git a/Makefile b/Makefile
index 6cb628f..bece4c4 100644
--- a/Makefile
+++ b/Makefile
@@ -20,11 +20,11 @@ OUTDIR:=out
 OUTOSDIR:=$(OUTDIR)/$(OS).$(ARCH)
 
 # Files for each library
-ADLIBR3OBJ:=$(OBJOSDIR)/Adlib.o $(OBJOSDIR)/opl3.o 
+ADLIBR3OBJ:=$(OBJOSDIR)/Adlib.o $(OBJOSDIR)/opl3.o
 ADLIBR3LIBS:=
 MPU401R3OBJ:=$(OBJOSDIR)/Mpu401.o
 MPU401R3LIBS:=
-EMU8000R3OBJ:=$(OBJOSDIR)/Emu8000.o $(OBJOSDIR)/emu8k.o 
+EMU8000R3OBJ:=$(OBJOSDIR)/Emu8000.o $(OBJOSDIR)/emu8k.o
 EMU8000R3LIBS:=
 
 ifeq "$(OS)" "linux"
diff --git a/emu8k.c b/emu8k.c
index 2d3d9a0..9684d8f 100644
--- a/emu8k.c
+++ b/emu8k.c
@@ -44,6 +44,7 @@
 #include <iprt/string.h>
 #include <iprt/mem.h>
 
+#include "emu8k.h"
 #include "emu8k_internal.h"
 
 #define pclog(...) LogFlow((__VA_ARGS__))
@@ -2416,6 +2417,7 @@ void emu8k_reset(emu8k_t* emu8k)
 
 void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames)
 {
+    emu8k->pos = 0;
     emu8k_update(emu8k, frames);
 
     // Convert from int32_t samples to int16_t
@@ -2423,8 +2425,6 @@ void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames)
     {
         buf[i] = RT_CLAMP(emu8k->buffer[i], INT16_MIN, INT16_MAX);
     }
-
-    emu8k->pos = 0;
 }
 
 void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint16_t sample_count)
@@ -2436,3 +2436,36 @@ void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint16_t sample_count)
 #endif
     emu8k->sample_count_virtual = sample_count;
 }
+
+const struct SSMFIELD g_emu8k_fields[] =
+{
+    SSMFIELD_ENTRY(emu8k_t, hwcf1),
+    SSMFIELD_ENTRY(emu8k_t, hwcf2),
+    SSMFIELD_ENTRY(emu8k_t, hwcf3),
+    SSMFIELD_ENTRY(emu8k_t, hwcf4),
+    SSMFIELD_ENTRY(emu8k_t, hwcf5),
+    SSMFIELD_ENTRY(emu8k_t, hwcf6),
+    SSMFIELD_ENTRY(emu8k_t, hwcf7),
+    SSMFIELD_ENTRY(emu8k_t, init1),
+    SSMFIELD_ENTRY(emu8k_t, init2),
+    SSMFIELD_ENTRY(emu8k_t, init3),
+    SSMFIELD_ENTRY(emu8k_t, init4),
+    SSMFIELD_ENTRY(emu8k_t, smalr),
+    SSMFIELD_ENTRY(emu8k_t, smarr),
+    SSMFIELD_ENTRY(emu8k_t, smalw),
+    SSMFIELD_ENTRY(emu8k_t, smarw),
+    SSMFIELD_ENTRY(emu8k_t, smld_buffer),
+    SSMFIELD_ENTRY(emu8k_t, smrd_buffer),
+    SSMFIELD_ENTRY(emu8k_t, sample_count),
+    SSMFIELD_ENTRY(emu8k_t, id),
+    SSMFIELD_ENTRY(emu8k_t, cur_reg),
+    SSMFIELD_ENTRY(emu8k_t, cur_voice),
+
+    SSMFIELD_ENTRY(emu8k_t, voice),
+
+    SSMFIELD_ENTRY(emu8k_t, chorus_engine),
+    SSMFIELD_ENTRY(emu8k_t, reverb_engine),
+
+    SSMFIELD_ENTRY_TERM()
+};
+
diff --git a/emu8k.h b/emu8k.h
index f6b7b0f..a119023 100644
--- a/emu8k.h
+++ b/emu8k.h
@@ -41,6 +41,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <VBox/vmm/ssm.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -67,6 +68,8 @@ void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint16_t sample_count);
  *  It is reset to 0 whenever we render and therefore increment the real sample count.
  *  This means that effectively the sample count register may readjust itself (go back or jump ahead) on _render :(. */
 
+extern const struct SSMFIELD g_emu8k_fields[];
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
-- 
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