From e35cff6d299a07d9b34f303717083a9299a37e82 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Mon, 28 Aug 2023 15:16:12 +0100
Subject: Initial import

---
 src/sound.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/sound.c

(limited to 'src/sound.c')

diff --git a/src/sound.c b/src/sound.c
new file mode 100644
index 0000000..3ff9fa4
--- /dev/null
+++ b/src/sound.c
@@ -0,0 +1,134 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <dos.h>
+
+#include "mikmod.h"
+#include "ubox_sound.h"
+
+static uint8_t has_sound = 0;
+static uint8_t cur = 0;
+static uint32_t voice = 0;
+
+static SAMPLE **effects = NULL;
+static uint8_t effects_cnt = 0;
+static MODULE *music = NULL;
+
+uint8_t ubox_sound_init(const ubox_sound_data *mus, const ubox_sound_data *efx, uint8_t efx_cnt)
+{
+    MikMod_InitThreads();
+
+    MikMod_RegisterDriver(&drv_sb);
+    MikMod_RegisterLoader(&load_it);
+
+    md_mode |= DMODE_SOFT_SNDFX | DMODE_SOFT_MUSIC;
+    md_volume = 128;
+    md_sndfxvolume = 128;
+    md_pansep = 0;
+    md_mixfreq = 22050;
+
+    if (MikMod_Init(NULL))
+        /* has_sound is 0 */
+        return 1;
+
+    if (efx && efx_cnt)
+    {
+        effects = (SAMPLE **)calloc(efx_cnt, sizeof(SAMPLE *));
+        if (!effects)
+            return 0;
+
+        for (uint8_t i = 0; i < efx_cnt; i++)
+        {
+            effects[i] = Sample_LoadMem(efx[i].data, efx[i].len);
+            if (!effects[i])
+                return 0;
+        }
+
+        /* 1 voice for effects */
+        if (MikMod_SetNumVoices(-1, 1))
+            /* has_sound is 0 */
+            return 1;
+    }
+
+    /* needs a song playing to get effects; have a "silence" pattern on 0 */
+    if (mus)
+    {
+        music = Player_LoadMem(mus->data, mus->len, 8, 0);
+        if (!music)
+            return 0;
+
+        Player_Start(music);
+    }
+
+    if (MikMod_EnableOutput())
+        /* has_sound is 0 */
+        return 1;
+
+    has_sound = 1;
+    return 1;
+}
+
+volatile static uint8_t divider = 0;
+
+void ubox_sound_update()
+{
+    if (!has_sound)
+        return;
+
+    if (++divider == UBOX_SOUND_DIVIDER)
+    {
+        divider = 0;
+        MikMod_Update();
+    }
+}
+
+void ubox_sound_mute()
+{
+    if (has_sound)
+        MikMod_DisableOutput();
+}
+
+void ubox_sound_unmute()
+{
+    if (has_sound)
+        MikMod_EnableOutput();
+}
+
+void ubox_sound_free()
+{
+    if (!has_sound)
+        return;
+
+    MikMod_DisableOutput();
+
+    if (music)
+        Player_Free(music);
+
+    if (effects && effects_cnt)
+    {
+        for (uint8_t i = 0; i < effects_cnt; i++)
+            if (effects[i])
+                Sample_Free(effects[i]);
+
+        free(effects);
+    }
+
+    MikMod_Exit();
+}
+
+void ubox_sound_music_pattern(uint16_t pat)
+{
+    if (has_sound && music)
+        Player_SetPosition(pat);
+}
+
+void ubox_sound_play_efx(uint8_t efxno)
+{
+    if (has_sound && effects)
+    {
+        if (cur > efxno && !Voice_Stopped(voice))
+            return;
+
+        cur = efxno;
+        voice = Sample_Play(effects[cur], 0, 0);
+    }
+}
-- 
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