From 61f841d9bb5987f49ef76e901ff04cce7d25709b Mon Sep 17 00:00:00 2001
From: RocketRobz <bobesh8@gmail.com>
Date: Fri, 23 Jun 2023 21:37:00 -0600
Subject: [PATCH] Add support for starting points to custom skin music

---
 .../arm9/source/graphics/themefilenames.h     |  2 ++
 romsel_dsimenutheme/arm9/source/sound.cpp     | 27 ++++++++++++++++---
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/romsel_dsimenutheme/arm9/source/graphics/themefilenames.h b/romsel_dsimenutheme/arm9/source/graphics/themefilenames.h
index 611366ae1b..506f721f13 100644
--- a/romsel_dsimenutheme/arm9/source/graphics/themefilenames.h
+++ b/romsel_dsimenutheme/arm9/source/graphics/themefilenames.h
@@ -139,7 +139,9 @@
 #define TFN_FONT_LARGE_DSI          TFN_UI_DIRECTORY"/font/large-dsi.nftr"
 
 #define TFN_SOUND_EFFECTBANK        TFN_UI_DIRECTORY"/sound/sfx.bin"
+#define TFN_START_SOUND_BG          TFN_UI_DIRECTORY"/sound/bgm.start.wav"
 #define TFN_SOUND_BG                TFN_UI_DIRECTORY"/sound/bgm.wav"
+#define TFN_START_SOUND_BG_CACHE    TFN_UI_DIRECTORY"/sound/bgm.start.pcm.raw"
 #define TFN_SOUND_BG_CACHE          TFN_UI_DIRECTORY"/sound/bgm.pcm.raw"
 
 #define TFN_DEFAULT_SOUND_EFFECTBANK      TFN_SYSTEM_SOUND_DIRECTORY"/defaultfx.bin"
diff --git a/romsel_dsimenutheme/arm9/source/sound.cpp b/romsel_dsimenutheme/arm9/source/sound.cpp
index 6340a7ee13..548e32cfd7 100644
--- a/romsel_dsimenutheme/arm9/source/sound.cpp
+++ b/romsel_dsimenutheme/arm9/source/sound.cpp
@@ -212,10 +212,17 @@ SoundControl::SoundControl()
 						break;
 				}
 				if (customSkin) {
+					std::string musicStartPath = TFN_START_SOUND_BG;
 					std::string musicPath = TFN_SOUND_BG;
+					std::string cacheStartPath = TFN_START_SOUND_BG_CACHE;
 					std::string cachePath = TFN_SOUND_BG_CACHE;
 					bool closed = false;
 					if (access(musicPath.c_str(), F_OK) == 0) {
+						loopableMusic = (access(musicStartPath.c_str(), F_OK) == 0);
+						if (loopableMusic) {
+							stream_start_source = fopen(musicStartPath.c_str(), "rb");
+						}
+
 						// Read properties from WAV header
 						u8 wavFormat = 0;
 						u8 numChannels = 1;
@@ -229,21 +236,35 @@ SoundControl::SoundControl()
 						fread(&stream.sampling_rate, sizeof(u16), 1, stream_source);
 
 						if (wavFormat == 0x11) {
-							// If ADPCM and hasn't been successfully converted yet, do so now
-							if(access(cachePath.c_str(), F_OK) != 0 || getFileSize(cachePath.c_str()) == 0) {
+							// If music is ADPCM and hasn't been successfully converted yet, do so now
+							if (loopableMusic && (access(cacheStartPath.c_str(), F_OK) != 0 || getFileSize(cacheStartPath.c_str()) == 0)) { // Start point
+								if (adpcm_main(musicStartPath.c_str(), cacheStartPath.c_str(), numChannels == 2) == -1) {
+									remove(cacheStartPath.c_str());
+								}
+							}
+							if (access(cachePath.c_str(), F_OK) != 0 || getFileSize(cachePath.c_str()) == 0) { // Loop point
 								if (adpcm_main(musicPath.c_str(), cachePath.c_str(), numChannels == 2) == -1) {
 									remove(cachePath.c_str());
 								}
 							}
+							if (loopableMusic) {
+								fclose(stream_start_source);
+							}
 							fclose(stream_source);
 							closed = true;
 						} else {
 							seekPos = 0x2C;
 						}
 					} else {
+						loopableMusic = (access(cacheStartPath.c_str(), F_OK) == 0);
 						closed = true;
 					}
-					if (closed) stream_source = fopen(cachePath.c_str(), "rb");
+					if (closed) {
+						if (loopableMusic) {
+							stream_start_source = fopen(cacheStartPath.c_str(), "rb");
+						}
+						stream_source = fopen(cachePath.c_str(), "rb");
+					}
 					if (stream_source) break; } // fallthrough if stream_source fails.
 				}
 			case 4: