From 841a0909b94716aab68acc8d08e00fd863cc2631 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Mon, 29 Jun 2015 00:24:52 -0700
Subject: [PATCH] GBA Audio: Implement audio reset for channels A/B

---
 CHANGES         | 1 +
 README.md       | 1 -
 src/gba/audio.c | 7 ++++++-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/CHANGES b/CHANGES
index bf49561b1..74697337c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -86,6 +86,7 @@ Misc:
  - ARM7: Reduce the size of the Thumb instruction table
  - GBA: Don't include GBACLIDebugger struct unless needed
  - SDL: Clean up GL context
+ - GBA Audio: Implement audio reset for channels A/B
 
 0.2.1: (2015-05-13)
 Bugfixes:
diff --git a/README.md b/README.md
index 91fc00c2d..74ce04c0d 100644
--- a/README.md
+++ b/README.md
@@ -104,7 +104,6 @@ Footnotes
 - OBJ window for modes 3, 4 and 5 ([Bug #5](http://mgba.io/b/5))
 - Mosaic for transformed OBJs ([Bug #9](http://mgba.io/b/9))
 - BIOS call RegisterRamReset is partially stubbed out ([Bug #141](http://mgba.io/b/141))
-- Audio channel reset flags ([Bug #142](http://mgba.io/b/142))
 - Game Pak prefetch ([Bug #195](http://mgba.io/b/195))
 - BIOS call Stop, for entering sleep mode ([Bug #199](http://mgba.io/b/199))
 
diff --git a/src/gba/audio.c b/src/gba/audio.c
index 26e9ac3b5..652ebc2f0 100644
--- a/src/gba/audio.c
+++ b/src/gba/audio.c
@@ -456,7 +456,12 @@ void GBAAudioWriteSOUNDCNT_HI(struct GBAAudio* audio, uint16_t value) {
 	audio->chBRight = GBARegisterSOUNDCNT_HIGetChBRight(value);
 	audio->chBLeft = GBARegisterSOUNDCNT_HIGetChBLeft(value);
 	audio->chBTimer = GBARegisterSOUNDCNT_HIGetChBTimer(value);
-	// TODO: Implement channel reset
+	if (GBARegisterSOUNDCNT_HIIsChAReset(value)) {
+		CircleBufferClear(&audio->chA.fifo);
+	}
+	if (GBARegisterSOUNDCNT_HIIsChBReset(value)) {
+		CircleBufferClear(&audio->chB.fifo);
+	}
 }
 
 void GBAAudioWriteSOUNDCNT_X(struct GBAAudio* audio, uint16_t value) {