Merge pull request #111 from juan-medina/master

Adding multichannel audio functions

examples/audio/audio_multichannel_sound/audio_multichannel_sound.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	// Initialization
+	//--------------------------------------------------------------------------------------
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [audio] example - Multichannel sound playing")
+
+	rl.InitAudioDevice() // Initialize audio device
+
+	fxWav := rl.LoadSound("sound.wav")  // Load WAV audio file
+	fxOgg := rl.LoadSound("target.ogg") // Load OGG audio file
+
+	rl.SetSoundVolume(fxWav, 0.2)
+
+	rl.SetTargetFPS(60) // Set our game to run at 60 frames-per-second
+	//--------------------------------------------------------------------------------------
+
+	// Main game loop
+	for !rl.WindowShouldClose() { // Detect window close button or ESC key
+		// Update
+		//----------------------------------------------------------------------------------
+		if rl.IsKeyPressed(rl.KeyEnter) {
+			rl.PlaySoundMulti(fxWav)
+		} // Play a new wav sound instance
+		if rl.IsKeyPressed(rl.KeySpace) {
+			rl.PlaySoundMulti(fxOgg)
+		} // Play a new ogg sound instance
+		//----------------------------------------------------------------------------------
+
+		// Draw
+		//----------------------------------------------------------------------------------
+		rl.BeginDrawing()
+
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawText("MULTICHANNEL SOUND PLAYING", 20, 20, 20, rl.Gray)
+		rl.DrawText("Press SPACE to play new ogg instance!", 200, 120, 20, rl.LightGray)
+		rl.DrawText("Press ENTER to play new wav instance!", 200, 180, 20, rl.LightGray)
+
+		rl.DrawText(fmt.Sprintf("CONCURRENT SOUNDS PLAYING: %02d", rl.GetSoundsPlaying()), 220, 280, 20, rl.Red)
+
+		rl.EndDrawing()
+		//----------------------------------------------------------------------------------
+	}
+
+	// De-Initialization
+	//--------------------------------------------------------------------------------------
+	rl.StopSoundMulti() // We must stop the buffer pool before unloading
+
+	rl.UnloadSound(fxWav) // Unload sound data
+	rl.UnloadSound(fxOgg) // Unload sound data
+
+	rl.CloseAudioDevice() // Close audio device
+
+	rl.CloseWindow() // Close window and OpenGL context
+	//--------------------------------------------------------------------------------------
+}

raylib/raudio.go

@@ -334,3 +334,21 @@ func StopAudioStream(stream AudioStream) {
 	cstream := stream.cptr()
 	C.StopAudioStream(*cstream)
 }
+
+// PlaySoundMulti - Play a sound (using multichannel buffer pool)
+func PlaySoundMulti(sound Sound) {
+	csound := sound.cptr()
+	C.PlaySoundMulti(*csound)
+}
+
+// GetSoundsPlaying - Get number of sounds playing in the multichannel
+func GetSoundsPlaying() int {
+	ret := C.GetSoundsPlaying()
+	v := int(ret)
+	return v
+}
+
+// StopSoundMulti - Stop any sound playing (using multichannel buffer pool)
+func StopSoundMulti() {
+	C.StopSoundMulti()
+}