GODOT IS OPEN SOURCE

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diff --git a/scene/resources/audio_stream_resampled.h b/scene/resources/audio_stream_resampled.h
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+++ b/scene/resources/audio_stream_resampled.h
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+/*************************************************************************/
+/*  audio_stream_resampled.h                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef AUDIO_STREAM_RESAMPLED_H
+#define AUDIO_STREAM_RESAMPLED_H
+
+#include "scene/resources/audio_stream.h"
+
+
+class AudioStreamResampled : public AudioStream {
+	OBJ_TYPE(AudioStreamResampled,AudioStream);
+
+	uint32_t rb_bits;
+	uint32_t rb_len;
+	uint32_t rb_mask;
+	uint32_t read_buff_len;
+	uint32_t channels;
+	uint32_t mix_rate;
+
+	volatile int rb_read_pos;
+	volatile int rb_write_pos;
+
+	int32_t offset; //contains the fractional remainder of the resampler
+	enum {
+		MIX_FRAC_BITS=13,
+		MIX_FRAC_LEN=(1<<MIX_FRAC_BITS),
+		MIX_FRAC_MASK=MIX_FRAC_LEN-1,
+	};
+
+	int16_t *read_buf;
+	int16_t *rb;
+
+
+	template<int C>
+	void _resample(int32_t *p_dest,int p_todo,int32_t p_increment);
+
+
+protected:
+
+	_FORCE_INLINE_ int get_total() const {
+
+		return rb_len;
+	}
+
+	_FORCE_INLINE_ int get_todo() const { //return amount of frames to mix
+
+		int todo;
+		int read_pos_cache=rb_read_pos;
+
+		if (read_pos_cache==rb_write_pos) {
+			todo=rb_len-1;
+		} else if (read_pos_cache>rb_write_pos) {
+
+			todo=read_pos_cache-rb_write_pos-1;
+		} else {
+
+			todo=(rb_len-rb_write_pos)+read_pos_cache-1;
+		}
+
+		return todo;
+	}
+
+	//Stream virtual funcs
+	virtual int get_channel_count() const;
+	virtual bool mix(int32_t *p_dest, int p_frames);
+
+	_FORCE_INLINE_ void _flush() {
+		rb_read_pos=0;
+		rb_write_pos=0;
+	}
+
+	_FORCE_INLINE_ int16_t *get_write_buffer() { return read_buf; }
+	_FORCE_INLINE_ void write(uint32_t p_frames) {
+
+		ERR_FAIL_COND(p_frames > rb_len);
+
+		switch(channels) {
+			case 1: {
+
+				for(uint32_t i=0;i<p_frames;i++) {
+
+					rb[ rb_write_pos ] = read_buf[i];
+					rb_write_pos=(rb_write_pos+1)&rb_mask;
+				}
+			} break;
+			case 2: {
+
+				for(uint32_t i=0;i<p_frames;i++) {
+
+					rb[ (rb_write_pos<<1)+0 ] = read_buf[(i<<1)+0];
+					rb[ (rb_write_pos<<1)+1 ] = read_buf[(i<<1)+1];
+					rb_write_pos=(rb_write_pos+1)&rb_mask;
+				}
+			} break;
+			case 4: {
+
+				for(uint32_t i=0;i<p_frames;i++) {
+
+					rb[ (rb_write_pos<<2)+0 ] = read_buf[(i<<2)+0];
+					rb[ (rb_write_pos<<2)+1 ] = read_buf[(i<<2)+1];
+					rb[ (rb_write_pos<<2)+2 ] = read_buf[(i<<2)+2];
+					rb[ (rb_write_pos<<2)+3 ] = read_buf[(i<<2)+3];
+					rb_write_pos=(rb_write_pos+1)&rb_mask;
+				}
+			} break;
+			case 6: {
+
+				for(uint32_t i=0;i<p_frames;i++) {
+
+					rb[ (rb_write_pos*6)+0 ] = read_buf[(i*6)+0];
+					rb[ (rb_write_pos*6)+1 ] = read_buf[(i*6)+1];
+					rb[ (rb_write_pos*6)+2 ] = read_buf[(i*6)+2];
+					rb[ (rb_write_pos*6)+3 ] = read_buf[(i*6)+3];
+					rb[ (rb_write_pos*6)+4 ] = read_buf[(i*6)+4];
+					rb[ (rb_write_pos*6)+5 ] = read_buf[(i*6)+5];
+					rb_write_pos=(rb_write_pos+1)&rb_mask;
+				}
+			} break;
+
+
+		}
+
+	}
+
+	virtual bool _can_mix() const =0;
+
+	_FORCE_INLINE_ bool _is_ready() const{
+		return rb!=NULL;
+	}
+
+	Error _setup(int p_channels,int p_mix_rate,int p_minbuff_needed=-1);
+	void _clear();
+
+public:
+	AudioStreamResampled();
+	~AudioStreamResampled();
+};
+
+#endif // AUDIO_STREAM_RESAMPLED_H