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diff --git a/ffmpeg1/libavcodec/libschroedinger.h b/ffmpeg1/libavcodec/libschroedinger.h
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+++ b/ffmpeg1/libavcodec/libschroedinger.h
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+/*
+ * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+* @file
+* data structures common to libschroedinger decoder and encoder
+*/
+
+#ifndef AVCODEC_LIBSCHROEDINGER_H
+#define AVCODEC_LIBSCHROEDINGER_H
+
+#include <schroedinger/schrobitstream.h>
+#include <schroedinger/schroframe.h>
+
+#include "avcodec.h"
+
+typedef struct SchroVideoFormatInfo {
+    uint16_t width;
+    uint16_t height;
+    uint16_t frame_rate_num;
+    uint16_t frame_rate_denom;
+} SchroVideoFormatInfo;
+
+/**
+* contains a single encoded frame returned from Dirac or Schroedinger
+*/
+typedef struct FFSchroEncodedFrame {
+    /** encoded frame data */
+    uint8_t *p_encbuf;
+
+    /** encoded frame size */
+    uint32_t size;
+
+    /** encoded frame number. Will be used as pts */
+    uint32_t frame_num;
+
+    /** key frame flag. 1 : is key frame , 0 : in not key frame */
+    uint16_t key_frame;
+} FFSchroEncodedFrame;
+
+/**
+* queue element
+*/
+typedef struct FFSchroQueueElement {
+    /** Data to be stored in queue*/
+    void *data;
+    /** Pointer to next element queue */
+    struct FFSchroQueueElement *next;
+} FFSchroQueueElement;
+
+
+/**
+* A simple queue implementation used in libschroedinger
+*/
+typedef struct FFSchroQueue {
+    /** Pointer to head of queue */
+    FFSchroQueueElement *p_head;
+    /** Pointer to tail of queue */
+    FFSchroQueueElement *p_tail;
+    /** Queue size*/
+    int size;
+} FFSchroQueue;
+
+/**
+* Initialise the queue
+*/
+void ff_schro_queue_init(FFSchroQueue *queue);
+
+/**
+* Add an element to the end of the queue
+*/
+int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data);
+
+/**
+* Return the first element in the queue
+*/
+void *ff_schro_queue_pop(FFSchroQueue *queue);
+
+/**
+* Free the queue resources. free_func is a function supplied by the caller to
+* free any resources allocated by the caller. The data field of the queue
+* element is passed to it.
+*/
+void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *));
+
+static const struct {
+    enum AVPixelFormat  ff_pix_fmt;
+    SchroChromaFormat schro_pix_fmt;
+    SchroFrameFormat  schro_frame_fmt;
+} schro_pixel_format_map[] = {
+    { AV_PIX_FMT_YUV420P, SCHRO_CHROMA_420, SCHRO_FRAME_FORMAT_U8_420 },
+    { AV_PIX_FMT_YUV422P, SCHRO_CHROMA_422, SCHRO_FRAME_FORMAT_U8_422 },
+    { AV_PIX_FMT_YUV444P, SCHRO_CHROMA_444, SCHRO_FRAME_FORMAT_U8_444 },
+};
+
+/**
+* Returns the video format preset matching the input video dimensions and
+* time base.
+*/
+SchroVideoFormatEnum ff_get_schro_video_format_preset (AVCodecContext *avctx);
+
+/**
+* Sets the Schroedinger frame format corresponding to the Schro chroma format
+* passed. Returns 0 on success, -1 on failure.
+*/
+int ff_get_schro_frame_format(SchroChromaFormat schro_chroma_fmt,
+                              SchroFrameFormat  *schro_frame_fmt);
+
+/**
+* Create a Schro frame based on the dimensions and frame format
+* passed. Returns a pointer to a frame on success, NULL on failure.
+*/
+SchroFrame *ff_create_schro_frame(AVCodecContext *avctx,
+                                  SchroFrameFormat schro_frame_fmt);
+
+#endif /* AVCODEC_LIBSCHROEDINGER_H */