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diff --git a/ffmpeg1/libavfilter/buffersrc.h b/ffmpeg1/libavfilter/buffersrc.h
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+++ b/ffmpeg1/libavfilter/buffersrc.h
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+/*
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_BUFFERSRC_H
+#define AVFILTER_BUFFERSRC_H
+
+/**
+ * @file
+ * Memory buffer source API.
+ */
+
+#include "libavcodec/avcodec.h"
+#include "avfilter.h"
+
+enum {
+
+    /**
+     * Do not check for format changes.
+     */
+    AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
+
+#if FF_API_AVFILTERBUFFER
+    /**
+     * Ignored
+     */
+    AV_BUFFERSRC_FLAG_NO_COPY = 2,
+#endif
+
+    /**
+     * Immediately push the frame to the output.
+     */
+    AV_BUFFERSRC_FLAG_PUSH = 4,
+
+    /**
+     * Keep a reference to the frame.
+     * If the frame if reference-counted, create a new reference; otherwise
+     * copy the frame data.
+     */
+    AV_BUFFERSRC_FLAG_KEEP_REF = 8,
+
+};
+
+/**
+ * Add buffer data in picref to buffer_src.
+ *
+ * @param buffer_src  pointer to a buffer source context
+ * @param picref      a buffer reference, or NULL to mark EOF
+ * @param flags       a combination of AV_BUFFERSRC_FLAG_*
+ * @return            >= 0 in case of success, a negative AVERROR code
+ *                    in case of failure
+ */
+int av_buffersrc_add_ref(AVFilterContext *buffer_src,
+                         AVFilterBufferRef *picref, int flags);
+
+/**
+ * Get the number of failed requests.
+ *
+ * A failed request is when the request_frame method is called while no
+ * frame is present in the buffer.
+ * The number is reset when a frame is added.
+ */
+unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
+
+#if FF_API_AVFILTERBUFFER
+/**
+ * Add a buffer to the filtergraph s.
+ *
+ * @param buf buffer containing frame data to be passed down the filtergraph.
+ * This function will take ownership of buf, the user must not free it.
+ * A NULL buf signals EOF -- i.e. no more frames will be sent to this filter.
+ *
+ * @deprecated use av_buffersrc_write_frame() or av_buffersrc_add_frame()
+ */
+attribute_deprecated
+int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf);
+#endif
+
+/**
+ * Add a frame to the buffer source.
+ *
+ * @param s an instance of the buffersrc filter.
+ * @param frame frame to be added. If the frame is reference counted, this
+ * function will make a new reference to it. Otherwise the frame data will be
+ * copied.
+ *
+ * @return 0 on success, a negative AVERROR on error
+ *
+ * This function is equivalent to av_buffersrc_add_frame_flags() with the
+ * AV_BUFFERSRC_FLAG_KEEP_REF flag.
+ */
+int av_buffersrc_write_frame(AVFilterContext *s, const AVFrame *frame);
+
+/**
+ * Add a frame to the buffer source.
+ *
+ * @param s an instance of the buffersrc filter.
+ * @param frame frame to be added. If the frame is reference counted, this
+ * function will take ownership of the reference(s) and reset the frame.
+ * Otherwise the frame data will be copied. If this function returns an error,
+ * the input frame is not touched.
+ *
+ * @return 0 on success, a negative AVERROR on error.
+ *
+ * @note the difference between this function and av_buffersrc_write_frame() is
+ * that av_buffersrc_write_frame() creates a new reference to the input frame,
+ * while this function takes ownership of the reference passed to it.
+ *
+ * This function is equivalent to av_buffersrc_add_frame_flags() without the
+ * AV_BUFFERSRC_FLAG_KEEP_REF flag.
+ */
+int av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame);
+
+/**
+ * Add a frame to the buffer source.
+ *
+ * By default, if the frame is reference-counted, this function will take
+ * ownership of the reference(s) and reset the frame. This can be controled
+ * using the flags.
+ *
+ * If this function returns an error, the input frame is not touched.
+ *
+ * @param buffer_src  pointer to a buffer source context
+ * @param frame       a frame, or NULL to mark EOF
+ * @param flags       a combination of AV_BUFFERSRC_FLAG_*
+ * @return            >= 0 in case of success, a negative AVERROR code
+ *                    in case of failure
+ */
+int av_buffersrc_add_frame_flags(AVFilterContext *buffer_src,
+                                 AVFrame *frame, int flags);
+
+
+#endif /* AVFILTER_BUFFERSRC_H */