From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/include/libavfilter/buffersrc.h | 209 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 209 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/include/libavfilter/buffersrc.h b/module/VideoPlayer/lib/linux/ffmpeg/include/libavfilter/buffersrc.h
new file mode 100644
index 0000000..08fbd18
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/include/libavfilter/buffersrc.h
@@ -0,0 +1,209 @@
+/*
+ * 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
+ */
+
+#ifndef AVFILTER_BUFFERSRC_H
+#define AVFILTER_BUFFERSRC_H
+
+/**
+ * @file
+ * @ingroup lavfi_buffersrc
+ * Memory buffer source API.
+ */
+
+#include "avfilter.h"
+
+/**
+ * @defgroup lavfi_buffersrc Buffer source API
+ * @ingroup lavfi
+ * @{
+ */
+
+enum {
+
+ /**
+ * Do not check for format changes.
+ */
+ AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
+
+ /**
+ * 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,
+
+};
+
+/**
+ * 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);
+
+/**
+ * This structure contains the parameters describing the frames that will be
+ * passed to this filter.
+ *
+ * It should be allocated with av_buffersrc_parameters_alloc() and freed with
+ * av_free(). All the allocated fields in it remain owned by the caller.
+ */
+typedef struct AVBufferSrcParameters {
+ /**
+ * video: the pixel format, value corresponds to enum AVPixelFormat
+ * audio: the sample format, value corresponds to enum AVSampleFormat
+ */
+ int format;
+ /**
+ * The timebase to be used for the timestamps on the input frames.
+ */
+ AVRational time_base;
+
+ /**
+ * Video only, the display dimensions of the input frames.
+ */
+ int width, height;
+
+ /**
+ * Video only, the sample (pixel) aspect ratio.
+ */
+ AVRational sample_aspect_ratio;
+
+ /**
+ * Video only, the frame rate of the input video. This field must only be
+ * set to a non-zero value if input stream has a known constant framerate
+ * and should be left at its initial value if the framerate is variable or
+ * unknown.
+ */
+ AVRational frame_rate;
+
+ /**
+ * Video with a hwaccel pixel format only. This should be a reference to an
+ * AVHWFramesContext instance describing the input frames.
+ */
+ AVBufferRef *hw_frames_ctx;
+
+ /**
+ * Audio only, the audio sampling rate in samples per second.
+ */
+ int sample_rate;
+
+ /**
+ * Audio only, the audio channel layout
+ */
+ uint64_t channel_layout;
+} AVBufferSrcParameters;
+
+/**
+ * Allocate a new AVBufferSrcParameters instance. It should be freed by the
+ * caller with av_free().
+ */
+AVBufferSrcParameters *av_buffersrc_parameters_alloc(void);
+
+/**
+ * Initialize the buffersrc or abuffersrc filter with the provided parameters.
+ * This function may be called multiple times, the later calls override the
+ * previous ones. Some of the parameters may also be set through AVOptions, then
+ * whatever method is used last takes precedence.
+ *
+ * @param ctx an instance of the buffersrc or abuffersrc filter
+ * @param param the stream parameters. The frames later passed to this filter
+ * must conform to those parameters. All the allocated fields in
+ * param remain owned by the caller, libavfilter will make internal
+ * copies or references when necessary.
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param);
+
+/**
+ * Add a frame to the buffer source.
+ *
+ * @param ctx 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.
+ */
+av_warn_unused_result
+int av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame);
+
+/**
+ * Add a frame to the buffer source.
+ *
+ * @param ctx 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.
+ */
+av_warn_unused_result
+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 controlled
+ * 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
+ */
+av_warn_unused_result
+int av_buffersrc_add_frame_flags(AVFilterContext *buffer_src,
+ AVFrame *frame, int flags);
+
+/**
+ * Close the buffer source after EOF.
+ *
+ * This is similar to passing NULL to av_buffersrc_add_frame_flags()
+ * except it takes the timestamp of the EOF, i.e. the timestamp of the end
+ * of the last frame.
+ */
+int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags);
+
+/**
+ * @}
+ */
+
+#endif /* AVFILTER_BUFFERSRC_H */
--
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