166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef GUACENC_FFMPEG_COMPAT_H
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#define GUACENC_FFMPEG_COMPAT_H
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#include "config.h"
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#include "video.h"
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#include <libavcodec/avcodec.h>
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/*
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* For a full list of FFmpeg API changes over the years, see:
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*
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* https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges
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*/
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/* For libavcodec < 55.28.1: av_frame_*() was avcodec_*_frame(). */
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
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#define av_frame_alloc avcodec_alloc_frame
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#define av_frame_free avcodec_free_frame
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#endif
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/* For libavcodec < 54.28.0: old avcodec_free_frame() did not exist. */
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(54,28,0)
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#define avcodec_free_frame av_freep
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#endif
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/* For libavcodec < 55.52.0: avcodec_free_context did not exist */
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,52,0)
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#define avcodec_free_context av_freep
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#endif
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/* For libavcodec < 57.7.0: av_packet_unref() was av_free_packet() */
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,7,0)
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#define av_packet_unref av_free_packet
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#endif
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/* For libavcodec <= 56.41.100: Global header flag didn't have AV_ prefix.
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* Guacenc defines its own flag here to avoid conflicts with libavcodec
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* macros.
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*/
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#if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(56,41,100)
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#define GUACENC_FLAG_GLOBAL_HEADER CODEC_FLAG_GLOBAL_HEADER
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#else
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#define GUACENC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER
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#endif
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/* For libavutil < 51.42.0: AV_PIX_FMT_* was PIX_FMT_* */
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#if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(51,42,0)
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#define AV_PIX_FMT_RGB32 PIX_FMT_RGB32
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#define AV_PIX_FMT_YUV420P PIX_FMT_YUV420P
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#endif
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/**
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* Writes the specied frame as a new frame of video. If pending frames of the
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* video are being flushed, the given frame may be NULL (as required by
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* avcodec_encode_video2()). If avcodec_encode_video2() does not exist, this
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* function will transparently use avcodec_encode_video().
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*
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* @param video
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* The video to write the given frame to.
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*
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* @param frame
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* The frame to write to the video, or NULL if previously-written frames
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* are being flushed.
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*
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* @return
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* A positive value if the frame was successfully written, zero if the
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* frame has been saved for later writing / reordering, negative if an
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* error occurs.
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*/
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int guacenc_avcodec_encode_video(guacenc_video* video, AVFrame* frame);
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/**
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* Creates and sets up the AVCodecContext for the appropriate version of
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* libavformat installed. The AVCodecContext will be built, but the AVStream
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* will also be affected by having its time_base field set to the value passed
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* into this function.
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*
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* @param stream
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* The open AVStream.
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*
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* @param codec
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* The codec used on the AVStream.
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*
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* @param bitrate
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* The target bitrate for the encoded video
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*
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* @param width
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* The target width for the encoded video.
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*
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* @param height
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* The target height for the encoded video.
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*
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* @param gop_size
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* The size of the Group of Pictures.
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*
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* @param qmax
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* The max value of the quantizer.
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*
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* @param qmin
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* The min value of the quantizer.
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*
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* @param pix_fmt
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* The target pixel format for the encoded video.
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*
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* @param time_base
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* The target time base for the encoded video.
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*
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* @return
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* The pointer to the configured AVCodecContext.
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*
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*/
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AVCodecContext* guacenc_build_avcodeccontext(AVStream* stream, AVCodec* codec,
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int bitrate, int width, int height, int gop_size, int qmax, int qmin,
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int pix_fmt, AVRational time_base);
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/**
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* A wrapper for avcodec_open2(). Because libavformat ver 57.33.100 and greater
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* use stream->codecpar rather than stream->codec to handle information to the
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* codec, there needs to be an additional step in that version. So this
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* wrapper handles that. Otherwise, it's the same as avcodec_open2().
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*
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* @param avcodec_context
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* The context to initialize.
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*
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* @param codec
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* The codec to open this context for. If a non-NULL codec has been
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* previously passed to avcodec_alloc_context3() or for this context, then
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* this parameter MUST be either NULL or equal to the previously passed
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* codec.
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*
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* @param options
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* A dictionary filled with AVCodecContext and codec-private options. On
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* return this object will be filled with options that were not found.
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*
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* @param stream
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* The stream for the codec context.
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*
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* @return
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* Zero on success, a negative value on error.
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*/
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int guacenc_open_avcodec(AVCodecContext *avcodec_context,
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AVCodec *codec, AVDictionary **options,
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AVStream* stream);
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#endif
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