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https://github.com/ZLMediaKit/ZLMediaKit.git
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全面更新整理c sdk
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ziyue
154
api/include/mk_transcode.h
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154
api/include/mk_transcode.h
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/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_MK_TRANSCODE_H
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#define ZLMEDIAKIT_MK_TRANSCODE_H
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#include "mk_common.h"
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#include "mk_track.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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//解码器对象
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typedef void *mk_decoder;
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//解码后的frame
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typedef void *mk_frame_pix;
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//SwsContext的包装
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typedef void *mk_swscale;
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//FFmpeg原始解码帧对象
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typedef struct AVFrame AVFrame;
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//FFmpeg编解码器对象
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typedef struct AVCodecContext AVCodecContext;
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//解码输出回调
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typedef void(API_CALL *on_mk_decode)(void *user_data, mk_frame_pix frame);
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/**
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* 创建解码器
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* @param track track对象
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* @param thread_num 解码线程数，0时为自动
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* @return 返回解码器对象，NULL代表失败
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*/
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API_EXPORT mk_decoder API_CALL mk_decoder_create(mk_track track, int thread_num);
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/**
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* 销毁解码器
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* @param ctx 解码器对象
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* @param flush_frame 是否等待所有帧解码成功
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*/
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API_EXPORT void API_CALL mk_decoder_release(mk_decoder ctx, int flush_frame);
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/**
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* 解码音视频帧
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* @param ctx 解码器
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* @param frame 帧对象
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* @param async 是否异步解码
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* @param enable_merge 是否合并帧解码，有些情况下，需要把时间戳相同的slice合并输入到解码器才能解码
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*/
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API_EXPORT void API_CALL mk_decoder_decode(mk_decoder ctx, mk_frame frame, int async, int enable_merge);
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/**
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* 设置异步解码最大帧缓存积压数限制
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*/
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API_EXPORT void API_CALL mk_decoder_set_max_async_frame_size(mk_decoder ctx, size_t size);
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/**
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* 设置解码输出回调
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* @param ctx 解码器
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* @param cb 回调函数
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* @param user_data 回调函数用户指针参数
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*/
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API_EXPORT void API_CALL mk_decoder_set_cb(mk_decoder ctx, on_mk_decode cb, void *user_data);
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/**
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* 获取FFmpeg原始AVCodecContext对象
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* @param ctx 解码器
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*/
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API_EXPORT const AVCodecContext* API_CALL mk_decoder_get_context(mk_decoder ctx);
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/////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* 创建解码帧mk_frame_pix新引用
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* @param frame 原始引用
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* @return 新引用
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*/
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API_EXPORT mk_frame_pix API_CALL mk_frame_pix_ref(mk_frame_pix frame);
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/**
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* 解码帧mk_frame_pix减引用
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* @param frame 原始引用
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*/
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API_EXPORT void API_CALL mk_frame_pix_unref(mk_frame_pix frame);
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/**
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* 从FFmpeg AVFrame转换为mk_frame_pix
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* @param frame FFmpeg AVFrame
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* @return mk_frame_pix对象
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*/
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API_EXPORT mk_frame_pix API_CALL mk_frame_pix_from_av_frame(AVFrame *frame);
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/**
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* 获取FFmpeg AVFrame对象
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* @param frame 解码帧mk_frame_pix
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* @return FFmpeg AVFrame对象
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*/
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API_EXPORT AVFrame* API_CALL mk_frame_pix_get_av_frame(mk_frame_pix frame);
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/////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* 创建ffmpeg SwsContext wrapper实例
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* @param output AVPixelFormat类型，AV_PIX_FMT_BGR24==3
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* @param width 目标宽度，置0时，则与输入时一致
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* @param height 目标高度，置0时，则与输入时一致
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* @return SwsContext wrapper 实例
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*/
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API_EXPORT mk_swscale mk_swscale_create(int output, int width, int height);
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/**
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* 释放ffmpeg SwsContext wrapper实例
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* @param ctx SwsContext wrapper实例
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*/
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API_EXPORT void mk_swscale_release(mk_swscale ctx);
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/**
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* 使用SwsContext转换pix format
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* @param ctx SwsContext wrapper实例
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* @param frame pix frame
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* @param out 转换后存放的数据指针，用户需要确保提前申请并大小足够
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* @return sws_scale()返回值：the height of the output slice
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*/
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API_EXPORT int mk_swscale_input_frame(mk_swscale ctx, mk_frame_pix frame, uint8_t *out);
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/**
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* 使用SwsContext转换pix format
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* @param ctx SwsContext wrapper实例
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* @param frame pix frame
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* @return 新的pix frame对象，需要使用mk_frame_pix_unref销毁
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*/
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API_EXPORT mk_frame_pix mk_swscale_input_frame2(mk_swscale ctx, mk_frame_pix frame);
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/////////////////////////////////////////////////////////////////////////////////////////////
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API_EXPORT uint8_t** API_CALL mk_get_av_frame_data(AVFrame *frame);
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API_EXPORT int* API_CALL mk_get_av_frame_line_size(AVFrame *frame);
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API_EXPORT int64_t API_CALL mk_get_av_frame_dts(AVFrame *frame);
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API_EXPORT int64_t API_CALL mk_get_av_frame_pts(AVFrame *frame);
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API_EXPORT int API_CALL mk_get_av_frame_width(AVFrame *frame);
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API_EXPORT int API_CALL mk_get_av_frame_height(AVFrame *frame);
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API_EXPORT int API_CALL mk_get_av_frame_format(AVFrame *frame);
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#ifdef __cplusplus
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}
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#endif
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#endif //ZLMEDIAKIT_MK_TRANSCODE_H
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