先看界面效果，虽然有点low，但是效果实现了
一、实现原理
1、使用ffmpeg解码视频
2、然后使用libyuv播放解码的视频
二、实现
1、先看目录结构
2、ffmpeg编译以及引用，在之前的篇章已经说过了，不知道得可以看看之前的文章
3、编译libyuv
1、首先在https://chromium.googlesource.com/external/libyuv下载源码，然后上传至Linux服务器下（因为我是在Linux下编译的）
2、这是libyuv的目录
3、创建libyuv目录，在下边创建jni目录，把libyuv源码拷入jni目录下
4、编译libyuv，进入jni目录下输入ndk-build命令，编译即可，然后会生成相应的so和头文件
这是生成好的目录，在libs中就有生成好的so文件
5、把生成好的so放入对应的文件，把源码中include文件的源码放入Android项目中
4、创建native方法PlayerControl.java
package com.xiaofan.testffmpeg2;
import android.view.Surface;
public class PlayerControl {
public native void render(String input, Surface surface);
static {
System.loadLibrary("avutil-54");
System.loadLibrary("swresample-1");
System.loadLibrary("avcodec-56");
System.loadLibrary("avformat-56");
System.loadLibrary("swscale-3");
System.loadLibrary("postproc-53");
System.loadLibrary("avfilter-5");
System.loadLibrary("avdevice-56");
System.loadLibrary("native-lib");
}
}5、使用javah命令生成头文件
com_xiaofan_testffmpeg2_PlayerControl.h
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class com_xiaofan_testffmpeg2_PlayerControl */
#ifndef _Included_com_xiaofan_testffmpeg2_PlayerControl
#define _Included_com_xiaofan_testffmpeg2_PlayerControl
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: com_xiaofan_testffmpeg2_PlayerControl
* Method: render
* Signature: (Ljava/lang/String;)V
*/
JNIEXPORT void JNICALL Java_com_xiaofan_testffmpeg2_PlayerControl_render
(JNIEnv *, jobject, jstring, jobject);
#ifdef __cplusplus
}
#endif
#endifVideoView.java
package com.xiaofan.testffmpeg2.customview;
import android.content.Context;
import android.graphics.PixelFormat;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class VideoView extends SurfaceView{
public VideoView(Context context) {
super(context);
init();
}
public VideoView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public VideoView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init(){
//初始化，SurfaceView绘制的像素格式
SurfaceHolder holder=getHolder();
//RGBA_8888 色彩丰富，但是占用的内存大
holder.setFormat(PixelFormat.RGBA_8888);
}
}
MainActivity.java
package com.xiaofan.testffmpeg2;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import com.xiaofan.testffmpeg2.customview.VideoView;
import java.io.File;
public class MainActivity extends AppCompatActivity {
VideoView myVideoView;
private PlayerControl playerControl;
private String inputStr="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
playerControl=new PlayerControl();
myVideoView = findViewById(R.id.myVideoView);
inputStr= new File(Environment.getExternalStorageDirectory(), "aaaa.mp4").getAbsolutePath();
findViewById(R.id.test).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
playerControl.render(inputStr,myVideoView.getHolder().getSurface());
}
});
}
}
native-lib.c
#include "com_xiaofan_testffmpeg2_PlayerControl.h"
#include <android/log.h>
#include <stdio.h>
#include <stdlib.h>
#include <android/native_window.h>
#include <android/native_window_jni.h>
#define LOGI(FORMAT, ...) __android_log_print(ANDROID_LOG_INFO,"wanxiaofan",FORMAT,##__VA_ARGS__);
#define LOGE(FORMAT, ...) __android_log_print(ANDROID_LOG_ERROR,"wanxiaofan",FORMAT,##__VA_ARGS__);
//封装格式
#include "include/ffmpeg/libavformat/avformat.h"
//解码
#include "include/ffmpeg/libavcodec/avcodec.h"
//缩放
#include "include/ffmpeg/libswscale/swscale.h"
#include "include/ffmpeg/libavutil/avutil.h"
#include "include/ffmpeg/libavutil/frame.h"
#include "include/libyuv/libyuv.h"
#include <unistd.h>
JNIEXPORT void JNICALL Java_com_xiaofan_testffmpeg2_PlayerControl_render
(JNIEnv *env, jobject obj, jstring input_jstr, jobject surface) {
const char *input_cstr = (*env)->GetStringUTFChars(env, input_jstr,
JNI_FALSE);
//1、注册组件
av_register_all();
//2、打开输入视频文件
AVFormatContext *pFormatCtx = avformat_alloc_context();
LOGE("%s", input_cstr);
if (avformat_open_input(&pFormatCtx, input_cstr, NULL, NULL) != 0) {
LOGE("%s", "打开输入视频文件失败！");
return;
};
//3、获取视频信息
if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {
LOGE("%s", "获取视频信息失败！");
return;
}
//视频解码，需要找到视频对应的AVStream所在pFormatCtx->streams的索引位置
int video_stream_idx = -1;
int i = 0;
for (; i < pFormatCtx->nb_streams; i++) {
if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
video_stream_idx = i;
break;
}
}
//4.获取视频解码器
AVCodecContext *pCodeCtx =
pFormatCtx->streams[video_stream_idx]->codec;
AVCodec *pCodec = avcodec_find_decoder(pCodeCtx->codec_id);
if (pCodec == NULL) {
LOGE("%s", "无法解码！");
return;
}
//5、打开解码器
if (avcodec_open2(pCodeCtx, pCodec, NULL) < 0) {
LOGE("%s", "无法打开解码器！");
return;
};
//压缩数据
AVPacket *packet = (AVPacket *) av_malloc(sizeof(AVPacket));
//像素数据(解码数据)
AVFrame *yuvFrame = av_frame_alloc();
AVFrame *rgbFrame = av_frame_alloc();
//native绘制
ANativeWindow *nativeWindow = ANativeWindow_fromSurface(env, surface);
//只有指定了AVFrame的像素格式、画面大小才能真正分配内存
//缓冲区分配内存
uint8_t *out_buffer = (uint8_t *) av_malloc
(avpicture_get_size(AV_PIX_FMT_YUV420P, pCodeCtx->width, pCodeCtx->height));
//初始化缓冲区
avpicture_fill((AVPicture *) yuvFrame, out_buffer, AV_PIX_FMT_YUV420P,
pCodeCtx->width, pCodeCtx->height);
ANativeWindow_Buffer outBuffer;
//6、一帧一帧读取压缩的视频数据AVPacket
int len, got_frame, framecount = 0;
while (av_read_frame(pFormatCtx, packet) >= 0) {
//AVPacket
len = avcodec_decode_video2(pCodeCtx, yuvFrame, &got_frame, packet);
//非零，正在解码
if (got_frame) {
LOGI("解码%d帧", framecount++);
//lock
//设置缓冲区的宽、高、像素格式
ANativeWindow_setBuffersGeometry(nativeWindow, pCodeCtx->width, pCodeCtx->height,
WINDOW_FORMAT_RGBA_8888);
ANativeWindow_lock(nativeWindow, &outBuffer, NULL);
//设置yuvFrame的缓冲区，像素格式
//rgb_fragme缓冲区与outBuffer.bits是同一块内存
avpicture_fill((AVPicture *) rgbFrame, outBuffer.bits, PIX_FMT_RGBA, pCodeCtx->width,
pCodeCtx->height);
//YUV->RGBA_8888
I420ToARGB(yuvFrame->data[0], yuvFrame->linesize[0],
yuvFrame->data[2], yuvFrame->linesize[2],
yuvFrame->data[1], yuvFrame->linesize[1],
rgbFrame->data[0], rgbFrame->linesize[0],
pCodeCtx->width, pCodeCtx->height);
//fix buffer
//unlock
ANativeWindow_unlockAndPost(nativeWindow);
usleep(1000 * 16);
}
av_free_packet(packet);
}
ANativeWindow_release(nativeWindow);
avcodec_close(pCodeCtx);
avformat_free_context(pFormatCtx);
(*env)->ReleaseStringUTFChars(env, input_jstr, input_cstr);
}
9、CMakeLists.txt
cmake_minimum_required(VERSION 3.4.1)
add_library(native-lib
SHARED
src/main/cpp/native-lib.c )
find_library(log-lib
log )
add_library(libavcodec-56
SHARED
IMPORTED)
set_target_properties(libavcodec-56
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libavcodec-56.so)
add_library(libavdevice-56
SHARED
IMPORTED)
set_target_properties(libavdevice-56
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libavdevice-56.so)
add_library(libavfilter-5
SHARED
IMPORTED)
set_target_properties(libavfilter-5
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libavfilter-5.so)
add_library(libavformat-56
SHARED
IMPORTED)
set_target_properties(libavformat-56
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libavformat-56.so)
add_library(libavutil-54
SHARED
IMPORTED)
set_target_properties(libavutil-54
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libavutil-54.so)
add_library(libpostproc-53
SHARED
IMPORTED)
set_target_properties(libpostproc-53
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libpostproc-53.so)
add_library(libswresample-1
SHARED
IMPORTED)
set_target_properties(libswresample-1
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libswresample-1.so)
add_library(libswscale-3
SHARED
IMPORTED)
set_target_properties(libswscale-3
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libswscale-3.so)
add_library(libyuv
SHARED
IMPORTED)
set_target_properties(libyuv
PROPERTIES IMPORTED_LOCATION
${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/armeabi/libyuv.so)
target_link_libraries( native-lib
android
libavcodec-56
libavdevice-56
libavfilter-5
libavformat-56
libavutil-54
libpostproc-53
libswresample-1
libswscale-3
libyuv
${log-lib} )
这样就可以播放视频了，支持的格式还挺多，比如mp4、mkv、avi、flv等格式都支持
我会在我的资源里边附上libyuv的源码和编译好的so文件
