继续看雷霄骅的 课程资料 - 基于FFmpeg+SDL的视频播放器的制作
最后一篇,主要是想学一下 MFC 创建和配置。
1>------ 已启动生成: 项目: MFC, 配置: Debug Win32 ------
1>MFCDlg.cpp
1>d:\zslfchenjuke\work2017\mfc\mfc\mfc\mfcdlg.cpp(161): error C2665: “AfxMessageBox”: 2 个重载中没有一个可以转换所有参数类型
1>c:\program files (x86)\microsoft visual studio\2017\enterprise\vc\tools\msvc\14.10.25017\atlmfc\include\afxwin.h(6544): note: 可能是“int AfxMessageBox(UINT,UINT,UINT)”
1>c:\program files (x86)\microsoft visual studio\2017\enterprise\vc\tools\msvc\14.10.25017\atlmfc\include\afxwin.h(6542): note: 或 “int AfxMessageBox(LPCTSTR,UINT,UINT)”
1>d:\zslfchenjuke\work2017\mfc\mfc\mfc\mfcdlg.cpp(161): note: 尝试匹配参数列表“(const char [12])”时
1>已完成生成项目“MFC.vcxproj”的操作 - 失败。
========== 生成: 成功 0 个,失败 1 个,最新 0 个,跳过 0 个 ==========
解决方法:
extern "C"
{
#include "libavcodec/avcodec.h"
};
void CMFCDlg::OnBnClickedFiledialog()
{
// TODO: 在此添加控件通知处理程序代码
CString str2;
str2.Format(_T("%s"),avcodec_configuration());
AfxMessageBox((str2));
}
调试结果如下,有信息但是乱码。说明配置是没问题的。但是上面的程序可能是有问题的。
// MFCDlg.cpp : 实现文件
//
#include "stdafx.h"
#include "MFC.h"
#include "MFCDlg.h"
#include "afxdialogex.h"
#include
#define __STDC_CONSTANT_MACROS
//FFmepg+SDL 相关头文件
#ifdef _WIN32
//Windows
extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "SDL2/SDL.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include
#include
#include
#include
#ifdef __cplusplus
};
#endif
#endif
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// 用于应用程序“关于”菜单项的 CAboutDlg 对话框
class CAboutDlg : public CDialogEx
{
public:
CAboutDlg();
// 对话框数据
#ifdef AFX_DESIGN_TIME
enum { IDD = IDD_ABOUTBOX };
#endif
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持
// 实现
protected:
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()
// CMFCDlg 对话框
CMFCDlg::CMFCDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(IDD_MFC_DIALOG, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMFCDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
DDX_Control(pDX, IDC_URL, m_url); //xlh
}
BEGIN_MESSAGE_MAP(CMFCDlg, CDialogEx)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_PLAY, &CMFCDlg::OnBnClickedPlay)
ON_BN_CLICKED(IDC_ABORT, &CMFCDlg::OnBnClickedAbort)
ON_BN_CLICKED(IDC_FILEDIALOG, &CMFCDlg::OnBnClickedFiledialog)
ON_EN_CHANGE(IDC_URL, &CMFCDlg::OnEnChangeUrl)
ON_BN_CLICKED(IDC_PAUSE, &CMFCDlg::OnBnClickedPause)
ON_BN_CLICKED(IDC_STOP, &CMFCDlg::OnBnClickedStop)
ON_STN_CLICKED(IDC_SCREEN, &CMFCDlg::OnStnClickedScreen)
END_MESSAGE_MAP()
// CMFCDlg 消息处理程序
BOOL CMFCDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// 将“关于...”菜单项添加到系统菜单中。
// IDM_ABOUTBOX 必须在系统命令范围内。
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
BOOL bNameValid;
CString strAboutMenu;
bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
ASSERT(bNameValid);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// 设置此对话框的图标。 当应用程序主窗口不是对话框时,框架将自动
// 执行此操作
SetIcon(m_hIcon, TRUE); // 设置大图标
SetIcon(m_hIcon, FALSE); // 设置小图标
// TODO: 在此添加额外的初始化代码
return TRUE; // 除非将焦点设置到控件,否则返回 TRUE
}
void CMFCDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialogEx::OnSysCommand(nID, lParam);
}
}
// 如果向对话框添加最小化按钮,则需要下面的代码
// 来绘制该图标。 对于使用文档/视图模型的 MFC 应用程序,
// 这将由框架自动完成。
void CMFCDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // 用于绘制的设备上下文
SendMessage(WM_ICONERASEBKGND, reinterpret_cast(dc.GetSafeHdc()), 0);
// 使图标在工作区矩形中居中
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// 绘制图标
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialogEx::OnPaint();
}
}
//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CMFCDlg::OnQueryDragIcon()
{
return static_cast(m_hIcon);
}
//FFmpeg+SDL 相关代码
//Refresh Event
#define SFM_REFRESH_EVENT (SDL_USEREVENT + 1)
#define SFM_BREAK_EVENT (SDL_USEREVENT + 2)
int thread_exit = 0;
int thread_pause = 0;
int sfp_refresh_thread(void *opaque) {
thread_exit = 0;
thread_pause = 0;
while (thread_exit == 0) {
if (!thread_pause) {
SDL_Event event;
event.type = SFM_REFRESH_EVENT;
SDL_PushEvent(&event);
}
SDL_Delay(40);
}
//Quit
SDL_Event event;
event.type = SFM_BREAK_EVENT;
SDL_PushEvent(&event);
thread_exit = 0;
thread_pause = 0;
return 0;
}
//main 函数改为 ffmpegplayer
int ffmpegplayer(LPVOID lpParam)
{
AVFormatContext *pFormatCtx;
int i, videoindex;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame, *pFrameYUV;
uint8_t *out_buffer;
AVPacket *packet;
int ret, got_picture;
//------------SDL----------------
int screen_w, screen_h;
SDL_Window *screen;
SDL_Renderer* sdlRenderer;
SDL_Texture* sdlTexture;
SDL_Rect sdlRect;
SDL_Thread *video_tid;
SDL_Event event;
struct SwsContext *img_convert_ctx;
//===========================================
//文件路径改为如下:
CMFCDlg *dlg = (CMFCDlg *)lpParam;
char filepath[250] = { 0 };
GetWindowTextA(dlg->m_url, (LPSTR)filepath, 250);
//===========================================
av_register_all();
avformat_network_init();
pFormatCtx = avformat_alloc_context();
if (avformat_open_input(&pFormatCtx, filepath, NULL, NULL) != 0) {
AfxMessageBox(_T("Couldn't open input stream.\n"));
return -1;
}
if (avformat_find_stream_info(pFormatCtx, NULL)<0) {
AfxMessageBox(_T("Couldn't find stream information.\n"));
return -1;
}
videoindex = -1;
for (i = 0; inb_streams; i++)
if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
videoindex = i;
break;
}
if (videoindex == -1) {
AfxMessageBox(_T("Didn't find a video stream.\n"));
return -1;
}
pCodecCtx = pFormatCtx->streams[videoindex]->codec;
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (pCodec == NULL) {
AfxMessageBox(_T("Codec not found.\n"));
return -1;
}
if (avcodec_open2(pCodecCtx, pCodec, NULL)<0) {
AfxMessageBox(_T("Could not open codec.\n"));
return -1;
}
pFrame = av_frame_alloc();
pFrameYUV = av_frame_alloc();
out_buffer = (uint8_t *)av_malloc(avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt,
pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER)) {
AfxMessageBox(_T("Could not initialize SDL\n"));
return -1;
}
//SDL 2.0 Support for multiple windows
screen_w = pCodecCtx->width;
screen_h = pCodecCtx->height;
//显示在弹出窗口
//screen = SDL_CreateWindow("Simplest ffmpeg player's Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
// screen_w, screen_h,SDL_WINDOW_OPENGL);
//===========================================
//显示在MFC控件上
screen = SDL_CreateWindowFrom(dlg->GetDlgItem(IDC_SCREEN)->GetSafeHwnd());
//===========================================
if (!screen) {
AfxMessageBox(_T("SDL: could not create window - exiting\n"));
return -1;
}
sdlRenderer = SDL_CreateRenderer(screen, -1, 0);
//IYUV: Y + U + V (3 planes)
//YV12: Y + V + U (3 planes)
sdlTexture = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING, pCodecCtx->width, pCodecCtx->height);
sdlRect.x = 0;
sdlRect.y = 0;
sdlRect.w = screen_w;
sdlRect.h = screen_h;
packet = (AVPacket *)av_malloc(sizeof(AVPacket));
video_tid = SDL_CreateThread(sfp_refresh_thread, NULL, NULL);
//------------SDL End------------
//Event Loop
for (;;) {
//Wait
SDL_WaitEvent(&event);
if (event.type == SFM_REFRESH_EVENT) {
//------------------------------
if (av_read_frame(pFormatCtx, packet) >= 0) {
if (packet->stream_index == videoindex) {
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if (ret < 0) {
AfxMessageBox(_T("Decode Error.\n"));
return -1;
}
if (got_picture) {
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
//SDL---------------------------
SDL_UpdateTexture(sdlTexture, NULL, pFrameYUV->data[0], pFrameYUV->linesize[0]);
SDL_RenderClear(sdlRenderer);
//SDL_RenderCopy( sdlRenderer, sdlTexture, &sdlRect, &sdlRect );
SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
SDL_RenderPresent(sdlRenderer);
//SDL End-----------------------
TRACE("Decode 1 frame\n");
}
}
av_free_packet(packet);
}
else {
//Exit Thread
thread_exit = 1;
}
}
else if (event.type == SDL_QUIT) {
thread_exit = 1;
}
else if (event.type == SFM_BREAK_EVENT) {
break;
}
}
sws_freeContext(img_convert_ctx);
SDL_DestroyWindow(screen);
SDL_Quit();
//FIX Small Bug
//SDL Hide Window When it finished
dlg->GetDlgItem(IDC_SCREEN)->ShowWindow(SW_SHOWNORMAL);
//--------------
av_frame_free(&pFrameYUV);
av_frame_free(&pFrame);
avcodec_close(pCodecCtx);
avformat_close_input(&pFormatCtx);
return 0;
}
//播放的线程
UINT Thread_Play(LPVOID lpParam) {
CMFCDlg *dlg = (CMFCDlg *)lpParam;
ffmpegplayer(lpParam);
return 0;
}
//播放
void CMFCDlg::OnBnClickedPlay()
{
// TODO: 在此添加控件通知处理程序代码
pThreadPlay = AfxBeginThread(Thread_Play, this);//开启线程
}
//关于
void CMFCDlg::OnBnClickedAbort()
{
// TODO: 在此添加控件通知处理程序代码
CAboutDlg dlg1;
dlg1.DoModal();
}
//文件
void CMFCDlg::OnBnClickedFiledialog()
{
// TODO: 在此添加控件通知处理程序代码
CString FilePathName;
CFileDialog dlg(TRUE, NULL, NULL, NULL, NULL);///TRUE为OPEN对话框,FALSE为SAVE AS对话框
if (dlg.DoModal() == IDOK) {
FilePathName = dlg.GetPathName();
m_url.SetWindowText(FilePathName);
}
}
//文件路径
void CMFCDlg::OnEnChangeUrl()
{
// TODO: 如果该控件是 RICHEDIT 控件,它将不
// 发送此通知,除非重写 CDialogEx::OnInitDialog()
// 函数并调用 CRichEditCtrl().SetEventMask(),
// 同时将 ENM_CHANGE 标志“或”运算到掩码中。
// TODO: 在此添加控件通知处理程序代码
}
//暂停
void CMFCDlg::OnBnClickedPause()
{
// TODO: 在此添加控件通知处理程序代码
thread_pause = !thread_pause;
}
//停止
void CMFCDlg::OnBnClickedStop()
{
// TODO: 在此添加控件通知处理程序代码
thread_exit = 1;
}
//视频窗口
void CMFCDlg::OnStnClickedScreen()
{
// TODO: 在此添加控件通知处理程序代码
}
// MFCDlg.h : 头文件
//
#pragma once
// CMFCDlg 对话框
class CMFCDlg : public CDialogEx
{
// 构造
public:
CMFCDlg(CWnd* pParent = NULL); // 标准构造函数
// 对话框数据
#ifdef AFX_DESIGN_TIME
enum { IDD = IDD_MFC_DIALOG };
#endif
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持
// 实现
protected:
HICON m_hIcon;
CWinThread *pThreadPlay;
// 生成的消息映射函数
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
DECLARE_MESSAGE_MAP()
public:
afx_msg void OnBnClickedPlay();
afx_msg void OnBnClickedAbort();
afx_msg void OnBnClickedFiledialog();
afx_msg void OnEnChangeUrl();
afx_msg void OnBnClickedPause();
afx_msg void OnBnClickedStop();
afx_msg void OnBnClickedCancel();
afx_msg void OnStnClickedScreen();
CEdit m_url;
};