流媒体/Mpeg4/MP4

开发平台：
Visual C++

Subtitles.cpp：源码内容
							/**************************************************************************************
 *                                                                                    *
 * This application contains code from OpenDivX and is released as a "Larger Work"    *
 * under that license. Consistant with that license, this application is released     *
 * under the GNU General Public License.                                              *
 *                                                                                    *
 * The OpenDivX license can be found at: http://www.projectmayo.com/opendivx/docs.php *
 * The GPL can be found at: http://www.gnu.org/copyleft/gpl.html                      *
 *                                                                                    *
 * Copyright (c) 2001 - Project Mayo                                                  *
 *                                                                                    *
 * Authors: Damien Chavarria <adrc at projectmayo.com>                                *
 *                                                                                    *
 **************************************************************************************/
#include "Subtitles.h"
/*
 * Subtitles class
 */
Subtitles::Subtitles() {
	this->input  = NULL;
	this->format = -1;
}
Subtitles::~Subtitles() {
}
int Subtitles::Open(char *aviFilename) {
	this->input = NULL;
	if(aviFilename) {
		char *subFilename;
		subFilename = (char *) malloc(strlen(aviFilename) - 2);
		
		strncpy(subFilename, aviFilename, strlen(aviFilename) - 3);
		subFilename[strlen(aviFilename) - 3]= '';
		strncat(subFilename, "sub", 3);
		/*
		 * only local subtitles are supported now
		 */
		this->input = new InputMedia();
		this->input->Open(subFilename, INPUT_OPEN_ASCII, INPUT_TYPE_FILE);
		if(!this->input->isOK())
			return 0;
		/*
		 * Now check the subtitles type
		 */
		char firstByte;
		this->input->Read(&firstByte, 1);
		this->input->Seek(0, INPUT_SEEK_SET);
		switch(firstByte) {
		case '[':
			/*
			 * SubViewer format (likely)
			 */
			return 0;
			break;
		case '{':
			/*
			 * Micro DVD format (likely)
			 */
			this->format = SUBTITLES_FORMAT_SUBVIEWER;
			break;
		default:
			return 0;
		}
		getNextSubtitle();
		return 1;
	}
	return 0;
}
int Subtitles::getNextSubtitle() {
	if(this->input->isOK()) {
		switch(this->format) {
		case SUBTITLES_FORMAT_SUBVIEWER:
			/*
			 * Find the corresponding string
			 * and get the text to display
			 */
			/*
			 * Seek to the next '{'
			 * and look at frame number
			 *
			 */
			char  dummy;
			DWORD frame;
			DWORD i;
			this->input->Read(&dummy, 1);
			while(dummy != '{') {
				this->input->Read(&dummy, 1);
			};
			/*
			 * Now we can get the frame number
			 */
			this->input->ScanF("%d", &this->firstFrame);
			
			this->input->ScanF("%c%c", &text);
			this->input->ScanF("%d", &this->lastFrame);
			this->input->ScanF("%c", &text);
			
			/*
			 * now read until the end of line
			 */
			memset(text, 0, 255);
			i=0;
			while(text[i-1] != 'n' && i < 255) {
				this->input->Read(&text[i], 1);
				i++;
			}
			return 1;
			break;
		default:
			this->firstFrame = 0x100000000;
			return 0;
		}
	}
	return 0;
}
int Subtitles::Apply(HWND hwnd, long frameNumber, double frameRate, int fullscreen) {
	if(this->input->isOK()) {
		if(frameNumber > this->lastFrame) {
		
			do {
				
				this->getNextSubtitle();
			}
			while(this->firstFrame < frameNumber);
		}
		HDC    hdc;
		HBRUSH brush;
		char  *secondLine;
		RECT   rect;
	
		hdc = GetDC(hwnd);
		SetBkMode(hdc, TRANSPARENT);
		GetClientRect( hwnd, &rect );
		/*
		 * squeeze rect so that
		 * we have space for controls
		 */
		rect.left   += 7;
		rect.right  -= 8;
		rect.top     = rect.bottom - 115 - 50;
		rect.bottom -= 115;
		if(fullscreen) {
			return 0;
		}
		brush = CreateSolidBrush(0); 
		SelectObject(hdc, brush);
		Rectangle(hdc, rect.left, rect.top, rect.right, rect.bottom); 
		if(frameNumber >= this->firstFrame && frameNumber <= this->lastFrame) {
			/*
			 * We can draw it
			 *
			 */
			SetTextColor(hdc, 0x00FFFFFF);
			secondLine = strchr(this->text, '|');
			if(secondLine == NULL) {
				TextOut(hdc, rect.left + ((rect.right - rect.left)/2) - 3*strlen(text), 
					    rect.top + (rect.bottom - rect.top)/2 - 6, this->text, strlen(this->text) - 1);
			}
			else {
				TextOut(hdc, rect.left + ((rect.right - rect.left)/2) - 3*(strlen(this->text) - strlen(secondLine)), 
					    rect.top + (rect.bottom - rect.top)/2 - 15, this->text, strlen(this->text) - strlen(secondLine));
				TextOut(hdc, rect.left + ((rect.right - rect.left)/2) - 3*(strlen(secondLine) - 2), 
					    rect.top + (rect.bottom - rect.top)/2, secondLine + 1, strlen(secondLine) - 2);
			}
		}
		DeleteDC(hdc);
	}
	return 0;
}
int Subtitles::Close() {
	if(this->input) {
		this->input->Close();
		delete this->input;
	}
	return 0;
}

						