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    文件類型: .zip
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    發(fā)布日期: 2023-07-01
  • 語(yǔ)言: Matlab
  • 標(biāo)簽: MATLAB??mmread??

資源簡(jiǎn)介

MATLAB工具包mmread函數(shù)mmread.zip

資源截圖

代碼片段和文件信息 

/***************************************************
This?is?the?main?Grabber?code.??It?uses?AVbin?and?ffmpeg
to?capture?video?and?audio?from?video?and?audio?files.

The?code?supports?any?number?of?audio?or?video?streams?and
is?a?cross?platform?solution?to?replace?DDGrab.cpp.

This?code?was?intended?to?be?used?inside?of?a?matlab?interface
but?can?be?used?as?a?generic?grabber?class?for?anyone?who?needs
one.

Copyright?2008?Micah?Richert

This?file?is?part?of?mmread.
**************************************************/

#ifdef?MATLAB_MEX_FILE
#include?“mex.h“
#define?FFprintf（...）?mexPrintf（__VA_ARGS__）
#else
#define?FFprintf（...）?printf（__VA_ARGS__）
#endif

//#ifndef?mwSize
//#define?mwSize?int
//#endif

#define?DEBUG?0

extern?“C“?{
	#include?
	#include?

	struct?_AVbinFile?{
	????AVFormatContext?*context;
	????AVPacket?*packet;
	};

	struct?_AVbinStream?{
		int?type;
		AVFormatContext?*format_context;
		AVCodecContext?*codec_context;
		AVframe?*frame;
	};
}

#include?
#include?
#include?
#include?
using?namespace?std;

#include?
#include?
#include?

map?keyframes;
unsigned?int?startDecodingAt;

class?Grabber
{
public:
	Grabber（bool?isAudio?AVbinStream*?stream?bool?trySeeking?double?rate?int?bytesPerWORD?AVbinStreamInfo?info?AVbinTimestamp?start_time）
	{
		this->stream?=?stream;
		frameNr?=?0;
		packetNr?=?0;
		done?=?false;
		this->bytesPerWORD?=?bytesPerWORD;
		this->rate?=?rate;
		startTime?=?0;
		stopTime?=?0;
		this->isAudio?=?isAudio;
		this->info?=?info;
		this->trySeeking?=?trySeeking;
		this->start_time?=?start_time>0?start_time:0;
	};

	~Grabber（）
	{
		//?clean?up?any?remaining?memory...
		if?（DEBUG）?FFprintf（“freeing?frame?data...\n“）;
		for?（vector::iterator?i=frames.begin（）;i?!=?frames.end（）;?i++）?free（*i）;
	}

	AVbinStream*?stream;
	AVbinStreamInfo?info;
	AVbinTimestamp?start_time;

	vector?frames;
	vector?frameBytes;
	vector?frameTimes;

	vector?frameNrs;

	unsigned?int?frameNr;
	unsigned?int?packetNr;
	bool?done;
	bool?isAudio;
	bool?trySeeking;

	int?bytesPerWORD;
	double?rate;
	double?startTime?stopTime;

	int?Grab（AVbinPacket*?packet）
	{
		if?（done）?return?0;
		if?（!packet->data）?return?1;

		frameNr++;
		packetNr++;
		if?（DEBUG）?FFprintf（“frameNr?%d?%d?%d\n“frameNrpacketNrpacket->size）;
		int?offset=0?len=0;
		double?timestamp?=?（packet->timestamp-start_time）/1000.0/1000.0;
		if?（DEBUG）?FFprintf（“time?%lld?%lld?%lf\n“packet->timestampstart_timetimestamp）;

		//?either?no?frames?are?specified?（capture?all）?or?we?have?time?specified
		if?（stopTime）
		{
			if?（isAudio）
			{
				//?time?is?being?used...
				if?（timestamp?>=?startTime）
				{
					//?if?we‘ve?reached?the?start...
					offset?=?max（0（（int）（（startTime-ti

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件???????28788??2009-10-15?20:28??FFGrab.cpp
?????文件???????44571??2009-10-15?19:49??FFGrab.mexa64
?????文件???????42230??2009-10-15?20:06??FFGrab.mexglx
?????文件???????39196??2009-10-15?20:20??FFGrab.mexmac
?????文件???????42192??2009-10-15?20:20??FFGrab.mexmaci
?????文件???????39328??2009-10-15?20:20??FFGrab.mexmaci64
?????文件??????137998??2009-10-15?20:14??FFGrab.mexw32
?????文件??????756917??2009-11-12?19:11??FFGrab.mexw64
?????文件?????3077178??2009-05-18?18:37??avbin.dll
?????文件?????4660639??2009-05-19?18:44??avbin64.dll
?????文件?????9536816??2009-05-18?15:20??libavbin.dylib
?????文件?????4326671??2009-09-25?19:35??libavbin.so
?????文件?????4326470??2009-10-10?03:34??libavbin.so.32
?????文件?????3711574??2009-10-10?03:44??libavbin.so.64
?????文件???????10131??2007-07-28?02:24??mexDDGrab.cpp
?????文件???????77824??2008-10-13?14:36??mexDDGrab.dll
?????文件???????77824??2008-10-13?14:36??mexDDGrab.mexw32
?????文件??????106496??2008-04-28?19:12??mexDDGrab.mexw64
?????文件???????25976??2009-10-15?20:08??mmread.m
?????文件????????3205??2008-12-02?02:36??processframe.m
?????文件????????1313??2014-02-12?12:59??license.txt

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