/**
**?作者：pengwz
**?http://blog.csdn.net/zhoubotong2012
**?郵箱：1795387053@qq.com
**/

#include?“stdafx.h“
#include?“FFMediaInfoReader.h“
#include?
//#include?

string?to_string（int?n）
{
	std::ostringstream?stm;
	string?str;
	stm?<	str?=?stm.str（）;
	//std::cout?<	return?str;
}


//////////////////////////////////////////////////////////////

FFMediaInfoReader::FFMediaInfoReader（）
{
????m_stop_status?=?false;

????m_inputAVFormatCxt?=?nullptr;

????m_videoStreamIndex?=?-1;
	m_audioStreamIndex?=?-1;

	m_bInited?=?FALSE;
????m_width?=?m_height?=?0;
????m_frame_rate?=?25;
????m_video_frame_count?=?0;
	m_audio_samplerate?=?0;
	m_audio_channels?=?0;

	?/*?register?all?codecs?demux?and?protocols?*/
????avcodec_register_all（）;
????av_register_all（）;
}

FFMediaInfoReader::~FFMediaInfoReader（）
{
	CloseFileStream（）;
}


BOOL?FFMediaInfoReader::OpenFileStream（const?char*?szFilePath）
{
????m_filePath???=?szFilePath;
????m_video_frame_count?=?0;
????m_videoStreamIndex?=?-1;
	m_audioStreamIndex?=?-1;
	m_vcodec_name?=?““;
	m_acodec_name?=?““;
	m_width?=?m_height?=?0;
????m_audio_samplerate?=?0;
	m_audio_channels?=?0;
????m_video_frame_count?=?0;
????m_bInited?=?FALSE;

	return?openMediaFile（）;
}


void?FFMediaInfoReader::CloseFileStream（）
{
????m_stop_status?=?true;

????closeMediaFile（）;
????m_bInited?=?FALSE;
}


//打開輸入文件
BOOL?FFMediaInfoReader::openMediaFile（）
{
????if?（m_inputAVFormatCxt）
????{
????????TRACE（“already?has?input?avformat?\n“）;
		return?FALSE;
????}

????int?res?=?0;

????if?（（res?=?avformat_open_input（&m_inputAVFormatCxt?m_filePath.c_str（）?0?NULL））?????{
??
????}
????
????if（res?????{
????????string?strError?=?“can?not?open?file:“?+?m_filePath?+?“errcode:“?+?to_string（res）?+?“err?msg:“?+?av_make_error_string（m_tmpErrString?AV_ERROR_MAX_STRING_SIZE?res）;
		TRACE（“--------------%s?\n“?strError.c_str（））;
		return?FALSE;
????}

????if?（avformat_find_stream_info（m_inputAVFormatCxt?0）?????{
????????TRACE（“can?not?find?stream?info?\n“）;
		return?FALSE;
????}

	TRACE（“filepath:?%s?format:?%s?Bitrate:?%d?Kbps?\n“??m_filePath.c_str（）?m_inputAVFormatCxt->iformat->name?m_inputAVFormatCxt->bit_rate/1000）;

????av_dump_format（m_inputAVFormatCxt?0?m_filePath.c_str（）?0）;
????for?（int?i?=?0;?i?nb_streams;?i++）
????{
????????AVStream?*in_stream?=?m_inputAVFormatCxt->streams[i];

		if?（in_stream->codec->codec_type?==?AVMEDIA_TYPE_VIDEO）
		{
			m_videoStreamIndex?=?i;

			m_width?=?in_stream->codec->width;
			m_height?=?in_stream->codec->height;

			if（in_stream->avg_frame_rate.den?!=?0?&&?in_stream->avg_frame_rate.num?!=?0）
			{
			??m_frame_rate?=?in_stream->avg_frame_rate.num/in_stream->avg_frame_rate.den;//每秒多少幀?
			}

			m_video_frame_count?=?in_stream->nb_frames;?//視頻幀數(shù)

			//m_vcodec_name?=?in_stream->codec->codec_name;?//獲取編碼器名稱。不行，

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-10-27?10:29??MediaFileInfoList\
?????目錄???????????0??2019-10-27?10:29??MediaFileInfoList\Debug\
?????文件????22285824??2018-04-15?08:51??MediaFileInfoList\Debug\avcodec-57.dll
?????文件?????6437376??2018-04-15?08:51??MediaFileInfoList\Debug\avfilter-6.dll
?????文件?????3991552??2018-04-15?08:51??MediaFileInfoList\Debug\avformat-57.dll
?????文件??????693248??2018-04-15?08:51??MediaFileInfoList\Debug\avutil-55.dll
?????文件???????23730??2019-10-27?10:00??MediaFileInfoList\Debug\BuildLog.htm
?????文件??????388096??2019-10-27?10:28??MediaFileInfoList\Debug\MediaFileInfoList.exe
?????文件??????116224??2018-04-15?08:51??MediaFileInfoList\Debug\postproc-54.dll
?????文件??????324096??2018-04-15?08:51??MediaFileInfoList\Debug\swresample-2.dll
?????文件??????504320??2018-04-15?08:51??MediaFileInfoList\Debug\swscale-4.dll
?????文件????????7002??2019-10-27?10:00??MediaFileInfoList\FFMediaInfoReader.cpp
?????文件????????2907??2019-10-27?09:51??MediaFileInfoList\FFMediaInfoReader.h
?????文件????????5694??2016-05-12?11:36??MediaFileInfoList\FileInfo.cpp
?????文件????????1285??2016-05-12?09:48??MediaFileInfoList\FileInfo.h
?????文件????????1209??2019-10-26?17:21??MediaFileInfoList\FuncUtils.cpp
?????文件?????????549??2019-10-26?17:21??MediaFileInfoList\FuncUtils.h
?????目錄???????????0??2019-10-26?16:44??MediaFileInfoList\include\
?????文件????????5729??2018-04-15?08:48??MediaFileInfoList\include\inttypes.h
?????目錄???????????0??2019-10-26?16:44??MediaFileInfoList\include\libavcodec\
?????文件??????217772??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\avcodec.h
?????文件????????2570??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\avdct.h
?????文件????????3111??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\avfft.h
?????文件????????2853??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\d3d11va.h
?????文件????????4044??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\dirac.h
?????文件????????3715??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\dv_profile.h
?????文件????????2361??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\dxva2.h
?????文件????????1650??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\jni.h
?????文件????????2825??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\mediacodec.h
?????文件????????3763??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\qsv.h
?????文件????????4550??2018-04-15?08:48??MediaFileInfoList\include\libavcodec\vaapi.h
............此處省略137個(gè)文件信息