/*
*一個簡單的混音demo，把文件a和文件b的音頻混為一個音頻流輸出并存為文件，只處理每個文件的第一個音頻流
*源代碼是網友Larry_Liang（1085803139）寫的，我?guī)推湔{試通過
*MK（821486004@qq.com）
*/


extern?“C“
{
#include?“l(fā)ibavcodec/avcodec.h“
#include?“l(fā)ibavformat/avformat.h“
#include?“l(fā)ibavdevice/avdevice.h“
#include?“l(fā)ibavfilter/avfilter.h“
#include?“l(fā)ibavfilter/avfiltergraph.h“
#include?“l(fā)ibavfilter/buffersink.h“
#include?“l(fā)ibavfilter/buffersrc.h“
#include?“l(fā)ibavutil/audio_fifo.h“
#include?“l(fā)ibavutil/avutil.h“
#include?“l(fā)ibavutil/fifo.h“
}

#pragma?comment（lib?“avcodec.lib“）
#pragma?comment（lib?“avformat.lib“）
#pragma?comment（lib?“avutil.lib“）
#pragma?comment（lib?“avdevice.lib“）
#pragma?comment（lib?“avfilter.lib“）

//#pragma?comment（lib?“avfilter.lib“）
//#pragma?comment（lib?“postproc.lib“）
//#pragma?comment（lib?“swresample.lib“）
#pragma?comment（lib?“swscale.lib“）

#include?
#include?
#include?

enum?CaptureState
{
	PREPARED
	RUNNING
	STOPPED
	FINISHED
};

?typedef?struct?BufferSourceContext?{
?	const?AVClass????*bscclass;
?	AVFifoBuffer?????*fifo;
?	AVRational????????time_base;?????///se?to?set?in?the?output?link
?	AVRational????????frame_rate;????///ame_rate?to?set?in?the?output?link
?	unsigned??????????nb_failed_requests;
?	unsigned??????????warning_limit;
?
?	/*?video?only?*/
?	int???????????????w?h;
?	enum?AVPixelFormat??pix_fmt;
?	AVRational????????pixel_aspect;
?	char??????????????*sws_param;
?
?	AVBufferRef?*hw_frames_ctx;
?
?	/*?audio?only?*/
?	int?sample_rate;
?	enum?AVSampleFormat?sample_fmt;
?	int?channels;
?	uint64_t?channel_layout;
?	char????*channel_layout_str;
?
?	int?got_format_from_params;
?	int?eof;
?}?BufferSourceContext;

AVFormatContext*?_fmt_ctx_spk?=?NULL;
AVFormatContext*?_fmt_ctx_mic?=?NULL;
AVFormatContext*?_fmt_ctx_out?=?NULL;
int?_index_spk?=?-1;
int?_index_mic?=?-1;
int?_index_a_out?=?-1;

AVFilterGraph*?_filter_graph?=?NULL;
AVFilterContext*?_filter_ctx_src_spk?=?NULL;
AVFilterContext*?_filter_ctx_src_mic?=?NULL;
AVFilterContext*?_filter_ctx_sink?=?NULL;

CaptureState?_state?=?CaptureState::PREPARED;

CRITICAL_SECTION?_section_spk;
CRITICAL_SECTION?_section_mic;
AVAudioFifo*?_fifo_spk?=?NULL;
AVAudioFifo*?_fifo_mic?=?NULL;

void?InitRecorder（）
{
	av_register_all（）;
	avdevice_register_all（）;
	avfilter_register_all（）;
}

int?OpenSpeakerInput（char*?inputForamt?char*?url）
{
	AVInputFormat*?ifmt?=?av_find_input_format（inputForamt）;
	AVDictionary*?opt1?=?NULL;
	av_dict_set（&opt1?“rtbufsize“?“10M“?0）;

	int?ret?=?0;
	ret?=?avformat_open_input（&_fmt_ctx_spk?url?ifmt?&opt1）;
	if?（ret?	{
		printf（“Speaker:?failed?to?call?avformat_open_input\n“）;
		return?-1;
	}
	ret?=?avformat_find_stream_info（_fmt_ctx_spk?NULL）;
	if?（ret?	{
		printf（“Speaker:?failed?to?call?avformat_find_stream_info\n“）;
		return?-1;
	}
	for?（int?i?=?0;?i?nb_streams;?i++）
	{
		if?（_fmt_ctx_spk->streams[i]->codec->codec_type?=

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????44032??2016-11-08?10:54??TestMixAudio\Debug\TestMixAudio.exe

?????文件?????468660??2016-11-08?10:54??TestMixAudio\Debug\TestMixAudio.ilk

?????文件?????683008??2016-11-08?10:54??TestMixAudio\Debug\TestMixAudio.pdb

?????文件???18936320??2014-05-06?10:08??TestMixAudio\TestMixAudio\avcodec-55.dll

?????文件????1340928??2014-05-06?10:08??TestMixAudio\TestMixAudio\avdevice-55.dll

?????文件????2034688??2014-05-06?10:08??TestMixAudio\TestMixAudio\avfilter-4.dll

?????文件????5342720??2014-05-06?10:08??TestMixAudio\TestMixAudio\avformat-55.dll

?????文件?????418304??2014-05-06?10:08??TestMixAudio\TestMixAudio\avutil-52.dll

?????文件????????682??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\cl.command.1.tlog

?????文件??????21078??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\CL.read.1.tlog

?????文件????????384??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\CL.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link-cvtres.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link-cvtres.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.11536-cvtres.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.11536-cvtres.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.11536.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.11536.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.7100-cvtres.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.7100-cvtres.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.7100.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.7100.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.9888-cvtres.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.9888-cvtres.write.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.9888.read.1.tlog

?????文件??????????2??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.9888.write.1.tlog

?????文件???????1584??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.command.1.tlog

?????文件???????3888??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.read.1.tlog

?????文件????????866??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\link.write.1.tlog

?????文件????????430??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\mt.command.1.tlog

?????文件????????470??2016-11-08?10:54??TestMixAudio\TestMixAudio\Debug\mt.read.1.tlog

............此處省略140個文件信息