more code about transcode

@@ -8,7 +8,8 @@ _cur_a_ts_ms(INT64_MAX),
 _cur_v_ts_ms(INT64_MAX),
 _end_time_ms(0),
 _cur_a_frame(NULL),
-_cur_v_frame(NULL)
+_cur_v_frame(NULL),
+_media_role(mr_student)
 {
 }
 
@@ -19,6 +20,7 @@ CAVDecoder::~CAVDecoder()
 
 int CAVDecoder::add(media_info &info)
 {
+	_media_role = info.m_role;
 	if (info.m_type == mt_audio) {
 		_a_start_time_ms = info.start_time_ms;
 		_a_end_time_ms = info.end_time_ms;

@@ -15,7 +15,10 @@ public:
 	bool get_one_v_frame();
 	int64_t _cur_a_ts_ms;
 	int64_t _cur_v_ts_ms;
+	media_role _media_role;
 
+	AVFrame * _cur_a_frame;
+	AVFrame * _cur_v_frame;
 protected:
 	list<media_info> _video_info;
 	list<media_info> _audio_info;
@@ -26,8 +29,7 @@ protected:
 	int64_t _v_start_time_ms;
 	int64_t _v_end_time_ms;
 	int64_t _end_time_ms;
-	AVFrame * _cur_a_frame;
-	AVFrame * _cur_v_frame;
+
 private:
 	AVFrame * get_blank_frame();
 	AVFrame * get_silence_frame();

@@ -3,8 +3,16 @@
 
 CAVTranscoder::CAVTranscoder():
 _start_time(INT64_MAX),
-_all_processed(true)
+_all_processed(true),
+_one2one(false),
+_nOutputWidth(320)
 {
+	if (_one2one) {
+		_nOutputHeight = 480;
+	}
+	else {
+		_nOutputHeight = 240;
+	}
 }
 
 
@@ -38,7 +46,7 @@ int CAVTranscoder::add(media_info & info)
 int64_t CAVTranscoder::transcode()
 {
 	vector<CAVDecoder *> decoders_got_frame;
-	vector < CAVDecoder *>::iterator it = _decoders.begin();
+	vector <CAVDecoder *>::iterator it = _decoders.begin();
 	for (; it != _decoders.end();) {
 		if((*it)->get_one_v_frame()){
 			decoders_got_frame.push_back(*it);
@@ -201,6 +209,16 @@ int CAVTranscoder::open_output_file(const char *filename)
 
 	int CAVTranscoder::mix_and_output_vframe(vector<CAVDecoder *> & decoders_got_frame)
 	{
+		if (_one2one){
+			return mix_and_output_one2one_vframe(decoders_got_frame);
+		}
+		else {
+			return  mix_and_output_one2many_vframe(decoders_got_frame);
+		}
+	}
+
+	int CAVTranscoder::mix_and_output_aframe(vector<CAVDecoder *> & decoders_got_frame)
+	{
 		vector < CAVDecoder *>::iterator it = decoders_got_frame.begin();
 		for (; it != decoders_got_frame.end(); it++) {
 			(*it)->free_cur_a_frame();
@@ -208,17 +226,37 @@ int CAVTranscoder::open_output_file(const char *filename)
 		return 0;
 	}
 
-	int CAVTranscoder::mix_and_output_aframe(vector<CAVDecoder *> & decoders_got_frame)
+	int CAVTranscoder::mix_and_output_one2many_vframe(vector<CAVDecoder *> & decoders_got_frame)
 	{
-		vector < CAVDecoder *>::iterator it = decoders_got_frame.begin();
-		for (; it != decoders_got_frame.end(); it++) {
-			(*it)->free_cur_v_frame();
+		return 0;
+	}
+
+	int CAVTranscoder::fillDestFrame(AVFrame * pDstFrame, AVFrame * pSrcFrame, int x, int y)
+	{
+		
+	}
+
+	int CAVTranscoder::mix_and_output_one2one_vframe(vector<CAVDecoder *> & decoders_got_frame)
+	{
+		//prepare one2one base frame
+		AVFrame *pDstFrame = av_frame_alloc();
+		int nDstSize = avpicture_get_size(AV_PIX_FMT_YUV420P,_nOutputWidth, _nOutputHeight);
+		uint8_t *dstbuf = new uint8_t[nDstSize];
+		avpicture_fill((AVPicture*)pDstFrame, dstbuf, AV_PIX_FMT_YUV420P, _nOutputWidth, _nOutputHeight);
+		if (decoders_got_frame.size() == 2){
+			fillDestFrame(pDstFrame, decoders_got_frame[0]->_cur_v_frame, 0, decoders_got_frame[0]->_media_role == mr_teacher ? 0 : 240);
+			fillDestFrame(pDstFrame, decoders_got_frame[1]->_cur_v_frame, 0, decoders_got_frame[1]->_media_role == mr_teacher ? 0 : 240);
+		}
+		else {
+			fillDestFrame(pDstFrame, decoders_got_frame[0]->_cur_v_frame, 0, 0);
 		}
 		return 0;
 	}
 
-	int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) {
-		int ret;
+int encode_write_frame(AVFrame *filt_frame, unsigned int stream_index, int *got_frame) {
+
+
+	int ret;
 	int got_frame_local;
 	AVPacket enc_pkt;
 #if 0

@@ -23,9 +23,17 @@ protected:
 	int64_t _start_time;
 	int64_t _cur_a_time;
 	int64_t _cur_v_time;
+	int _nOutputWidth;
+	int _nOutputHeight;
+
 private:
 	int mix_and_output_vframe(vector<CAVDecoder *> & decoders_got_frame);
 	int mix_and_output_aframe(vector<CAVDecoder *> & decoders_got_frame);
 	bool _all_processed;
+	bool _one2one;
+	int mix_and_output_one2one_vframe(vector<CAVDecoder *> & decoders_got_frame);
+	int mix_and_output_one2many_vframe(vector<CAVDecoder *> & decoders_got_frame);
+
+	int fillDestFrame(AVFrame * pDstFrame, AVFrame * pSrcFrame, int x, int y);
 };