myvtm/Other/libvideoframework/videortp.c

#include "precompile.h"
#include "videortp.h"
#include "videocommon.h"
#include "bs.h"

#ifdef RVC_OS_WIN
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <semaphore.h>
#endif // RVC_OS_WIN

#include <assert.h>
#include <malloc.h>

#include <stdint.h>

#include "list.h"
#include "rtp.h"
#include "rtpsession.h"
#include "memutil.h"
#include "../rvcmediacommon/rvc_media_common.h"
#include "x264.h"

#include "video_common/ffmpeg_api_adapter.h"
#include "video_coding/video_encoder_api.h"
#include "video_coding/video_decoder.h"
#include "video_coding/base/video_coding_clock.h"
#include "video_coding/base/video_coding_log.h"

#include "congestion_control/sim_transport/sim_external.h"

#include "adaptive_jitter_buffer/video_jbuff_api.h"
#include "adaptive_jitter_buffer/video_jbuff_log.h"

#include "rtp_header_extension/rtp_header_extension_api.h"
#include "h264_packetizer/h264_packetizer.h"


#include "video_statics/video_stats.h"
#include "video_common/videodebugfile.h"

//接收缓冲区要大于MAX_MTU_SIZE，还要存储rtp头、udp头等
#define MAX_RECV_BUFFER_SIZE 1500
#define MAX_PLAYLOAD_SIZE 1400
#define MAX_ASSEMBLE_EXTRA_SIZE 128


#define FRAME_WIN_SIZE	20
#define RTP_SEQ_GT(x, y, n) ((x > y && x-y<=n) || (y+n<n && x<=y+n))
#define RTP_MAX_JUMP 128
#define DIR_TX 1
#define DIR_RX 2
#define DIR_NONE 0
#define DIR_BOTH 3
#define VIDEO_CLOCK 90000
#define PEER_UPDATE_INTERVAL	1500 // ms
#define FIRST_KEY_FRAME_SIZE	40


//DEBUG log开关
#define DEBUG_TX 0
#define DEBUG_ENCODER 0
#define DEBUG_RX 0
#define DEBUG_DECODER 0
#define DEBUG_CC 0

typedef unsigned char bool_t;

typedef struct rtpframe_part_t {
	struct list_head entry;
	char buf[MAX_RECV_BUFFER_SIZE];
	int offset;
	int actual_len;
	int mb_in_slice;
	unsigned short seq;
	unsigned short mark : 1;
	unsigned short psc : 1;
}rtpframe_part_t;

typedef struct rtpframe_t {
	unsigned int used;
	unsigned int key;
	unsigned int ts;
	int id;
	int cur_max_mb;
	struct list_head part_list;
}rtpframe_t;

struct videortp_t
{
	videortp_config_t config;
	rtp_session_t *rtp_sess;

	LONG force_key_frames;

	DWORD last_peer_update_tick;

	/******************************接收端*/
	VideoDecoder *decoder;
	rtpframe_part_t *sps;
	rtpframe_part_t *pps;
	/*接收缓冲*/
	struct list_head free_part_list;
	rtpframe_t frame_win[FRAME_WIN_SIZE];
	unsigned int frame_win_start;
	int frame_win_ptr;
	unsigned int frame_duration;
	unsigned int prev_dec_ts;
	unsigned short prev_dec_seq;
	uint64_t prev_dec_ms;
	//抖动缓冲
	VideoJBufferApi* jbuffer;
	//拥塞控制
	int send_cc_feedback;
	
#ifdef _WIN32
	HANDLE recv_thread;
	HANDLE evt;
#else
	pthread_t recv_threadid;
	sem_t sem_evt;
#endif
	/******************************发送端 */
	VideoEncoderApi *encoder;
	x264_t* enc_params;
	//发送打包
	unsigned delta_ts;
	int64_t rtp_start_ms;
	RtpHeaderExtensionApi *rtp_header_extension;
	//拥塞控制
	int     remote_support_cc;
	int     recv_cc_feedback;
	int64_t recv_cc_feedback_ms;
	
	uint64_t framenum;

	//h264_packetizer
	h264_packetizer *h264_packetizer;

	//...
};

typedef struct _MSPicture {
	int w, h;
	uint8_t *planes[4];				// we usually use 3 planes, 4th is for compatibility
	int strides[4];					// with ffmpeg's swscale.h
}MSPicture;

//static void __Dbg(videortp_t *rtp, const char *fmt, ...)
//{
//	int n;
//	va_list arg;
//	va_start(arg, fmt);
//	if (rtp->config.dbg) {
//		(*rtp->config.dbg)(rtp->config.user_data, fmt, arg);
//	} else {
//		n = _vscprintf(fmt, arg);
//		if (n > 0) {
//			char *buf = (char*)_alloca((size_t)(n+3));
//			vsprintf(buf, fmt, arg);
//			strcat(buf, "\r\n");
//			OutputDebugStringA((LPCSTR)buf);
//			printf(buf);
//		}
//	}
//	va_end(arg);
//}



//#define Dbg(__fmt__, ...) __Dbg(vrtp, __fmt__, __VA_ARGS__)


static void get_start_config_bitrate(videortp_config_t *config, int *max_bitrate, int *target_bitrate, int *min_bitrate){
	*max_bitrate = config->bit_rate; //bps
	*min_bitrate = 50*1000 > config->bit_rate ? config->bit_rate : 50*1000; //bps
	*target_bitrate = *max_bitrate; //bps
	*target_bitrate = (*target_bitrate < *min_bitrate) ? *min_bitrate : *target_bitrate; //bps
}


static int get_mtu(int config_mtu){
	int mtu = config_mtu > MAX_PLAYLOAD_SIZE ? MAX_PLAYLOAD_SIZE : config_mtu;
	return mtu;
}

//interval 单位为ms
static unsigned convert_to_rtp_timestamp_increment(int64_t interval) { 
	// 时间戳增量 
	unsigned timestampIncrement = (VIDEO_CLOCK/1000*interval); 

	return timestampIncrement;
}


static void yuv_buffers_combine_to_one(const video_frame *vframe, unsigned char *buffer)
{ 
	int i =0, j =0, k =0;

	for(i = 0; i < vframe->height; i++)
	{
		memcpy((void *)(buffer+vframe->width*i),
		(const void *)(vframe->data[0]+vframe->linesize[0]*i),
		(size_t)(vframe->width));
		
	}
	for(j = 0; j < vframe->height/2; j++)
	{
		memcpy((void *)(buffer+vframe->width*i+vframe->width/2*j),
		(const void *)(vframe->data[1]+vframe->linesize[1]*j),
			(size_t)(vframe->width/2));
	}
	for(k =0; k < vframe->height/2; k++)
	{
		memcpy((void *)(buffer+vframe->width*i+vframe->width/2*j+vframe->width/2*k),
			(const void *)(vframe->data[2]+vframe->linesize[2]*k),
			(size_t)(vframe->width/2));
	}
}



static rtpframe_part_t *rtpframe_part_create(videortp_t *vrtp)
{
	rtpframe_part_t *part;
	if (!list_empty((const struct list_head *)(&vrtp->free_part_list))) {
		part = list_first_entry(&vrtp->free_part_list, rtpframe_part_t, entry);
		list_del((struct list_head *)(&part->entry));
	} else {
		part = MALLOC_T(rtpframe_part_t);
	}
	return part;
}

static void rtpframe_part_destroy(videortp_t *vrtp, rtpframe_part_t *part)
{
	list_add((struct list_head *)(&part->entry), (struct list_head *)(&vrtp->free_part_list));
}

rtpframe_part_t *rtpframe_part_dupb(rtpframe_part_t *mp){
	rtpframe_part_t *part = MALLOC_T(rtpframe_part_t);
	if (part){
		part->entry = mp->entry;
		memcpy((void *)(part->buf), (const void *)(mp->buf), strlen((const char *)(mp->buf)));
		part->offset = mp->offset;
		part->actual_len = mp->actual_len;
		part->mb_in_slice = mp->mb_in_slice;
		part->seq = mp->seq;
		part->mark = mp->mark;
		part->psc = mp->psc;
	}
	return part;
}

static void rtpframe_clear(videortp_t *vrtp, rtpframe_t *frame)
{
	if (frame->used) {
		list_splice_init((struct list_head *)(&frame->part_list), (struct list_head *)(&vrtp->free_part_list));
		frame->used = 0;
	}
}

static unsigned short rtpframe_get_last_seq(rtpframe_t *frame)
{
	if (!list_empty((const struct list_head *)(&frame->part_list))) {
		rtpframe_part_t *part = list_last_entry(&frame->part_list, rtpframe_part_t, entry);
		return part->seq;
	} else {
		assert(0);
		return 0;
	}
}

static unsigned short rtpframe_get_first_seq(rtpframe_t *frame)
{
	if (!list_empty((const struct list_head *)(&frame->part_list))) {
		rtpframe_part_t *part = list_first_entry(&frame->part_list, rtpframe_part_t, entry);
		return part->seq;
	} else {
		assert(0);
		return 0;
	}
}

static int rtpframe_is_empty(rtpframe_t *frame)
{
	if (list_empty((const struct list_head *)(&frame->part_list))) {
		return 1;
	} 
	return 0;
}



static __inline void receiver_notify_peer_fast_update(videortp_t *vrtp)
{
	DWORD dwNow = GetTickCount();
	if (dwNow - vrtp->last_peer_update_tick >= PEER_UPDATE_INTERVAL) {

		Dbg("%I64d receiver_notify_peer_fast_update!", TimeInMilliseconds());
		rtp_session_send_rtcp_h261_fir(vrtp->rtp_sess);
		vrtp->last_peer_update_tick = dwNow;
	}
}

static __inline void receiver_notify_peer_fast_update_now(videortp_t *vrtp)
{
	DWORD dwNow = GetTickCount();

	Dbg("%I64d receiver_notify_peer_fast_update_now!", TimeInMilliseconds());
	rtp_session_send_rtcp_h261_fir(vrtp->rtp_sess);
	vrtp->last_peer_update_tick = dwNow;
}

static __inline void receiver_force_key_frame(videortp_t *vrtp)
{
	Dbg("%I64d receiver_force_key_frame!", TimeInMilliseconds());
	InterlockedCompareExchange(&vrtp->force_key_frames, 1, 0);
}

static void receiver_clear_window(videortp_t *vrtp)
{
	int i;
	for (i = 0; i < FRAME_WIN_SIZE; ++i) {
		rtpframe_t *frame = &vrtp->frame_win[i];
		rtpframe_clear(vrtp, frame);
	}
	vrtp->frame_duration  = 0;
}

int receiver_msgdsize(const rtpframe_part_t *mp)
{
	int msgsize = 0;
	{
		msgsize += (int) mp->actual_len;
	}
	return msgsize;
}

int video_coding_on_log(void *userdata, int level, const char* file, int line, const char* fmt, va_list vl){

	videortp_t *vrtp = (videortp_t *)userdata;

	int n;
	n = _vscprintf(fmt, vl);
	if ((DEBUG_ENCODER || DEBUG_DECODER) && n > 0 && vrtp && level >= VIDEO_CODING_DEBUG_INFO) {
		char *buf = (char*)_alloca((size_t)(n+3));
		vsprintf(buf, fmt, vl);
		Dbg("%s.", buf);
	}
}

static int decoder_process(videortp_t *vrtp, uint8_t *input_buf, int input_len){
	int64_t before_decode_ms;
	int64_t after_decode_ms;
	int64_t before_render_ms;
	int64_t after_render_ms;

	//decode
	while (input_len > 0) {
		video_frame *decodered_frame;
		int key_frame = 0;
		video_debug_write_play_file(AUDIO_DEC_IN, input_buf, input_len);

		if(DEBUG_DECODER){
		Dbg("%s:%d: receiver_do_decode before decode data_len:%d.", __FILE__, __LINE__, input_len);
		}
		before_decode_ms = TimeInMilliseconds();
		
		decodered_frame = video_decoder_process(vrtp->decoder, input_buf, input_len, &input_len, &key_frame);

		if(DEBUG_DECODER){
		Dbg("%s:%d: receiver_do_decode after decode data_len:%d.", __FILE__, __LINE__, input_len);
		}
		after_decode_ms = TimeInMilliseconds();
		if (decodered_frame == NULL){
			Dbg("receiver_do_decode decode failed.");
			video_stats_receiver_on_decoded_frame(after_decode_ms, after_decode_ms - before_decode_ms, 0);
			return 0;
		}
		vrtp->prev_dec_ms = after_decode_ms;
		video_stats_receiver_on_decoded_frame(after_decode_ms, after_decode_ms - before_decode_ms, key_frame);

		//debug render file
		if (vrtp->config.rx_height)
		{ 
			if (VIDEO_FORMAT_RGB24 != decodered_frame->format)
			{	
				unsigned char *video_debug_buf;
				int length = vrtp->config.rx_height*vrtp->config.rx_width*3/2;
				video_debug_buf = (unsigned char *)malloc(length);
				yuv_buffers_combine_to_one(decodered_frame, video_debug_buf);
				video_debug_write_play_file(VIDEO_RENDER_IN, video_debug_buf, length);
				free(video_debug_buf);
			}
		}

		//notify render
		before_render_ms = TimeInMilliseconds();
		if(vrtp->config.on_rx_frame){
			vrtp->config.on_rx_frame(decodered_frame, vrtp->config.user_data);
		}else {
			//render is null, we need delete self.
			video_frame_delete(decodered_frame);
		}
		after_render_ms = TimeInMilliseconds();
		video_stats_receiver_on_rendered_frame(after_render_ms, after_render_ms - before_render_ms);

	}
	return input_len == 0;
}

void decoder_create(videortp_t *vrtp, const videortp_config_t *config){
	VideoCodingLogCallBack log_func;
	DecoderConfig decoder_config;
	decoder_config.color_space = VIDEO_FORMAT_RGB24;
	decoder_config.decode_id = CODEC_ID_H264;
	decoder_config.width = config->rx_width;
	decoder_config.height = config->rx_height;
	log_func.log_fn = &video_coding_on_log;
	log_func.userdata = vrtp;
	vrtp->decoder = video_decoder_open(&decoder_config, &log_func);

	Dbg("decoder_create color_space: %d decode_id: %d width: %d height: %d.", 
		decoder_config.color_space, decoder_config.decode_id, decoder_config.width, decoder_config.height);
}

void decoder_destroy(videortp_t *vrtp){
	if (vrtp->decoder != NULL) {
		video_decoder_close(vrtp->decoder);
	}
	Dbg("decoder_destroy.");
}


#if 0
#endif

/******************************standard_h264接收处理 start***************************/
static void receiver_standard_h264_update_sps(videortp_t *d, rtpframe_part_t *sps){
	if (d->sps){
		free((void *)(d->sps));
	}
	d->sps = rtpframe_part_dupb(sps);
}

static void receiver_standard_h264_update_pps(videortp_t *d, rtpframe_part_t *pps){
	if (d->pps){
		free((void *)(d->pps));
	}
	if (pps){
		d->pps=rtpframe_part_dupb(pps);
	}
	else{
		d->pps=NULL;
	}
}

static bool_t  receiver_standard_h264_check_sps_pps_change(videortp_t *d, rtpframe_part_t *sps, rtpframe_part_t *pps){
	bool_t ret1=FALSE,ret2=FALSE;
	if (d->sps){
		if (sps){
			ret1=(receiver_msgdsize(sps)!=receiver_msgdsize(d->sps)) || 
				(memcmp((const void *)(d->sps->buf),(const void *)(sps->buf),(size_t)receiver_msgdsize(sps))!=0);
			if (ret1) {
				receiver_standard_h264_update_sps(d,sps);
				receiver_standard_h264_update_pps(d,NULL);
			}
		}
	}else if (sps) {
		receiver_standard_h264_update_sps(d,sps);
	}
	if (d->pps){
		if (pps){
			ret2=(receiver_msgdsize(pps)!=receiver_msgdsize(d->pps)) || 
				(memcmp((const void *)(d->pps->buf), (const void *)(pps->buf), (size_t)receiver_msgdsize(pps))!=0);
			if (ret2) {
				receiver_standard_h264_update_pps(d,pps);
			}
		}
	}else if (pps) {
		receiver_standard_h264_update_pps(d,pps);
	}
	return ret1 || ret2;
}



static int receiver_standard_h264_add_startcode(videortp_t *vrtp, rtpframe_t *frame, 
	uint8_t *output_buf, bool_t *new_sps_pps)
{
	rtpframe_part_t *pos = NULL;
	uint8_t *dst = NULL;
	bool_t start_picture=TRUE;
	int output_len = 0;

	dst = output_buf;

	list_for_each_entry(pos, &frame->part_list, rtpframe_part_t, entry) 
	{
		x264_hdr *hdr = (x264_hdr*)&pos->buf[pos->offset];
		unsigned char* src = (unsigned char*)&pos->buf[pos->offset];
		uint8_t nalu_type = hdr->id;

		if (nalu_type==NAL_SPS){
			*new_sps_pps=receiver_standard_h264_check_sps_pps_change(vrtp,pos,NULL) || *new_sps_pps;
		}
		if (nalu_type==NAL_PPS){
			*new_sps_pps=receiver_standard_h264_check_sps_pps_change(vrtp,NULL,pos) || *new_sps_pps;
		}
		if (start_picture || nalu_type==NAL_SPS || nalu_type==NAL_PPS ){
			*dst++=0;
			start_picture=FALSE;
		}
		*dst++ = 0;
		*dst++ = 0;
		*dst++ = 1;
		*dst++=*src++;
		while(src < (unsigned char*)&(pos->buf[pos->offset]) + pos->actual_len - 3){
			if (src[0]==0 && src[1]==0 && src[2]<3){
				*dst++=0;
				*dst++=0;
				*dst++=3;
				src+=2;
			}
			*dst++=*src++;
		}
		*dst++=*src++;
		*dst++=*src++;
		*dst++=*src++;
	}

	output_len = dst - output_buf;
	return output_len;
}


static int receiver_standard_h264_add_encoded_buffer_startcode(videortp_t *vrtp, EncodedImage *encoded_image, 
	uint8_t *output_buf)
{
	uint8_t *dst = NULL;
	bool_t start_picture=TRUE;
	int output_len = 0;
	int i = 0;

	dst = output_buf;

	for (i = 0; i < encoded_image->fragmentation_header_.fragmentationVectorSize; i++)
	{
		x264_hdr *hdr = (x264_hdr*)&encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]];
		unsigned char* src = (unsigned char*)&encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]];
		uint8_t nalu_type = hdr->id;

		if (start_picture || nalu_type==NAL_SPS || nalu_type==NAL_PPS){
			*dst++=0;
			start_picture=FALSE;
		}
		*dst++ = 0;
		*dst++ = 0;
		*dst++ = 1;
		*dst++=*src++;
		while(src < (unsigned char*)&encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]] + 
				encoded_image->fragmentation_header_.fragmentationLength[i] - 3){
			if (src[0]==0 && src[1]==0 && src[2]<3){
				*dst++=0;
				*dst++=0;
				*dst++=3;
				src+=2;
			}
			*dst++=*src++;
		}
		*dst++=*src++;
		*dst++=*src++;
		*dst++=*src++;
	}

	output_len = dst - output_buf;
	return output_len;
}


static int receiver_standard_h264_calculate_mb_in_slice(char* psrc, size_t ulen)
{
	int ret = -1;
	bs_t bs_data;
	if (NULL == psrc || 0 == ulen){
		return ret;
	}

	bs_init(&bs_data, psrc, ulen);
	ret = bs_read_ue(&bs_data);

	return ret;
}

static int receiver_standard_h264_append_rtpframe_part(videortp_t *rtp, rtpframe_t *frame, 
	unsigned ts, unsigned key, rtpframe_part_t *new_part)
{
	if (frame->used && frame->ts != ts) 
	{
		rtpframe_clear(rtp, frame);
	}

	if (frame->used == 0){
		frame->ts = ts;
		frame->key = key;
		frame->cur_max_mb = 0;
	}

	if (frame->cur_max_mb <= new_part->mb_in_slice)
	{
		frame->cur_max_mb = new_part->mb_in_slice;
		list_add_tail(&new_part->entry, &frame->part_list);
		frame->used++;
	}
	else
	{
		rtpframe_part_t *pos;
		unsigned short temp_seq;
		list_for_each_entry(pos, &frame->part_list, rtpframe_part_t, entry)
		{
			if (pos->mb_in_slice > new_part->mb_in_slice)
			{
				break;
			}
		}
		temp_seq = new_part->seq;
		new_part->seq = pos->seq;
		pos->seq = temp_seq;
		__list_add(&new_part->entry, pos->entry.prev, &pos->entry);
		frame->used++;
	}

	return 1;
}

//ts不同, 一帧结束，返回此帧
static int receiver_standard_h264_find_frame(videortp_t *rtp, rtpframe_part_t* part_data, 
	unsigned mark, unsigned ts, unsigned key)
{
	int i = rtp->frame_win_start;
	if (rtp->frame_win[i].ts == ts)
	{
		receiver_standard_h264_append_rtpframe_part(rtp, &rtp->frame_win[i], ts, key, part_data);
		return -1;
	}
	else{
		int index = (rtp->frame_win_start + 1)%FRAME_WIN_SIZE;
		rtpframe_t *frame = &rtp->frame_win[i];
		receiver_standard_h264_append_rtpframe_part(rtp, &rtp->frame_win[index], ts, key, part_data);
		rtp->frame_win_start = index;

		return i;
	}
}

static int receiver_standard_h264_on_jbuffer_request_key_frame(void *userdata){
	
	videortp_t *vrtp = (videortp_t *)userdata;
	if (vrtp) {
		receiver_notify_peer_fast_update_now((vrtp));		
	}
}


static int receiver_h264_on_receive_encoded_image(EncodedImage *encoded_image, 
	unsigned int timestamp, unsigned short first_seq, unsigned short last_seq, void *userdata){
	
	videortp_t *vrtp = (videortp_t *)userdata;
	if (vrtp) {
		uint8_t *input_buf = NULL;
		int input_len = 0;
		int i = 0;
		int decoded;

	    if(DEBUG_RX){
		Dbg("%s:%d: receiver_h264_on_receive_encoded_image timestamp:%u first_seq:%u last_seq:%u key: %d len: %d.", __FILE__, __LINE__, 
			timestamp, first_seq, last_seq, encoded_image->key_frame, encoded_image->size_);
		Dbg("%s:%d: receiver_h264_on_receive_encoded_image fragmentationSize: %d.", __FILE__, __LINE__, 
				encoded_image->fragmentation_header_.fragmentationVectorSize);
		for (i = 0;i < encoded_image->fragmentation_header_.fragmentationVectorSize;++i){
		Dbg("%s:%d: receiver_h264_on_receive_encoded_image index: %d fragmentationLength: %d fragmentationOffset: %d.", __FILE__, __LINE__, 
				i, encoded_image->fragmentation_header_.fragmentationLength[i], encoded_image->fragmentation_header_.fragmentationOffset[i]);

		}
	    }

		if (encoded_image->key_frame || vrtp->prev_dec_seq+1 == first_seq) {
			input_len = encoded_image->size_ + MAX_ASSEMBLE_EXTRA_SIZE;
			input_buf = (uint8_t*)_alloca(input_len);
			memset(input_buf, 0, input_len);
			
			//00->003,同时加上startcode
			if (encoded_image->pt_ == REC_COMMON_VIDEO_PT){
				memcpy(input_buf, encoded_image->encoded_data_, encoded_image->size_);
				input_len = encoded_image->size_;
			} else {
				if (vrtp->h264_packetizer){
					int status;
					unsigned int whole_len = 0;
					for (i=0; i<encoded_image->fragmentation_header_.fragmentationVectorSize; ++i) {
						if (whole_len + encoded_image->fragmentation_header_.fragmentationLength[i] > input_len) {
							return 0;
						}
						status = h264_unpacketize( vrtp->h264_packetizer,
										   &encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]],
										   encoded_image->fragmentation_header_.fragmentationLength[i],
										   input_buf,
										   input_len,
										   &whole_len);
						if (status != 0) {
							continue;
						}
					}
					input_len = whole_len;
				}else {
					input_len = receiver_standard_h264_add_encoded_buffer_startcode(vrtp, encoded_image, input_buf);
				}
			}
			if(DEBUG_RX){
			Dbg("%s:%d: receiver_h264_on_receive_encoded_image encoded_size:%d frame_len:%d now:%I64d.", __FILE__, __LINE__, 
				encoded_image->size_, input_len, TimeInMilliseconds());
			}
			
			//decode
			decoded = decoder_process(vrtp, input_buf, input_len);
			if (decoded) {
				vrtp->prev_dec_seq = last_seq;
				vrtp->prev_dec_ts = timestamp;
			} else {
				Dbg("receiver_h264_on_receive_encoded_image decode_frame failed!");
			}
		} 
	}

	return 0;
}


static int receiver_standard_h264_decode(videortp_t *vrtp, rtpframe_t *frame)
{
	if (frame->used) {
		rtpframe_part_t *pos = NULL;
		int got_picture = 0;
		uint8_t *input_buf = NULL;
		int input_len = 0;

		input_buf = (uint8_t*)_alloca(frame->used * MAX_RECV_BUFFER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
		memset(input_buf, 0, frame->used * MAX_RECV_BUFFER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);

		//00->003,同时加上startcode
		{
		bool_t need_reinit=FALSE;
		input_len = receiver_standard_h264_add_startcode(vrtp, frame, input_buf, &need_reinit);
		}
		if(DEBUG_RX){
		Dbg("%s:%d: receiver_standard_h264_decode frame_used:%d frame_len:%d now:%I64d.", __FILE__, __LINE__, frame->used, input_len, TimeInMilliseconds());
		}
		
		//decode
		return decoder_process(vrtp, input_buf, input_len);
	}
	return 0;
}

rtpframe_t *receiver_standard_h264_assemble(videortp_t *vrtp, 
	rtpframe_part_t *part_data, int len, 
	unsigned short seq, unsigned mark, unsigned ts){

	int ret = -1;
	int iret = -1;
	rtpframe_t *frame = NULL;
	int key = 0;

	x264_hdr *hdr = (x264_hdr*)&part_data->buf[0];
	uint8_t nalu_type = hdr->id;
	if(NAL_SPS == nalu_type || NAL_PPS == nalu_type){
		part_data->mb_in_slice = 0;
		key = 1;
	}else{
		part_data->mb_in_slice = receiver_standard_h264_calculate_mb_in_slice(&part_data->buf[1], part_data->actual_len - 1);
	}
	if (NAL_SLICE_IDR == nalu_type){
		key = 1;
	}

	part_data->actual_len = len;
	part_data->offset = 0;
	part_data->mark = mark;
	part_data->seq = seq;
	if(DEBUG_RX){
	Dbg("%s:%d: receiver_standard_h264_assemble actual_len:%d seq:%d key:%d.", __FILE__, __LINE__, len, seq, key);
	}
	
	iret = receiver_standard_h264_find_frame(vrtp, part_data, mark, ts, key);
	if (iret != -1) {
		return &vrtp->frame_win[iret];
	}

	return NULL;
}


static int receiver_process_standard_h264_packet(
	videortp_t *vrtp, rtpframe_part_t *part_data, int len, 
	unsigned short seq, unsigned mark, unsigned ts, unsigned pt)
{
#if 1
	VideoJBufferPacketInfo packet_info = {0};
	x264_hdr *hdr = (x264_hdr*)&part_data->buf[part_data->offset];
	uint8_t nalu_type = NAL_UNKNOWN;
	int actual_len = part_data->actual_len;
	int offset = part_data->offset;

	packet_info.length = actual_len;
	packet_info.packet_type = NORMAL_PACKET_IN_FRAME;
	if(mark){
		packet_info.packet_type = LAST_PACKET_IN_FRAME;
	}
	packet_info.seq = seq;
	packet_info.timestamp = ts;
	nalu_type = hdr->id;
	if (vrtp->h264_packetizer) {
		h264_unpacketize_get_original_nal_type(vrtp->h264_packetizer, &part_data->buf[offset], actual_len, &nalu_type);
	}
	if(NAL_SPS == nalu_type || NAL_PPS == nalu_type || NAL_SLICE_IDR == nalu_type){
		packet_info.is_key = 1;
	}
	packet_info.pt = pt;

	if(DEBUG_RX){
	Dbg("%s:%d: receiver_process_standard_h264_packet len:%d seq:%d mark:%d ts:%d nalu_type:%u offset:%d actual_len:%d.", __FILE__, __LINE__, 
		len, seq, mark, ts, nalu_type, offset, actual_len);
	}
	
	video_jbuffer_api_receive_packet(vrtp->jbuffer, &part_data->buf[offset], &packet_info);
	rtpframe_part_destroy(vrtp, part_data);
	
#else 
	rtpframe_t *frame = NULL;
	frame = receiver_standard_h264_assemble(vrtp, part_data, len, seq, mark, ts);
	if (frame != NULL) {
		int decoded = 0;

		//取出的frame可能为空(在第一次收数据时),需要先判空
		if (!rtpframe_is_empty(frame) 
			&& (frame->key || vrtp->prev_dec_seq+1 == rtpframe_get_first_seq(frame))){
			
			decoded = receiver_standard_h264_decode(vrtp, frame);
			if (decoded) {
				//Dbg("decode_frame ok!");
				if (vrtp->frame_duration==0 && vrtp->prev_dec_seq+1 == rtpframe_get_first_seq(frame)) {
					vrtp->frame_duration = frame->ts - vrtp->prev_dec_ts;
					Dbg("decode frame duration: %d", vrtp->frame_duration);
				}
				vrtp->prev_dec_seq = rtpframe_get_last_seq(frame);
				vrtp->prev_dec_ts = frame->ts;
			} else {
				Dbg("decode_frame failed!");
			}
		} 
		
		rtpframe_clear(vrtp, frame);
	}
#endif
	
	return 0;
}
/******************************standard_h264接收处理 end***************************/

#if 0
#endif

/******************************custom_h264接收处理 start***************************/


static int receiver_custom_h264_check_rtpframe_integrated(rtpframe_t *frame)
{
	if (!list_empty((const struct list_head *)(&frame->part_list))) {
		rtpframe_part_t *first = list_first_entry(&frame->part_list, rtpframe_part_t, entry);
		rtpframe_part_t *last = list_last_entry(&frame->part_list, rtpframe_part_t, entry);
		if (first->psc && last->mark) {
			rtpframe_part_t *pos;
			unsigned short seq = first->seq;
			list_for_each_entry(pos, &frame->part_list, rtpframe_part_t, entry) {
				if (seq == pos->seq) {
					++seq;
				} else {
					return 0;
				}
			}
			return 1;
		}
	}
	return 0;
}

static int receiver_custom_h264_check_rtpframe_partleft(rtpframe_t *frame)
{
	if (!list_empty((const struct list_head *)(&frame->part_list))) {
		rtpframe_part_t *first = list_first_entry(&frame->part_list, rtpframe_part_t, entry);
		rtpframe_part_t *last = list_last_entry(&frame->part_list, rtpframe_part_t, entry);
		if (last->mark && (0 != first->psc)) {
			return 1;
		}
	}

	return 0;
}

//根据ts查找缓存rtpframe_t位置
static rtpframe_t *receiver_custom_h264_find_rtpframe(videortp_t *rtp, unsigned ts)
{
	if (rtp->frame_duration == 0) {
		return &rtp->frame_win[rtp->frame_win_ptr];		
	} else {
		unsigned int frame_win_duration = rtp->frame_duration*FRAME_WIN_SIZE;
		if (RTP_SEQ_GT(ts, rtp->prev_dec_ts, frame_win_duration)) {
			unsigned int idx = (ts - rtp->prev_dec_ts) / rtp->frame_duration;
			idx = (rtp->frame_win_ptr + idx + FRAME_WIN_SIZE - 1) % FRAME_WIN_SIZE;
			return &rtp->frame_win[idx];
		}
	}
	return NULL;
}


static int receiver_custom_h264_append_rtpframe_part(videortp_t *rtp, rtpframe_t *frame, unsigned key, unsigned ts, rtpframe_part_t *new_part)
{
	if (frame->used && frame->ts != ts) {
		rtpframe_clear(rtp, frame);
	}
	if (frame->used == 0) {
		frame->ts = ts;
		frame->key = key;
	} else {
		rtpframe_part_t *pos;
		if (frame->used >= 1 && !key) {
			OutputDebugStringA("a");
		}
		list_for_each_entry(pos, &frame->part_list, rtpframe_part_t, entry) {
			if (pos->seq == new_part->seq) {
				return 0;
			} else if (RTP_SEQ_GT(pos->seq, new_part->seq, RTP_MAX_JUMP)) {
				__list_add(&new_part->entry, pos->entry.prev, &pos->entry);
				frame->used++;
				return 1;
			} else if (RTP_SEQ_GT(new_part->seq, pos->seq, RTP_MAX_JUMP)) {
				continue;
			} else {
				return 0;
			}
		}
	}
	list_add_tail(&new_part->entry, &frame->part_list);
	frame->used++;
	return 1;
}



static int receiver_custom_h264_decode(videortp_t *vrtp, rtpframe_t *frame)
{
	if (frame->used) {
		rtpframe_part_t *pos = NULL;
		int got_picture = 0;
		uint8_t *input_buf = NULL;
		int input_len = 0;

		input_buf = (uint8_t*)_alloca(frame->used * MAX_RECV_BUFFER_SIZE+FF_INPUT_BUFFER_PADDING_SIZE);
		list_for_each_entry(pos, &frame->part_list, rtpframe_part_t, entry) {
			memcpy(input_buf+input_len, &pos->buf[pos->offset], pos->actual_len);
			input_len += pos->actual_len;
		}
		memset(input_buf+input_len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
		if(DEBUG_RX){
		Dbg("%s:%d: receiver_custom_h264_decode frame_used:%d frame_len:%d now:%I64d.", __FILE__, __LINE__, frame->used, input_len, TimeInMilliseconds());
		}
		//decode
		return decoder_process(vrtp, input_buf, input_len);
	}
	return 0;
}


rtpframe_t *receiver_custom_h264_assemble(videortp_t *vrtp, 
	rtpframe_part_t *part_data, int len, 
	unsigned short seq, unsigned mark, unsigned ts){

	h26x_hdr *hdr = (h26x_hdr*)&part_data->buf[0];
	char *raw_data = (char*)(hdr + 1);
	rtpframe_t *frame = NULL;
	int actual_len = len - sizeof(h26x_hdr) + 2;
	int appended;
	int key = hdr->key;
	int sno = hdr->id;
	int end = hdr->end;
	if(DEBUG_RX){
	Dbg("%s:%d: receiver_custom_h264_assemble actual_len:%d seq:%d key:%d sno:%d end: %d.", __FILE__, __LINE__, actual_len, seq, !!key, sno, end);
	}
	part_data->actual_len = actual_len;
	part_data->offset = sizeof(h26x_hdr)-2;
	part_data->mark = mark;
	part_data->seq = seq;
	part_data->psc = (sno == 0);
	frame = receiver_custom_h264_find_rtpframe(vrtp, ts);
	if (!frame) {
		receiver_clear_window(vrtp);
		frame = &vrtp->frame_win[vrtp->frame_win_ptr];
	}
	appended = receiver_custom_h264_append_rtpframe_part(vrtp, frame, key, ts, part_data);
	if (!appended) {
		rtpframe_part_destroy(vrtp, part_data);
	} else if(receiver_custom_h264_check_rtpframe_integrated(frame)) {
		return frame;
	}
	return NULL;
}


static int receiver_process_custom_h264_packet(videortp_t *vrtp, 
	rtpframe_part_t *part_data, int len, 
	unsigned short seq, unsigned mark, unsigned ts, unsigned pt)
{
#if 1
	VideoJBufferPacketInfo packet_info = {0};

	h26x_hdr *hdr = (h26x_hdr*)&part_data->buf[part_data->offset];
	int actual_len = part_data->actual_len - sizeof(h26x_hdr) + 2;
	int key = hdr->key;
	int sno = hdr->id;
	int end = hdr->end;
	int offset = part_data->offset + sizeof(h26x_hdr)-2;

	packet_info.length = actual_len;
	packet_info.packet_type = NORMAL_PACKET_IN_FRAME;
	if (sno == 0){
		packet_info.packet_type = FIRST_PACKET_IN_FRAME;
	}
	if(end){
		packet_info.packet_type = LAST_PACKET_IN_FRAME;
	}
	packet_info.seq = seq;
	packet_info.timestamp = ts;
	packet_info.is_key = key;
	packet_info.pt = pt;

	if(DEBUG_RX){
	Dbg("%s:%d: receiver_process_custom_h264_packet len:%d seq:%d mark:%d ts:%d pt:%u key:%d sno:%d end:%d offset:%d actual_len:%d.", __FILE__, __LINE__, 
		len, seq, mark, ts, pt, key, sno, end, offset, actual_len);
	}
	
	video_jbuffer_api_receive_packet(vrtp->jbuffer, &part_data->buf[offset], &packet_info);
	rtpframe_part_destroy(vrtp, part_data);

#else 
	rtpframe_t *frame = NULL;

	if(DEBUG_RX){
	Dbg("%s:%d: receiver_process_custom_h264_packet len:%d seq:%d mark:%d ts:%d.", __FILE__, __LINE__, len, seq, mark, ts);
	}
	
	frame = receiver_custom_h264_assemble(vrtp, part_data, len, seq, mark, ts);
	if (frame != NULL) {
		int decoded;
		do {
			decoded = 0;
			if (frame->key || vrtp->prev_dec_seq+1 == rtpframe_get_first_seq(frame)) {
				decoded = receiver_custom_h264_decode(vrtp, frame);
				if (decoded) {
					if (vrtp->frame_duration==0 && vrtp->prev_dec_seq+1 == rtpframe_get_first_seq(frame)) {
						vrtp->frame_duration = frame->ts - vrtp->prev_dec_ts;
						Dbg("%s:%d: receiver_process_custom_h264_packet decode frame duration: %d.", __FILE__, __LINE__, vrtp->frame_duration);
					}
					vrtp->prev_dec_seq = rtpframe_get_last_seq(frame);
					vrtp->prev_dec_ts = frame->ts;
				} else {
					Dbg("%s:%d: receiver_process_custom_h264_packet decode_frame failed!", __FILE__, __LINE__);
				}
				rtpframe_clear(vrtp, frame);
				vrtp->frame_win_ptr = (frame->id+1) % FRAME_WIN_SIZE;
				frame = &vrtp->frame_win[vrtp->frame_win_ptr];
			} else {
				if (!frame->key) {
					receiver_notify_peer_fast_update(vrtp);
				}
			}
		} while (decoded && frame->used && receiver_custom_h264_check_rtpframe_integrated(frame));
	}
#endif
	
	return 0;
}
/******************************custom_h264接收处理 end***************************/

#if 0
#endif

static void receiver_process_rtcp_packet(videortp_t *vrtp, unsigned rtcp_flags){
	if (rtcp_flags & RTP_SESSION_HAS_FIR){
		receiver_force_key_frame(vrtp);
	}
	if (rtcp_flags & RTP_SESSION_HAS_RTPFB_TMMBR) {
		rtcp_statistics rtcp_stats = {0};
		rtp_session_get_rtcp_stat(vrtp->rtp_sess, &rtcp_stats);

		sim_recv_bitrate_feedback(rtcp_stats.tmmbr_max_bitrate);
		vrtp->recv_cc_feedback_ms = TimeInMilliseconds();
		vrtp->recv_cc_feedback = TRUE;
		vrtp->remote_support_cc = TRUE;
	} 
	if ((rtcp_flags & RTP_SESSION_HAS_RR) || (rtcp_flags & RTP_SESSION_HAS_SR)) {
		rtcp_statistics rtcp_stats = {0};
		rtp_session_get_rtcp_stat(vrtp->rtp_sess, &rtcp_stats);

		sim_update_rtt((uint32_t)(rtcp_stats.rtt*1000));
		sim_recv_fraction_loss_feedback(rtcp_stats.fraction_lost, rtcp_stats.report_block_last_number_of_packets);
	}
}

static unsigned int __stdcall recv_proc(void *arg)
{
	videortp_t *vrtp = (videortp_t*)arg;
	int rtp_timeout_cnt = 0;
	int64_t pre_500_ms = TimeInMilliseconds();

	Dbg("recv_proc.");

	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
	receiver_notify_peer_fast_update_now(vrtp);


	for (;;) {
#ifdef _WIN32
		DWORD dwRet = WaitForSingleObject(vrtp->evt, 10);
		if (dwRet == WAIT_TIMEOUT)
#else
		struct timespec ts;
		clock_gettime(CLOCK_REALTIME, &ts);
		ts.tv_nsec += 1000 * 1000 * 10;
		//sem_getvalue(&m_semt, &ivalue);
		if (-1 == sem_timedwait(&vrtp->sem_evt, &ts) && (ETIMEDOUT == errno))
#endif
		{
			int n;
			{
				unsigned rtcp_flags = 0;
				int result = rtp_session_recv_rtcp(vrtp->rtp_sess, &rtcp_flags);
				if (result >= 0) {
					receiver_process_rtcp_packet(vrtp, rtcp_flags);
				}
			}
			do {
				unsigned short seq = 0;
				unsigned mark = 0;
				unsigned extension = 0;
				unsigned ts = 0;
				unsigned pt = 0;
				rtp_hdr hdr = {0};
				rtpframe_part_t *part_data = rtpframe_part_create(vrtp);
				rtp_session_t *rtp_sess = vrtp->rtp_sess;
				part_data->actual_len = 0;
				part_data->mark = 0;
				part_data->psc = 0;
				part_data->seq = 0;
				part_data->offset = 0;
				part_data->mb_in_slice = -1;

				n = rtp_session_recv_hook2(rtp_sess, &hdr, part_data->buf, sizeof(part_data->buf), vrtp->config.on_rx_udp, vrtp->config.user_data);
				seq = ntohs(hdr.seq);
				mark = hdr.m;
				extension = hdr.x;
				ts = ntohl(hdr.ts);
				pt = hdr.pt;
#if 0 // for testing
#define PACKET_LOSS_RATIO	30 
				if (n > 0 && rand()%1000 >= PACKET_LOSS_RATIO) {
					Dbg("rtp_session_recv_hook pt = %u, mark = %u, ts = %u, seq = %u, size = %d", pt, mark, ts, seq, n);
#else
				if (n > 0) {
#endif				
					{
					uint32_t send_time = 0;
					if (vrtp->rtp_header_extension && extension){
						int extension_length = 0;
						rtp_header_extension_api_decode_absolute_send_time(vrtp->rtp_header_extension, 
							(uint8_t *)part_data->buf, n, &send_time, &extension_length);
						part_data->actual_len = n - extension_length;
						part_data->offset = extension_length;
						if(DEBUG_RX){
							Dbg("%s:%d: recv_proc rtp_header_extension send_time:%u length:%d actual_len:%d offset:%d.", 
								__FILE__, __LINE__, send_time, extension_length, 
								part_data->actual_len, part_data->offset);
						}
					}else {
						part_data->actual_len = n;
						part_data->offset = 0;
					}

					//huchen add for video cc
					{
						sim_segment_t seg = {0};
						seg.transport_seq = seq;
						//注意，cc中的ts是以真实时间毫秒为单位，rtp的时间戳是90000为1秒，这里需要转换
						seg.timestamp = (send_time==0 ? (ts/(VIDEO_CLOCK/1000)) : send_time);
						seg.data_size = n;
						sim_recv_video(&seg);
					}
					}
					video_stats_bandwidth_update_recv_rtp_bytes(n);
					video_stats_receiver_on_incoming_packet(TimeInMilliseconds());

					if (REC_COMMON_VIDEO_PT == pt){
						receiver_process_custom_h264_packet(vrtp, part_data, n, seq, mark, ts, pt);
					}else{
						receiver_process_standard_h264_packet(vrtp, part_data, n, seq, mark, ts, pt);
					}
					rtp_timeout_cnt = 0;
				} else {
					rtpframe_part_destroy(vrtp, part_data);
				}

			} while (n > 0);

			{
			    //1s没有解码到视频数据，请求I帧
				int64_t now_ms = TimeInMilliseconds();
				if (now_ms - vrtp->prev_dec_ms >= 1000){
					Dbg("recv_proc now:%I64d > prev_dec_ms:%I64d 1s.", TimeInMilliseconds(), vrtp->prev_dec_ms);
					receiver_notify_peer_fast_update_now(vrtp);
					vrtp->prev_dec_ms = now_ms;
				}
				if (now_ms - pre_500_ms >= 500){
					//发送流控信令,表明接收端支持拥塞控制，让发送端发送加上send time(rtp header extension)
					if (vrtp->send_cc_feedback == FALSE){
						int max_bitrate, target_bitrate, min_bitrate;
						get_start_config_bitrate(&vrtp->config, &max_bitrate, &target_bitrate, &min_bitrate);
						rtp_session_send_rtcp_fb_tmmbr(vrtp->rtp_sess, target_bitrate);
					}
					pre_500_ms = now_ms;
				}
			}
		} else {
			break;
		}
	}

	return 0;
}

#if 0
#endif

/******************************custom_h264发送处理 start***************************/


static void sender_custom_h264_packetize_and_send(videortp_t *vrtp, int key, unsigned pt, const uint8_t *buf, int n)
{
	const char *ptr = (const char*)buf;
	int left = n;
	unsigned delta_ts = vrtp->delta_ts;
	int id = 0;
	int mtu = get_mtu(vrtp->config.mtu);
	mtu = mtu-20-8-12-sizeof(h26x_hdr)+2; // ip hdr: 20, udp hdr: 8, rtp hdr: 12

	if(DEBUG_TX){
	Dbg("%s:%d: sender_custom_h264_packetize_and_send key: %d len: %d delta_ts: %d now: %I64d.", 
		__FILE__, __LINE__, key, n, delta_ts, TimeInMilliseconds());
	}
	video_debug_write_record_file(VIDEO_ENC_OUT, buf, n);
	
	while (left > 0) {
		int rc;
		char tx_buf[MAX_PLAYLOAD_SIZE];
		h26x_hdr *hdr = (h26x_hdr*)&tx_buf[0];
		unsigned rtcp_flag;
		int tn = min(left, mtu);
		unsigned mark = (tn == left);
		hdr->key = !!key;
		hdr->end = mark;
		hdr->id = id++;
		memcpy((void *)(&tx_buf[0]+sizeof(h26x_hdr)-2), (const void *)ptr, (size_t)tn);
		if (DEBUG_TX) {
			Dbg("end = %d, id = %d, tn = %d", hdr->end, hdr->id, tn);
		}
		rc = rtp_session_send_hook(vrtp->rtp_sess, &rtcp_flag, pt, mark, delta_ts, tx_buf, tn+sizeof(h26x_hdr)-2, vrtp->config.on_tx_udp, vrtp->config.user_data);
		if (rc == 0) {
			receiver_process_rtcp_packet(vrtp, rtcp_flag);
			delta_ts = 0;
			left -= tn;
			ptr += tn;
		} else {
			break;
		}
	}
}


static void sender_custom_h264_send_fragment(videortp_t *vrtp, int index, int key_frame, unsigned mark, unsigned pt, uint8_t *fragment, int length)
{

	char tx_buf[MAX_PLAYLOAD_SIZE] = {0};

	video_debug_write_record_file(VIDEO_ENC_OUT, fragment, length);
	video_stats_bandwidth_update_send_rtp_bytes(length);
	video_stats_sender_on_sent_packet(TimeInMilliseconds());

	if (MAX_PLAYLOAD_SIZE > length + sizeof(h26x_hdr)-2 + 32/*rtp_header_extension_length*/){
		int rc;
		unsigned rtcp_flag;
		h26x_hdr *hdr;
		int rtp_extension = 0;
		char rtp_header_extension_buf[32] = {0};
		int rtp_header_extension_length = 0;
		unsigned int delta_ts = vrtp->delta_ts;

		if(DEBUG_TX){
		Dbg("%s:%d: sender_custom_h264_send_fragment mark: %d length: %d delta_ts: %d now: %I64d.", 
			__FILE__, __LINE__, mark, length, delta_ts, TimeInMilliseconds());
		}

		//rtp_header_extension 
		if (vrtp->rtp_header_extension && vrtp->remote_support_cc){
			uint32_t interval_ms = TimeInMilliseconds() - vrtp->rtp_start_ms;
			rtp_header_extension_api_encode_absolute_send_time(vrtp->rtp_header_extension, 
				interval_ms, (uint8_t *)rtp_header_extension_buf, &rtp_header_extension_length);
			memcpy((void *)(&tx_buf[0]), (const void *)rtp_header_extension_buf, (size_t)rtp_header_extension_length);
			rtp_extension = 1;
			if(DEBUG_TX){
				Dbg("%s:%d: sender_custom_h264_send_fragment rtp_header_extension interval_ms:%u length:%d.", __FILE__, __LINE__, interval_ms, rtp_header_extension_length);
			}
		}
		//custom header
		hdr = (h26x_hdr*)&tx_buf[rtp_header_extension_length];
		hdr->key = !!key_frame;
		hdr->end = mark;
		hdr->id = index;
		//playload
		memcpy((void *)(&tx_buf[rtp_header_extension_length]+sizeof(h26x_hdr)-2), (const void *)fragment, (size_t)length);
		{	rtp_hdr rtp_hdr;
			rtp_state *rtp_state;
			rtp_state = rtp_session_get_rtp_state(vrtp->rtp_sess);
			rtp_state_fill_rtp(rtp_state, &rtp_hdr, pt, mark, delta_ts);
			rtp_hdr.x = rtp_extension;
			rc = rtp_session_send_hook2(vrtp->rtp_sess, &rtcp_flag, &rtp_hdr,
				tx_buf, length+sizeof(h26x_hdr)-2+rtp_header_extension_length, 
				vrtp->config.on_tx_udp, vrtp->config.user_data);
			if (rc == 0) {
				receiver_process_rtcp_packet(vrtp, rtcp_flag);
			} 
		}
	}
}



/******************************custom_h264发送处理 end***************************/


/******************************standard_h264发送处理 start***************************/

static int sender_standard_h264_send_packet(videortp_t *vrtp, unsigned mark, unsigned pt, const uint8_t *packet, int length)
{
	char tx_buf[MAX_PLAYLOAD_SIZE] = {0};

	if (MAX_PLAYLOAD_SIZE > length + 32/*rtp_header_extension_length*/){
		int rc;
		unsigned rtcp_flag; 
		int rtp_extension = 0;
		char rtp_header_extension_buf[32] = {0};
		int rtp_header_extension_length = 0;
		unsigned int delta_ts = vrtp->delta_ts;
		
		if(DEBUG_TX){
		Dbg("%s:%d: sender_standard_h264_send_packet mark: %d length: %d delta_ts: %d now: %I64d.", 
			__FILE__, __LINE__, mark, length, delta_ts, TimeInMilliseconds());
		}
		
		//rtp_header_extension 
		if (vrtp->rtp_header_extension && vrtp->remote_support_cc){
			uint32_t interval_ms = TimeInMilliseconds() - vrtp->rtp_start_ms;
			rtp_header_extension_api_encode_absolute_send_time(vrtp->rtp_header_extension, 
				interval_ms, (uint8_t *)rtp_header_extension_buf, &rtp_header_extension_length);
			memcpy(&tx_buf[0], rtp_header_extension_buf, rtp_header_extension_length);
			rtp_extension = 1;
			if(DEBUG_TX){
				Dbg("%s:%d: sender_standard_h264_send_packet rtp_header_extension interval_ms:%u length:%d.", __FILE__, __LINE__, interval_ms, rtp_header_extension_length);
			}
		}
		//playload
		memcpy(&tx_buf[rtp_header_extension_length], packet, length);
		{	
			rtp_hdr rtp_hdr;
			rtp_state *rtp_state;
			rtp_state = rtp_session_get_rtp_state(vrtp->rtp_sess);
			rtp_state_fill_rtp(rtp_state, &rtp_hdr, pt, mark, delta_ts);
			rtp_hdr.x = rtp_extension;
			rc = rtp_session_send_hook2(vrtp->rtp_sess, &rtcp_flag, &rtp_hdr,
				tx_buf, length + rtp_header_extension_length, 
				vrtp->config.on_tx_udp, vrtp->config.user_data);
			if (rc == 0) {
				receiver_process_rtcp_packet(vrtp, rtcp_flag);
			} 
		}
	}
	
	return 0;
}


// unsigned short id : 5;
// unsigned short end : 2;
// unsigned short key : 1;
static int sender_standard_h264_send_nal(videortp_t *vrtp, unsigned mark, unsigned pt, uint8_t *nal_payload, int length)
{
	video_debug_write_record_file(VIDEO_ENC_OUT, nal_payload, length);
	video_stats_bandwidth_update_send_rtp_bytes(length);
	video_stats_sender_on_sent_packet(TimeInMilliseconds());

	if(vrtp->h264_packetizer){
		const uint8_t *payload;
		size_t payload_len;
		int status;
		unsigned tmp_mark;

		//h264_packetize func change nal_payload, so we need copy it to tx_buf first, let nal_payload unchanged.
		unsigned int processed = 0;
		uint8_t *tx_buf = (uint8_t*)_alloca(length);
		memcpy(tx_buf, nal_payload, length);

		while(processed < length){
			status = h264_packetize(vrtp->h264_packetizer, (uint8_t *)tx_buf, length, &processed, &payload, &payload_len);
			if (status != 0) {
				return status;
			}

			if(DEBUG_TX){
			Dbg("%s:%d: sender_standard_h264_send_nal mark: %d processed: %u payload_len: %d.", 
				__FILE__, __LINE__, mark, processed, payload_len);
			}
			//input mark =1, means last nal, rtp mark = 1, we need last nal 's last packet.
			if (mark && (processed >= length)){
				tmp_mark = 1;
			} else {
				tmp_mark = 0;
			}
			sender_standard_h264_send_packet(vrtp, tmp_mark, pt, payload, payload_len);
		}
	} else {
		int tn = length;
		int start_code_length = 0;
	
		//comment, remove nal start code
		if (nal_payload && nal_payload[0] == 0 && nal_payload[1] == 0 && nal_payload[2] == 0 && nal_payload[3] == 1) {
			start_code_length = 4;
			if (length - start_code_length > 0) {
				tn = length - start_code_length;
			} else {
				return -1;
			}
		}
		else if (nal_payload && nal_payload[0] == 0 && nal_payload[1] == 0 && nal_payload[2] == 1) {
			start_code_length = 3;
			if (length - start_code_length > 0) {
				tn = length - start_code_length;
			} else {
				return -1;
			}
		}
		
		sender_standard_h264_send_packet(vrtp, mark, pt, nal_payload + start_code_length, tn);
	}



	return 0;
}


static void sender_standard_h264_packetize_x264_nals(videortp_t *vrtp, unsigned pt, x264_nal_t *xnals, int num_nals)
{
	int i;

	if(DEBUG_TX){
	Dbg("%s:%d: sender_standard_h264_packetize_x264_nals num_nals: %d.", __FILE__, __LINE__, num_nals);
	}
	
	for (i = 0;i < num_nals;++i){
		unsigned mark = 0;
		x264_nal_t* nal = &xnals[i];
		if (xnals[i].i_type == NAL_SPS) {
			if (DEBUG_TX) {
				Dbg("A SPS is being sent.");
			}
		}else if (xnals[i].i_type == NAL_PPS) {
			if (DEBUG_TX) {
				Dbg("A PPS is being sent.");
			}
		}else if (xnals[i].i_type == NAL_SLICE_IDR) {
			if (DEBUG_TX) {
				Dbg("A IDR is being sent.");
			}
		}

		if (i == num_nals -1){
			mark = 1;
			if (DEBUG_TX) {
				Dbg("A frame end.");
			}
		}
		sender_standard_h264_send_nal(vrtp, mark , pt, nal->p_payload, nal->i_payload);
	}
}


void sender_h264_packetize_nal(videortp_t *vrtp, int index, int total, int key_frame, unsigned pt, uint8_t	*data, int data_size){
	int i; 
	unsigned mark = 0;

	if(DEBUG_TX){
	Dbg("%s:%d: sender_h264_packetize_nal index: %d total: %d key_frame: %d data_size: %d.", __FILE__, __LINE__, 
		index, total, key_frame, data_size);
	}
	
	if (index == total -1){
		mark = 1;
		if(DEBUG_TX){
		Dbg("A frame end.");
		}
	}

	//pt=97 rtp ts = vrtp->delta_ts
	//pt=101 rtp ts += vrtp->delta_ts
	if (index == 0){
		if (pt == REC_COMMON_VIDEO_PT){
			vrtp->delta_ts = VIDEO_CLOCK * vrtp->config.fps_den / vrtp->config.fps_num;
		} else {
			vrtp->delta_ts += VIDEO_CLOCK * vrtp->config.fps_den / vrtp->config.fps_num;
		}
	}else {
		if (pt == REC_COMMON_VIDEO_PT){
			vrtp->delta_ts = 0;
		} else {
			//do nothing
		}
	}

	if (pt == REC_COMMON_VIDEO_PT){
		sender_custom_h264_send_fragment(vrtp, index, key_frame, mark, pt, data, data_size);
	} else {
		sender_standard_h264_send_nal(vrtp, mark, pt, data, data_size);
	}
}
/******************************standard_h264发送处理 end***************************/

#if 0
#endif


/******************************congestion control处理 start***************************/

int congestion_control_on_log(void *userdata, int level, const char* file, int line, const char* fmt, va_list vl){
	videortp_t *vrtp = (videortp_t *)userdata;

	int n;
	n = _vscprintf(fmt, vl);
	if (DEBUG_CC && n > 0 && level >= 1 && vrtp) {
		char *buf = (char*)_alloca((size_t)(n+3));
		vsprintf(buf, fmt, vl);
		Dbg("%s.", buf);
	}
}


/* 发送端回调。运行在sim_heartbeat方法调用线程。sim_send_video->cc缓存,然后sim_heartbeat->pacing判断可以发送->回调 */
void congestion_control_sender_on_send_fragment(sim_segment_t* seg, void *userdata){

	videortp_t *vrtp = (videortp_t *)userdata;
	
	if(DEBUG_TX){
	Dbg("%s:%d: congestion_control_sender_on_send_fragment.", __FILE__, __LINE__);
	}

	sender_h264_packetize_nal(vrtp, seg->index, seg->total, seg->key_frame, seg->payload_type, seg->data, seg->data_size);

}

/* 发送端回调。运行在sim_heartbeat方法调用线程。 sim_heartbeat->cc判断带宽估计是否变化->回调 */
/* 或者sim_recv_bitrate_feedback调用线程    . sim_recv_bitrate_feedback->cc判断带宽估计是否变化->回调 */
/*bw 估计码率，单位：kbps*/
void congestion_control_sender_on_change_bitrate(uint32_t bw, int lost, void *userdata){
	videortp_t *vrtp = (videortp_t *)userdata;

	if(DEBUG_CC){
	Dbg("%s:%d: congestion_control_sender_on_change_bitrate bw: %d lost: %d.", __FILE__, __LINE__, bw, lost);
	}
	
	//回调时编码器可能未创建
	if (vrtp->encoder) {
		video_encoder_api_on_bitrate_updated(vrtp->encoder, bw*1000, lost, 0);
	}
}

/* 接收端回调。运行在sim_heartbeat方法调用线程，sim_heartbeat->cc判断需要发送remb->回调 */
void congestion_control_receiver_on_send_bitrate_feedback(uint32_t estimate_bitrate, void *userdata){
	videortp_t *vrtp = (videortp_t *)userdata;

	if(DEBUG_CC){
	Dbg("%s:%d: congestion_control_receiver_on_send_bitrate_feedback estimate_bitrate: %d.", __FILE__, __LINE__, estimate_bitrate);
	}
	video_stats_receiver_on_report_cc_bitrate(estimate_bitrate);
	
	rtp_session_send_rtcp_fb_tmmbr(vrtp->rtp_sess, estimate_bitrate);
	vrtp->send_cc_feedback = TRUE;
}


void congestion_control_create(videortp_t *vrtp, const videortp_config_t *config){
	int max_bitrate, target_bitrate, min_bitrate;

	get_start_config_bitrate(config, &max_bitrate, &target_bitrate, &min_bitrate);
	{
	sim_callback_t callback = {0};
	callback.userdata = vrtp;
	callback.log_cb = &congestion_control_on_log;
	callback.send_fragment_cb = &congestion_control_sender_on_send_fragment;
	callback.change_bitrate_cb = &congestion_control_sender_on_change_bitrate;
	callback.send_bitrate_feedback_cb = &congestion_control_receiver_on_send_bitrate_feedback;
	sim_init(gcc_transport, 0, min_bitrate, target_bitrate, max_bitrate, &callback);
	}

	Dbg("congestion_control_create min_bitrate: %d target_bitrate: %d max_bitrate: %d.", min_bitrate, target_bitrate, max_bitrate);
}


void congestion_control_destroy(videortp_t *vrtp){
	sim_destroy();

	Dbg("congestion_control_destroy.");
}


/******************************congestion control处理 end***************************/

#if 0
#endif


/******************************x264 encoder处理 start***************************/

#ifndef IDR_INTERVAL
#define IDR_INTERVAL 8
#endif

#ifndef NAL_TIMESTAP_ENC
#define NAL_TIMESTAP_ENC 3000
#endif

#ifndef SEND_WIDTH
#define SEND_WIDTH 320
#endif

#ifndef SEND_HEIGHT
#define SEND_HEIGHT 320
#endif

#ifndef SEND_FPS
#define SEND_FPS 15
#endif

#ifndef SEND_BITRATE
#define SEND_BITRATE 180*1000
#endif


#ifndef RC_MARGIN
#define RC_MARGIN 10000
#endif

#define DEFAULT_MAX_PAYLOAD_SIZE 1440

static int max_payload_size = DEFAULT_MAX_PAYLOAD_SIZE;

int x264_encoder_get_payload_max_size(){
	return max_payload_size;
}

static void x264_encoder_set_linephone_param(x264_param_t* params)
{
	float bitrate;
	int csp = X264_CSP_I420;
	int iframerate = REC_COMMON_VIDEO_FPS_NUM;

	params->i_threads=1;
	params->i_sync_lookahead=0;
	params->i_width = SEND_WIDTH; 
	params->i_height = SEND_HEIGHT; 
	params->i_fps_num=(int)iframerate;
	params->i_fps_den=1;
	params->i_slice_max_size=x264_encoder_get_payload_max_size()-100; /*-100 security margin*/
	params->i_level_idc=13;

	bitrate=(float)SEND_BITRATE*0.92;
	if (bitrate>RC_MARGIN)
		bitrate-=RC_MARGIN;

#ifndef ANDROID	
	params->rc.i_rc_method = X264_RC_ABR;
	params->rc.i_bitrate=(int)(bitrate/1000);
	params->rc.f_rate_tolerance=0.1;
	params->rc.i_vbv_max_bitrate=(int) ((bitrate+RC_MARGIN/2)/1000);
	params->rc.i_vbv_buffer_size=params->rc.i_vbv_max_bitrate;
	params->rc.f_vbv_buffer_init=0.5;
#else
	params.rc.i_rc_method = X264_RC_CQP;
	params.rc.i_bitrate=(int)(bitrate/1000);
#endif
	params->rc.i_lookahead=0;

	params->b_repeat_headers=1;
	params->b_annexb=0;

	//these parameters must be set so that our stream is baseline
	params->analyse.b_transform_8x8 = 0;
	params->b_cabac = 0;
	params->i_cqm_preset = X264_CQM_FLAT;
	params->i_bframe = 0;
	params->analyse.i_weighted_pred = X264_WEIGHTP_NONE;
}

static void x264_encoder_set_param_t(x264_param_t* params)
{
	float bitrate;
	int csp = X264_CSP_I420;
	int iframerate = REC_COMMON_VIDEO_FPS_NUM;

	x264_param_default(params);

	x264_param_default_preset(params, "slow" , "zerolatency" );

	params->i_threads=1;
	params->i_sync_lookahead=0;
	params->i_width = SEND_WIDTH; 
	params->i_height = SEND_HEIGHT; 

	params->i_fps_num = iframerate;          
	params->i_fps_den = 1;

	params->i_slice_max_size=x264_encoder_get_payload_max_size()-100; /*-100 security margin*/

	bitrate=(float)SEND_BITRATE*0.92;
	if (bitrate>RC_MARGIN){
		bitrate-=RC_MARGIN;
	}

	// rc
	params->rc.i_rc_method = X264_RC_ABR;
	params->rc.i_bitrate = (int)bitrate/1000; 
	//must i_vbv_max_bitrate <= i_bitrate reconfig available
	params->rc.i_vbv_max_bitrate = (int)((bitrate)/1000) ; 
	params->rc.i_vbv_buffer_size = (int)((bitrate*2)/1000) ;
	params->rc.f_vbv_buffer_init=0.5;
	params->rc.b_mb_tree=0;//
	params->rc.f_rf_constant = 25; 
	params->rc.f_rf_constant_max = 45; 
	params->rc.f_rate_tolerance=0.1;
	params->rc.b_stat_write = 1;

	params->rc.i_lookahead=0;

	params->i_keyint_max = iframerate * 2;
	params->i_keyint_min = iframerate * 2;

	params->b_repeat_headers = 1;  //
	params->b_annexb= 1;
	params->b_cabac = 1;              

	params->i_cqm_preset = X264_CQM_FLAT;
	params->i_bframe = 0;
	params->analyse.i_weighted_pred = X264_WEIGHTP_NONE;

	params->i_csp=csp;
	params->i_level_idc = 30;
	x264_param_apply_profile(params, x264_profile_names[0]);
	
	params->i_log_level = X264_LOG_WARNING;
}


void x264_encoder_create(videortp_t *vrtp, const videortp_config_t *config){
	x264_param_t params = {0};
	x264_param_t params_print = {0};
	
	x264_encoder_set_param_t(&params);
	vrtp->enc_params = x264_encoder_open(&params);
	x264_encoder_parameters(vrtp->enc_params, &params_print);
	Dbg("x264_encoder_create bit_rate: %d kb/s, i_rc_method: %d ", params_print.rc.i_bitrate, params_print.rc.i_rc_method);
	Dbg("x264_encoder_create i_vbv_max_bitrate: %d kb/s, i_vbv_buffer_size: %d ", params_print.rc.i_vbv_max_bitrate, params_print.rc.i_vbv_buffer_size);
	Dbg("x264_encoder_create keyint_max: %d, i_keyint_min: %d ", params_print.i_keyint_max, params_print.i_keyint_min);

}

void x264_encoder_destroy(videortp_t *vrtp){
	if (vrtp->enc_params){
		x264_encoder_close(vrtp->enc_params);
	}
	Dbg("x264_encoder_destroy.");
}


/******************************x264 encoder处理 end***************************/
#if 0
#endif

/******************************ffmpeg encoder处理 start***************************/


void ffmpeg_encoder_on_encoder_encoded_image(const EncodedImage *encoded_image, void *userdata){
	int i;
	videortp_t *vrtp = (videortp_t *)userdata;
	
	if (encoded_image != NULL && vrtp != NULL) {

	    if(DEBUG_TX){
		Dbg("%s:%d: ffmpeg_encoder_on_encoder_encoded_image key: %d len: %d qp: %d, PT:%u.", __FILE__, __LINE__, 
			encoded_image->key_frame, encoded_image->size_, encoded_image->qp_, encoded_image->pt_);
		Dbg("%s:%d: ffmpeg_encoder_on_encoder_encoded_image encode_start_ms: %I64d encode_finish_ms: %I64d fragmentationSize: %d.", __FILE__, __LINE__, 
				encoded_image->encode_start_ms, encoded_image->encode_finish_ms, encoded_image->fragmentation_header_.fragmentationVectorSize);
		
		}
		if(DEBUG_TX){
		for (i = 0;i < encoded_image->fragmentation_header_.fragmentationVectorSize;++i){
		Dbg("%s:%d: ffmpeg_encoder_on_encoder_encoded_image index: %d fragmentationLength: %d.", __FILE__, __LINE__, 
				i, encoded_image->fragmentation_header_.fragmentationLength[i]);

		}
		}
		video_stats_sender_on_encoded_frame(encoded_image->encode_finish_ms, 
			encoded_image->encode_finish_ms - encoded_image->encode_start_ms, encoded_image->key_frame);

		
		//采用cc控制发送
		if(vrtp->remote_support_cc){
			sim_send_video((EncodedImage *)encoded_image);
		}
		//不采用cc直接发送
		else {
			int use_fragment_send = 1;
			//采用新分片发送
			if (use_fragment_send){
				for (i = 0;i < encoded_image->fragmentation_header_.fragmentationVectorSize;++i){
					sender_h264_packetize_nal(vrtp, i, 
						encoded_image->fragmentation_header_.fragmentationVectorSize, 
						encoded_image->key_frame,
						encoded_image->pt_,
						&(encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]]),
						encoded_image->fragmentation_header_.fragmentationLength[i]);
				}
			}
			//采用旧分片发送
			else {
				if (encoded_image->pt_ == REC_COMMON_VIDEO_PT){
					sender_custom_h264_packetize_and_send(vrtp, encoded_image->key_frame, encoded_image->pt_,
								encoded_image->encoded_data_, encoded_image->size_);
				} else {
					for (i = 0;i < encoded_image->fragmentation_header_.fragmentationVectorSize;++i){
						sender_h264_packetize_nal(vrtp, i, 
							encoded_image->fragmentation_header_.fragmentationVectorSize, 
							encoded_image->key_frame,
							encoded_image->pt_,
							&(encoded_image->encoded_data_[encoded_image->fragmentation_header_.fragmentationOffset[i]]),
							encoded_image->fragmentation_header_.fragmentationLength[i]);
					}
				}
			}
		}
	}
}


void ffmpeg_encoder_create(videortp_t *vrtp, const videortp_config_t *config){
	int max_bitrate, target_bitrate, min_bitrate;
	VideoEncoderObserver video_encoder_observer = {0};
	VideoEncoderConfig encoder_config = {0};
	VideoCodingLogCallBack log_func = {0};

	get_start_config_bitrate(config, &max_bitrate, &target_bitrate, &min_bitrate);
	
	video_encoder_observer.OnEncodedImage = &ffmpeg_encoder_on_encoder_encoded_image;
	video_encoder_observer.userdata = vrtp;
	log_func.log_fn = &video_coding_on_log;
	log_func.userdata = vrtp;
	vrtp->encoder = video_encoder_api_new(&video_encoder_observer, &log_func);
	
	encoder_config.color_space = VIDEO_FORMAT_I420;
	encoder_config.encode_id = CODEC_ID_H264;
	encoder_config.width = config->tx_width;
	encoder_config.height = config->tx_height;
	encoder_config.max_bitrate = max_bitrate/1000; //kbps
	encoder_config.target_bitrate = target_bitrate/1000; //kbps
	encoder_config.min_bitrate = min_bitrate/1000; //kbps
	encoder_config.max_framerate = config->fps_num;
	encoder_config.target_framerate = config->fps_num;
	encoder_config.min_framerate = config->fps_num > 3 ? 3 : config->fps_num;
	encoder_config.key_frame_interval = config->fps_num * 2;
	encoder_config.target_qp = 24;
	encoder_config.max_qp = 37;
	encoder_config.min_qp = 10;
	video_encoder_api_configure_encoder(vrtp->encoder, &encoder_config, get_mtu(config->mtu) - 5/*padding*/ - ((sizeof(h26x_hdr)-2 + 32/*rtp_header_extension_length*/)));

	Dbg("ffmpeg_encoder_create color_space: %d encode_id: %d width: %d height: %d.", 
		encoder_config.color_space, encoder_config.encode_id, encoder_config.width, encoder_config.height);
	Dbg("ffmpeg_encoder_create max_bitrate: %d min_bitrate: %d target_bitrate: %d.", 
		max_bitrate, min_bitrate, target_bitrate);
	Dbg("ffmpeg_encoder_create min_framerate: %d key_frame_interval: %d target_qp: %d.", 
		encoder_config.min_framerate, encoder_config.key_frame_interval, encoder_config.target_qp);

}


void ffmpeg_encoder_destory(videortp_t *vrtp){
	if (vrtp->encoder != NULL) {
		video_encoder_api_stop(vrtp->encoder);
		video_encoder_api_destroy(vrtp->encoder);
	}
	Dbg("ffmpeg_encoder_destory.");
}


/******************************ffmpeg encoder处理 end***************************/

#if 0
#endif

/******************************jitter buffer处理 start***************************/


int jitter_buffer_on_log(void *userdata, int level, const char* file, int line, const char* fmt, va_list vl){

	videortp_t *vrtp = (videortp_t *)userdata;

	int n;
	n = _vscprintf(fmt, vl);
	if (DEBUG_RX && n > 0 && vrtp && level >= VIDEO_JBUFFER_DEBUG_TRACE) {
		char *buf = (char*)_alloca((size_t)(n+3));
		vsprintf(buf, fmt, vl);
		Dbg("%s.", buf);
	}
}


void jitter_buffer_create(videortp_t *vrtp, const videortp_config_t *config){
	VideoJBufferObserver video_jbuffer_observer;
	VideoJBufferLogCallBack log_func = {0};
	
	video_jbuffer_observer.OnReceiveEncodedImage = &receiver_h264_on_receive_encoded_image;
	video_jbuffer_observer.RequestKeyFrame = &receiver_standard_h264_on_jbuffer_request_key_frame;
	video_jbuffer_observer.userdata = vrtp;
	log_func.log_fn = &jitter_buffer_on_log;
	log_func.userdata = vrtp;
	vrtp->jbuffer = video_jbuffer_api_new(&video_jbuffer_observer, &log_func);
	
	Dbg("jitter_buffer_create.");
}


void jitter_buffer_destory(videortp_t *vrtp){
	if (vrtp->jbuffer != NULL) {
		video_jbuffer_api_destroy(vrtp->jbuffer);
	}
	Dbg("jitter_buffer_destory.");
}


/******************************jitter buffer处理 end***************************/



static rtp_session_t *videortp_internal_create_rtp_session(const videortp_config_t *config)
{
	rtp_session_t *rtp_sess;
	struct in_addr addr;
	int rc;
	addr.s_addr = config->local_ip;
	rc = rtp_session_create(inet_ntoa(addr), config->local_rtp_port, 2, &rtp_sess);
	if (rc != 0)
		return 0;
	addr.s_addr = config->remote_ip;
	rtp_session_reset(rtp_sess, config->dir, inet_ntoa(addr), config->remote_rtp_port, config->remote_rtp_port+1);
	{
		// set to a larger recv buffer, so that it will not overflow
		int rtp_fd = -1/*INVALID_SOCKET*/;
		int buf_size = 1<<20;
		rtp_session_get_raw_fd(rtp_sess, &rtp_fd, NULL);
		if (rtp_fd != -1/*INVALID_SOCKET*/) {
			setsockopt(rtp_fd, SOL_SOCKET, SO_RCVBUF, (const char*)&buf_size, sizeof(buf_size));
			setsockopt(rtp_fd, SOL_SOCKET, SO_SNDBUF, (const char*)&buf_size, sizeof(buf_size));
		}
	}

	return rtp_sess;
}


int video_stats_on_log(void *userdata, int level, const char* file, int line, const char* fmt, va_list vl){
	videortp_t *vrtp = (videortp_t *)userdata;

	int n;
	n = _vscprintf(fmt, vl);
	if (n > 0 && vrtp) {
		char *buf = (char*)_alloca((size_t)(n+3));
		vsprintf(buf, fmt, vl);
		Dbg("%s.", buf);
	}
}


/******************************对外api start***************************/

int videortp_create(const videortp_config_t *config, videortp_t **p_rtp)
{
	int i, rc;

	videortp_t *vrtp = ZALLOC_T(videortp_t);
	vrtp->prev_dec_ms = TimeInMilliseconds();
	vrtp->recv_cc_feedback_ms = TimeInMilliseconds();
	vrtp->send_cc_feedback = 0;
	vrtp->recv_cc_feedback = 0;
	vrtp->remote_support_cc = 0;
	memcpy((void *)(&vrtp->config), (const void *)config, sizeof(videortp_config_t));

	Dbg("videortp_create local_pt: %d local_ip: %d local_rtp_port: %d.", config->local_pt, config->local_ip, config->local_rtp_port);
	Dbg("videortp_create remote_pt: %d remote_ip: %d remote_rtp_port: %d.", config->remote_pt, config->remote_ip, config->remote_rtp_port);
	Dbg("videortp_create tx_width: %d tx_height: %d.", config->tx_width, config->tx_height);
	Dbg("videortp_create rx_width: %d rx_height: %d.", config->rx_width, config->rx_height);
	Dbg("videortp_create capture_width: %d capture_height: %d.", config->capture_width, config->capture_height);
	Dbg("videortp_create fps_num: %d bit_rate: %d dir: %d.", config->fps_num, config->bit_rate, config->dir);

	INIT_LIST_HEAD(&vrtp->free_part_list);
	for (i = 0; i < FRAME_WIN_SIZE; ++i) {
		rtpframe_t *frame = &vrtp->frame_win[i];
		INIT_LIST_HEAD(&frame->part_list);
		frame->id = i;
	}
	vrtp->delta_ts = VIDEO_CLOCK * config->fps_den / config->fps_num;
	vrtp->rtp_sess = videortp_internal_create_rtp_session(config);
	if (!vrtp->rtp_sess)
		goto on_error;

	{
	VideoStatsLogCallBack log_func;
	log_func.log_fn = &video_stats_on_log;
	log_func.userdata = vrtp;
	video_stats_init(&log_func);
	}
	jitter_buffer_create(vrtp, config);
	vrtp->rtp_header_extension = rtp_header_extension_api_new();
	
	if (config->dir & DIR_RX) {
		decoder_create(vrtp, config);

		video_debug_open_play_file();
	}
	if (config->dir & DIR_TX) {
		ffmpeg_encoder_create(vrtp, config);

		video_debug_open_record_file();

		vrtp->framenum = 0;
	}

	congestion_control_create(vrtp, config);
	{
		h264_packetizer_cfg cfg;
		cfg.mtu = get_mtu(config->mtu);
		cfg.mode = H264_PACKETIZER_MODE_NON_INTERLEAVED;
		cfg.unpack_nal_start = 3;
		h264_packetizer_create(&cfg, &(vrtp->h264_packetizer));
	}
	
	*p_rtp = vrtp;
	return 0;

on_error:
	videortp_destroy(vrtp);
	return -1;
}

void videortp_destroy(videortp_t *vrtp)
{	
	videortp_config_t *config;

	if (!vrtp){
		return;
	}
	config = &vrtp->config;

	Dbg("videortp_destroy.");

	receiver_clear_window(vrtp);
	while (!list_empty(&vrtp->free_part_list)) {
		rtpframe_part_t *part = list_first_entry(&vrtp->free_part_list, rtpframe_part_t, entry);
		list_del(&part->entry);
		free(part);
	}

	congestion_control_destroy(vrtp);
	video_stats_uninit();
	jitter_buffer_destory(vrtp);
	rtp_header_extension_api_destroy(vrtp->rtp_header_extension);
	h264_packetizer_destroy(vrtp->h264_packetizer);
	
	rtp_session_destroy(vrtp->rtp_sess);
	vrtp->rtp_sess = NULL;

	if (config->dir & DIR_RX) {
		decoder_destroy(vrtp);
		
		video_debug_close_play_file();
	}
	if (config->dir & DIR_TX) {
		ffmpeg_encoder_destory(vrtp);

		video_debug_close_record_file();
	}
	free(vrtp);
}

int videortp_start(videortp_t *vrtp)
{
	int rc;
	ReceiverConfigStats receiver_config_stats;
	SenderConfigStats sender_config_stats;
	int64_t now = TimeInMilliseconds();
	vrtp->rtp_start_ms = now;
	
	video_jbuffer_api_start(vrtp->jbuffer);

	if (vrtp->config.dir & DIR_RX) {
#ifdef _WIN32
		vrtp->evt = CreateEventA(NULL, FALSE, FALSE, NULL);
		vrtp->recv_thread = (HANDLE)_beginthreadex(NULL, 0, &recv_proc, vrtp, 0, NULL);
#else
		sem_init(&vrtp->sem_evt, 0, 0);
		int err = pthread_create(&vrtp->recv_threadid, NULL, recv_proc, vrtp);
		if (0 == err) {
			Dbg("create vrtp recv thread success, %lu.", vrtp->recv_threadid);
		}
		else {
			Dbg("create vrtp recv thread failed.");
		}
#endif
	}
	Dbg("videortp_start.");

	receiver_config_stats.remote_pt = vrtp->config.remote_pt;
	receiver_config_stats.local_ip = vrtp->config.local_ip;
	receiver_config_stats.local_rtp_port = vrtp->config.local_rtp_port;
	receiver_config_stats.rx_width = vrtp->config.rx_width;
	receiver_config_stats.rx_height = vrtp->config.rx_height;
	receiver_config_stats.bit_rate = vrtp->config.bit_rate;
	video_stats_receiver_on_started(now, &receiver_config_stats);

	sender_config_stats.local_pt = vrtp->config.local_pt;
	sender_config_stats.remote_ip = vrtp->config.remote_ip;
	sender_config_stats.remote_rtp_port = vrtp->config.remote_rtp_port;
	sender_config_stats.mtu = vrtp->config.mtu;
	sender_config_stats.tx_height = vrtp->config.tx_height;
	sender_config_stats.tx_width = vrtp->config.tx_width;
	sender_config_stats.capture_width = vrtp->config.capture_width;
	sender_config_stats.capture_height = vrtp->config.capture_height;
	sender_config_stats.fps_den = vrtp->config.fps_den;
	sender_config_stats.fps_num = vrtp->config.fps_num;
	sender_config_stats.fps_num = vrtp->config.fps_num;
	sender_config_stats.bit_rate = vrtp->config.bit_rate;
	video_stats_sender_on_started(now, &sender_config_stats);
	return 0;
}

void videortp_stop(videortp_t* vrtp)
{
	int64_t now = TimeInMilliseconds();
	Dbg("start call videortp_stop.");
#ifdef _WIN32
	if (vrtp->evt) {
		SetEvent(vrtp->evt);
		if (vrtp->recv_thread) {
			WaitForSingleObject(vrtp->recv_thread, INFINITE);
			CloseHandle(vrtp->recv_thread);
			vrtp->recv_thread = NULL;
		}
		CloseHandle(vrtp->evt);
		vrtp->evt = NULL;
	}
#else
	if (&vrtp->sem_evt) {
		sem_post(&vrtp->sem_evt);
		if (0 != vrtp->recv_threadid) {
			pthread_join(vrtp->recv_threadid, NULL);
			vrtp->recv_threadid = 0;
		}
		sem_destroy(&vrtp->sem_evt);
	}
#endif

	Dbg("stop rtp recv thread.");

	video_stats_receiver_on_stopped(now);
	video_stats_sender_on_stopped(now);
	
	video_jbuffer_api_stop(vrtp->jbuffer);
	Dbg("videortp_stop func end.");
}

int videortp_send_frame(videortp_t *vrtp, const video_frame *frame)
{
	if (vrtp && (vrtp->config.dir & DIR_TX)) {
		int64_t now;

		if(DEBUG_TX){
		Dbg("%s:%d: videortp_send_frame width: %d height: %d format: %d.", __FILE__, __LINE__, frame->width, frame->height, frame->format);
		}
		
		if (VIDEO_FORMAT_RGB24 != frame->format)
		{	
			unsigned char *video_debug_buf;
			int length = frame->width*frame->height*3/2;
			video_debug_buf = (unsigned char *)malloc(length);
			yuv_buffers_combine_to_one(frame, video_debug_buf);
			video_debug_write_record_file(VIDEO_CAPTURE_OUT, video_debug_buf, length);
			free(video_debug_buf);
		}

		if (vrtp->force_key_frames) {
			video_encoder_api_send_key_frame(vrtp->encoder);
			vrtp->force_key_frames = 0;

			if(DEBUG_TX){
			Dbg("%s:%d: videortp_send_frame force_key_frames.", __FILE__, __LINE__);

			}
		}
		//在编码器中固定i帧间隔为2s，不再需要自己主动设置了
#if 0
		else {
			int start_key_interval = vrtp->config.fps_num / vrtp->config.fps_den / 2;
			if (start_key_interval == 0)
				start_key_interval = 1;
			if (vrtp->framenum/start_key_interval <= FIRST_KEY_FRAME_SIZE) {
				if (vrtp->framenum % start_key_interval == 0) {
					video_encoder_api_send_key_frame(vrtp->encoder);
					if(DEBUG_TX){
					Dbg("%s:%d: videortp_send_frame framenum: %d force_key_frames.", __FILE__, __LINE__, vrtp->framenum);
					}
				}
			}
		}
#endif
	
		video_encoder_api_on_frame(vrtp->encoder, vrtp->config.local_pt, frame);
		vrtp->framenum++;

		//从未收到cc_feedback估计带宽，远端不支持流量控制，将码率设为配置值
		now = TimeInMilliseconds();
		if ((vrtp->recv_cc_feedback == FALSE) && (now-vrtp->recv_cc_feedback_ms >= 10*1000)){		
			Dbg("videortp_send_frame, never receive cc feedback, remote don't support .");

			sim_recv_bitrate_feedback(vrtp->config.bit_rate/*bps*/);
			vrtp->recv_cc_feedback = TRUE;
		}
	} else {
		return -1;
	}

	return 0;
}


int videortp_send_yuvframe(videortp_t *vrtp, const video_frame *vframe)
{
	videortp_send_frame(vrtp, vframe);

	return 0;
}

int videortp_reconfig_local_pt(videortp_t *vrtp, unsigned int local_pt){
	Dbg("videortp_reconfig_local_pt:%u .", local_pt);

	vrtp->config.local_pt = local_pt;
}


bool videortp_thread_valid(videortp_t* vrtp) 
{
	bool bret = true;
#ifdef _WIN32
	bret = vrtp->recv_thread != NULL ? true : false;
#else
	bret = vrtp->recv_threadid != 0 ? true : false;
#endif
	return bret;
}

int videortp_force_key_frame(videortp_t *vrtp)
{
	int iret = -1;
	if (videortp_thread_valid(vrtp))
	{
		receiver_force_key_frame(vrtp);
		iret = 0;
	}
	return iret;
}

/******************************对外api end***************************/