手中的板子的CPU是三星coretex-a9的，板子有硬編能力（至於是哪個芯片沒仔細看），通過一至兩週的努力，成功實現硬編碼成H.264並投遞到rtmp服務器。大體實現如下：
1.使用ffmpeg取攝像頭YUV數據；
2.將YUV數據餵給三星硬編API；
3.將硬編的數據通過librtmp投遞；
廢話少說，上代碼，代碼有些糙，將就看：
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libswscale/swscale.h>
#include <librtmp/rtmp.h>
#include <nx_fourcc.h>
#include <nx_vip.h> // VIP
#include <nx_dsp.h> // Display
#include “nx_video_api.h” // Video En/Decoder
#include “sps_decode.h”
#define MAX_FILE_NAME 1024
#define MAX_SEQ_BUF_SIZE (4*1024)
//定義包頭長度，RTMP_MAX_HEADER_SIZE=18
#define RTMP_HEAD_SIZE (sizeof(RTMPPacket)+RTMP_MAX_HEADER_SIZE)
//存儲Nal單元數據的buffer大小
#define BUFFER_SIZE 327680
#define MAX_PACKET_BYTES (RTMP_HEAD_SIZE+BUFFER_SIZE)
//搜尋Nal單元時的一些標誌
#define GOT_A_NAL_CROSS_BUFFER BUFFER_SIZE+1
#define GOT_A_NAL_INCLUDE_A_BUFFER BUFFER_SIZE+2
#define NO_MORE_BUFFER_TO_READ BUFFER_SIZE+3
enum
{
VIDEO_CODECID_H264 = 7,
};
/**
* _NaluUnit
* 內部結構體。該結構體主要用於存儲和傳遞Nal單元的類型、大小和數據
*/
typedef struct _NaluUnit
{
int type;
int size;
unsigned char *data;
}NaluUnit;
typedef struct _RTMPMetadata
{
// video, must be h264 type
unsigned int nWidth;
unsigned int nHeight;
unsigned int nFrameRate; // fps
unsigned int nVideoDataRate; // bps
unsigned int nSpsLen;
unsigned char* Sps;
unsigned int nPpsLen;
unsigned char* Pps;
// audio, must be aac type
bool bHasAudio;
unsigned int nAudioDatarate;
unsigned int nAudioSampleRate;
unsigned int nAudioSampleSize;
int nAudioFmt;
unsigned int nAudioChannels;
char pAudioSpecCfg;
unsigned int nAudioSpecCfgLen;
} RTMPMetadata,*LPRTMPMetadata;
static void dumpdata( void *data, int len, const char *msg )
{
int i=0;
unsigned char *byte = (unsigned char *)data;
printf(“Dump Data : %s”, msg);
for( i=0 ; i<len ; i ++ )
{
if( i!=0 && i%16 == 0 ) printf("\n\t");
printf("%.2x", byte[i] );
if( i%4 == 3 ) printf(" “);
}
printf(”\n");
}
//網絡字節序轉換
char * put_byte( char *output, uint8_t nVal )
{
output[0] = nVal;
return output+1;
}
char * put_be16(char *output, uint16_t nVal )
{
output[1] = nVal & 0xff;
output[0] = nVal >> 8;
return output+2;
}
char * put_be24(char *output,uint32_t nVal )
{
output[2] = nVal & 0xff;
output[1] = nVal >> 8;
output[0] = nVal >> 16;
return output+3;
}
char * put_be32(char *output, uint32_t nVal )
{
output[3] = nVal & 0xff;
output[2] = nVal >> 8;
output[1] = nVal >> 16;
output[0] = nVal >> 24;
return output+4;
}
char * put_be64( char *output, uint64_t nVal )
{
output=put_be32( output, nVal >> 32 );
output=put_be32( output, nVal );
return output;
}
char * put_amf_string( char *c, const char *str )
{
uint16_t len = strlen( str );
c=put_be16( c, len );
memcpy(c,str,len);
return c+len;
}
char * put_amf_double( char *c, double d )
{
c++ = AMF_NUMBER; / type: Number */
{
unsigned char *ci, *co;
ci = (unsigned char *)&d;
co = (unsigned char *)c;
co[0] = ci[7];
co[1] = ci[6];
co[2] = ci[5];
co[3] = ci[4];
co[4] = ci[3];
co[5] = ci[2];
co[6] = ci[1];
co[7] = ci[0];
}
return c+8;
}
unsigned int g_nStop;
unsigned int m_nFileBufSize;
unsigned int nalhead_pos;
RTMP* m_pRtmp;
RTMPMetadata g_metaData;
char m_pBuff[MAX_PACKET_BYTES];
unsigned char *m_pFileBuf;
unsigned char m_pFileBuf_tmp;
unsigned char m_pFileBuf_tmp_old; //used for realloc
/**
* 初始化並連接到服務器
*
* @param url 服務器上對應webapp的地址
*
* @成功則返回1 , 失敗則返回0
/
int RTMP264_Connect(const char url)
{
nalhead_pos=0;
m_nFileBufSize=BUFFER_SIZE;
m_pFileBuf=(unsigned char*)malloc(BUFFER_SIZE);
m_pFileBuf_tmp=(unsigned char*)malloc(BUFFER_SIZE);
m_pRtmp = RTMP_Alloc();
RTMP_Init(m_pRtmp);
/設置URL/
if (RTMP_SetupURL(m_pRtmp,(char*)url) == FALSE)
{
RTMP_Free(m_pRtmp);
return false;
}
/設置可寫,即發佈流,這個函數必須在連接前使用,否則無效/
RTMP_EnableWrite(m_pRtmp);
/連接服務器/
if (RTMP_Connect(m_pRtmp, NULL) == FALSE)
{
RTMP_Free(m_pRtmp);
return false;
}
/連接流/
if (RTMP_ConnectStream(m_pRtmp,0) == FALSE)
{
RTMP_Close(m_pRtmp);
RTMP_Free(m_pRtmp);
return false;
}
return true;
}
/**
* 斷開連接，釋放相關的資源。
*
*/
void RTMP264_Close()
{
if(m_pRtmp)
{
RTMP_Close(m_pRtmp);
RTMP_Free(m_pRtmp);
m_pRtmp = NULL;
}
if (m_pFileBuf != NULL)
{
free(m_pFileBuf);
}
if (m_pFileBuf_tmp != NULL)
{
free(m_pFileBuf_tmp);
}
}
/**
* 發送RTMP數據包
*
* @param nPacketType 數據類型
* @param data 存儲數據內容
* @param size 數據大小
* @param nTimestamp 當前包的時間戳
*
* @成功則返回 1 , 失敗則返回一個小於0的數
*/
int SendPacket(unsigned int nPacketType,unsigned char data,unsigned int size,unsigned int nTimestamp)
{
if(m_pRtmp == NULL) return -1;
RTMPPacket packet;
/分配包內存和初始化,len爲包體長度/
packet = (RTMPPacket *)m_pBuff;
/包體內存/
packet->m_body = (char *)packet + RTMP_HEAD_SIZE;
packet->m_nBodySize = size;
//memcpy(packet->m_body,data,size);
packet->m_hasAbsTimestamp = 0;
packet->m_packetType = nPacketType; /此處爲類型有兩種一種是音頻,一種是視頻/
packet->m_nInfoField2 = m_pRtmp->m_stream_id;
packet->m_nChannel = 0x04;
packet->m_headerType = RTMP_PACKET_SIZE_LARGE;
if (RTMP_PACKET_TYPE_AUDIO ==nPacketType && size !=4)
{
packet->m_headerType = RTMP_PACKET_SIZE_MEDIUM;
}
packet->m_nTimeStamp = nTimestamp;
/發送/
int nRet =0;
if (RTMP_IsConnected(m_pRtmp))
{
nRet = RTMP_SendPacket(m_pRtmp,packet,TRUE); /TRUE爲放進發送隊列,FALSE是不放進發送隊列,直接發送/
}
return nRet;
}
/**
* 發送視頻的sps和pps信息
*
* @param pps 存儲視頻的pps信息
* @param pps_len 視頻的pps信息長度
* @param sps 存儲視頻的pps信息
* @param sps_len 視頻的sps信息長度
*
* @成功則返回 1 , 失敗則返回0
*/
int SendVideoSpsPps(unsigned char *pps,int pps_len,unsigned char * sps,int sps_len)
{
//dumpdata(pps, pps_len, "pps: ");
//dumpdata(sps, sps_len, "sps: ");
if(m_pRtmp == NULL)
{
return 0;
}
RTMPPacket * packet=NULL;//rtmp包結構
unsigned char * body=NULL;
int i;
packet = (RTMPPacket *)malloc(RTMP_HEAD_SIZE+1024);
//RTMPPacket_Reset(packet);//重置packet狀態
memset(packet,0,RTMP_HEAD_SIZE+1024);
packet->m_body = (char *)packet + RTMP_HEAD_SIZE;
body = (unsigned char *)packet->m_body;
i = 0;
body[i++] = 0x17;
body[i++] = 0x00;
body[i++] = 0x00;
body[i++] = 0x00;
body[i++] = 0x00;
/AVCDecoderConfigurationRecord/
body[i++] = 0x01;
body[i++] = sps[1];
body[i++] = sps[2];
body[i++] = sps[3];
body[i++] = 0xff;
/sps/
body[i++] = 0xe1;
body[i++] = (sps_len >> 8) & 0xff;
body[i++] = sps_len & 0xff;
memcpy(&body[i],sps,sps_len);
i += sps_len;
/pps/
body[i++] = 0x01;
body[i++] = (pps_len >> 8) & 0xff;
body[i++] = (pps_len) & 0xff;
memcpy(&body[i],pps,pps_len);
i += pps_len;
packet->m_packetType = RTMP_PACKET_TYPE_VIDEO;
packet->m_nBodySize = i;
packet->m_nChannel = 0x04;
packet->m_nTimeStamp = 0;
packet->m_hasAbsTimestamp = 0;
packet->m_headerType = RTMP_PACKET_SIZE_MEDIUM;
packet->m_nInfoField2 = m_pRtmp->m_stream_id;
/調用發送接口/
int nRet = 0;
if (RTMP_IsConnected(m_pRtmp))
{
nRet = RTMP_SendPacket(m_pRtmp,packet,TRUE);
}
free(packet); //釋放內存
return nRet;
}
/**
* 發送H264數據幀
*
* @param data 存儲數據幀內容
* @param size 數據幀的大小
* @param bIsKeyFrame 記錄該幀是否爲關鍵幀
* @param nTimeStamp 當前幀的時間戳
*
* @成功則返回 1 , 失敗則返回0
*/
int SendH264Packet(unsigned char *data,unsigned int size,int bIsKeyFrame,unsigned int nTimeStamp)
{
if(data == NULL && size<11){
return false;
}
unsigned char body = (unsigned char)(m_pBuff+RTMP_HEAD_SIZE);
int i = 0;
if(bIsKeyFrame){
body[i++] = 0x17;// 1:Iframe 7:AVC
body[i++] = 0x01;// AVC NALU
body[i++] = 0x00;
body[i++] = 0x00;
body[i++] = 0x00;
// NALU size
body[i++] = size>>24 &0xff;
body[i++] = size>>16 &0xff;
body[i++] = size>>8 &0xff;
body[i++] = size&0xff;
// NALU data
memcpy(&body[i],data,size);
SendVideoSpsPps(g_metaData.Pps,g_metaData.nPpsLen,g_metaData.Sps,g_metaData.nSpsLen);
}else{
body[i++] = 0x27;// 2:Pframe 7:AVC
body[i++] = 0x01;// AVC NALU
body[i++] = 0x00;
body[i++] = 0x00;
body[i++] = 0x00;
// NALU size
body[i++] = size>>24 &0xff;
body[i++] = size>>16 &0xff;
body[i++] = size>>8 &0xff;
body[i++] = size&0xff;
// NALU data
memcpy(&body[i],data,size);
}
int bRet = SendPacket(RTMP_PACKET_TYPE_VIDEO,body,i+size,nTimeStamp);
return bRet;
}
/**
* 從內存中讀取出第一個Nal單元
*
* @param nalu 存儲nalu數據
* @param read_buffer 回調函數，當數據不足的時候，系統會自動調用該函數獲取輸入數據。
* 2個參數功能：
* uint8_t *buf：外部數據送至該地址
* int buf_size：外部數據大小
* 返回值：成功讀取的內存大小
* @成功則返回 1 , 失敗則返回0
*/
int ReadFirstNaluFromBuf(NaluUnit *nalu,int (*read_buffer)(uint8_t *buf, int buf_size))
{
int naltail_pos=nalhead_pos;
memset(m_pFileBuf_tmp,0,BUFFER_SIZE);
while(nalhead_pos<m_nFileBufSize)
{
//search for nal header
if(m_pFileBuf[nalhead_pos++] == 0x00 &&
m_pFileBuf[nalhead_pos++] == 0x00)
{
if(m_pFileBuf[nalhead_pos++] == 0x01)
goto gotnal_head;
else
{
//cuz we have done an i++ before,so we need to roll back now
nalhead_pos–;
if(m_pFileBuf[nalhead_pos++] == 0x00 &&
m_pFileBuf[nalhead_pos++] == 0x01)
goto gotnal_head;
else
continue;
}
}
else
continue;
//search for nal tail which is also the head of next nal
gotnal_head:
//normal case:the whole nal is in this m_pFileBuf
naltail_pos = nalhead_pos;
while (naltail_pos<m_nFileBufSize)
{
if(m_pFileBuf[naltail_pos++] == 0x00 &&
m_pFileBuf[naltail_pos++] == 0x00 )
{
if(m_pFileBuf[naltail_pos++] == 0x01)
{
nalu->size = (naltail_pos-3)-nalhead_pos;
break;
}
else
{
naltail_pos–;
if(m_pFileBuf[naltail_pos++] == 0x00 &&
m_pFileBuf[naltail_pos++] == 0x01)
{
nalu->size = (naltail_pos-4)-nalhead_pos;
break;
}
}
}
}
nalu->type = m_pFileBuf[nalhead_pos]&0x1f;
memcpy(m_pFileBuf_tmp,m_pFileBuf+nalhead_pos,nalu->size);
nalu->data=m_pFileBuf_tmp;
nalhead_pos=naltail_pos;
return TRUE;
}
}
/**
* 從內存中讀取出一個Nal單元
*
* @param nalu 存儲nalu數據
* @param read_buffer 回調函數，當數據不足的時候，系統會自動調用該函數獲取輸入數據。
* 2個參數功能：
* uint8_t *buf：外部數據送至該地址
* int buf_size：外部數據大小
* 返回值：成功讀取的內存大小
* @成功則返回 1 , 失敗則返回0
*/
int ReadOneNaluFromBuf(NaluUnit *nalu,int (*read_buffer)(uint8_t *buf, int buf_size))
{
int naltail_pos=nalhead_pos;
int ret;
int nalustart;//nal的開始標識符是幾個00
memset(m_pFileBuf_tmp,0,BUFFER_SIZE);
nalu->size=0;
while(1)
{
if(nalhead_pos==NO_MORE_BUFFER_TO_READ)
return FALSE;
while(naltail_pos<m_nFileBufSize)
{
//search for nal tail
if(m_pFileBuf[naltail_pos++] == 0x00 &&
m_pFileBuf[naltail_pos++] == 0x00)
{
if(m_pFileBuf[naltail_pos++] == 0x01)
{
nalustart=3;
goto gotnal ;
}
else
{
//cuz we have done an i++ before,so we need to roll back now
naltail_pos–;
if(m_pFileBuf[naltail_pos++] == 0x00 &&
m_pFileBuf[naltail_pos++] == 0x01)
{
nalustart=4;
goto gotnal;
}
else
continue;
}
}
else
continue;
gotnal:
/**
*special case1:parts of the nal lies in a m_pFileBuf and we have to read from buffer
*again to get the rest part of this nal
/
if(nalhead_posGOT_A_NAL_CROSS_BUFFER || nalhead_posGOT_A_NAL_INCLUDE_A_BUFFER)
{
nalu->size = nalu->size+naltail_pos-nalustart;
if(nalu->size>BUFFER_SIZE)
{
m_pFileBuf_tmp_old=m_pFileBuf_tmp; //// save pointer in case realloc fails
if((m_pFileBuf_tmp = (unsigned char)realloc(m_pFileBuf_tmp,nalu->size)) == NULL )
{
free( m_pFileBuf_tmp_old ); // free original block
return FALSE;
}
}
memcpy(m_pFileBuf_tmp+nalu->size+nalustart-naltail_pos,m_pFileBuf,naltail_pos-nalustart);
nalu->data=m_pFileBuf_tmp;
nalhead_pos=naltail_pos;
return TRUE;
}
//normal case:the whole nal is in this m_pFileBuf
else
{
nalu->type = m_pFileBuf[nalhead_pos]&0x1f;
nalu->size=naltail_pos-nalhead_pos-nalustart;
if(nalu->type==0x06)
{
nalhead_pos=naltail_pos;
continue;
}
memcpy(m_pFileBuf_tmp,m_pFileBuf+nalhead_pos,nalu->size);
nalu->data=m_pFileBuf_tmp;
nalhead_pos=naltail_pos;
return TRUE;
}
}
if(naltail_pos>=m_nFileBufSize && nalhead_pos!=GOT_A_NAL_CROSS_BUFFER && nalhead_pos != GOT_A_NAL_INCLUDE_A_BUFFER)
{
nalu->size = BUFFER_SIZE-nalhead_pos;
nalu->type = m_pFileBuf[nalhead_pos]&0x1f;
memcpy(m_pFileBuf_tmp,m_pFileBuf+nalhead_pos,nalu->size);
if((ret=read_buffer(m_pFileBuf,m_nFileBufSize))<BUFFER_SIZE)
{
memcpy(m_pFileBuf_tmp+nalu->size,m_pFileBuf,ret);
nalu->size=nalu->size+ret;
nalu->data=m_pFileBuf_tmp;
nalhead_pos=NO_MORE_BUFFER_TO_READ;
return FALSE;
}
naltail_pos=0;
nalhead_pos=GOT_A_NAL_CROSS_BUFFER;
continue;
}
if(nalhead_pos==GOT_A_NAL_CROSS_BUFFER || nalhead_pos == GOT_A_NAL_INCLUDE_A_BUFFER)
{
nalu->size = BUFFER_SIZE+nalu->size;
m_pFileBuf_tmp_old=m_pFileBuf_tmp; //// save pointer in case realloc fails
if((m_pFileBuf_tmp = (unsigned char*)realloc(m_pFileBuf_tmp,nalu->size)) == NULL )
{
free( m_pFileBuf_tmp_old ); // free original block
return FALSE;
}
memcpy(m_pFileBuf_tmp+nalu->size-BUFFER_SIZE,m_pFileBuf,BUFFER_SIZE);
if((ret=read_buffer(m_pFileBuf,m_nFileBufSize))<BUFFER_SIZE)
{
memcpy(m_pFileBuf_tmp+nalu->size,m_pFileBuf,ret);
nalu->size=nalu->size+ret;
nalu->data=m_pFileBuf_tmp;
nalhead_pos=NO_MORE_BUFFER_TO_READ;
return FALSE;
}
naltail_pos=0;
nalhead_pos=GOT_A_NAL_INCLUDE_A_BUFFER;
continue;
}
}
return FALSE;
}
/**
* 將內存中的一段H.264編碼的視頻數據利用RTMP協議發送到服務器
*
* @param read_buffer 回調函數，當數據不足的時候，系統會自動調用該函數獲取輸入數據。
* 2個參數功能：
* uint8_t *buf：外部數據送至該地址
* int buf_size：外部數據大小
* 返回值：成功讀取的內存大小
* @成功則返回1 , 失敗則返回0
*/
int RTMP264_Send(int (*read_buffer)(unsigned char *buf, int buf_size))
{
int ret;
uint32_t now,last_update;
memset(&g_metaData,0,sizeof(RTMPMetadata));
memset(m_pFileBuf,0,BUFFER_SIZE);
if((ret=read_buffer(m_pFileBuf,m_nFileBufSize))<0)
{
return FALSE;
}
NaluUnit naluUnit;
// 讀取SPS幀
ReadFirstNaluFromBuf(&naluUnit,read_buffer);
g_metaData.nSpsLen = naluUnit.size;
g_metaData.Sps=(unsigned char*)malloc(naluUnit.size);
memcpy(g_metaData.Sps,naluUnit.data,naluUnit.size);
dumpdata(g_metaData.Sps, g_metaData.nSpsLen, "SPS: ");
// 讀取PPS幀
ReadOneNaluFromBuf(&naluUnit,read_buffer);
g_metaData.nPpsLen = naluUnit.size;
g_metaData.Pps=(unsigned char*)malloc(naluUnit.size);
memcpy(g_metaData.Pps,naluUnit.data,naluUnit.size);
dumpdata(g_metaData.Pps, g_metaData.nPpsLen, "PPS: ");
// 解碼SPS,獲取視頻圖像寬、高信息
int width = 0,height = 0, fps=0;
h264_decode_sps(g_metaData.Sps,g_metaData.nSpsLen,&width,&height,&fps);
printf(“00width:%d,height:%d, fps:%d\n”, width, height, fps);
//g_metaData.nWidth = width;
//g_metaData.nHeight = height;
if(fps)
g_metaData.nFrameRate = fps;
else
g_metaData.nFrameRate = 30;
printf(“width:%d,height:%d, fps:%d\n”, width, height, fps);
//發送PPS,SPS
//ret=SendVideoSpsPps(g_metaData.Pps,g_metaData.nPpsLen,g_metaData.Sps,g_metaData.nSpsLen);
//if(ret!=1)
// return FALSE;
unsigned int tick = 0;
unsigned int tick_gap = 1000/g_metaData.nFrameRate;
ReadOneNaluFromBuf(&naluUnit,read_buffer);
int bKeyframe = (naluUnit.type == 0x05) ? TRUE : FALSE;
while(SendH264Packet(naluUnit.data,naluUnit.size,bKeyframe,tick))
{
got_sps_pps:
if(!ReadOneNaluFromBuf(&naluUnit,read_buffer))
goto end;
if(naluUnit.type == 0x07 || naluUnit.type == 0x08)
goto got_sps_pps;
bKeyframe = (naluUnit.type == 0x05) ? TRUE : FALSE;
tick +=tick_gap;
//msleep(tick_gap-now+last_update);
sleep(40);
}
end:
free(g_metaData.Sps);
free(g_metaData.Pps);
return TRUE;
}
//解析硬編碼 NX_VidEncGetSeqInfo 中的SPS和PPS
int decode_sps_pps(RTMPMetadata* pMeta,unsigned char * buff, int size)
{
dumpdata(buff, size, "SEQ of H264: ");
pMeta->nSpsLen = 9;
pMeta->Sps=(unsigned char*)malloc(pMeta->nSpsLen);
memcpy(pMeta->Sps,buff+4, pMeta->nSpsLen);
dumpdata(pMeta->Sps, pMeta->nSpsLen, "SPS: ");
pMeta->nPpsLen = 4;
pMeta->Pps=(unsigned char*)malloc(4);
memcpy(pMeta->Pps,buff+17,4);
dumpdata(pMeta->Pps, pMeta->nPpsLen, "PPS: ");
return 0;
}
FILE *fp_send1;
//讀文件的回調函數
//we use this callback function to read data from buffer
int read_buffer1(unsigned char *buf, int buf_size ){
if(!feof(fp_send1)){
int true_size=fread(buf,1,buf_size,fp_send1);
return true_size;
}else{
return -1;
}
}
void version()
{
fprintf(stdout, “V1.0\n”);
}
void usage(char* app)
{
fprintf(stdout, “\t-i input device name:/dev/video0\n”);
fprintf(stdout, “\t-y record YUV file name : out.yuv \n”);
fprintf(stdout, “\t-r record H.264 file name: out.h264\n”);
fprintf(stdout, “\t-u url of rtmp: rtmp://192.168.1.102:1935/hls/cam1\n”);
fprintf(stdout, “\t-v show version.\n”);
fprintf(stdout, “\t-h show help.\n”);
fprintf(stdout, “for examples:\t-i /dev/video10 -u rtmp://192.168.1.6/hls/cam1\n”);
fprintf(stdout, “\t\t-i /dev/video10 -y 1.yuv\n”);
fprintf(stdout, “\t\t-i /dev/video10 -r 1.h264\n”);
}
void my_exit(int s){
g_nStop = 1;
}
int main(int argc, char* argv[])
{
g_nStop = 0;
struct sigaction sigIntHandler;
sigIntHandler.sa_handler = my_exit;
sigemptyset(&sigIntHandler.sa_mask);
sigIntHandler.sa_flags = 0;
sigaction(SIGINT, &sigIntHandler, NULL);
FILE *fp_h264 = NULL;
FILE *fp_yuv = NULL;
char input_name[MAX_FILE_NAME+1] = {0};
char yuv_name[MAX_FILE_NAME+1] = {0};
char h264_name[MAX_FILE_NAME+1] = {0};
char rtmp_url[MAX_FILE_NAME+1] = {0};
char video_size[20] = {0};
strcpy(video_size, “320x240”);
int bit_rate = 200; //kbit
int opt;
while( (opt = getopt(argc,argv,“hvi:y:r:u:s🅱️”)) != -1 ) //解析結束時，返回-1
{
switch(opt)
{
case ‘b’:
bit_rate = atol(optarg);
break;
case ‘h’:
usage(argv[0]);
return 0;
case ‘v’:
version();
return 0;
case ‘i’:
strncpy(input_name, optarg, MAX_FILE_NAME);
break;
case ‘y’:
strncpy(yuv_name, optarg, MAX_FILE_NAME);
fp_yuv = fopen(yuv_name, “wb+”);
break;
case ‘r’:
strncpy(h264_name, optarg, MAX_FILE_NAME);
fp_h264 = fopen(h264_name, “wb+”);
break;
case ‘u’:
strncpy(rtmp_url, optarg, MAX_FILE_NAME);
break;
case ‘s’:
strncpy(video_size, optarg, 20);
break;
}
}
int ret = 0;
av_register_all();
avcodec_register_all();
avformat_network_init();
avdevice_register_all();
if(strlen(rtmp_url)>0)
{
ret = RTMP264_Connect(rtmp_url);
if(!ret)
{
printf(“RTMP264_Connect fail! %s\n”, rtmp_url);
return -1;
}
}
if(strstr(input_name, “.h264”)!=NULL)
{
fp_send1 = fopen(input_name, “rb”);
RTMP264_Send(read_buffer1);
return 0;
}
int videoindex = -1;
AVFormatContext *ifmt_ctx = NULL;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVInputFormat *ifmt = NULL; //輸入
AVDictionary *format_opts;
av_dict_set(&format_opts,“video_size”, video_size, 0);
ifmt_ctx = avformat_alloc_context();
ifmt = av_find_input_format(“video4linux2”);
if(ifmt == NULL)
{
printf(“Couldn’t find video4linux2.\n”);
}
if(avformat_open_input(&ifmt_ctx, input_name, ifmt, &format_opts) != 0)
{
printf(“Couldn’t open input stream.\n”);
return -1;
}
if(avformat_find_stream_info(ifmt_ctx, NULL) <0)
{
printf(“Couldn’t find stream information.\n”);
return -1;
}
int i;
printf(“stream count=%d .\n”, ifmt_ctx->nb_streams);
for(i=0; i<ifmt_ctx->nb_streams; i++)
{
if(ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
{
printf(“codec_type:%d\n”, ifmt_ctx->streams[i]->codec->codec_type);
videoindex=i;
//break;
}
}
if(videoindex == -1)
{
printf(“Couldn’t find a video stream.\n”);
return -1;
}
pCodecCtx = ifmt_ctx->streams[videoindex]->codec;
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL)
{
printf(“Codec not found.（沒有找到解碼器）\n”);
return -1;
}
if(avcodec_open2(pCodecCtx, pCodec,NULL)<0)
{
printf(“Could not open codec.（無法打開解碼器）\n”);
return -1;
}
int inWidth, inHeight; // Clipper Output Information
int frameCnt = 0;
// Encoder Parameters
NX_VID_ENC_INIT_PARAM encInitParam;
unsigned char *seqBuffer = (unsigned char *)malloc( MAX_SEQ_BUF_SIZE );
NX_VID_ENC_HANDLE hEnc;
NX_VID_ENC_IN encIn;
NX_VID_ENC_OUT encOut;
long long totalSize = 0;
double bitRate = 0.;
long long vipTimeStamp;
int instanceIdx;
// Set Image & Clipper Information
inWidth = pCodecCtx->width;
inHeight = pCodecCtx->height;
fprintf(stdout, “inWidth=%d, inHeight=%d\n”, inWidth, inHeight);
// Initialize Encoder
hEnc = NX_VidEncOpen( NX_AVC_ENC, &instanceIdx);
memset( &encInitParam, 0, sizeof(encInitParam) );
encInitParam.width = inWidth;
encInitParam.height = inHeight;
encInitParam.gopSize = 30/2;
encInitParam.bitrate = bit_rate*1024;
encInitParam.fpsNum = 30;
encInitParam.fpsDen = 1;
encInitParam.chromaInterleave = 0;
// Rate Control
encInitParam.enableRC = 1; // Enable Rate Control
encInitParam.disableSkip = 0; // Enable Skip
encInitParam.maximumQp = 51; // Max Qunatization Scale
encInitParam.initialQp = 10; // Default Encoder API ( enableRC == 0 )
encInitParam.enableAUDelimiter = 1; // Enable / Disable AU Delimiter
NX_VID_MEMORY_INFO *hInImage = NULL;
hInImage = NX_VideoAllocateMemory( 16, inWidth, inHeight, NX_MEM_MAP_LINEAR, FOURCC_MVS0 );
ret = NX_VidEncInit( hEnc, &encInitParam );
if(ret != 0)
{
printf(“NX_VidEncInit=%d\n”, ret);
goto end;
}
int size;
NX_VidEncGetSeqInfo( hEnc, seqBuffer, &size ); //SPS + PPS
/*
00000001 6742401e a680a03d 90000000 0168ce38 80
SPS: 9字節 67 42 40 1e a6 80 a0 3d 90
PPS: 4字節 68 ce 38 80
*/
if(fp_h264 != NULL) fwrite( seqBuffer, 1, size, fp_h264 );
ret = decode_sps_pps(&g_metaData, seqBuffer, size);
ret=SendVideoSpsPps(g_metaData.Pps,g_metaData.nPpsLen,g_metaData.Sps,g_metaData.nSpsLen);
AVFrame *pFrame,*pFrameYUV;
pFrame=avcodec_alloc_frame();
pFrameYUV=avcodec_alloc_frame();
uint8_t *out_buffer=(uint8_t *)av_malloc(avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
AVPacket *packet=(AVPacket *)av_malloc(sizeof(AVPacket));
printf(“File Information---------------------\n”);
av_dump_format(ifmt_ctx,0,NULL,0);
printf("-------------------------------------------------\n");
struct SwsContext *img_convert_ctx;
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
int got_picture;
AVPacket packetOut;
unsigned int tick = 0;
unsigned int tick_gap = 30;
while(!g_nStop && av_read_frame(ifmt_ctx, packet)>=0){
if(packet->stream_index == videoindex){
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if(ret <0)
{
printf(“Decode Error.\n”);
}
if(got_picture)
{
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
int y_size = pCodecCtx->widthpCodecCtx->height;
if(fp_yuv != NULL)
{
fwrite(pFrameYUV->data[0],1, y_size, fp_yuv); //Y
fwrite(pFrameYUV->data[1],1, y_size/4, fp_yuv); //U
fwrite(pFrameYUV->data[2],1, y_size/4, fp_yuv); //V
}
memcpy((unsigned char)hInImage->luVirAddr, pFrameYUV->data[0], y_size);
memcpy((unsigned char*)hInImage->cbVirAddr, pFrameYUV->data[1], y_size/4);
memcpy((unsigned char*)hInImage->crVirAddr, pFrameYUV->data[2], y_size/4);
encIn.pImage = hInImage;
encIn.timeStamp = packet->pts;
encIn.forcedIFrame = 0;
encIn.forcedSkipFrame = 0;
encIn.quantParam = 25;
NX_VidEncEncodeFrame( hEnc, &encIn, &encOut );
if(encOut.bufSize>0 )
{
/發送/
//ret = SendH264Packet(encOut.outBuf, encOut.bufSize, encOut.frameType == PIC_TYPE_I, packet->pts);
ret = SendH264Packet(encOut.outBuf,encOut.bufSize, encOut.frameType == PIC_TYPE_I, tick);
tick +=tick_gap;
//printf(“encOut.frameType:%d, encOut.bufSize:%ld\n”, encOut.frameType, encOut.bufSize);
if(fp_h264 != NULL) fwrite( encOut.outBuf, 1, encOut.bufSize, fp_h264 );
//dumpdata( encOut.outBuf, 16, “” );
totalSize += encOut.bufSize;
bitRate = (double)totalSize/(double)frameCnt*.8;
//printf(“bitRate = %4.3f kbps\n”, bitRate*30/1024.);
}
frameCnt ++;
}
}
av_free_packet(packet);
}
if( hInImage != NULL )
{
NX_FreeVideoMemory( hInImage );
}
sws_freeContext(img_convert_ctx);
if(fp_yuv != NULL) fclose(fp_yuv);
if(fp_h264 != NULL) fclose(fp_h264);
end:
free(g_metaData.Sps);
free(g_metaData.Pps);
NX_VidEncClose( hEnc );
av_free(out_buffer);
av_free(pFrameYUV);
avcodec_close(pCodecCtx);
avformat_close_input(&ifmt_ctx);
return 0;
}
————————————————
版權聲明：本文爲CSDN博主「qiek」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qiek/article/details/50974805