#include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <errno.h> #include <fcntl.h> #include <signal.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <linux/videodev.h> #include "xvid.h" #define FRAMERATE_INCR 1001 #define SMALL_EPS (1e-10) #define VIDEO "/dev/video" #define INDEX 0 #define IOCTL(fd, req, addr ) \ ((-1==ioctl(fd,req,addr))?(perror(#req),close(fd),exit(EXIT_FAILURE)):0) static float ARG_FRAMERATE = 25.00f; static int ARG_QUALITY = 4; static int ARG_MAXKEYINTERVAL = 250; static char * ARG_OUTPUTFILE= "out.m4u"; static FILE * fp = NULL; static int done = 0; static const int motion_presets[] = { /* quality 0 */ 0, /* quality 1 */ XVID_ME_ADVANCEDDIAMOND16, /* quality 2 */ XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16, /* quality 3 */ XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 | XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8, /* quality 4 */ XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 | XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 | XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP, /* quality 5 */ XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 | XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 | XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP, /* quality 6 */ XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 | XVID_ME_EXTSEARCH16 | XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 | XVID_ME_EXTSEARCH8 | XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP, }; static const int vop_presets[] = { /* quality 0 */ 0, /* quality 1 */ 0, /* quality 2 */ XVID_VOP_HALFPEL, /* quality 3 */ XVID_VOP_HALFPEL | XVID_VOP_INTER4V, /* quality 4 */ XVID_VOP_HALFPEL | XVID_VOP_INTER4V, /* quality 5 */ XVID_VOP_HALFPEL | XVID_VOP_INTER4V | XVID_VOP_TRELLISQUANT, /* quality 6 */ XVID_VOP_HALFPEL | XVID_VOP_INTER4V | XVID_VOP_TRELLISQUANT | XVID_VOP_HQACPRED, }; static int XDIM=352,YDIM=288; static use_assembler = 0; static void *enc_handle = NULL; static int enc_init(int use_assembler); static int enc_main(unsigned char *image, unsigned char *bitstream, int *key, int *stats_type, int *stats_quant, int *stats_length, int stats[3]); static int enc_stop(); //signal act method defination static void clean(int signum) { done=1; } int main(int argc,char *argv[]) { //register SIGINT action method ,to save the m4u file signal(SIGINT,clean); int fd; struct v4l2_capability cap; struct v4l2_format format; struct v4l2_requestbuffers reqbuf; struct v4l2_buffer buffer; struct v4l2_input input; int index=0,i; for (i=1; i< argc; i++) { if (strcmp("-asm", argv[i]) == 0 ) { use_assembler = 1; }else if(strcmp("-f", argv[i]) == 0 && i < argc -1){ i++; ARG_OUTPUTFILE = argv[i]; }else if(strcmp("-i", argv[i]) == 0 && i < argc -1){ i++; index = atoi(argv[i]); } else if(strcmp("-w", argv[i]) == 0 && i < argc -1){ i++; XDIM = atoi(argv[i]); } else if(strcmp("-h", argv[i]) == 0 && i < argc -1){ i++; YDIM = atoi(argv[i]); } } //init capture card fd = open(VIDEO,O_RDWR); if(fd<0) { perror("Can't open /dev/video device"); exit(errno); } //if card can't support video capture and by means of steamio,exit IOCTL(fd, VIDIOC_QUERYCAP, &cap); if ( !(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) &&!(cap.capabilities & V4L2_CAP_STREAMING)) { fprintf(stderr, "Couldn't use the card \n"); exit(3); } //query input and select the desired input IOCTL(fd, VIDIOC_G_INPUT, &index); input.index = index; IOCTL(fd, VIDIOC_ENUMINPUT, &input); printf ("Current input: Index %i,Name %s\n", index,input.name); for(i=0;;i++) { if(i!=index) { input.index = i; if(-1==ioctl(fd, VIDIOC_ENUMINPUT, &input)) break; else printf ("Other input: Index %i,Name %s\n",i,input.name); } } IOCTL(fd, VIDIOC_S_INPUT, &index); //get current video format,set the desired format format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; IOCTL(fd,VIDIOC_G_FMT,&format); format.fmt.pix.width = XDIM; format.fmt.pix.height = YDIM; format.fmt.pix.pixelformat = V4L2_PIX_FMT_YVU420; format.fmt.pix.field = V4L2_FIELD_ANY;//V4L2_FIELD_INTERLACED IOCTL(fd,VIDIOC_S_FMT,&format); XDIM = format.fmt.pix.width; printf("Gotten width %d\n",XDIM); YDIM = format.fmt.pix.height; printf("Gotten height %d\n",YDIM); //let driver get the buffers reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; reqbuf.memory = V4L2_MEMORY_MMAP; reqbuf.count = 4; IOCTL(fd,VIDIOC_REQBUFS,&reqbuf ); if (reqbuf.count < 4) { printf ("Not enough buffer memory for driver\n"); exit (5); } //mmap the driver's buffer to application address //create relative buffers struct to be used by mmap struct { void * start; size_t length; } buffers[reqbuf.count]; //mmap the driver's kernel buffer into application for (i=0;i<reqbuf.count;i++) { buffer.type = reqbuf.type; buffer.index =i ; //query the status of one buffer ,mmap the driver buffer IOCTL(fd,VIDIOC_QUERYBUF,&buffer); buffers[i].length = buffer.length; buffers[i].start = mmap (NULL,buffer.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd,buffer.m.offset); if (buffers[i].start == MAP_FAILED) { close(fd); perror ("mmap"); exit(errno); } } //begin video capture IOCTL(fd,VIDIOC_STREAMON,&reqbuf.type); //enqueue all driver buffers for (i=0;i<reqbuf.count;i++) { buffer.type = reqbuf.type; buffer.index = i; IOCTL(fd,VIDIOC_QUERYBUF, &buffer); IOCTL(fd,VIDIOC_QBUF,&buffer); } //init xvid int result; result = enc_init(1); if(result!=0) { fprintf(stderr, "Encore INIT problem, return value %d\n", result); goto clean_all; } //get mem of mpg4 frame uint8_t *mp4_buffer = NULL; mp4_buffer = (unsigned char *) malloc(XDIM*YDIM); if (mp4_buffer==NULL) { fprintf(stderr,"malloc error"); goto clean_all; } int key; int stats_type; int stats_quant; int stats_length; int sse[3]; //create store mp4 file fp= fopen(ARG_OUTPUTFILE, "rb"); if (fp== NULL) { perror("Error opening output file."); exit(-1); } //main loop ,frame capture,compressed i = 0; int outbytes,m4v_size; while(!done) { //dequeue one frame buffer.type = reqbuf.type; buffer.index = i; IOCTL(fd, VIDIOC_QUERYBUF, &buffer); IOCTL(fd, VIDIOC_DQBUF, &buffer); /*debug info printf("current frame's unix time seconds :%d\n",buffer.timestamp.tv_sec); printf("current frame's unix time mcicoseconds :%d\n",buffer.timestamp.tv_usec); */ //compress a frame m4v_size = enc_main((uint8_t *)buffers[i].start, mp4_buffer+16, &key, &stats_type,&stats_quant, &stats_length, sse); //store into output file outbytes = fwrite(mp4_buffer, 1, m4v_size, fp); if(outbytes != m4v_size) { fprintf(stderr,"Error writing the m4u file\n"); exit(7); } //enqueue one frame buffer.type = reqbuf.type; buffer.index = i; IOCTL(fd, VIDIOC_QUERYBUF, &buffer ); IOCTL(fd, VIDIOC_QBUF, &buffer ); i++; if( i >= reqbuf.count ) i = 0; } clean_all: fclose(fp); enc_stop(); //stop capture IOCTL(fd, VIDIOC_STREAMOFF, &reqbuf.type ); //unmmap the apllication buffer for (i=0;i<reqbuf.count;i++) munmap (buffers[i].start,buffers[i].length); //release the dynamic mem close(fd); return 0; } int enc_init(int use_assembler) { int xerr; //xvid_plugin_cbr_t cbr; xvid_plugin_single_t single; xvid_plugin_2pass1_t rc2pass1; xvid_plugin_2pass2_t rc2pass2; //xvid_plugin_fixed_t rcfixed; xvid_enc_plugin_t plugins[7]; xvid_gbl_init_t xvid_gbl_init; xvid_enc_create_t xvid_enc_create; /*------------------------------------------------------------------------ * XviD core initialization *----------------------------------------------------------------------*/ /* Set version -- version checking will done by xvidcore */ memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init)); xvid_gbl_init.version = XVID_VERSION; xvid_gbl_init.debug = 0; /* Do we have to enable ASM optimizations ? */ if (use_assembler) { xvid_gbl_init.cpu_flags = 0; } /* Initialize XviD core -- Should be done once per __process__ */ xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL); /*------------------------------------------------------------------------ * XviD encoder initialization *----------------------------------------------------------------------*/ /* Version again */ memset(&xvid_enc_create, 0, sizeof(xvid_enc_create)); xvid_enc_create.version = XVID_VERSION; /* Width and Height of input frames */ xvid_enc_create.width = XDIM; xvid_enc_create.height = YDIM; xvid_enc_create.profile = XVID_PROFILE_S_L3; /* init plugins */ xvid_enc_create.zones = NULL; xvid_enc_create.num_zones = 0; xvid_enc_create.plugins = NULL; xvid_enc_create.num_plugins = 0; /* No fancy thread tests */ xvid_enc_create.num_threads = 0; /* Frame rate - Do some quick float fps = fincr/fbase hack */ if ((ARG_FRAMERATE - (int) ARG_FRAMERATE) < SMALL_EPS) { xvid_enc_create.fincr = 1; xvid_enc_create.fbase = (int) ARG_FRAMERATE; } else { xvid_enc_create.fincr = FRAMERATE_INCR; xvid_enc_create.fbase = (int) (FRAMERATE_INCR * ARG_FRAMERATE); } /* Maximum key frame interval */ if (ARG_MAXKEYINTERVAL > 0) { xvid_enc_create.max_key_interval = ARG_MAXKEYINTERVAL; }else { xvid_enc_create.max_key_interval = (int) ARG_FRAMERATE *10; } /* Bframes settings */ xvid_enc_create.max_bframes = 0; xvid_enc_create.bquant_ratio = 150; xvid_enc_create.bquant_offset = 100; /* Dropping ratio frame -- we don't need that */ xvid_enc_create.frame_drop_ratio = 0; /* Global encoder options */ xvid_enc_create.global = 0; /* I use a small value here, since will not encode whole movies, but short clips */ xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL); /* Retrieve the encoder instance from the structure */ enc_handle = xvid_enc_create.handle; return (xerr); } int enc_main(unsigned char *image, unsigned char *bitstream, int *key, int *stats_type, int *stats_quant, int *stats_length, int sse[3]) { int ret; xvid_enc_frame_t xvid_enc_frame; xvid_enc_stats_t xvid_enc_stats; /* Version for the frame and the stats */ memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame)); xvid_enc_frame.version = XVID_VERSION; memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats)); xvid_enc_stats.version = XVID_VERSION; /* Bind output buffer */ xvid_enc_frame.bitstream = bitstream; xvid_enc_frame.length = -1; /* Initialize input image fields */ if (image) { xvid_enc_frame.input.plane[0] = image; xvid_enc_frame.input.csp = XVID_CSP_I420; xvid_enc_frame.input.stride[0] = XDIM; } else { xvid_enc_frame.input.csp = XVID_CSP_NULL; } /* Set up core's general features */ xvid_enc_frame.vol_flags = 0; /* Set up core's general features */ xvid_enc_frame.vop_flags = vop_presets[ARG_QUALITY]; /* Frame type -- let core decide for us */ xvid_enc_frame.type = XVID_TYPE_AUTO; /* Force the right quantizer -- It is internally managed by RC plugins */ xvid_enc_frame.quant = 3; /* Set up motion estimation flags */ xvid_enc_frame.motion = motion_presets[ARG_QUALITY]; /* We don't use special matrices */ xvid_enc_frame.quant_intra_matrix = NULL; xvid_enc_frame.quant_inter_matrix = NULL; /* Encode the frame */ ret = xvid_encore(enc_handle, XVID_ENC_ENCODE, &xvid_enc_frame, &xvid_enc_stats); *key = (xvid_enc_frame.out_flags & XVID_KEYFRAME); *stats_type = xvid_enc_stats.type; *stats_quant = xvid_enc_stats.quant; *stats_length = xvid_enc_stats.length; sse[0] = xvid_enc_stats.sse_y; sse[1] = xvid_enc_stats.sse_u; sse[2] = xvid_enc_stats.sse_v; return (ret); } int enc_stop() { int xerr; /* Destroy the encoder instance */ xerr = xvid_encore(enc_handle, XVID_ENC_DESTROY, NULL, NULL); return (xerr); }
Linux MPEG4 DVR源代码
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