全部博文(396)
分类: Android平台
2020-08-10 15:25:12
操作系统: ubuntu18.04 64位。
X264版本: x264-snapshot-20181217-2245
博客的下载地址:
参考这里: https://blog.csdn.net/xiaolong1126626497/article/details/104919095
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include "include/x264.h"
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/*摄像头相关的全局变量声明区域*/
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#define UVC_VIDEO_DEVICE "/dev/video0" /*UVC摄像头设备节点*/
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int uvc_video_fd; /*存放摄像头设备节点的文件描述符*/
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unsigned char *video_memaddr_buffer[4]; /*存放的是摄像头映射出来的缓冲区首地址*/
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int Image_Width; /*图像的宽度*/
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int Image_Height; /*图像的高度*/
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/*X264编码器相关的全局变量声明区域*/
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unsigned char *h264_buf=NULL;
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typedef struct
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{
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x264_param_t *param;
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x264_t *handle;
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x264_picture_t *picture; //说明一个视频序列中每帧特点
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x264_nal_t *nal;
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}Encoder;
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Encoder en;
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FILE *h264_fp; /*存放视频的文件*/
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/*函数声明区域*/
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void X264_close_encoder(void); //关闭解码器
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/*
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函数功能: 处理退出的信号
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*/
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void exit_sighandler(int sig)
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{
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/*关闭视频文件*/
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fclose(h264_fp);
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//关闭摄像头
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close(uvc_video_fd);
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//释放缓冲区
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free(h264_buf);
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//退出进程
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exit(1);
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}
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/*设置视频录制相关参数*/
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static int x264_param_apply_preset(x264_param_t *param, const char *preset)
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{
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char *end;
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int i = strtol( preset, &end, 10 );
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if( *end == 0 && i >= 0 && i < sizeof(x264_preset_names)/sizeof(*x264_preset_names)-1 )
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preset = x264_preset_names[i];
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/*快4*/
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if( !strcasecmp( preset, "ultrafast" ) )
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{
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param->i_frame_reference = 1;
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param->i_scenecut_threshold = 0;
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param->b_deblocking_filter = 0;
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param->b_cabac = 0;
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param->i_bframe = 0;
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param->analyse.intra = 0;
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param->analyse.inter = 0;
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param->analyse.b_transform_8x8 = 0;
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param->analyse.i_me_method = X264_ME_DIA;
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param->analyse.i_subpel_refine = 0;
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param->rc.i_aq_mode = 0;
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param->analyse.b_mixed_references = 0;
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param->analyse.i_trellis = 0;
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param->i_bframe_adaptive = X264_B_ADAPT_NONE;
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param->rc.b_mb_tree = 0;
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param->analyse.i_weighted_pred = X264_WEIGHTP_NONE;
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param->analyse.b_weighted_bipred = 0;
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param->rc.i_lookahead = 0;
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}
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/*快3*/
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else if( !strcasecmp( preset, "superfast" ) )
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{
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param->analyse.inter = X264_ANALYSE_I8x8|X264_ANALYSE_I4x4;
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param->analyse.i_me_method = X264_ME_DIA;
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param->analyse.i_subpel_refine = 1;
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param->i_frame_reference = 1;
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param->analyse.b_mixed_references = 0;
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param->analyse.i_trellis = 0;
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param->rc.b_mb_tree = 0;
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param->analyse.i_weighted_pred = X264_WEIGHTP_SIMPLE;
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param->rc.i_lookahead = 0;
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}
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/*快2*/
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else if( !strcasecmp( preset, "veryfast" ) )
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{
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param->analyse.i_me_method = X264_ME_HEX;
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param->analyse.i_subpel_refine = 2;
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param->i_frame_reference = 1;
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param->analyse.b_mixed_references = 0;
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param->analyse.i_trellis = 0;
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param->analyse.i_weighted_pred = X264_WEIGHTP_SIMPLE;
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param->rc.i_lookahead = 10;
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}
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/*快1*/
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else if( !strcasecmp( preset, "faster" ) )
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{
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param->analyse.b_mixed_references = 0;
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param->i_frame_reference = 2;
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param->analyse.i_subpel_refine = 4;
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param->analyse.i_weighted_pred = X264_WEIGHTP_SIMPLE;
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param->rc.i_lookahead = 20;
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}
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/*快速*/
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else if( !strcasecmp( preset, "fast" ) )
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{
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param->i_frame_reference = 2;
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param->analyse.i_subpel_refine = 6;
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param->analyse.i_weighted_pred = X264_WEIGHTP_SIMPLE;
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param->rc.i_lookahead = 30;
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}
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/*中等*/
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else if( !strcasecmp( preset, "medium" ) )
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{
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/* Default is medium */
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}
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/*慢速*/
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else if( !strcasecmp( preset, "slow" ) )
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{
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param->analyse.i_me_method = X264_ME_UMH;
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param->analyse.i_subpel_refine = 8;
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param->i_frame_reference = 5;
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param->i_bframe_adaptive = X264_B_ADAPT_TRELLIS;
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param->analyse.i_direct_mv_pred = X264_DIRECT_PRED_AUTO;
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param->rc.i_lookahead = 50;
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}
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else if( !strcasecmp( preset, "slower" ) )
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{
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param->analyse.i_me_method = X264_ME_UMH;
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param->analyse.i_subpel_refine = 9;
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param->i_frame_reference = 8;
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param->i_bframe_adaptive = X264_B_ADAPT_TRELLIS;
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param->analyse.i_direct_mv_pred = X264_DIRECT_PRED_AUTO;
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param->analyse.inter |= X264_ANALYSE_PSUB8x8;
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param->analyse.i_trellis = 2;
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param->rc.i_lookahead = 60;
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}
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else if( !strcasecmp( preset, "veryslow" ) )
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{
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param->analyse.i_me_method = X264_ME_UMH;
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param->analyse.i_subpel_refine = 10;
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}
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else
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{
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return -1;
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}
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return 0;
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}
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/*开始视频压缩*/
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void compress_begin(Encoder *en, int width, int height)
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{
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en->param = (x264_param_t *) malloc(sizeof(x264_param_t));
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en->picture = (x264_picture_t *) malloc(sizeof(x264_picture_t));
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x264_param_default(en->param); //编码器默认设置
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/*订制编码器压缩的性能*/
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x264_param_apply_preset(en->param,"medium");
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en->param->i_width = width; //设置图像宽度
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en->param->i_height = height; //设置图像高度
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if((en->handle = x264_encoder_open(en->param)) == 0)
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{
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return;
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}
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x264_picture_alloc(en->picture, X264_CSP_I420, en->param->i_width,en->param->i_height);
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en->picture->img.i_csp = X264_CSP_I420;
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en->picture->img.i_plane = 3;
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}
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/*结束压缩*/
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void compress_end(Encoder *en)
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{
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if (en->picture)
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{
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x264_picture_clean(en->picture);
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free(en->picture);
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en->picture = 0;
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}
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if(en->param)
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{
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free(en->param);
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en->param = 0;
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}
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if(en->handle)
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{
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x264_encoder_close(en->handle);
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}
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free(en);
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}
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/*初始化编码器*/
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void X264_init_encoder(int width,int height)
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{
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compress_begin(&en,width,height);
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h264_buf=(uint8_t *)malloc(sizeof(uint8_t)*width*height*3);
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if(h264_buf==NULL)printf("X264缓冲区申请失败!\n");
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}
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/*压缩一帧数据*/
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int compress_frame(Encoder *en, int type, uint8_t *in, uint8_t *out) {
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x264_picture_t pic_out;
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int nNal = 0;
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int result = 0;
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int i = 0 , j = 0 ;
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uint8_t *p_out = out;
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en->nal=NULL;
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uint8_t *p422;
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char *y = en->picture->img.plane[0];
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char *u = en->picture->img.plane[1];
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char *v = en->picture->img.plane[2];
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//////////////////////////////////////////////////////////////////////////////////////
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int widthStep422 = en->param->i_width * 2;
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for(i = 0; i < en->param->i_height; i += 2)
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{
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p422 = in + i * widthStep422;
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for(j = 0; j < widthStep422; j+=4)
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{
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*(y++) = p422[j];
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*(u++) = p422[j+1];
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*(y++) = p422[j+2];
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}
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p422 += widthStep422;
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for(j = 0; j < widthStep422; j+=4)
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{
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*(y++) = p422[j];
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*(v++) = p422[j+3];
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*(y++) = p422[j+2];
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}
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}
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switch (type) {
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case 0:
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en->picture->i_type = X264_TYPE_P;
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break;
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case 1:
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en->picture->i_type = X264_TYPE_IDR;
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break;
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case 2:
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en->picture->i_type = X264_TYPE_I;
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break;
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default:
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en->picture->i_type = X264_TYPE_AUTO;
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break;
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}
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/*开始264编码*/
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if (x264_encoder_encode(en->handle, &(en->nal), &nNal, en->picture,
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&pic_out) < 0) {
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return -1;
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}
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en->picture->i_pts++;
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for (i = 0; i < nNal; i++) {
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memcpy(p_out, en->nal[i].p_payload, en->nal[i].i_payload);
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p_out += en->nal[i].i_payload;
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result += en->nal[i].i_payload;
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}
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return result;
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//return nNal;
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}
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//编码并写入一帧数据
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void encode_frame(uint8_t *yuv_frame)
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{
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int h264_length = 0;
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//压缩一帧数据
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h264_length = compress_frame(&en, -1, yuv_frame, h264_buf);
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if(h264_length > 0)
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{
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printf("h264_length=%d\n",h264_length);
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//写入视频文件
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fwrite(h264_buf, h264_length,1,h264_fp);
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}
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}
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/*
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函数功能: UVC摄像头初始化
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返回值: 0表示成功
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*/
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int UVCvideoInit(void)
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{
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/*1. 打开摄像头设备*/
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uvc_video_fd=open(UVC_VIDEO_DEVICE,O_RDWR);
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if(uvc_video_fd<0)
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{
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printf("%s 摄像头设备打开失败!\n",UVC_VIDEO_DEVICE);
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return -1;
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}
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/*2. 设置摄像头的属性*/
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struct v4l2_format format;
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memset(&format,0,sizeof(struct v4l2_format));
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format.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*表示视频捕获设备*/
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format.fmt.pix.width=320; /*预设的宽度*/
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format.fmt.pix.height=240; /*预设的高度*/
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format.fmt.pix.pixelformat=V4L2_PIX_FMT_YUYV; /*预设的格式*/
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format.fmt.pix.field=V4L2_FIELD_ANY; /*系统自动设置: 帧属性*/
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if(ioctl(uvc_video_fd,VIDIOC_S_FMT,&format)) /*设置摄像头的属性*/
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{
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printf("摄像头格式设置失败!\n");
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return -2;
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}
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Image_Width=format.fmt.pix.width;
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Image_Height=format.fmt.pix.height;
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printf("摄像头实际输出的图像尺寸:x=%d,y=%d\n",format.fmt.pix.width,format.fmt.pix.height);
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if(format.fmt.pix.pixelformat==V4L2_PIX_FMT_YUYV)
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{
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printf("当前摄像头支持YUV格式图像输出!\n");
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}
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else
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{
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printf("当前摄像头不支持YUV格式图像输出!\n");
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return -3;
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}
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/*3. 请求缓冲区: 申请摄像头数据采集的缓冲区*/
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struct v4l2_requestbuffers req_buff;
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memset(&req_buff,0,sizeof(struct v4l2_requestbuffers));
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req_buff.count=4; /*预设要申请4个缓冲区*/
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req_buff.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*视频捕获设备*/
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req_buff.memory=V4L2_MEMORY_MMAP; /*支持mmap内存映射*/
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if(ioctl(uvc_video_fd,VIDIOC_REQBUFS,&req_buff)) /*申请缓冲区*/
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{
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printf("申请摄像头数据采集的缓冲区失败!\n");
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return -4;
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}
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printf("摄像头缓冲区申请的数量: %d\n",req_buff.count);
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/*4. 获取缓冲区的详细信息: 地址,编号*/
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struct v4l2_buffer buff_info;
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memset(&buff_info,0,sizeof(struct v4l2_buffer));
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int i;
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for(i=0;i
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{
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buff_info.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*视频捕获设备*/
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buff_info.memory=V4L2_MEMORY_MMAP; /*支持mmap内存映射*/
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if(ioctl(uvc_video_fd,VIDIOC_QUERYBUF,&buff_info)) /*获取缓冲区的详细信息*/
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{
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printf("获取缓冲区的详细信息失败!\n");
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return -5;
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}
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/*根据摄像头申请缓冲区信息: 使用mmap函数将内核的地址映射到进程空间*/
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video_memaddr_buffer[i]=mmap(NULL,buff_info.length,PROT_READ|PROT_WRITE,MAP_SHARED,uvc_video_fd,buff_info.m.offset);
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if(video_memaddr_buffer[i]==NULL)
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{
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printf("缓冲区映射失败!\n");
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return -6;
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}
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}
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/*5. 将缓冲区放入采集队列*/
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memset(&buff_info,0,sizeof(struct v4l2_buffer));
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for(i=0;i
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{
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buff_info.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*视频捕获设备*/
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buff_info.index=i; /*缓冲区的节点编号*/
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buff_info.memory=V4L2_MEMORY_MMAP; /*支持mmap内存映射*/
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if(ioctl(uvc_video_fd,VIDIOC_QBUF,&buff_info)) /*根据节点编号将缓冲区放入队列*/
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{
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printf("根据节点编号将缓冲区放入队列失败!\n");
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return -7;
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}
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}
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/*6. 启动摄像头数据采集*/
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int Type=V4L2_BUF_TYPE_VIDEO_CAPTURE;
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if(ioctl(uvc_video_fd,VIDIOC_STREAMON,&Type))
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{
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printf("启动摄像头数据采集失败!\n");
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return -8;
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}
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return 0;
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}
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-
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/*
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函数功能: 采集摄像头的数据,并进行处理
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*/
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void *pthread_video_Data_Handler(void *dev)
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{
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/*循环采集摄像头的数据*/
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struct pollfd fds;
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fds.fd=uvc_video_fd;
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fds.events=POLLIN;
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struct v4l2_buffer buff_info;
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memset(&buff_info,0,sizeof(struct v4l2_buffer));
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int index=0; /*表示当前缓冲区的编号*/
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printf("摄像头开始传输数据.......\n");
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while(1)
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{
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/*1. 等待摄像头采集数据*/
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poll(&fds,1,-1);
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/*2. 取出一帧数据: 从采集队列里面取出一个缓冲区*/
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buff_info.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*视频捕获设备*/
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ioctl(uvc_video_fd,VIDIOC_DQBUF,&buff_info); /*从采集队列取出缓冲区*/
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index=buff_info.index;
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//printf("采集数据的缓冲区的编号:%d\n",index);
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-
/*3. 处理数据: 进行H264编码*/
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//video_memaddr_buffer[index]; /*当前存放数据的缓冲区地址*/
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/*编码一帧数据*/
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encode_frame(video_memaddr_buffer[index]);
-
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/*4. 将缓冲区再次放入采集队列*/
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buff_info.memory=V4L2_MEMORY_MMAP; /*支持mmap内存映射*/
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buff_info.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; /*视频捕获设备*/
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buff_info.index=index; /*缓冲区的节点编号*/
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ioctl(uvc_video_fd,VIDIOC_QBUF,&buff_info); /*根据节点编号将缓冲区放入队列*/
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}
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}
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-
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int main(int argc,char **argv)
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{
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if(argc!=2)
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{
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printf("./app <视频文件名称>\n");
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return 0;
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}
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pthread_t thread;
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/*绑定将要捕获的信号*/
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signal(SIGINT,exit_sighandler);
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signal(SIGSEGV,exit_sighandler);
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signal(SIGPIPE,SIG_IGN);
-
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/*1. 初始化摄像头*/
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if(UVCvideoInit()!=0)
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{
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printf("摄像头数据采集客户端:初始化摄像头失败!\n");
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exit(1);
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}
-
-
/*2. 初始化编码器*/
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X264_init_encoder(Image_Width,Image_Height);
-
-
/*3.创建存放视频的文件*/
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h264_fp=fopen(argv[1],"wa+");
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if(h264_fp==NULL)
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{
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printf("文件创建失败!\n");
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exit(1);
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}
-
-
/*4. 创建线程采集摄像头数据并编码*/
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pthread_create(&thread,NULL,pthread_video_Data_Handler,NULL);
-
-
//设置线程的分离属性
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pthread_detach(thread);
-
-
while(1)
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{
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-
}
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}
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CC=gcc
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all:
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$(CC) x264_VideoEncode.c -o x264_video_encode -lx264 -L./lib -lpthread -lm -ldl
使用的是静态库链接编译。
$ ./x264_video_encode 123.x264
在本地生成一个123.x264文件,可以使用mplayer或者vlc播放器播放。