\u5728\u5d4c\u5165\u5f0fLinux\u73af\u5883\u4e0b\u7f16\u8bd1live555，\u6700\u8ba9\u4eba\u5934\u75bc\u7684\u5c31\u662f\u4ea4\u53c9\u7f16\u8bd1\u5de5\u5177\u94fe\u7684\u914d\u7f6e\u548c\u4f9d\u8d56\u5e93\u7684\u94fe\u63a5\u95ee\u9898\u3002\u6211\u5f53\u5e74\u7b2c\u4e00\u6b21\u5728ARM\u5e73\u53f0\u7f16\u8bd1live555\u65f6，\u6574\u6574\u6298\u817e\u4e86\u4e24\u5929，\u8e29\u4e86\u4e0d\u5c11\u5751\u3002\u8fd9\u91cc\u5206\u4eab\u4e00\u4e9b\u5b9e\u6218\u7ecf\u9a8c，\u5e2e\u4f60\u5feb\u901f\u7ed5\u8fc7\u8fd9\u4e9b\u5751\u3002<\/p>\n
\u5148\u4e0b\u8f7d\u6700\u65b0\u7684live555\u6e90\u7801\u5305，\u89e3\u538b\u540e\u8fdb\u5165\u76ee\u5f55\u3002\u5173\u952e\u6b65\u9aa4\u662f\u914d\u7f6e\u4ea4\u53c9\u7f16\u8bd1\u73af\u5883，\u5b98\u65b9\u63d0\u4f9b\u4e86\u4e00\u4e2aconfig.armlinux\u6a21\u677f，\u6211\u4eec\u53ef\u4ee5\u590d\u5236\u4e00\u4efd\u8fdb\u884c\u4fee\u6539：<\/p>\n
tar -xzvf live.2024.04.19.tar.gz
\ncd live
\ncp config.armlinux config.myarmlinux<\/p>\n
\u7f16\u8f91config.myarmlinux\u6587\u4ef6，\u91cd\u70b9\u4fee\u6539\u4ee5\u4e0b\u51e0\u4e2a\u53c2\u6570：<\/p>\n
CROSS_COMPILE?= \/your\/toolchain\/path\/arm-linux-gnueabi-
\nCOMPILE_OPTS = $(INCLUDES) -I. -O2 -DSOCKLEN_T=socklen_t -DNO_SSTREAM=1
\nC_COMPILER = $(CROSS_COMPILE)gcc
\nCPLUSPLUS_COMPILER = $(CROSS_COMPILE)g++
\nCPLUSPLUS_FLAGS = $(COMPILE_OPTS) -Wall -DBSD=1 -Wno-deprecated -std=c++11
\nLINK = $(CROSS_COMPILE)g++ -o
\nPREFIX = \/your\/install\/path<\/p>\n
\u8fd9\u91cc\u6709\u51e0\u4e2a\u5173\u952e\u70b9\u9700\u8981\u6ce8\u610f：-std=c++11\u9009\u9879\u5fc5\u987b\u52a0\u4e0a，\u56e0\u4e3a\u65b0\u7248\u672c\u7684live555\u4f7f\u7528\u4e86C++11\u7279\u6027\u3002\u5982\u679c\u9047\u5230std::atomic_flag\u6ca1\u6709test\u65b9\u6cd5\u7684\u9519\u8bef，\u9700\u8981\u4fee\u6539\u4e3atest_and_set()\u3002<\/p>\n
\u751f\u6210Makefile\u5e76\u7f16\u8bd1：<\/p>\n
.\/genMakefiles myarmlinux
\nmake -j4<\/p>\n
\u7f16\u8bd1\u5b8c\u6210\u540e\u7ecf\u5e38\u9047\u5230"undefined reference"\u9519\u8bef，\u8fd9\u662f\u56e0\u4e3a\u5e93\u94fe\u63a5\u987a\u5e8f\u4e0d\u5bf9\u3002\u6b63\u786e\u7684\u94fe\u63a5\u987a\u5e8f\u5e94\u8be5\u662f：libliveMedia.a\u3001libBasicUsageEnvironment.a\u3001libgroupsock.a\u3001libUsageEnvironment.a\u3002\u786e\u4fddlibliveMedia.a\u653e\u5728\u7b2c\u4e00\u4f4d\u3002<\/p>\n
\u5728\u5b89\u9632\u76d1\u63a7\u6216\u65e0\u4eba\u673a\u56fe\u4f20\u573a\u666f\u4e2d，\u7ecf\u5e38\u9700\u8981\u540c\u65f6\u5904\u7406\u591a\u8def\u89c6\u9891\u6d41\u3002\u8fd9\u65f6\u5019\u6027\u80fd\u4f18\u5316\u5c31\u7279\u522b\u91cd\u8981\u4e86\u3002\u6211\u505a\u8fc7\u4e00\u4e2a8\u8defD1\u89c6\u9891\u6d41\u7684\u9879\u76ee，\u6700\u521dCPU\u5360\u7528\u7387\u9ad8\u8fbe60%，\u7ecf\u8fc7\u4f18\u5316\u540e\u964d\u5230\u4e8630%\u4ee5\u4e0b\u3002<\/p>\n
\u53cc\u961f\u5217\u7f13\u51b2\u8bbe\u8ba1\u662f\u5173\u952e\u4f18\u5316\u70b9\u3002\u539f\u6765\u7684\u5355\u961f\u5217\u8bbe\u8ba1\u5b58\u5728\u89c6\u9891\u5e27\u548c\u97f3\u9891\u5e27\u6df7\u5408\u7684\u95ee\u9898，\u5f53\u670d\u52a1\u5668\u9700\u8981\u89c6\u9891\u6570\u636e\u65f6，\u5982\u679c\u961f\u5217\u5c3e\u90e8\u662f\u97f3\u9891\u5e27，\u5c31\u4f1a\u5bfc\u81f4\u53d6\u4e0d\u5230\u6570\u636e\u800c\u7b49\u5f85\u3002\u6211\u4eec\u6539\u4e3a\u97f3\u89c6\u9891\u5206\u79bb\u7684\u53cc\u961f\u5217：<\/p>\n
typedef struct {
\n unsigned char* video_buffer[CHANNEL_NUM];
\n unsigned char* audio_buffer[CHANNEL_NUM];
\n int video_front[CHANNEL_NUM], video_rear[CHANNEL_NUM];
\n int audio_front[CHANNEL_NUM], audio_rear[CHANNEL_NUM];
\n} DualRingBuffer;<\/p>\n
\u8fd9\u6837\u8bbe\u8ba1\u540e，\u89c6\u9891\u6d41\u548c\u97f3\u9891\u6d41\u4e92\u4e0d\u5e72\u6270，\u5927\u5927\u51cf\u5c11\u4e86\u961f\u5217\u6ee1\u7684\u60c5\u51b5\u3002\u5728\u5b9e\u9645\u6d4b\u8bd5\u4e2d，8\u8def\u5168\u5f00\u8fd0\u884c\u4e24\u5929\u90fd\u6ca1\u6709\u51fa\u73b0\u961f\u5217\u6ee1\u7684\u95ee\u9898\u3002<\/p>\n
\u5185\u5b58\u96f6\u62f7\u8d1d\u4f18\u5316\u662f\u53e6\u4e00\u4e2a\u91cd\u70b9\u3002\u539f\u6765\u7684\u6d41\u7a0b\u4e2d\u6709\u591a\u6b21\u5185\u5b58\u62f7\u8d1d：<\/p>\n
\u6211\u4eec\u901a\u8fc7\u4f20\u9012\u6307\u9488\u800c\u4e0d\u662f\u62f7\u8d1d\u6570\u636e\u6765\u5b9e\u73b0\u96f6\u62f7\u8d1d：<\/p>\n
void SNDeviceSource::doGetNextFrame() {
\n \/\/ \u539f\u6765\u9700\u8981memcpy(fTo, fVideoFrame, fFrameSize);
\n \/\/ \u6539\u4e3a\u76f4\u63a5\u4f20\u9012\u6307\u9488
\n fTo = fVideoFrame;
\n fFrameSize = fVideoFrameSize;
\n afterGetting(this);
\n}<\/p>\n
\u540c\u65f6\u4fee\u6539MultiFramedRTPSink\u4e2d\u7684packFrame\u548cafterGettingFrame1\u51fd\u6570，\u4f7f\u7528iovec\u7ed3\u6784\u4f53\u6765\u7ba1\u7406\u5206\u6563\u7684\u5185\u5b58\u5757：<\/p>\n
struct iovec fVecBuf[6];
\nfVecBuf[3].iov_base = rtpHeader;
\nfVecBuf[4].iov_base = fragmentHeader;
\nfVecBuf[5].iov_base = frameData;<\/p>\n
\u5bf9\u4e8eTCP\u4f20\u8f93，\u76f4\u63a5\u4f7f\u7528writev\u7cfb\u7edf\u8c03\u7528\u53d1\u9001\u5206\u6563\u7684\u5185\u5b58\u5757\u3002\u5bf9\u4e8eUDP，\u7531\u4e8e\u9700\u8981connect\u5230\u7279\u5b9a\u5bf9\u7aef，\u6211\u4eec\u4ecd\u7136\u9700\u8981\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u8fde\u7eed\u5185\u5b58\u4e2d\u518d\u7528sendto\u53d1\u9001\u3002<\/p>\n
live555\u81ea\u5e26\u7684testH264VideoStreamer\u793a\u4f8b\u53ea\u80fd\u64ad\u653e\u6587\u4ef6，\u6211\u4eec\u9700\u8981\u5c06\u5176\u6539\u9020\u4e3a\u652f\u6301\u5b9e\u65f6\u89c6\u9891\u6d41\u7684\u670d\u52a1\u5668\u3002\u6838\u5fc3\u662f\u7ee7\u627f\u5e76\u91cd\u5199\u5173\u952e\u7c7b\u3002<\/p>\n
\u9996\u5148\u521b\u5efa\u81ea\u5b9a\u4e49\u7684FramedSource\u5b50\u7c7b：<\/p>\n
class LiveCameraSource : public FramedSource {
\npublic:
\n static LiveCameraSource* createNew(UsageEnvironment& env, int cameraId);<\/p>\n
protected:
\n LiveCameraSource(UsageEnvironment& env, int cameraId);
\n virtual ~LiveCameraSource();<\/p>\n
private:
\n virtual void doGetNextFrame();
\n static void deliverFrameStub(void* clientData);
\n void deliverFrame();<\/p>\n
private:
\n int fCameraId;
\n unsigned char* fBuffer;
\n};<\/p>\n
\u5728doGetNextFrame\u4e2d\u5b9e\u73b0\u4ece\u6444\u50cf\u5934\u83b7\u53d6\u6570\u636e：<\/p>\n
void LiveCameraSource::doGetNextFrame() {
\n \/\/ \u4ece\u6444\u50cf\u5934\u9a71\u52a8\u83b7\u53d6\u4e00\u5e27\u6570\u636e
\n int frameSize = get_camera_frame(fCameraId, fBuffer, fMaxSize);
\n if (frameSize > 0) {
\n fFrameSize = frameSize;
\n fTo = fBuffer; \/\/ \u96f6\u62f7\u8d1d\u4f20\u9012\u6307\u9488
\n afterGetting(this);
\n } else {
\n handleClosure();
\n }
\n}<\/p>\n
\u7136\u540e\u521b\u5efa\u81ea\u5b9a\u4e49\u7684ServerMediaSubsession：<\/p>\n
class LiveCameraMediaSubsession : public OnDemandServerMediaSubsession {
\npublic:
\n static LiveCameraMediaSubsession* createNew(UsageEnvironment& env, int cameraId);<\/p>\n
protected:
\n virtual FramedSource* createNewStreamSource(unsigned clientSessionId, unsigned& estBitrate);
\n virtual RTPSink* createNewRTPSink(Groupsock* rtpGroupsock, unsigned char rtpPayloadTypeIfDynamic, FramedSource* inputSource);
\n};<\/p>\n
\u6700\u540e\u5728\u4e3b\u51fd\u6570\u4e2d\u521b\u5efaRTSP\u670d\u52a1\u5668\u5e76\u6dfb\u52a0\u4f1a\u8bdd：<\/p>\n
RTSPServer* rtspServer = RTSPServer::createNew(env, 8554);
\nServerMediaSession* sms = ServerMediaSession::createNew(env, "live", "Live Camera", "Live stream");
\nsms->addSubsession(LiveCameraMediaSubsession::createNew(env, 0));
\nrtspServer->addServerMediaSession(sms);<\/p>\n
\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d，\u7ecf\u5e38\u4f1a\u9047\u5230\u5404\u79cd\u95ee\u9898\u3002\u6bd4\u5982\u5ba2\u6237\u7aef\u8fde\u63a5\u6570\u591a\u4e86\u4e4b\u540e\u6027\u80fd\u4e0b\u964d，\u6216\u8005\u51fa\u73b0\u5185\u5b58\u6cc4\u6f0f\u3002\u8fd9\u91cc\u5206\u4eab\u51e0\u4e2a\u6392\u67e5\u6280\u5de7\u3002<\/p>\n
CPU\u5360\u7528\u7387\u8fc7\u9ad8\u7684\u6392\u67e5：\u4f7f\u7528top\u547d\u4ee4\u67e5\u770bCPU\u5360\u7528\u60c5\u51b5，\u5982\u679c\u53d1\u73b0CPU\u5360\u7528\u8fc7\u9ad8，\u53ef\u4ee5\u4f7f\u7528perf\u5de5\u5177\u8fdb\u884c\u6027\u80fd\u5206\u6790：<\/p>\n
perf top -p <pid>
\nperf record -p <pid> -g
\nperf report<\/p>\n
\u5e38\u89c1\u7684\u6027\u80fd\u74f6\u9888\u53ef\u80fd\u5728\u5185\u5b58\u62f7\u8d1d\u3001\u9501\u7ade\u4e89\u6216\u8005\u9891\u7e41\u7684\u7cfb\u7edf\u8c03\u7528\u4e0a\u3002\u901a\u8fc7perf\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u70ed\u70b9\u51fd\u6570\u3002<\/p>\n
\u5185\u5b58\u6cc4\u6f0f\u7684\u6392\u67e5：\u4f7f\u7528valgrind\u5de5\u5177\u68c0\u6d4b\u5185\u5b58\u6cc4\u6f0f：<\/p>\n
valgrind –leak-check=full –show-leak-kinds=all .\/your_program<\/p>\n
\u5728live555\u4e2d，\u9700\u8981\u7279\u522b\u6ce8\u610fMedium\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570，\u786e\u4fdd\u6b63\u786e\u8c03\u7528close()\u65b9\u6cd5\u3002<\/p>\n
\u7f51\u7edc\u6027\u80fd\u4f18\u5316：\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u7684\u573a\u666f，\u53ef\u4ee5\u8c03\u6574\u5185\u6838\u7f51\u7edc\u53c2\u6570：<\/p>\n
echo 1024 > \/proc\/sys\/net\/core\/somaxconn
\necho 65535 > \/proc\/sys\/net\/ipv4\/ip_local_port_range<\/p>\n
\u8fd8\u53ef\u4ee5\u8bbe\u7f6eTCP_NODELAY\u9009\u9879\u51cf\u5c11\u5ef6\u8fdf：<\/p>\n
int flag = 1;
\nsetsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(int));<\/p>\n
\u591a\u8def\u6d41\u8d1f\u8f7d\u5747\u8861：\u5f53\u5904\u7406\u591a\u8def\u89c6\u9891\u6d41\u65f6，\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u591a\u4e2a\u7ebf\u7a0b\u6216\u8fdb\u7a0b\u6765\u5904\u7406\u4e0d\u540c\u7684\u6d41\u3002\u867d\u7136live555\u662f\u5355\u7ebf\u7a0b\u8bbe\u8ba1，\u4f46\u53ef\u4ee5\u5728\u6570\u636e\u6e90\u5c42\u9762\u505a\u5e76\u884c\u5316：<\/p>\n
void* video_capture_thread(void* arg) {
\n int camera_id = *(int*)arg;
\n while (1) {
\n Frame frame = capture_frame(camera_id);
\n push_to_queue(camera_id, frame);
\n notify_new_frame(camera_id);
\n }
\n}<\/p>\n
\u6bcf\u4e2a\u6444\u50cf\u5934\u4e00\u4e2a\u91c7\u96c6\u7ebf\u7a0b，\u7136\u540e\u5c06\u6570\u636e\u63a8\u9001\u5230\u5bf9\u5e94\u7684\u961f\u5217\u4e2d，\u7531live555\u7684\u4e3b\u7ebf\u7a0b\u6765\u53d6\u6570\u636e\u3002\u8fd9\u6837\u53ef\u4ee5\u5229\u7528\u591a\u6838CPU\u7684\u4f18\u52bf\u3002<\/p>\n
\u7ecf\u8fc7\u8fd9\u4e9b\u4f18\u5316\u540e，\u5728\u5d4c\u5165\u5f0f\u5e73\u53f0\u4e0a\u5904\u74068\u8defD1\u89c6\u9891\u6d41，CPU\u5360\u7528\u7387\u53ef\u4ee5\u63a7\u5236\u572830%\u5de6\u53f3，\u5b8c\u5168\u6ee1\u8db3\u5b9e\u65f6\u6027\u8981\u6c42\u3002\u8bb0\u5f97\u5728\u6b63\u5f0f\u90e8\u7f72\u524d\u8fdb\u884c\u957f\u65f6\u95f4\u7684\u538b\u529b\u6d4b\u8bd5，\u786e\u4fdd\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
1. \u5d4c\u5165\u5f0f\u5e73\u53f0live555\u4ea4\u53c9\u7f16\u8bd1\u5b9e\u6218
\n\u5728\u5d4c\u5165\u5f0fLinux\u73af\u5883\u4e0b\u7f16\u8bd1live555，\u6700\u8ba9\u4eba\u5934\u75bc\u7684\u5c31\u662f\u4ea4\u53c9\u7f16\u8bd1\u5de5\u5177\u94fe\u7684\u914d\u7f6e\u548c\u4f9d\u8d56\u5e93\u7684\u94fe\u63a5\u95ee\u9898\u3002\u6211\u5f53\u5e74\u7b2c\u4e00\u6b21\u5728ARM\u5e73\u53f0\u7f16\u8bd1live555\u65f6，\u6574\u6574\u6298\u817e\u4e86\u4e24\u5929，\u8e29\u4e86\u4e0d\u5c11\u5751\u3002\u8fd9\u91cc\u5206\u4eab\u4e00\u4e9b\u5b9e\u6218\u7ecf\u9a8c，\u5e2e\u4f60\u5feb\u901f\u7ed5\u8fc7\u8fd9\u4e9b\u5751\u3002
\n\u5148\u4e0b\u8f7d\u6700\u65b0\u7684live555\u6e90\u7801\u5305，\u89e3\u538b\u540e\u8fdb\u5165\u76ee\u5f55\u3002\u5173\u952e\u6b65\u9aa4\u662f\u914d\u7f6e\u4ea4\u53c9\u7f16\u8bd1\u73af\u5883，\u5b98\u65b9\u63d0\u4f9b\u4e86\u4e00\u4e2aconfig.armlinux\u6a21\u677f<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[8113,700,701,219],"topic":[],"class_list":["post-76740","post","type-post","status-publish","format-standard","hentry","category-server","tag-8113","tag-live555","tag-rtsp","tag-219"],"yoast_head":"\n