{"id":1452,"date":"2022-03-14T00:05:15","date_gmt":"2022-03-13T16:05:15","guid":{"rendered":"https:\/\/www.xianwaizhiyin.net\/?p=1452"},"modified":"2023-11-21T19:50:46","modified_gmt":"2023-11-21T11:50:46","slug":"srs4-0%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90-srsrecvthreadcycle","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=1452","title":{"rendered":"SRS4.0\u6e90\u7801\u5206\u6790-SrsRecvThread::cycle"},"content":{"rendered":"\n<p><strong>\u300a<a href=\"https:\/\/srs.xianwaizhiyin.net\">SRS\u539f\u7406<\/a>\u300b\u4e0a\u67b6\u4e86\uff0c\u6df1\u5ea6\u5256\u6790 SRS \u6e90\u4ee3\u7801\uff0c\u8bbf\u95ee\u5730\u5740\uff1asrs.xianwaizhiyin.net<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u672c\u6587\u91c7\u7528\u7684 SRS \u7248\u672c\u662f 4.0-b8 \uff0c \u4e0b\u8f7d\u5730\u5740\uff1a<a href=\"https:\/\/github.com\/ossrs\/srs\/releases\/tag\/v4.0-b8\">github<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u4ece\u300aSRS4.0\u6e90\u7801\u5206\u6790-SrsRtmpConn::stream_service_cycle\u300b \u5f97\u77e5 \uff0c\u771f\u6b63\u63a5\u53d7\u5ba2\u6237\u7aef\u97f3\u89c6\u9891\u6d41\u6570\u636e\u7684\u5730\u65b9\u662f <code class=\"prettyprint\" >SrsRecvThread::cycle()<\/code> \u3002<\/p>\n\n\n\n<p>\u90a3\u5ba2\u6237\u7aef\u63a8\u89c6\u9891\u6d41\u6765\u4e4b\u540e\uff0c\u670d\u52a1\u5668\u6709\u6ca1\u7f13\u5b58\uff1f\u670d\u52a1\u5668\u7f13\u5b58\u591a\u5c11\u79d2\uff1f\u600e\u4e48\u914d\u7f6e SRS \u8ba9 RTMP \u76f4\u64ad\u7684\u5ef6\u8fdf\u964d\u4f4e\uff1f<\/p>\n\n\n\n<p>\u5e26\u7740\u8fd9\u4e9b\u7591\u95ee\uff0c\u5f00\u59cb\u7814\u7a76\u3002 <code class=\"prettyprint\" >SrsRecvThread::cycle()<\/code> \u51fd\u6570 \u7684 \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"655\" height=\"486\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-1.png\" alt=\"\" class=\"wp-image-1454\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-1.png 655w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-1-300x223.png 300w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u9762\u7684\u53d8\u91cf <code class=\"prettyprint\" >pumper<\/code> \u662f <code>SrsPublishRecvThread<\/code>\uff0c\u6240\u4ee5 <code>on_start()<\/code> \u662f\u6307 <code>SrsPublishRecvThread<\/code> \u7684 <code>on_start()<\/code> \u3002<\/p>\n\n\n\n<p><code class=\"prettyprint\" >SrsRecvThread::cycle()<\/code> \u662f\u4e00\u4e2a\u534f\u7a0b\u51fd\u6570\uff0c\u91cc\u9762\u7684\u91cd\u70b9\u662f <code>do_cycle()<\/code>\uff0c\u63a5\u4e0b\u6765\u5206\u6790 <code>SrsRecvThread::do_cycle()<\/code> \u51fd\u6570\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"588\" height=\"497\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-2.png\" alt=\"\" class=\"wp-image-1455\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-2.png 588w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-2-300x254.png 300w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >SrsRecvThread::do_cycle()<\/code> \u51fd\u6570 \u7684\u91cd\u70b9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>1\uff0c\u518d\u6b21\u89c1\u5230\u8fd9\u4e2a <code class=\"prettyprint\" >trd-&gt;pull()<\/code> \u8fd9\u4e2a\u5e94\u8be5\u662f\u4e2a\u9519\u8bef\u7801\u5c01\u88c5\u5904\u7406\u3002<\/p>\n\n\n\n<p>2\uff0c\u6700\u91cd\u8981\u7684\u662f\u4e0b\u9762\u4e24\u884c\u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >\/\/ Process the received message.\nif ((err = rtmp-&gt;recv_message(&amp;msg)) == srs_success) {\n    err = pumper-&gt;consume(msg);\n}<\/code><\/pre>\n\n\n\n<p>\u8bfb\u53d6 RTMP \u6d88\u606f\uff0c\u7136\u540e\u4e22\u7ed9 <code class=\"prettyprint\" >pumper<\/code> \u5904\u7406\uff0c\u4e4b\u524d\u8bf4\u8fc7 <code>pumper<\/code> \u662f <code>SrsPublishRecvThread<\/code>\uff0c\u5728\u8fd9\u91cc\uff0c\u5927\u90e8\u5206\u7684 RTMP\u6d88\u606f \u90fd\u662f\u97f3\u9891\u5e27\u6216\u8005\u89c6\u9891\u5e27\u3002\u8fd9\u91cc\u62ff\u5230\u7684 RTMP \u6d88\u606f\u5df2\u7ecf\u662f\u7531\u591a\u4e2a chunk \u62fc\u63a5\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u89c6\u9891\u5e27\u7684\u4e86\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>google_ads_content<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u4e0b\u9762\u5f00\u59cb\u5206\u6790 <code class=\"prettyprint\" >SrsPublishRecvThread::consume()<\/code> \u51fd\u6570\u7684\u5185\u90e8\u903b\u8f91\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"757\" height=\"732\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-3.png\" alt=\"\" class=\"wp-image-1456\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-3.png 757w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-3-300x290.png 300w\" sizes=\"auto, (max-width: 757px) 100vw, 757px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u56fe\u6709\u4e24\u4e2a\u91cd\u70b9\uff1a<\/p>\n\n\n\n<p>1\uff0c\u7edf\u8ba1 <code class=\"prettyprint\" >video_frames<\/code>\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >if (msg-&gt;header.is_video()) {\n    video_frames++;\n}<\/code><\/pre>\n\n\n\n<p>2\uff0c\u628a RTMP \u6d88\u606f\u4e22\u7ed9 <code class=\"prettyprint\" >_conn<\/code> \u5904\u7406\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >err = _conn-&gt;handle_publish_message(_source, msg);<\/code><\/pre>\n\n\n\n<p>3\uff0c\u6700\u540e\u4f7f\u7528\u4e86\u4e00\u4e0b <code class=\"prettyprint\" >srs_thread_yield()<\/code>\uff0cyield \u7684\u539f\u7406\uff0c\u8bf7\u770b\u540e\u7eed\u6587\u7ae0 \u300aSRS4.0\u6e90\u7801\u5206\u6790-yield\u300b<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u63a5\u4e0b\u6765\u5206\u6790 <code class=\"prettyprint\" >_conn-&gt;handle_publish_message()<\/code> \u51fd\u6570\u7684\u5185\u90e8\u903b\u8f91\uff0c\u8fd9\u91cc\u7684 <code>_conn<\/code> \u662f <code>SrsRtmpConn<\/code>\uff0c<code>SrsRtmpConn::handle_publish_message()<\/code> \u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"847\" height=\"314\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-4.png\" alt=\"\" class=\"wp-image-1457\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-4.png 847w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-4-300x111.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-4-768x285.png 768w\" sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u56fe\u5c31\u4e24\u4e2a\u903b\u8f91\uff1a<\/p>\n\n\n\n<p>1\uff0c\u5904\u7406 AMF \u7c7b\u578b \u7684 RTMP\u6d88\u606f\u3002<\/p>\n\n\n\n<p>2\uff0c\u7528 <code class=\"prettyprint\" >process_publish_message()<\/code> \u5904\u7406\u89c6\u9891\uff0c\u97f3\u9891\u7684 RTMP\u6d88\u606f\u3002<\/p>\n\n\n\n<p>\u7ee7\u7eed\u5206\u6790 <code class=\"prettyprint\" >process_publish_message()<\/code> \u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u8bf7\u770b\u4e0b\u56fe\u4ee3\u7801\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"680\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-5.png\" alt=\"\" class=\"wp-image-1458\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-5.png 880w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-5-300x232.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-5-768x593.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >process_publish_message()<\/code> \u51fd\u6570\u67093\u4e2a\u91cd\u70b9\uff1a<\/p>\n\n\n\n<p>1\uff0c\u5904\u7406 MetaData \u6570\u636e\uff0cRTMP\u76f4\u64ad\u4f20\u8f93\u97f3\u89c6\u9891\uff0c\u901a\u5e38\u60c5\u51b5 MetaData \u662f\u7528 flv \u90a3\u79cd tag \u5c01\u88c5\u7684\uff0c\u4f46\u662f \u89c6\u9891\u5e27\u662f\u76f4\u63a5\u4f20\u7684 H264\u7684\u88f8\u6570\u636e\uff0cH264\u6709\u4e00\u4e2a\u7f51\u7edc\u4f20\u8f93\u5c42\u3002<\/p>\n\n\n\n<p>2\uff0c\u5904\u7406\u97f3\u9891\u6570\u636e\u3002<\/p>\n\n\n\n<p>3\uff0c\u5904\u7406\u89c6\u9891\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u54b1\u4eec\u4e3b\u8981\u5206\u6790\u89c6\u9891\u7684\u63a8\u6d41\uff0c\u97f3\u9891\u5148\u653e\u4e00\u653e\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\u5206\u6790 <code class=\"prettyprint\" >source-&gt;on_video()<\/code> \u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"762\" height=\"574\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-6.png\" alt=\"\" class=\"wp-image-1459\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-6.png 762w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-6-300x226.png 300w\" sizes=\"auto, (max-width: 762px) 100vw, 762px\" \/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >source-&gt;on_video()<\/code> \u51fd\u6570 \u4e3b\u8981\u6709\u4ee5\u4e0b\u903b\u8f91\uff1a<\/p>\n\n\n\n<p>1\uff0c\u68c0\u6d4b\u89c6\u9891\u5e27\u7684\u65f6\u95f4\u6233\u662f\u4e0d\u662f\u9012\u589e\u7684\uff0c\u68c0\u67e5RTMP\u5934\u6709\u6ca1\u95ee\u9898\u3002<\/p>\n\n\n\n<p>2\uff0c\u8c03 <code class=\"prettyprint\" >on_video_imp()<\/code> \u5904\u7406\u89c6\u9891\u5e27\u3002<\/p>\n\n\n\n<p>\u5230\u8fd9\u91cc\uff0c\u6574\u4f53\u7684\u51fd\u6570\u8c03\u7528\u94fe\u6761\u6709\u70b9\u957f\uff0c\u5148\u753b\u4e2a\u6d41\u7a0b\u56fe\u4fbf\u4e8e\u7406\u89e3\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-8.png\" alt=\"\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u4e0b\u9762\u5f00\u59cb\u5206\u6790 <code class=\"prettyprint\" >on_video_imp()<\/code> \u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"786\" height=\"692\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-9.png\" alt=\"\" class=\"wp-image-1461\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-9.png 786w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-9-300x264.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-9-768x676.png 768w\" sizes=\"auto, (max-width: 786px) 100vw, 786px\" \/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >on_video_imp()<\/code> \u51fd\u6570 \u4e3b\u8981\u6709 3\u4e2a\u91cd\u70b9\uff1a<\/p>\n\n\n\n<p>1\uff0c\u5bf9 <code class=\"prettyprint\" >sequence_header<\/code> \u7684\u5904\u7406\u3002sequence_header \u53ef\u4ee5\u7406\u89e3\u4e3a H264 \u7f51\u7edc\u5305\u7684\u4e00\u4e2a\u5934\u3002\u5177\u4f53\u5b9a\u4e49\u5728 \u6807\u51c6\u2f42\u6863\u300aISO-14496-15 AVC file format\u300b\uff0c\u641c\u7d22 <code>AVCDecoderConfigurationRecord<\/code> \u5c31\u884c\u3002<\/p>\n\n\n\n<p>2\uff0c<code class=\"prettyprint\" >hub-&gt;on_video()<\/code> \u5c31\u662f <code>SrsOriginHub::on_video()<\/code>\uff0c\u8fd9\u4e2a\u51fd\u6570\u4e3b\u8981\u628a H264\u5305\u6570\u636e\uff0c\u89e3\u6790\u5230 \u4e24\u4e2a\u53d8\u91cf <code>SrsVideoFrame* video<\/code> \u8ddf<code>SrsVideoCodecConfig* vcodec<\/code>\u3002<\/p>\n\n\n\n<p>3\uff0c<code class=\"prettyprint\" >bridger_-&gt;on_video()<\/code> \u5c31\u662f <code>SrsRtcFromRtmpBridger::on_video()<\/code>\uff0c\u8fd9\u4e2a\u4e3b\u8981\u662f\u4e00\u4e2a\u6865\u63a5\u8f6c\u6362\u3002 RTMP \u8f6c SRT\uff0cRTC \u7684\uff0c\u4e0d\u7528\u7ba1\u3002<\/p>\n\n\n\n<p>4\uff0c<code class=\"prettyprint\" >consumer-&gt;enqueue()<\/code> \u662f <code>SrsLiveConsumer::enqueue()<\/code>\uff0c\u8fd9\u4e2a\u662f\u91cd\u4e2d\u4e4b\u91cd\uff0c\u4f1a\u628a H264 \u89c6\u9891\u5e27 \u63d2\u5165\u961f\u5217\uff0c\u7136\u540e\u5982\u679c\u8fbe\u5230 350000 \u6beb\u79d2\u5c31\u901a\u8fc7\u6761\u4ef6\u53d8\u91cf\uff0c\u901a\u77e5\u64ad\u653e\u534f\u7a0b\u6765\u53d6\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u5df2\u7ecf\u627e\u5230\u4e86\uff0c\u670d\u52a1\u5668\u7f13\u5b58 \u89c6\u9891\u7684\u5730\u65b9\uff0c\u670d\u52a1\u5668\u7f13\u5b58\u89c6\u9891\u9ed8\u8ba4\u662f 350000\uff0c\u8fd9\u4e2a\u503c\u5e94\u8be5\u53ef\u4ee5\u5728\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e\u3002<\/p>\n\n\n\n<p>\u64ad\u653e\u534f\u7a0b\u963b\u585e\u7684\u5730\u65b9\u6211\u622a\u56fe\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"911\" height=\"603\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-10.png\" alt=\"\" class=\"wp-image-1462\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-10.png 911w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-10-300x199.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/srs-10-10-768x508.png 768w\" sizes=\"auto, (max-width: 911px) 100vw, 911px\" \/><\/figure>\n\n\n\n<p><code class=\"prettyprint\" >SrsRecvThread::cycle()<\/code> \u51fd\u6570\u5206\u6790\u5b8c\u6bd5\uff0c\u4e0b\u4e00\u7bc7\u6587\u7ae0\u8bb2\u89e3\u5982\u4f55\u964d\u4f4e RTMP \u76f4\u64ad\u7684\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u7531\u4e8e\u7b14\u8005\u7684\u6c34\u5e73\u6709\u9650\uff0c 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