开始修改播放器

src/Player/Track.cpp

@@ -3,3 +3,51 @@
 //
 
 #include "Track.h"
+#include "Util/util.h"
+#include "Util/base64.h"
+
+using namespace ZL::Util;
+
+Track::Ptr Track::getTrackBySdp(const string &sdp) {
+    if (strcasestr(sdp.data(), "mpeg4-generic") != nullptr) {
+        string aac_cfg_str = FindField(sdp.c_str(), "config=", "\r\n");
+        if (aac_cfg_str.size() != 4) {
+            aac_cfg_str = FindField(sdp.c_str(), "config=", ";");
+        }
+        if (aac_cfg_str.size() != 4) {
+            return nullptr;
+        }
+        string aac_cfg;
+
+        unsigned int cfg1;
+        sscanf(aac_cfg_str.substr(0, 2).c_str(), "%02X", &cfg1);
+        cfg1 &= 0x00FF;
+        aac_cfg.push_back(cfg1);
+
+        unsigned int cfg2;
+        sscanf(aac_cfg_str.substr(2, 2).c_str(), "%02X", &cfg2);
+        cfg2 &= 0x00FF;
+        aac_cfg.push_back(cfg2);
+
+        return std::make_shared<AACTrack>(aac_cfg);
+    }
+
+    if (strcasestr(sdp.data(), "h264") != nullptr) {
+        string sps_pps = FindField(sdp.c_str(), "sprop-parameter-sets=", "\r\n");
+        if(sps_pps.empty()){
+            return std::make_shared<H264Track>();
+        }
+        string base64_SPS = FindField(sps_pps.c_str(), NULL, ",");
+        string base64_PPS = FindField(sps_pps.c_str(), ",", NULL);
+        if(base64_PPS.back() == ';'){
+            base64_PPS.pop_back();
+        }
+
+        auto sps = decodeBase64(base64_SPS);
+        auto pps = decodeBase64(base64_PPS);
+        return std::make_shared<H264Track>(sps,pps,0,0);
+    }
+
+
+    return nullptr;
+}