refine the macro SRS_FFMPEG to SRS_FFMPEG_STUB, SRS_FFMPEG_TOOL to build ffmpeg tool

@@ -487,7 +487,7 @@ fi
 #####################################################################################
 # live transcoding, ffmpeg-2.1, x264-core138, lame-3.99.5, libaacplus-2.0.2.
 #####################################################################################
-if [ $SRS_FFMPEG = YES ]; then
+if [ $SRS_FFMPEG_TOOL = YES ]; then
     if [[ -f ${SRS_OBJS}/ffmpeg/bin/ffmpeg ]]; then
         echo "ffmpeg-2.1 is ok.";
     else
@@ -506,13 +506,13 @@ fi
 
 # whatever the FFMPEG tools, if transcode and ingest specified,
 # srs always compile the FFMPEG tool stub which used to start the FFMPEG process.
-__SRS_FFMPEG=NO
-if [ $SRS_TRANSCODE = YES ]; then __SRS_FFMPEG=YES; fi
-if [ $SRS_INGEST = YES ]; then __SRS_FFMPEG=YES; fi
-if [ $__SRS_FFMPEG = YES ]; then
-    echo "#define SRS_FFMPEG" >> $SRS_AUTO_HEADERS_H
+__SRS_FFMPEG_STUB=NO
+if [ $SRS_TRANSCODE = YES ]; then __SRS_FFMPEG_STUB=YES; fi
+if [ $SRS_INGEST = YES ]; then __SRS_FFMPEG_STUB=YES; fi
+if [ $__SRS_FFMPEG_STUB = YES ]; then
+    echo "#define SRS_FFMPEG_STUB" >> $SRS_AUTO_HEADERS_H
 else
-    echo "#undef SRS_FFMPEG" >> $SRS_AUTO_HEADERS_H
+    echo "#undef SRS_FFMPEG_STUB" >> $SRS_AUTO_HEADERS_H
 fi
 
 if [ $SRS_TRANSCODE = YES ]; then

@@ -16,7 +16,7 @@ help=no
 SRS_HLS=RESERVED
 SRS_NGINX=RESERVED
 SRS_SSL=RESERVED
-SRS_FFMPEG=RESERVED
+SRS_FFMPEG_TOOL=RESERVED
 SRS_TRANSCODE=RESERVED
 SRS_INGEST=RESERVED
 SRS_HTTP_PARSER=RESERVED
@@ -75,7 +75,7 @@ do
         --with-ssl)                     SRS_SSL=YES                 ;;
         --with-hls)                     SRS_HLS=YES                 ;;
         --with-nginx)                   SRS_NGINX=YES               ;;
-        --with-ffmpeg)                  SRS_FFMPEG=YES              ;;
+        --with-ffmpeg)                  SRS_FFMPEG_TOOL=YES              ;;
         --with-transcode)               SRS_TRANSCODE=YES           ;;
         --with-ingest)                  SRS_INGEST=YES              ;;
         --with-http-callback)           SRS_HTTP_CALLBACK=YES       ;;
@@ -95,7 +95,7 @@ do
         --without-ssl)                  SRS_SSL=NO                  ;;
         --without-hls)                  SRS_HLS=NO                  ;;
         --without-nginx)                SRS_NGINX=NO                ;;
-        --without-ffmpeg)               SRS_FFMPEG=NO               ;;
+        --without-ffmpeg)               SRS_FFMPEG_TOOL=NO               ;;
         --without-transcode)            SRS_TRANSCODE=NO            ;;
         --without-ingest)               SRS_INGEST=NO               ;;
         --without-http-callback)        SRS_HTTP_CALLBACK=NO        ;;
@@ -136,15 +136,15 @@ if [ $SRS_HTTP_SERVER = YES ]; then SRS_HTTP_PARSER=YES; fi
 if [ $SRS_HTTP_API = YES ]; then SRS_HTTP_PARSER=YES; fi
 
 # if transcode specified, try ffmpeg if possible.
-if [ $SRS_TRANSCODE = YES ]; then if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=YES; fi fi
-if [ $SRS_INGEST = YES ]; then if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=YES; fi fi
+if [ $SRS_TRANSCODE = YES ]; then if [ $SRS_FFMPEG_TOOL = RESERVED ]; then SRS_FFMPEG_TOOL=YES; fi fi
+if [ $SRS_INGEST = YES ]; then if [ $SRS_FFMPEG_TOOL = RESERVED ]; then SRS_FFMPEG_TOOL=YES; fi fi
 
 # if arm specified, set some default to disabled.
 if [ $SRS_ARM_UBUNTU12 = YES ]; then
     if [ $SRS_HLS = RESERVED ]; then SRS_HLS=YES; fi
     SRS_NGINX=NO
     if [ $SRS_SSL = RESERVED ]; then SRS_SSL=YES; fi
-    SRS_FFMPEG=NO
+    SRS_FFMPEG_TOOL=NO
     if [ $SRS_TRANSCODE = RESERVED ]; then SRS_TRANSCODE=YES; fi
     if [ $SRS_INGEST = RESERVED ]; then SRS_INGEST=YES; fi
     if [ $SRS_HTTP_PARSER = RESERVED ]; then SRS_HTTP_PARSER=YES; fi
@@ -169,7 +169,7 @@ else
     if [ $SRS_HLS = RESERVED ]; then SRS_HLS=YES; fi
     if [ $SRS_NGINX = RESERVED ]; then SRS_NGINX=NO; fi
     if [ $SRS_SSL = RESERVED ]; then SRS_SSL=YES; fi
-    if [ $SRS_FFMPEG = RESERVED ]; then SRS_FFMPEG=NO; fi
+    if [ $SRS_FFMPEG_TOOL = RESERVED ]; then SRS_FFMPEG_TOOL=NO; fi
     if [ $SRS_TRANSCODE = RESERVED ]; then SRS_TRANSCODE=NO; fi
     if [ $SRS_INGEST = RESERVED ]; then SRS_INGEST=NO; fi
     if [ $SRS_HTTP_PARSER = RESERVED ]; then SRS_HTTP_PARSER=YES; fi
@@ -196,7 +196,7 @@ if [ $SRS_DEV = YES ]; then
     SRS_HLS=YES
     SRS_NGINX=NO
     SRS_SSL=YES
-    SRS_FFMPEG=YES
+    SRS_FFMPEG_TOOL=YES
     SRS_TRANSCODE=YES
     SRS_INGEST=YES
     SRS_HTTP_PARSER=YES
@@ -222,7 +222,7 @@ if [ $SRS_PI = YES ]; then
     SRS_HLS=YES
     SRS_NGINX=NO
     SRS_SSL=YES
-    SRS_FFMPEG=NO
+    SRS_FFMPEG_TOOL=NO
     SRS_TRANSCODE=YES
     SRS_INGEST=YES
     SRS_HTTP_PARSER=YES
@@ -348,7 +348,7 @@ fi fi
 # check arm, if arm enabled, only allow st/ssl/librtmp,
 # user should disable all other features
 if [ $SRS_ARM_UBUNTU12 = YES ]; then
-    if [ $SRS_FFMPEG = YES ]; then echo "ffmpeg for arm is not available, see: ./configure --help"; __check_ok=NO; fi
+    if [ $SRS_FFMPEG_TOOL = YES ]; then echo "ffmpeg for arm is not available, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_BWTC = YES ]; then echo "bwtc for arm is not available, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_RESEARCH = YES ]; then echo "research for arm is not available, see: ./configure --help"; __check_ok=NO; fi
     if [ $SRS_GPERF = YES ]; then echo "gperf for arm is not available, see: ./configure --help"; __check_ok=NO; fi
@@ -362,7 +362,7 @@ fi
 if [ $SRS_HLS = RESERVED ]; then echo "you must specifies the hls, see: ./configure --help"; __check_ok=NO; fi
 if [ $SRS_NGINX = RESERVED ]; then echo "you must specifies the nginx, see: ./configure --help"; __check_ok=NO; fi
 if [ $SRS_SSL = RESERVED ]; then echo "you must specifies the ssl, see: ./configure --help"; __check_ok=NO; fi
-if [ $SRS_FFMPEG = RESERVED ]; then echo "you must specifies the ffmpeg, see: ./configure --help"; __check_ok=NO; fi
+if [ $SRS_FFMPEG_TOOL = RESERVED ]; then echo "you must specifies the ffmpeg, see: ./configure --help"; __check_ok=NO; fi
 if [ $SRS_HTTP_CALLBACK = RESERVED ]; then echo "you must specifies the http-callback, see: ./configure --help"; __check_ok=NO; fi
 if [ $SRS_HTTP_SERVER = RESERVED ]; then echo "you must specifies the http-server, see: ./configure --help"; __check_ok=NO; fi
 if [ $SRS_HTTP_API = RESERVED ]; then echo "you must specifies the http-api, see: ./configure --help"; __check_ok=NO; fi
@@ -388,7 +388,7 @@ if [ $SRS_PI = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --pi"; fi
 if [ $SRS_HLS = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-hls"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-hls"; fi
 if [ $SRS_NGINX = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-nginx"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-nginx"; fi
 if [ $SRS_SSL = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ssl"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ssl"; fi
-if [ $SRS_FFMPEG = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ffmpeg"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ffmpeg"; fi
+if [ $SRS_FFMPEG_TOOL = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ffmpeg"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ffmpeg"; fi
 if [ $SRS_TRANSCODE = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-transcode"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-transcode"; fi
 if [ $SRS_INGEST = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-ingest"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-ingest"; fi
 if [ $SRS_HTTP_CALLBACK = YES ]; then SRS_CONFIGURE="${SRS_CONFIGURE} --with-http-callback"; else SRS_CONFIGURE="${SRS_CONFIGURE} --without-http-callback"; fi

@@ -16,7 +16,7 @@ BLACK="\\e[0m"
 
 #####################################################################################
 # parse user options, set the variables like:
-# srs features: SRS_SSL/SRS_HLS/SRS_NGINX/SRS_FFMPEG/SRS_HTTP_CALLBACK/......
+# srs features: SRS_SSL/SRS_HLS/SRS_NGINX/SRS_FFMPEG_TOOL/SRS_HTTP_CALLBACK/......
 # build options: SRS_JOBS
 #####################################################################################
 SRS_AUTO_HEADERS_H="${SRS_OBJS}/srs_auto_headers.hpp"
@@ -84,7 +84,7 @@ if [ $SRS_UTEST = YES ]; then SrsUtestMakeEntry="(cd ${SRS_OBJS}/utest; \$(MAKE)
 SrsHlsSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HLS = YES ]; then SrsHlsSummaryColor="\${GREEN}"; fi
 SrsNginxSummaryColor="\${GREEN}{disabled} "; if [ $SRS_NGINX = YES ]; then SrsNginxSummaryColor="\${GREEN}"; fi
 SrsSslSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_SSL = YES ]; then SrsSslSummaryColor="\${GREEN}"; fi
-SrsFfmpegSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_FFMPEG = YES ]; then SrsFfmpegSummaryColor="\${GREEN}"; fi
+SrsFfmpegSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_FFMPEG_TOOL = YES ]; then SrsFfmpegSummaryColor="\${GREEN}"; fi
 SrsTranscodeSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_TRANSCODE = YES ]; then SrsTranscodeSummaryColor="\${GREEN}"; fi
 SrsIngestSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_INGEST = YES ]; then SrsIngestSummaryColor="\${GREEN}"; fi
 SrsHttpCallbackSummaryColor="\${YELLOW}{disabled} "; if [ $SRS_HTTP_CALLBACK = YES ]; then SrsHttpCallbackSummaryColor="\${GREEN}"; fi
@@ -520,7 +520,7 @@ if [ $SRS_SSL = YES ]; then
 else
     echo -e "${YELLOW}warning: without rtmp complex handshake support, donot support h264/aac to adobe flash player${BLACK}"
 fi
-if [ $SRS_FFMPEG = YES ]; then
+if [ $SRS_FFMPEG_TOOL = YES ]; then
     echo -e "${GREEN}transcode/mux/ingest tool FFMPEG is enabled${BLACK}"
 else
     echo -e "${YELLOW}warning: without transcode/mux/ingest tool FFMPEG support${BLACK}"
@@ -613,7 +613,7 @@ if [ $SRS_NGINX = YES ]; then
     echo "\" sudo ./objs/nginx/sbin/nginx  \" to start the nginx http server for hls"
     echo "\" http://$ip \" rtmp players(OSMF/JWPlayer)"
 fi
-if [ $SRS_FFMPEG = YES ]; then
+if [ $SRS_FFMPEG_TOOL = YES ]; then
     echo -e "\" ./objs/ffmpeg/bin/ffmpeg  \" is used for live stream transcoding"
 fi
 if [ $SRS_HTTP_CALLBACK = YES ]; then

@@ -289,7 +289,7 @@ int SrsEncoder::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsRequest* req, SrsConfDir
     // write ffmpeg info to log file.
     log_file = _srs_config->get_ffmpeg_log_dir();
     log_file += "/";
-    log_file += "encoder";
+    log_file += "ffmpeg-encoder";
     log_file += "-";
     log_file += req->vhost;
     log_file += "-";

@@ -39,7 +39,7 @@ using namespace std;
 #include <srs_app_pithy_print.hpp>
 #include <srs_protocol_rtmp_stack.hpp>
 
-#ifdef SRS_FFMPEG
+#ifdef SRS_FFMPEG_STUB
 
 #define SRS_ENCODER_COPY    "copy"
 #define SRS_ENCODER_NO_VIDEO    "vn"

@@ -29,7 +29,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include <srs_core.hpp>
 
-#ifdef SRS_FFMPEG
+#ifdef SRS_FFMPEG_STUB
 
 #include <string>
 #include <vector>

@@ -246,7 +246,7 @@ int SrsIngester::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsConfDirective* vhost, S
     // write ffmpeg info to log file.
     log_file = _srs_config->get_ffmpeg_log_dir();
     log_file += "/";
-    log_file += "ingest";
+    log_file += "ffmpeg-ingest";
     log_file += "-";
     log_file += vhost->arg0();
     log_file += "-";
@@ -305,6 +305,7 @@ int SrsIngester::initialize_ffmpeg(SrsFFMPEG* ffmpeg, SrsConfDirective* vhost, S
     
     std::string vcodec = _srs_config->get_engine_vcodec(engine);
     std::string acodec = _srs_config->get_engine_acodec(engine);
+    // whatever the engine config, use copy as default.
     if (!engine || !_srs_config->get_engine_enabled(engine) || vcodec.empty() || acodec.empty()) {
         if ((ret = ffmpeg->initialize_copy()) != ERROR_SUCCESS) {
             return ret;

@@ -163,6 +163,9 @@ SrsServer::SrsServer()
     srs_assert(_srs_config);
     _srs_config->subscribe(this);
     
+    // donot new object in constructor,
+    // for some global instance is not ready now,
+    // new these objects in initialize instead.
 #ifdef SRS_HTTP_API
     http_api_handler = NULL;
 #endif