Update README with guides for GCC evaluation and docker-free compilations

.gitignore

@@ -77,3 +77,7 @@
 target/
 src/
 .gclient_entries
+.gclient_previous_sync_commits
+*.log
+outaudio*
+outvideo*

BandwidthEstimator.py

@@ -0,0 +1,26 @@
+
+class Estimator(object):
+    def __init__(self):
+        self.cnt = 0
+        self.bandwidths = [1e6, 2e6]
+
+    def report_states(self, stats: dict):
+        '''
+        stats is a dict with the following items
+        {
+            "send_time_ms": uint,
+            "arrival_time_ms": uint,
+            "payload_type": int,
+            "sequence_number": uint,
+            "ssrc": int,
+            "padding_length": uint,
+            "header_length": uint,
+            "payload_size": uint
+        }
+        '''
+        pass
+
+    def get_estimated_bandwidth(self)->int:
+        bandwidth = self.bandwidths[self.cnt % len(self.bandwidths)]
+        self.cnt += 1
+        return bandwidth

Makefile

@@ -22,25 +22,24 @@ all: init sync app release
 init:
 	docker build dockers --build-arg UID=$(shell id -u) --build-arg GUID=$(shell id -g) -f $(build_dockerfile) -t $(compile_docker)
 
-release:
-	docker build $(target_dir) -f $(release_dockerfile) -t $(release_docker)
-
 sync:
 	docker run $(docker_flags) $(compile_docker) \
 		make docker-$@ \
 		output_dir=$(output_dir) \
 		gn_flags=$(gn_flags)
 
-app: peerconnection_serverless
-
-peerconnection_serverless:
+app:
 	docker run $(docker_flags) $(compile_docker) \
 		make docker-$@ \
 		output_dir=$(output_dir) \
 		target_lib_dir=$(target_lib_dir) \
 		target_bin_dir=$(target_bin_dir) \
 		target_pylib_dir=$(target_pylib_dir)
 
+release:
+	docker build $(target_dir) -f $(release_dockerfile) -t $(release_docker)
+
+
 # Docker internal command
 
 docker-sync:
@@ -49,9 +48,7 @@ docker-sync:
 	rm -rf src
 	gn gen $(output_dir) $(gn_flags)
 
-docker-app: docker-peerconnection_serverless
-
-docker-peerconnection_serverless:
+docker-app:
 	ninja -C $(output_dir) peerconnection_serverless
 
 	mkdir -p $(target_lib_dir)