[PATCH spice-streaming-agent 3/3] Externalize plugins usage

[Christophe de Dinechin <christophe@xxxxxxxxxxxx>]

From: Christophe de Dinechin <dinechin@xxxxxxxxxx>

Signed-off-by: Christophe de Dinechin <dinechin@xxxxxxxxxx>
---
 include/spice-streaming-agent/plugin.hpp |  6 ++++++
 src/concrete-agent.cpp                   | 11 +++++++++++
 src/concrete-agent.hpp                   |  1 +
 src/spice-streaming-agent.cpp            | 23 +++++++++++------------
 4 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/include/spice-streaming-agent/plugin.hpp b/include/spice-streaming-agent/plugin.hpp
index 41ad11f..83980d7 100644
--- a/include/spice-streaming-agent/plugin.hpp
+++ b/include/spice-streaming-agent/plugin.hpp
@@ -56,6 +56,12 @@ struct Settings
     unsigned    quality         =      80; // Normalized in 0-100 (100=high)
     unsigned    avg_bitrate     = 3000000; // Target average bitrate in bps
     unsigned    max_bitrate     = 8000000; // Target maximum bitrate
+
+#define STANDARD_OPTIONS_USAGE                                          \
+    "framerate  = [1-240]       Number of frames per second\n"          \
+    "quality    = [1-100]       Normalized quality, 100 = high\n"       \
+    "avg_bitrate= [1-10000000]  Average bits per second for stream\n"   \
+    "max_bitrate= [1-10000000]  Maximum bits per second for stream\n"
 };
 
 /*!
diff --git a/src/concrete-agent.cpp b/src/concrete-agent.cpp
index 59f11b2..377c934 100644
--- a/src/concrete-agent.cpp
+++ b/src/concrete-agent.cpp
@@ -140,6 +140,17 @@ FrameCapture *ConcreteAgent::GetBestFrameCapture()
     return nullptr;
 }
 
+void ConcreteAgent::PluginsUsage()
+{
+    for (auto &plugin: plugins) {
+        printf("\n"
+               "settings for %s:\n"
+               "%s",
+               plugin->Name(),
+               plugin->Usage());
+    }
+}
+
 void ConcreteAgent::ApplyOptions(Plugin *plugin)
 {
     bool usage = false;
diff --git a/src/concrete-agent.hpp b/src/concrete-agent.hpp
index b3d4e06..eeb43f8 100644
--- a/src/concrete-agent.hpp
+++ b/src/concrete-agent.hpp
@@ -34,6 +34,7 @@ public:
     void LoadPlugins(const char *directory);
     void ApplyOptions(Plugin *plugin);
     FrameCapture *GetBestFrameCapture();
+    void PluginsUsage();
 
 private:
     void LoadPlugin(const char *plugin_filename);
diff --git a/src/spice-streaming-agent.cpp b/src/spice-streaming-agent.cpp
index d5984bc..71a36e1 100644
--- a/src/spice-streaming-agent.cpp
+++ b/src/spice-streaming-agent.cpp
@@ -269,18 +269,16 @@ static void register_interrupts(void)
 
 static void usage(const char *progname)
 {
-    printf("usage: %s <options>\n", progname);
-    printf("options are:\n");
-    printf("\t-p portname  -- virtio-serial port to use\n");
-    printf("\t-i accept commands from stdin\n");
-    printf("\t-l file -- log frames to file\n");
-    printf("\t--log-binary -- log binary frames (following -l)\n");
-    printf("\t-d -- enable debug logs\n");
-    printf("\t-c variable=value -- change settings\n");
-    printf("\t\tframerate = 1-100 (check 10,20,30,40,50,60)\n");
-    printf("\n");
-    printf("\t-h or --help     -- print this help message\n");
-
+    printf("usage: %s <options>\n"
+           "options are:\n"
+           "\t-p portname  -- virtio-serial port to use\n"
+           "\t-i accept commands from stdin\n"
+           "\t-l file -- log frames to file\n"
+           "\t--log-binary -- log binary frames (following -l)\n"
+           "\t-d -- enable debug logs\n"
+           "\t-c variable=value -- change settings (see below)\n"
+           "\t-h or --help     -- print this help message\n", progname);
+    agent.PluginsUsage();
     exit(1);
 }
 
@@ -474,6 +472,7 @@ int main(int argc, char* argv[])
             setlogmask(logmask);
             break;
 	case 'h':
+            agent.LoadPlugins(PLUGINSDIR);
 	    usage(argv[0]);
 	    break;
 	}
-- 
2.13.5 (Apple Git-94)

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