From d0ba6aee86a77c15831497f97987d94f09227eda Mon Sep 17 00:00:00 2001
From: ronag <ronag@362d55ac-95cf-4e76-9f9a-cbaa9c17b72d>
Date: Thu, 18 Aug 2011 11:17:06 +0000
Subject: [PATCH] git-svn-id:
 https://casparcg.svn.sourceforge.net/svnroot/casparcg/server/branches/2.0.0.2@1213
 362d55ac-95cf-4e76-9f9a-cbaa9c17b72d

---
 modules/ffmpeg/producer/format/flv.cpp | 70 ++++++++++++++++++++++++++
 modules/ffmpeg/producer/format/flv.h   | 26 ++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 modules/ffmpeg/producer/format/flv.cpp
 create mode 100644 modules/ffmpeg/producer/format/flv.h

diff --git a/modules/ffmpeg/producer/format/flv.cpp b/modules/ffmpeg/producer/format/flv.cpp
new file mode 100644
index 000000000..3ebcc8ec0
--- /dev/null
+++ b/modules/ffmpeg/producer/format/flv.cpp
@@ -0,0 +1,70 @@
+#include "../../stdafx.h"
+
+#include "flv.h"
+
+#include <common/exception/exceptions.h>
+
+#include <boost/filesystem.hpp>
+
+#include <iostream>
+
+namespace caspar {
+	
+double to_double(std::vector<char> bytes, bool readInReverse)
+{
+    if(bytes.size() != 8)
+		BOOST_THROW_EXCEPTION(caspar_exception());
+
+    if (readInReverse)
+		std::reverse(bytes.begin(), bytes.end());
+	
+	static_assert(sizeof(double) == 8, "");
+
+	double* tmp = (double*)bytes.data();
+	
+	double val = *tmp;
+    return val;
+}
+
+double next_double(std::fstream& fileStream, int offset, int length)
+{
+    fileStream.seekg(offset, std::ios::cur);
+	std::vector<char> bytes(length);
+    fileStream.read(bytes.data(), length);
+    return to_double(bytes, true);
+}
+
+flv_meta_info read_flv_meta_info(const std::wstring& filename)
+{
+	if(!boost::filesystem::exists(filename))
+		BOOST_THROW_EXCEPTION(caspar_exception());
+
+	flv_meta_info meta_info;
+
+    std::fstream fileStream = std::fstream(narrow(filename), std::fstream::in);
+	fileStream.seekg(27, std::ios::beg);
+	
+    std::array<char, 10> bytes;
+    fileStream.read(bytes.data(), bytes.size());
+
+	auto on_meta_data = std::string(bytes.begin(), bytes.end());   
+	if (on_meta_data == "onMetaData")
+    {
+        //// 16 bytes past "onMetaData" is the data for "duration" 
+        meta_info.duration = next_double(fileStream, 16, 8);
+        //// 8 bytes past "duration" is the data for "width"
+        meta_info.width = next_double(fileStream, 8, 8);
+        //// 9 bytes past "width" is the data for "height"
+        meta_info.height = next_double(fileStream, 9, 8);
+        //// 16 bytes past "height" is the data for "videoDataRate"
+        meta_info.video_data_rate = next_double(fileStream, 16, 8);
+        //// 16 bytes past "videoDataRate" is the data for "audioDataRate"
+        meta_info.audio_data_rate = next_double(fileStream, 16, 8);
+        //// 12 bytes past "audioDataRate" is the data for "frameRate"
+        meta_info.frame_rate = next_double(fileStream, 12, 8);
+    }
+    
+    return meta_info;
+}
+
+}
\ No newline at end of file
diff --git a/modules/ffmpeg/producer/format/flv.h b/modules/ffmpeg/producer/format/flv.h
new file mode 100644
index 000000000..8ec2265c4
--- /dev/null
+++ b/modules/ffmpeg/producer/format/flv.h
@@ -0,0 +1,26 @@
+#pragma once
+
+namespace caspar {
+	   
+struct flv_meta_info
+{
+   double duration;
+   double width;
+   double height;
+   double frame_rate;
+   double video_data_rate;
+   double audio_data_rate;
+
+   flv_meta_info()
+	   : duration(0.0)
+	   , width(0.0)
+	   , height(0.0)
+	   , frame_rate(0.0)
+	   , video_data_rate(0.0)
+	   , audio_data_rate(0.0)
+   {}
+};
+
+flv_meta_info read_flv_meta_info(const std::wstring& filename);
+
+}
\ No newline at end of file
-- 
2.39.2