From 9a73d00fff022811a113f64aef59984672f469c2 Mon Sep 17 00:00:00 2001
From: Dan Kortschak <dan@kortschak.io>
Date: Sat, 18 Aug 2018 23:28:26 +0930
Subject: [PATCH] generator: disect and annotate pat and pmt tables

---
 generator/mpegts_generator.go | 46 +++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/generator/mpegts_generator.go b/generator/mpegts_generator.go
index b6646668..42dceaa1 100644
--- a/generator/mpegts_generator.go
+++ b/generator/mpegts_generator.go
@@ -39,8 +39,50 @@ const psiPacketSize = 184
 
 // TODO: really need to finish the at and pmt stuff - this is too hacky
 var (
-	patTable = []byte{0, 0, 176, 13, 0, 1, 193, 0, 0, 0, 1, 240, 0, 42, 177, 4, 178}
-	pmtTable = []byte{0, 2, 176, 18, 0, 1, 193, 0, 0, 0xE1, 0x00, 0xF0, 0, 0x1B, 0xE1, 0, 0xF0, 0, 0x15, 0xBD, 0x4D, 0x56}
+	patTable = []byte{
+		0x00, // pointer
+
+		// table header
+		0x00, // table id
+		0xb0, // section syntax indicator:1|private bit:1|reserved:2|section length:2|more bytes...:2
+		0x0d, // more bytes...
+
+		// syntax section
+		0x00, 0x01, // table id extension
+		0xc1, // reserved bits:3|version:5|use now:1
+		0x00, // section number
+		0x00, // last section number
+		// table data
+		0x00, 0x01, // Program number
+		0xf0, 0x00, // reserved:3|program map PID:13
+
+		0x2a, 0xb1, 0x04, 0xb2, // CRC
+	}
+	pmtTable = []byte{
+		0x00, // pointer
+
+		// table header
+		0x02, // table id.
+		0xb0, // section syntax indicator:1|private bit:1|reserved:2|section length:2|more bytes...:2
+		0x12, // more bytes...
+
+		// syntax section
+		0x00, 0x01, // table id extension
+		0xc1, // reserved bits:3|version:5|use now:1
+		0x00, // section number
+		0x00, // last section number
+		// table data
+		0xe1, 0x00, // reserved:3|PCR PID:13
+		0xf0, 0x00, // reserved:4|unused:2|program info length:10
+		// No program descriptors since program info length is 0.
+		// elementary stream info data
+		0x1b,       // stream type
+		0xe1, 0x00, // reserved:3|elementary PID:13
+		0xf0, 0x00, // reserved:4|unused:2|ES info length:10
+		// No elementary stream descriptos since ES info length is 0.
+
+		0x15, 0xbd, 0x4d, 0x56, // CRC
+	}
 )
 
 func init() {