From dbf7b7228ef8aed9d12e4f5d42bab0f0dac28136 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20=C3=96man?= <andreas@lonelycoder.com>
Date: Sun, 10 Feb 2008 13:55:29 +0000
Subject: [PATCH] extract video framerate from PSI descriptiors

---
 dvb_support.h |  1 +
 parsers.c     |  2 +-
 parsers.h     |  2 ++
 psi.c         | 15 +++++++++++----
 4 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/dvb_support.h b/dvb_support.h
index cbf4264b..49cc4805 100644
--- a/dvb_support.h
+++ b/dvb_support.h
@@ -26,6 +26,7 @@
 #ifndef DVB_SUPPORT_H
 #define DVB_SUPPORT_H
 
+#define DVB_DESC_VIDEO_STREAM 0x02
 #define DVB_DESC_CA           0x09
 #define DVB_DESC_LANGUAGE     0x0a
 
diff --git a/parsers.c b/parsers.c
index d2efaae1..be7f5ce0 100644
--- a/parsers.c
+++ b/parsers.c
@@ -409,7 +409,7 @@ parse_pes_header(th_transport_t *t, th_stream_t *st, uint8_t *buf, size_t len)
 /**
  * MPEG2VIDEO frame duration table (in 90kHz clock domain)
  */
-const static unsigned int mpeg2video_framedurations[16] = {
+const unsigned int mpeg2video_framedurations[16] = {
   0,
   3753,
   3750,
diff --git a/parsers.h b/parsers.h
index 2f6c9488..6b610e14 100644
--- a/parsers.h
+++ b/parsers.h
@@ -29,4 +29,6 @@ void parse_compute_pts(th_transport_t *t, th_stream_t *st, th_pkt_t *pkt);
 
 void parser_enqueue_packet(th_transport_t *t, th_stream_t *st, th_pkt_t *pkt);
 
+extern const unsigned int mpeg2video_framedurations[16];
+
 #endif /* PARSERS_H */
diff --git a/psi.c b/psi.c
index 8e359305..203fe5ec 100644
--- a/psi.c
+++ b/psi.c
@@ -30,6 +30,7 @@
 #include "dvb_support.h"
 #include "tsdemux.h"
 #include "strtab.h"
+#include "parsers.h"
 
 int
 psi_section_reassemble(psi_section_t *ps, uint8_t *data, int len, 
@@ -177,7 +178,7 @@ psi_parse_pmt(th_transport_t *t, uint8_t *ptr, int len, int chksvcid)
   tv_streamtype_t hts_stream_type;
   th_stream_t *st;
   char lang[4];
-
+  int frameduration;
   if(len < 9)
     return -1;
 
@@ -222,7 +223,7 @@ psi_parse_pmt(th_transport_t *t, uint8_t *ptr, int len, int chksvcid)
 
     ptr += 5;
     len -= 5;
-
+    frameduration = 0;
     hts_stream_type = 0;
 
     switch(estype) {
@@ -253,6 +254,10 @@ psi_parse_pmt(th_transport_t *t, uint8_t *ptr, int len, int chksvcid)
 	break;
 
       switch(dtag) {
+      case DVB_DESC_VIDEO_STREAM:
+	frameduration = mpeg2video_framedurations[(ptr[0] >> 3) & 0xf];
+	break;
+
       case DVB_DESC_LANGUAGE:
 	memcpy(lang, ptr, 3);
 	break;
@@ -276,10 +281,12 @@ psi_parse_pmt(th_transport_t *t, uint8_t *ptr, int len, int chksvcid)
     if(hts_stream_type != 0) {
       st = transport_add_stream(t, pid, hts_stream_type);
       st->st_tb = (AVRational){1, 90000};
-
       memcpy(st->st_lang, lang, 4);
+
+      if(st->st_frame_duration == 0)
+	st->st_frame_duration = frameduration;
     }
-  } 
+  }
 
   t->tht_pmt_seen = 1;
   return 0;