Add ffmpeg patch for TV metadata

ffmpeg/ffmpeg.tv.patch.sh

@@ -0,0 +1,97 @@
+#!/bin/sh
+#
+# Patch for ffmpeg so forked-daapd can extract iTunes TV metadata from mp4 video files
+# Ace Jones <ace.jones1@yahoo.com>
+# 
+# Usage: chmod +x this file, and run it from the directory above where you want ffmpeg
+#
+svn checkout svn://svn.ffmpeg.org/ffmpeg/trunk ffmpeg
+patch -p0 < $0
+exit
+Index: ffmpeg/libavformat/mov.c
+===================================================================
+--- ffmpeg/libavformat/mov.c	(revision 20790)
++++ ffmpeg/libavformat/mov.c	(working copy)
+@@ -80,19 +80,45 @@
+ 
+ static const MOVParseTableEntry mov_default_parse_table[];
+ 
+-static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
++static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len, const char *key)
+ {
+     char buf[16];
+ 
+     get_be16(pb); // unknown
+     snprintf(buf, sizeof(buf), "%d", get_be16(pb));
+-    av_metadata_set(&c->fc->metadata, "track", buf);
++    av_metadata_set(&c->fc->metadata, key, buf);
+ 
+     get_be16(pb); // total tracks
+ 
+     return 0;
+ }
+ 
++static int mov_metadata_int8(MOVContext *c, ByteIOContext *pb, unsigned len, const char *key)
++{
++  char buf[16];
++  
++  /* bypass padding bytes */
++  get_byte(pb);
++  get_byte(pb);
++  get_byte(pb);
++  
++  snprintf(buf, sizeof(buf-1), "%hu", get_byte(pb));
++  buf[sizeof(buf)-1] = 0;
++  av_metadata_set(&c->fc->metadata, key, buf);
++
++  return 0;
++}
++
++static int mov_metadata_stik(MOVContext *c, ByteIOContext *pb, unsigned len, const char *key)
++{
++  char buf[16];
++  
++  snprintf(buf, sizeof(buf-1), "%hu", get_byte(pb));
++  buf[sizeof(buf)-1] = 0;
++  av_metadata_set(&c->fc->metadata, key, buf);
++
++  return 0;
++}
+ static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
+ {
+ #ifdef MOV_EXPORT_ALL_METADATA
+@@ -101,7 +127,7 @@
+     char str[1024], key2[16], language[4] = {0};
+     const char *key = NULL;
+     uint16_t str_size;
+-    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
++    int (*parse)(MOVContext*, ByteIOContext*, unsigned, const char*) = NULL;
+ 
+     switch (atom.type) {
+     case MKTAG(0xa9,'n','a','m'): key = "title";     break;
+@@ -122,6 +148,12 @@
+     case MKTAG( 't','v','s','h'): key = "show";      break;
+     case MKTAG( 't','v','e','n'): key = "episode_id";break;
+     case MKTAG( 't','v','n','n'): key = "network";   break;
++    case MKTAG( 't','v','e','s'): key = "episode_sort";
++        parse = mov_metadata_int8; break;
++    case MKTAG( 't','v','s','n'): key = "season_number";
++        parse = mov_metadata_int8; break;
++    case MKTAG( 's','t','i','k'): key = "stik";
++        parse = mov_metadata_stik; break;
+     case MKTAG( 't','r','k','n'): key = "track";
+         parse = mov_metadata_trkn; break;
+     }
+@@ -157,10 +189,11 @@
+     str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
+ 
+     if (parse)
+-        parse(c, pb, str_size);
++        parse(c, pb, str_size, key);
+     else {
+         get_buffer(pb, str, str_size);
+         str[str_size] = 0;
++
+         av_metadata_set(&c->fc->metadata, key, str);
+         if (*language && strcmp(language, "und")) {
+             snprintf(key2, sizeof(key2), "%s-%s", key, language);