* mp4: support vobsub in .mp4 (NeroRecode), but won't work if the video

has been cropped.

modules/demux/mp4/libmp4.c

@@ -409,7 +409,12 @@ static int MP4_NextBox( MP4_Stream_t *p_stream, MP4_Box_t *p_box )
             return( 0 ); /* out of bound */
         }
     }
-    return( MP4_SeekStream( p_stream, p_box->i_size + p_box->i_pos ) ? 0 : 1 );
+    if( MP4_SeekStream( p_stream, p_box->i_size + p_box->i_pos ) )
+    {
+        return 0;
+    }
+
+    return 1;
 }
 
 /*****************************************************************************
@@ -1390,6 +1395,12 @@ static void MP4_FreeBox_sample_vide( MP4_Box_t *p_box )
     FREE( p_box->data.p_sample_vide->p_qt_image_description );
 }
 
+static int MP4_ReadBox_sample_mp4s( MP4_Stream_t *p_stream, MP4_Box_t *p_box )
+{
+    MP4_SeekStream( p_stream, p_box->i_pos + MP4_BOX_HEADERSIZE( p_box ) + 8 );
+    MP4_ReadBoxContainerRaw( p_stream, p_box );
+    return 1;
+}
 
 static int MP4_ReadBox_sample_text( MP4_Stream_t *p_stream, MP4_Box_t *p_box )
 {
@@ -2322,7 +2333,7 @@ static struct
     { FOURCC_jpeg,  MP4_ReadBox_sample_vide,    MP4_FreeBox_sample_vide },
     { FOURCC_avc1,  MP4_ReadBox_sample_vide,    MP4_FreeBox_sample_vide },
 
-    { FOURCC_mp4s,  MP4_ReadBox_default,        MP4_FreeBox_Common },
+    { FOURCC_mp4s,  MP4_ReadBox_sample_mp4s,    MP4_FreeBox_Common },
 
     /* XXX there is 2 box where we could find this entry stbl and tref*/
     { FOURCC_hint,  MP4_ReadBox_default,        MP4_FreeBox_Common },

modules/demux/mp4/libmp4.h

@@ -170,6 +170,7 @@
 #define FOURCC_priv VLC_FOURCC( 'p', 'r', 'i', 'v' )
 
 #define FOURCC_text VLC_FOURCC( 't', 'e', 'x', 't' )
+#define FOURCC_subp VLC_FOURCC( 's', 'u', 'b', 'p' )
 
 #define FOURCC_0xa9nam VLC_FOURCC( 0xa9, 'n', 'a', 'm' )
 #define FOURCC_0xa9aut VLC_FOURCC( 0xa9, 'a', 'u', 't' )

modules/demux/mp4/mp4.c

@@ -597,7 +597,9 @@ static int Demux( demux_t *p_demux )
                                   (uint32_t*)p_block->p_buffer,
                                   p_block->i_buffer );
                 }
-                else if( tk->fmt.i_cat == SPU_ES && p_block->i_buffer >= 2 )
+                else if( tk->fmt.i_cat == SPU_ES )
+                {
+                    if( tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) && p_block->i_buffer >= 2 )
                     {
                         uint16_t i_size = GetWBE( p_block->p_buffer );
 
@@ -621,7 +623,9 @@ static int Demux( demux_t *p_demux )
                             p_block->i_buffer = 0;
                         }
                     }
+                }
                 p_block->i_dts = MP4_TrackGetPTS( p_demux, tk ) + 1;
+                fprintf( stderr, "dts=%lld\n", p_block->i_dts );
 
                 p_block->i_pts = tk->fmt.i_cat == VIDEO_ES ? 0 : p_block->i_dts + 1;
 
@@ -787,8 +791,13 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
             return VLC_SUCCESS;
         }
 
+        case DEMUX_GET_TITLE_INFO:
+        case DEMUX_SET_NEXT_DEMUX_TIME:
+        case DEMUX_SET_GROUP:
+            return VLC_EGENERIC;
+
         default:
-            msg_Err( p_demux, "control query unimplemented !!!" );
+            msg_Warn( p_demux, "control query unimplemented !!!" );
             return VLC_EGENERIC;
     }
 }
@@ -1048,7 +1057,7 @@ static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
     p_sample = MP4_BoxGet(  p_track->p_stsd, "[%d]",
                 p_track->chunk[i_chunk].i_sample_description_index - 1 );
 
-    if( !p_sample || !p_sample->data.p_data )
+    if( !p_sample || ( !p_sample->data.p_data && p_track->fmt.i_cat != SPU_ES ) )
     {
         msg_Warn( p_demux,
                   "cannot find SampleEntry (track[Id 0x%x])",
@@ -1058,7 +1067,7 @@ static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
 
     p_track->p_sample = p_sample;
 
-    if( p_track->i_sample_size == 1 )
+    if( p_track->fmt.i_cat == AUDIO_ES && p_track->i_sample_size == 1 )
     {
         MP4_Box_data_sample_soun_t *p_soun;
 
@@ -1175,6 +1184,15 @@ static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
             case( 0x6c ): /* jpeg */
                 p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' );
                 break;
+
+            /* Private ID */
+            case( 0xe0 ): /* NeroDigital: dvd subs */
+                if( p_track->fmt.i_cat == SPU_ES )
+                {
+                    p_track->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
+                    break;
+                }
+            /* Fallback */
             default:
                 /* Unknown entry, but don't touch i_fourcc */
                 msg_Warn( p_demux,
@@ -1597,6 +1615,7 @@ static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
             break;
 
         case( FOURCC_text ):
+        case( FOURCC_subp ):
             p_track->fmt.i_cat = SPU_ES;
             break;