- return pkt->data[3] & 0x80;
-}
-
-static int dv_is_wide( AVPacket *pkt )
-{
- int i = 80 /* block size */ *3 /* VAUX starts at block 3 */ +3 /* skip block header */;
-
- for ( ; i < pkt->size; i += 5 /* packet size */ )
- {
- if ( pkt->data[ i ] == 0x61 )
- {
- uint8_t x = pkt->data[ i + 2 ] & 0x7;
- return ( x == 2 ) || ( x == 7 );
- }
- }
- return 0;
-}
-
-static double get_aspect_ratio( mlt_properties properties, AVStream *stream, AVCodecContext *codec_context, AVPacket *pkt )
-{
- double aspect_ratio = 1.0;
-
- if ( codec_context->codec_id == CODEC_ID_DVVIDEO )
- {
- if ( pkt )
- {
- if ( dv_is_pal( pkt ) )
- {
- if ( dv_is_wide( pkt ) )
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 64 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 45 );
- }
- else
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 16 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 15 );
- }
- }
- else
- {
- if ( dv_is_wide( pkt ) )
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 32 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 27 );
- }
- else
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 8 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 9 );
- }
- }
- }
- else
- {
- AVRational ar =
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
- stream->sample_aspect_ratio;
-#else
- codec_context->sample_aspect_ratio;
-#endif
- // Override FFmpeg's notion of DV aspect ratios, which are
- // based upon a width of 704. Since we do not have a normaliser
- // that crops (nor is cropping 720 wide ITU-R 601 video always desirable)
- // we just coerce the values to facilitate a passive behaviour through
- // the rescale normaliser when using equivalent producers and consumers.
- // = display_aspect / (width * height)
- if ( ar.num == 10 && ar.den == 11 )
- {
- // 4:3 NTSC
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 8 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 9 );
- }
- else if ( ar.num == 59 && ar.den == 54 )
- {
- // 4:3 PAL
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 16 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 15 );
- }
- else if ( ar.num == 40 && ar.den == 33 )
- {
- // 16:9 NTSC
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 32 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 27 );
- }
- else if ( ar.num == 118 && ar.den == 81 )
- {
- // 16:9 PAL
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 64 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 45 );
- }
- }
- }
- else
- {
- AVRational codec_sar = codec_context->sample_aspect_ratio;
- AVRational stream_sar =
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
- stream->sample_aspect_ratio;
-#else
- { 0, 1 };
-#endif
- if ( codec_sar.num > 0 )
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", codec_sar.num );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", codec_sar.den );
- }
- else if ( stream_sar.num > 0 )
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", stream_sar.num );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", stream_sar.den );
- }
- else
- {
- mlt_properties_set_int( properties, "meta.media.sample_aspect_num", 1 );
- mlt_properties_set_int( properties, "meta.media.sample_aspect_den", 1 );
- }
- }
- AVRational ar = { mlt_properties_get_double( properties, "meta.media.sample_aspect_num" ), mlt_properties_get_double( properties, "meta.media.sample_aspect_den" ) };
- aspect_ratio = av_q2d( ar );
- mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
-
- return aspect_ratio;