48#define AM_MPEGSTREAMTYPE_ELEMENTLENGTH(pStreamType) FIELD_OFFSET(AM_MPEGSTREAMTYPE, bFormat[(pStreamType)->mt.cbFormat])
49#define AM_MPEGSTREAMTYPE_NEXT(pStreamType) ((AM_MPEGSTREAMTYPE *)((PBYTE)(pStreamType) + ((AM_MPEGSTREAMTYPE_ELEMENTLENGTH(pStreamType) + 7) & ~7)))
50#define AM_MPEG_AUDIO_DUAL_MERGE 0
51#define AM_MPEG_AUDIO_DUAL_LEFT 1
52#define AM_MPEG_AUDIO_DUAL_RIGHT 2
#define DECLARE_INTERFACE_(i, b)
struct tagAM_MPEGSTREAMTYPE AM_MPEGSTREAMTYPE
struct tagAM_MPEGSYSTEMTYPE AM_MPEGSYSTEMTYPE
AM_MPEGSTREAMTYPE Streams[1]