This chapter lists information about the Digital Media
Library (libdmedia) included in the IRIS Digital Media
Development Environment. It describes new features and
known problems and workarounds.
The Digital Media Library contains many handy subroutines
for converting image and audio data, for working with SMPTE
timecode, and for managing _D_M_p_a_r_a_m_s parameter/value lists.
4.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
This section lists changes and additions to the Digital
Media Library since the IRIX 5.3 release.
+o IRIX 6.5.14 adds support for decompressing QuickTime
Planar RGB movie files which have a depth of 8, 24, and
32 color and 8 bit grey scale.
+o IRIX 6.5.12 adds support for decompressing Microsoft
RLE. This will only work with data which was previously
generated using Quicktime(*).
+o A programming interface for image color conversion has
been added to the libdmedia library. See the
ddddmmmmCCCCoooolllloooorrrr((((3333ddddmmmm)))) man page for more information. A
programming example of the use of the new color
converter interface can be found in the file
////uuuussssrrrr////sssshhhhaaaarrrreeee////ssssrrrrcccc////ddddmmmmeeeeddddiiiiaaaa////vvvviiiiddddeeeeoooo////vvvvllll////ccccoooolllloooorrrrccccaaaappppttttuuuurrrreeee....cccc. The
vino device driver is now implemented as a loadable
kernel module (see mmmmllllooooaaaadddd((((4444))))).
+o There are new routines for doing SMPTE timecode
arithmetic, and there are utility routines for decoding
VITC and LTC timecode. See the man pages
ddddmmmmTTTTCCCCAAAAddddddddTTTTCCCC((((3333ddddmmmm)))), ddddmmmmVVVVIIIITTTTCCCC((((3333ddddmmmm)))), and ddddmmmmLLLLTTTTCCCC((((3333ddddmmmm)))) for more
information.
+o There are new routines for audio sampling rate
conversion, for mu-law/A-law conversion, and for ITU
Recommendation G.722 audio encoding/decoding. See the
man pages ddddmmmmAAAAuuuuddddiiiiooooRRRRaaaatttteeeeCCCCoooonnnnvvvveeeerrrrtttt((((3333ddddmmmm)))), ddddmmmmGGGG777711111111((((3333ddddmmmm)))),
ddddmmmmGGGG777722222222EEEEnnnnccccooooddddeeee((((3333ddddmmmm)))), ddddmmmmGGGG777722222222DDDDeeeeccccooooddddeeee((((3333ddddmmmm)))) for information.
+o Support for decompression of Microsoft RLE AVI files