Integration of codec G.722.1 and G.722.1c (SIREN7/14)

[nanang]

Based on ITU-T Recommendation G.722.1 (05/2005) C fixed point implementation including its Annex C.

[nanang]

In r2563:

• Initial source of G.722.1/Annex C integration.
• Disabled some "odd" modes of L16 codec (11kHz & 22kHz mono & stereo) while releasing some payload types.

[bennylp]

In r2564:

• renamed VS6 project name libg7221 --> libg7221codec

[nanang]

In r2565:

• Fixed generation of G722.1 modes list in enum_codec().

[nanang]

In r2572:

• Fixed G722.1 codec to aware about endianness in packing/unpacking RTP payload (the underlying implementation, ITU impl ref, works with 16-bits coded data).

[nanang]

In r2574:

• Renamed VS6 & VS8 project name/filename: libg7221 --> libg7221codec.
• SVN things: added "output" dir, updated ignore properties.

[nanang]

In r2601:

• Added build config for GNU autoconf & make.
• Fixed some G.722.1 codes for linux & mingw32 targets, e.g: types defs, collision function name 'round'.

[nanang]

In r2603: Minor fix, reset mode counter in g7221_init().

[nanang]

In r2607:

• Fixed libg7221codec build config on vs6: dyn-linking for release, include path.

[bennylp]

In r2613:

• added some ITU test vectors

[bennylp]

In r2614:

• updated VS6, VS8, and Makefile for the test vectors above

[bennylp]

In r2616:

• optimizations (can be up to almost 10x faster now!)

[bennylp]

In r2617:

• VS8 compilation error for libg7221codec and build error in make build system due to last modifications in pjmedia_test

[bennylp]

In r2620:

• similar treatment of PCM level like G.722, i.e. shift PCM sample to the right before encoding and shift to left after decoding
• default is shifted by 1, as this seems to be compatible with Polycom phone
• the shift value is configurable both compile and run-time

[bennylp]

In r2623:

• removed the STL files

[nanang]

In r2639:

• Replaced abort() & printf(), which caused linking error on WM platforms, with pj_assert().

[bennylp]

In r2666:

• added Symbian sypport

[bennylp]

In r2672:

• set default compilation flags -O2 for G.722.1 on Symbian

[bennylp]

In r2675:

• fixed compilation warnings on Linux/gcc-4.3.2

[nanang]

In r2680:

• Minor update in G722.1 default setting in pjmedia codec's config.h: removed phrase 'under development', G722.1 remains disabled by default.