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Another set of definitions for G.729

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Originally committed as revision 14973 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Voroshilov 2008-08-26 07:10:38 +00:00
parent 274335e76c
commit 7ad909bd59
2 changed files with 24 additions and 0 deletions
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9
libavcodec/g729data.h
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@ -27,6 +27,15 @@
/// Moving Average (MA) prediction order /// Moving Average (MA) prediction order
#define MA_NP 4 #define MA_NP 4
#define VQ_1ST_BITS 7 ///< first stage vector of quantizer (size in bits)
#define VQ_2ND_BITS 5 ///< second stage vector of quantizer (size in bits)
#define GC_1ST_IDX_BITS_8K 3 ///< gain codebook (first stage) index, 8k mode (size in bits)
#define GC_2ND_IDX_BITS_8K 4 ///< gain codebook (second stage) index, 8k mode (size in bits)
#define GC_1ST_IDX_BITS_6K4 3 ///< gain codebook (first stage) index, 6.4k mode (size in bits)
#define GC_2ND_IDX_BITS_6K4 3 ///< gain codebook (second stage) index, 6.4k mode (size in bits)
/** /**
* first stage LSP codebook * first stage LSP codebook
* (10-dimensional, with 128 entries (3.24 of G.729) * (10-dimensional, with 128 entries (3.24 of G.729)

15
libavcodec/g729dec.c
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@ -48,6 +48,21 @@
*/ */
#define LSFQ_DIFF_MIN 321 #define LSFQ_DIFF_MIN 321
/**
* minimum gain pitch value (3.8, Equation 47)
* 0.2 in (1.14)
*/
#define SHARP_MIN 3277
/**
* maximum gain pitch value (3.8, Equation 47)
* (EE) This does not comply with the specification.
* Specification says about 0.8, which should be
* 13107 in (1.14), but reference C code uses
* 13017 (equals to 0.7945) instead of it.
*/
#define SHARP_MAX 13017
/** /**
* \brief pseudo random number generator * \brief pseudo random number generator
*/ */