Layer II

Data Structures
struct	quantclass
	quantization class table More...
Functions
static void	II_samples (struct mad_bitptr *ptr, struct quantclass const *quantclass, mad_fixed_t output[3])
	Decodes three requantized Layer II samples from a bitstream.
int	mad_layer_II (struct mad_stream *stream, struct mad_frame *frame)
	Decodes a single Layer II frame.
Variables
struct {
unsigned int   sblimit
unsigned char const   offsets [30]
}	sbquant_table [5]
struct {
unsigned short   nbal
unsigned short   offset
}	bitalloc_table [8]
static unsigned char const	offset_table [6][15]
	offsets into quantization class table
static struct quantclass	qc_table [17]

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Function Documentation

static void II_samples	(	struct mad_bitptr *	ptr,
		struct quantclass const *	quantclass,
		mad_fixed_t	output[3]
	)			[static]

Decodes three requantized Layer II samples from a bitstream.

Definition at line 292 of file layer12.c.

References quantclass::bits, quantclass::C, quantclass::D, quantclass::group, mad_bit_read(), MAD_F_FRACBITS, mad_f_mul, quantclass::nlevels, and s.

Referenced by mad_layer_II().

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int mad_layer_II	(	struct mad_stream *	stream,
		struct mad_frame *	frame
	)

Decodes a single Layer II frame.

Definition at line 341 of file layer12.c.

References bitalloc_table, mad_header::bitrate, mad_header::crc_check, mad_header::crc_target, mad_stream::error, mad_header::flags, mad_frame::header, II_samples(), mad_bit_crc(), mad_bit_length(), mad_bit_read(), MAD_ERROR_BADCRC, MAD_ERROR_BADMODE, MAD_ERROR_BADSCALEFACTOR, mad_f_mul, MAD_FLAG_FREEFORMAT, MAD_FLAG_I_STEREO, MAD_FLAG_LSF_EXT, MAD_FLAG_PROTECTION, MAD_MODE_JOINT_STEREO, MAD_NCHANNELS, MAD_OPTION_IGNORECRC, mad_header::mode, mad_header::mode_extension, nbal, offset_table, offsets, mad_frame::options, mad_stream::ptr, qc_table, s, mad_header::samplerate, sblimit, sbquant_table, mad_frame::sbsample, and sf_table.

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Variable Documentation

struct { ... } bitalloc_table[8] [static]

Referenced by mad_layer_II().

unsigned { ... } nbal [inherited]

Definition at line 252 of file layer12.c.

unsigned { ... } offset [inherited]

Definition at line 253 of file layer12.c.

unsigned char const offset_table[6][15] [static]

Initial value:

 {
  { 0, 1, 16                                             },  
  { 0, 1,  2, 3, 4, 5, 16                                },  
  { 0, 1,  2, 3, 4, 5,  6, 7,  8,  9, 10, 11, 12, 13, 14 },  
  { 0, 1,  3, 4, 5, 6,  7, 8,  9, 10, 11, 12, 13, 14, 15 },  
  { 0, 1,  2, 3, 4, 5,  6, 7,  8,  9, 10, 11, 12, 13, 16 },  
  { 0, 2,  4, 5, 6, 7,  8, 9, 10, 11, 12, 13, 14, 15, 16 }   
}

offsets into quantization class table

Definition at line 267 of file layer12.c.

Referenced by mad_layer_II().

unsigned { ... } offsets[30] [inherited]

Definition at line 232 of file layer12.c.

struct quantclass qc_table[17] [static]

Referenced by mad_layer_II().

unsigned { ... } sblimit [inherited]

Definition at line 231 of file layer12.c.

struct { ... } sbquant_table[5] [static]

Referenced by mad_layer_II().