b363d65625
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6086 a1c6a512-1295-4272-9138-f99709370657
329 lines
11 KiB
C
329 lines
11 KiB
C
////////////////////////////////////////////////////////////////////////////
|
|
// **** WAVPACK **** //
|
|
// Hybrid Lossless Wavefile Compressor //
|
|
// Copyright (c) 1998 - 2004 Conifer Software. //
|
|
// All Rights Reserved. //
|
|
// Distributed under the BSD Software License (see license.txt) //
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
// wavpack.h
|
|
|
|
#include "../codec.h"
|
|
|
|
#include <inttypes.h>
|
|
|
|
// This header file contains all the definitions required by WavPack.
|
|
|
|
// not sure about them.. testing will bring more light into it..
|
|
typedef unsigned char uchar;
|
|
typedef unsigned short ushort;
|
|
typedef unsigned long ulong;
|
|
typedef unsigned int uint;
|
|
|
|
// This structure is used to access the individual fields of 32-bit ieee
|
|
// floating point numbers. This will not be compatible with compilers that
|
|
// allocate bit fields from the most significant bits, although I'm not sure
|
|
// how common that is.
|
|
|
|
typedef struct {
|
|
unsigned mantissa : 23;
|
|
unsigned exponent : 8;
|
|
unsigned sign : 1;
|
|
} f32;
|
|
|
|
#include <stdio.h>
|
|
|
|
#define FALSE 0
|
|
#define TRUE 1
|
|
|
|
////////////////////////////// WavPack Header /////////////////////////////////
|
|
|
|
// Note that this is the ONLY structure that is written to (or read from)
|
|
// WavPack 4.0 files, and is the preamble to every block in both the .wv
|
|
// and .wvc files.
|
|
|
|
typedef struct {
|
|
char ckID [4];
|
|
ulong ckSize;
|
|
short version;
|
|
uchar track_no, index_no;
|
|
ulong total_samples, block_index, block_samples, flags, crc;
|
|
} WavpackHeader;
|
|
|
|
#define WavpackHeaderFormat "4LS2LLLLL"
|
|
|
|
// or-values for "flags"
|
|
|
|
#define BYTES_STORED 3 // 1-4 bytes/sample
|
|
#define MONO_FLAG 4 // not stereo
|
|
#define HYBRID_FLAG 8 // hybrid mode
|
|
#define JOINT_STEREO 0x10 // joint stereo
|
|
#define CROSS_DECORR 0x20 // no-delay cross decorrelation
|
|
#define HYBRID_SHAPE 0x40 // noise shape (hybrid mode only)
|
|
#define FLOAT_DATA 0x80 // ieee 32-bit floating point data
|
|
|
|
#define INT32_DATA 0x100 // special extended int handling
|
|
#define HYBRID_BITRATE 0x200 // bitrate noise (hybrid mode only)
|
|
#define HYBRID_BALANCE 0x400 // balance noise (hybrid stereo mode only)
|
|
|
|
#define INITIAL_BLOCK 0x800 // initial block of multichannel segment
|
|
#define FINAL_BLOCK 0x1000 // final block of multichannel segment
|
|
|
|
#define SHIFT_LSB 13
|
|
#define SHIFT_MASK (0x1fL << SHIFT_LSB)
|
|
|
|
#define MAG_LSB 18
|
|
#define MAG_MASK (0x1fL << MAG_LSB)
|
|
|
|
#define SRATE_LSB 23
|
|
#define SRATE_MASK (0xfL << SRATE_LSB)
|
|
|
|
#define IGNORED_FLAGS 0x18000000 // reserved, but ignore if encountered
|
|
#define NEW_SHAPING 0x20000000 // use IIR filter for negative shaping
|
|
#define UNKNOWN_FLAGS 0xC0000000 // also reserved, but refuse decode if
|
|
// encountered
|
|
|
|
//////////////////////////// WavPack Metadata /////////////////////////////////
|
|
|
|
// This is an internal representation of metadata.
|
|
|
|
typedef struct {
|
|
long byte_length;
|
|
void *data;
|
|
uchar id;
|
|
} WavpackMetadata;
|
|
|
|
#define ID_OPTIONAL_DATA 0x20
|
|
#define ID_ODD_SIZE 0x40
|
|
#define ID_LARGE 0x80
|
|
|
|
#define ID_DUMMY 0x0
|
|
#define ID_ENCODER_INFO 0x1
|
|
#define ID_DECORR_TERMS 0x2
|
|
#define ID_DECORR_WEIGHTS 0x3
|
|
#define ID_DECORR_SAMPLES 0x4
|
|
#define ID_ENTROPY_VARS 0x5
|
|
#define ID_HYBRID_PROFILE 0x6
|
|
#define ID_SHAPING_WEIGHTS 0x7
|
|
#define ID_FLOAT_INFO 0x8
|
|
#define ID_INT32_INFO 0x9
|
|
#define ID_WV_BITSTREAM 0xa
|
|
#define ID_WVC_BITSTREAM 0xb
|
|
#define ID_WVX_BITSTREAM 0xc
|
|
#define ID_CHANNEL_INFO 0xd
|
|
|
|
#define ID_RIFF_HEADER (ID_OPTIONAL_DATA | 0x1)
|
|
#define ID_RIFF_TRAILER (ID_OPTIONAL_DATA | 0x2)
|
|
#define ID_REPLAY_GAIN (ID_OPTIONAL_DATA | 0x3)
|
|
#define ID_CUESHEET (ID_OPTIONAL_DATA | 0x4)
|
|
#define ID_CONFIG_BLOCK (ID_OPTIONAL_DATA | 0x5)
|
|
#define ID_MD5_CHECKSUM (ID_OPTIONAL_DATA | 0x6)
|
|
|
|
///////////////////////// WavPack Configuration ///////////////////////////////
|
|
|
|
// This internal structure is used during encode to provide configuration to
|
|
// the encoding engine and during decoding to provide fle information back to
|
|
// the higher level functions. Not all fields are used in both modes.
|
|
|
|
typedef struct {
|
|
int bits_per_sample, bytes_per_sample;
|
|
int qmode, flags, xmode, num_channels, float_norm_exp;
|
|
long block_samples, extra_flags, sample_rate, channel_mask;
|
|
} WavpackConfig;
|
|
|
|
#define CONFIG_BYTES_STORED 3 // 1-4 bytes/sample
|
|
#define CONFIG_MONO_FLAG 4 // not stereo
|
|
#define CONFIG_HYBRID_FLAG 8 // hybrid mode
|
|
#define CONFIG_JOINT_STEREO 0x10 // joint stereo
|
|
#define CONFIG_CROSS_DECORR 0x20 // no-delay cross decorrelation
|
|
#define CONFIG_HYBRID_SHAPE 0x40 // noise shape (hybrid mode only)
|
|
#define CONFIG_FLOAT_DATA 0x80 // ieee 32-bit floating point data
|
|
|
|
#define CONFIG_ADOBE_MODE 0x100 // "adobe" mode for 32-bit floats
|
|
#define CONFIG_FAST_FLAG 0x200 // fast mode
|
|
#define CONFIG_VERY_FAST_FLAG 0x400 // double fast
|
|
#define CONFIG_HIGH_FLAG 0x800 // high quality mode
|
|
#define CONFIG_VERY_HIGH_FLAG 0x1000 // double high (not used yet)
|
|
#define CONFIG_BITRATE_KBPS 0x2000 // bitrate is kbps, not bits / sample
|
|
#define CONFIG_AUTO_SHAPING 0x4000 // automatic noise shaping
|
|
#define CONFIG_SHAPE_OVERRIDE 0x8000 // shaping mode specified
|
|
#define CONFIG_JOINT_OVERRIDE 0x10000 // joint-stereo mode specified
|
|
#define CONFIG_COPY_TIME 0x20000 // copy file-time from source
|
|
#define CONFIG_CREATE_EXE 0x40000 // create executable (not yet)
|
|
#define CONFIG_CREATE_WVC 0x80000 // create correction file
|
|
#define CONFIG_OPTIMIZE_WVC 0x100000 // maximize bybrid compression
|
|
#define CONFIG_QUALITY_MODE 0x200000 // psychoacoustic quality mode
|
|
#define CONFIG_RAW_FLAG 0x400000 // raw mode (not implemented yet)
|
|
#define CONFIG_CALC_NOISE 0x800000 // calc noise in hybrid mode
|
|
#define CONFIG_LOSSY_MODE 0x1000000 // obsolete (for information)
|
|
#define CONFIG_EXTRA_MODE 0x2000000 // extra processing mode
|
|
#define CONFIG_SKIP_WVX 0x4000000 // no wvx stream w/ floats & big ints
|
|
#define CONFIG_MD5_CHECKSUM 0x8000000 // compute & store MD5 signature
|
|
#define CONFIG_QUIET_MODE 0x10000000 // don't report progress %
|
|
|
|
//////////////////////////////// WavPack Stream ///////////////////////////////
|
|
|
|
// This internal structure contains everything required to handle a WavPack
|
|
// "stream", which is defined as a stereo or mono stream of audio samples. For
|
|
// multichannel audio several of these would be required. Each stream contains
|
|
// pointers to hold a complete allocated block of WavPack data, although it's
|
|
// possible to decode WavPack blocks without buffering an entire block.
|
|
|
|
typedef long (*read_stream)(void *, long);
|
|
|
|
typedef struct bs {
|
|
uchar *buf, *end, *ptr;
|
|
void (*wrap)(struct bs *bs);
|
|
ulong file_bytes, sr;
|
|
int error, bc;
|
|
read_stream file;
|
|
} Bitstream;
|
|
|
|
#define MAX_NTERMS 16
|
|
#define MAX_TERM 8
|
|
|
|
struct decorr_pass {
|
|
short term, delta, weight_A, weight_B;
|
|
long samples_A [MAX_TERM], samples_B [MAX_TERM];
|
|
};
|
|
|
|
typedef struct {
|
|
WavpackHeader wphdr;
|
|
|
|
int num_terms, mute_error;
|
|
ulong sample_index, crc;
|
|
Bitstream wvbits;
|
|
|
|
uchar int32_sent_bits, int32_zeros, int32_ones, int32_dups;
|
|
uchar float_flags, float_shift, float_max_exp, float_norm_exp;
|
|
|
|
struct decorr_pass decorr_passes [MAX_NTERMS];
|
|
|
|
struct {
|
|
ulong bitrate_delta [2], bitrate_acc [2];
|
|
ulong median [3] [2], slow_level [2], error_limit [2];
|
|
ulong pend_data, holding_one, zeros_acc;
|
|
int holding_zero, pend_count;
|
|
} w;
|
|
} WavpackStream;
|
|
|
|
// flags for float_flags:
|
|
|
|
#define FLOAT_SHIFT_ONES 1 // bits left-shifted into float = '1'
|
|
#define FLOAT_SHIFT_SAME 2 // bits left-shifted into float are the same
|
|
#define FLOAT_SHIFT_SENT 4 // bits shifted into float are sent literally
|
|
#define FLOAT_ZEROS_SENT 8 // "zeros" are not all real zeros
|
|
#define FLOAT_NEG_ZEROS 0x10 // contains negative zeros
|
|
#define FLOAT_EXCEPTIONS 0x20 // contains exceptions (inf, nan, etc.)
|
|
|
|
/////////////////////////////// WavPack Context ///////////////////////////////
|
|
|
|
// This internal structure holds everything required to encode or decode WavPack
|
|
// files. It is recommended that direct access to this structure be minimized
|
|
// and the provided utilities used instead.
|
|
|
|
typedef struct {
|
|
WavpackConfig config;
|
|
WavpackStream stream;
|
|
|
|
uchar read_buffer [1024];
|
|
char error_message [80];
|
|
|
|
read_stream infile;
|
|
ulong total_samples, crc_errors, first_flags;
|
|
int open_flags, norm_offset, reduced_channels, lossy_blocks;
|
|
|
|
} WavpackContext;
|
|
|
|
//////////////////////// function prototypes and macros //////////////////////
|
|
|
|
#define CLEAR(destin) memset (&destin, 0, sizeof (destin));
|
|
|
|
// bits.c
|
|
|
|
void bs_open_read (Bitstream *bs, uchar *buffer_start, uchar *buffer_end, read_stream file, ulong file_bytes);
|
|
|
|
#define bs_is_open(bs) ((bs)->ptr != NULL)
|
|
|
|
#define getbit(bs) ( \
|
|
(((bs)->bc) ? \
|
|
((bs)->bc--, (bs)->sr & 1) : \
|
|
(((++((bs)->ptr) != (bs)->end) ? (void) 0 : (bs)->wrap (bs)), (bs)->bc = 7, ((bs)->sr = *((bs)->ptr)) & 1) \
|
|
) ? \
|
|
((bs)->sr >>= 1, 1) : \
|
|
((bs)->sr >>= 1, 0) \
|
|
)
|
|
|
|
#define getbits(value, nbits, bs) { \
|
|
while ((nbits) > (bs)->bc) { \
|
|
if (++((bs)->ptr) == (bs)->end) (bs)->wrap (bs); \
|
|
(bs)->sr |= (long)*((bs)->ptr) << (bs)->bc; \
|
|
(bs)->bc += 8; \
|
|
} \
|
|
*(value) = (bs)->sr; \
|
|
(bs)->sr >>= (nbits); \
|
|
(bs)->bc -= (nbits); \
|
|
}
|
|
|
|
void little_endian_to_native (void *data, char *format);
|
|
void native_to_little_endian (void *data, char *format);
|
|
|
|
// unpack.c
|
|
|
|
int unpack_init (WavpackContext *wpc);
|
|
int init_wv_bitstream (WavpackContext *wpc, WavpackMetadata *wpmd);
|
|
int read_decorr_terms (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_decorr_weights (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_decorr_samples (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_float_info (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_int32_info (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_channel_info (WavpackContext *wpc, WavpackMetadata *wpmd);
|
|
int read_config_info (WavpackContext *wpc, WavpackMetadata *wpmd);
|
|
long unpack_samples (WavpackContext *wpc, long *buffer, ulong sample_count);
|
|
int check_crc_error (WavpackContext *wpc);
|
|
|
|
// metadata.c stuff
|
|
|
|
int read_metadata_buff (WavpackContext *wpc, WavpackMetadata *wpmd);
|
|
int process_metadata (WavpackContext *wpc, WavpackMetadata *wpmd);
|
|
|
|
// words.c stuff
|
|
|
|
int read_entropy_vars (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
int read_hybrid_profile (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
long get_word (WavpackStream *wps, int chan);
|
|
long exp2s (int log);
|
|
int restore_weight (char weight);
|
|
|
|
#define WORD_EOF (1L << 31)
|
|
|
|
// float.c
|
|
|
|
int read_float_info (WavpackStream *wps, WavpackMetadata *wpmd);
|
|
void float_values (WavpackStream *wps, long *values, long num_values);
|
|
void float_normalize (long *values, long num_values, int delta_exp);
|
|
|
|
// wputils.c
|
|
|
|
WavpackContext *WavpackOpenFileInput (read_stream infile, char *error);
|
|
|
|
int WavpackGetMode (WavpackContext *wpc);
|
|
|
|
#define MODE_WVC 0x1
|
|
#define MODE_LOSSLESS 0x2
|
|
#define MODE_HYBRID 0x4
|
|
#define MODE_FLOAT 0x8
|
|
#define MODE_VALID_TAG 0x10
|
|
#define MODE_HIGH 0x20
|
|
#define MODE_FAST 0x40
|
|
|
|
ulong WavpackUnpackSamples (WavpackContext *wpc, long *buffer, ulong samples);
|
|
ulong WavpackGetNumSamples (WavpackContext *wpc);
|
|
ulong WavpackGetSampleIndex (WavpackContext *wpc);
|
|
int WavpackGetNumErrors (WavpackContext *wpc);
|
|
int WavpackLossyBlocks (WavpackContext *wpc);
|
|
ulong WavpackGetSampleRate (WavpackContext *wpc);
|
|
int WavpackGetBitsPerSample (WavpackContext *wpc);
|
|
int WavpackGetBytesPerSample (WavpackContext *wpc);
|
|
int WavpackGetNumChannels (WavpackContext *wpc);
|
|
int WavpackGetReducedChannels (WavpackContext *wpc);
|