//////////////////////////////////////////////////////////////////////////// // **** 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 // 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 #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);