/*////////////////////////////////////////////////////////////////////////// */ /* **** 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 /* This header file contains all the definitions required by WavPack. */ #ifdef __BORLANDC__ typedef unsigned long uint32_t; typedef long int32_t; #elif defined(_WIN32) && !defined(__MINGW32__) #include typedef unsigned __int64 uint64_t; typedef unsigned __int32 uint32_t; typedef __int64 int64_t; typedef __int32 int32_t; #else #include #endif typedef unsigned char uchar; #if !defined(__GNUC__) || defined(WIN32) typedef unsigned short ushort; typedef unsigned int uint; #endif #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]; uint32_t ckSize; short version; uchar track_no, index_no; uint32_t 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 FALSE_STEREO 0x40000000 /* block is stereo, but data is mono */ #define IGNORED_FLAGS 0x18000000 /* reserved, but ignore if encountered */ #define NEW_SHAPING 0x20000000 /* use IIR filter for negative shaping */ #define UNKNOWN_FLAGS 0x80000000 /* also reserved, but refuse decode if */ /* encountered */ #define MONO_DATA (MONO_FLAG | FALSE_STEREO) #define MIN_STREAM_VERS 0x402 /* lowest stream version we'll decode */ #define MAX_STREAM_VERS 0x410 /* highest stream version we'll decode */ /*////////////////////////// WavPack Metadata ///////////////////////////////// */ /* This is an internal representation of metadata. */ typedef struct { int32_t 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 num_channels, float_norm_exp; uint32_t 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_FAST_FLAG 0x200 /* fast mode */ #define CONFIG_HIGH_FLAG 0x800 /* high quality mode */ #define CONFIG_VERY_HIGH_FLAG 0x1000 /* very high */ #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_CREATE_EXE 0x40000 /* create executable */ #define CONFIG_CREATE_WVC 0x80000 /* create correction file */ #define CONFIG_OPTIMIZE_WVC 0x100000 /* maximize bybrid compression */ #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_OPTIMIZE_MONO 0x80000000 /* optimize for mono streams posing as stereo */ /*////////////////////////////// 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 int32_t (*read_stream)(void *, int32_t); typedef struct bs { uchar *buf, *end, *ptr; void (*wrap)(struct bs *bs); uint32_t 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; int32_t samples_A [MAX_TERM], samples_B [MAX_TERM]; }; struct entropy_data { uint32_t median [3], slow_level, error_limit; }; struct words_data { uint32_t bitrate_delta [2], bitrate_acc [2]; uint32_t pend_data, holding_one, zeros_acc; int holding_zero, pend_count; struct entropy_data c [2]; }; typedef struct { WavpackHeader wphdr; Bitstream wvbits; struct words_data w; int num_terms, mute_error; uint32_t sample_index, crc; 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]; } 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; uint32_t 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, uint32_t 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 |= (int32_t)*((bs)->ptr) << (bs)->bc; \ (bs)->bc += 8; \ } \ *(value) = (bs)->sr; \ if ((bs)->bc > 32) { \ (bs)->bc -= (nbits); \ (bs)->sr = *((bs)->ptr) >> (8 - (bs)->bc); \ } \ else { \ (bs)->bc -= (nbits); \ (bs)->sr >>= (nbits); \ } \ } void little_endian_to_native (void *data, char *format); void native_to_little_endian (void *data, char *format); /* These macros implement the weight application and update operations */ /* that are at the heart of the decorrelation loops. Note that when there */ /* are several alternative versions of the same macro (marked with PERFCOND) */ /* then the versions are functionally equivalent with respect to WavPack */ /* decoding and the user should choose the one that provides the best */ /* performance. This may be easier to check when NOT using the assembly */ /* language optimizations. */ #if 1 /* PERFCOND */ #define apply_weight_i(weight, sample) ((weight * sample + 512) >> 10) #else #define apply_weight_i(weight, sample) ((((weight * sample) >> 8) + 2) >> 2) #endif #define apply_weight_f(weight, sample) (((((sample & 0xffffL) * weight) >> 9) + \ (((sample & ~0xffffL) >> 9) * weight) + 1) >> 1) #if 1 /* PERFCOND */ #define apply_weight(weight, sample) (sample != (short) sample ? \ apply_weight_f (weight, sample) : apply_weight_i (weight, sample)) #else #define apply_weight(weight, sample) ((int32_t)((weight * (int64_t) sample + 512) >> 10)) #endif #if 0 /* PERFCOND */ #define update_weight(weight, delta, source, result) \ if (source && result) { int32_t s = (int32_t) (source ^ result) >> 31; weight = (delta ^ s) + (weight - s); } #elif 1 #define update_weight(weight, delta, source, result) \ if (source && result) weight += (((source ^ result) >> 30) | 1) * delta #else #define update_weight(weight, delta, source, result) \ if (source && result) (source ^ result) < 0 ? (weight -= delta) : (weight += delta) #endif #define update_weight_clip(weight, delta, source, result) \ if (source && result && ((source ^ result) < 0 ? (weight -= delta) < -1024 : (weight += delta) > 1024)) \ weight = weight < 0 ? -1024 : 1024 /* 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); int32_t unpack_samples (WavpackContext *wpc, int32_t *buffer, uint32_t 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); int32_t get_words (int32_t *buffer, int nsamples, uint32_t flags, struct words_data *w, Bitstream *bs); int32_t exp2s (int log); int restore_weight (signed char weight); #define WORD_EOF (1L << 31) /* float.c */ int read_float_info (WavpackStream *wps, WavpackMetadata *wpmd); void float_values (WavpackStream *wps, int32_t *values, int32_t num_values); /* 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 uint32_t WavpackUnpackSamples (WavpackContext *wpc, int32_t *buffer, uint32_t samples); uint32_t WavpackGetNumSamples (WavpackContext *wpc); uint32_t WavpackGetSampleIndex (WavpackContext *wpc); int WavpackGetNumErrors (WavpackContext *wpc); int WavpackLossyBlocks (WavpackContext *wpc); uint32_t WavpackGetSampleRate (WavpackContext *wpc); int WavpackGetBitsPerSample (WavpackContext *wpc); int WavpackGetBytesPerSample (WavpackContext *wpc); int WavpackGetNumChannels (WavpackContext *wpc); int WavpackGetReducedChannels (WavpackContext *wpc);