/* ** Copyright (C) 1999-2016 Erik de Castro Lopo ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU Lesser General Public License as published by ** the Free Software Foundation; either version 2.1 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU Lesser General Public License for more details. ** ** You should have received a copy of the GNU Lesser General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* ** sndfile.h -- system-wide definitions ** ** API documentation is in the doc/ directory of the source code tarball ** and at http://libsndfile.github.io/libsndfile/api.html. */ #ifndef SNDFILE_H #define SNDFILE_H /* This is the version 1.0.X header file. */ #define SNDFILE_1 #include #include #include #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* The following file types can be read and written. ** A file type would consist of a major type (ie SF_FORMAT_WAV) bitwise ** ORed with a minor type (ie SF_FORMAT_PCM). SF_FORMAT_TYPEMASK and ** SF_FORMAT_SUBMASK can be used to separate the major and minor file ** types. */ enum { /* Major formats. */ SF_FORMAT_WAV = 0x010000, /* Microsoft WAV format (little endian default). */ SF_FORMAT_AIFF = 0x020000, /* Apple/SGI AIFF format (big endian). */ SF_FORMAT_AU = 0x030000, /* Sun/NeXT AU format (big endian). */ SF_FORMAT_RAW = 0x040000, /* RAW PCM data. */ SF_FORMAT_PAF = 0x050000, /* Ensoniq PARIS file format. */ SF_FORMAT_SVX = 0x060000, /* Amiga IFF / SVX8 / SV16 format. */ SF_FORMAT_NIST = 0x070000, /* Sphere NIST format. */ SF_FORMAT_VOC = 0x080000, /* VOC files. */ SF_FORMAT_IRCAM = 0x0A0000, /* Berkeley/IRCAM/CARL */ SF_FORMAT_W64 = 0x0B0000, /* Sonic Foundry's 64 bit RIFF/WAV */ SF_FORMAT_MAT4 = 0x0C0000, /* Matlab (tm) V4.2 / GNU Octave 2.0 */ SF_FORMAT_MAT5 = 0x0D0000, /* Matlab (tm) V5.0 / GNU Octave 2.1 */ SF_FORMAT_PVF = 0x0E0000, /* Portable Voice Format */ SF_FORMAT_XI = 0x0F0000, /* Fasttracker 2 Extended Instrument */ SF_FORMAT_HTK = 0x100000, /* HMM Tool Kit format */ SF_FORMAT_SDS = 0x110000, /* Midi Sample Dump Standard */ SF_FORMAT_AVR = 0x120000, /* Audio Visual Research */ SF_FORMAT_WAVEX = 0x130000, /* MS WAVE with WAVEFORMATEX */ SF_FORMAT_SD2 = 0x160000, /* Sound Designer 2 */ SF_FORMAT_FLAC = 0x170000, /* FLAC lossless file format */ SF_FORMAT_CAF = 0x180000, /* Core Audio File format */ SF_FORMAT_WVE = 0x190000, /* Psion WVE format */ SF_FORMAT_OGG = 0x200000, /* Xiph OGG container */ SF_FORMAT_MPC2K = 0x210000, /* Akai MPC 2000 sampler */ SF_FORMAT_RF64 = 0x220000, /* RF64 WAV file */ /* Subtypes from here on. */ SF_FORMAT_PCM_S8 = 0x0001, /* Signed 8 bit data */ SF_FORMAT_PCM_16 = 0x0002, /* Signed 16 bit data */ SF_FORMAT_PCM_24 = 0x0003, /* Signed 24 bit data */ SF_FORMAT_PCM_32 = 0x0004, /* Signed 32 bit data */ SF_FORMAT_PCM_U8 = 0x0005, /* Unsigned 8 bit data (WAV and RAW only) */ SF_FORMAT_FLOAT = 0x0006, /* 32 bit float data */ SF_FORMAT_DOUBLE = 0x0007, /* 64 bit float data */ SF_FORMAT_ULAW = 0x0010, /* U-Law encoded. */ SF_FORMAT_ALAW = 0x0011, /* A-Law encoded. */ SF_FORMAT_IMA_ADPCM = 0x0012, /* IMA ADPCM. */ SF_FORMAT_MS_ADPCM = 0x0013, /* Microsoft ADPCM. */ SF_FORMAT_GSM610 = 0x0020, /* GSM 6.10 encoding. */ SF_FORMAT_VOX_ADPCM = 0x0021, /* OKI / Dialogix ADPCM */ SF_FORMAT_NMS_ADPCM_16 = 0x0022, /* 16kbs NMS G721-variant encoding. */ SF_FORMAT_NMS_ADPCM_24 = 0x0023, /* 24kbs NMS G721-variant encoding. */ SF_FORMAT_NMS_ADPCM_32 = 0x0024, /* 32kbs NMS G721-variant encoding. */ SF_FORMAT_G721_32 = 0x0030, /* 32kbs G721 ADPCM encoding. */ SF_FORMAT_G723_24 = 0x0031, /* 24kbs G723 ADPCM encoding. */ SF_FORMAT_G723_40 = 0x0032, /* 40kbs G723 ADPCM encoding. */ SF_FORMAT_DWVW_12 = 0x0040, /* 12 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_16 = 0x0041, /* 16 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_24 = 0x0042, /* 24 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_N = 0x0043, /* N bit Delta Width Variable Word encoding. */ SF_FORMAT_DPCM_8 = 0x0050, /* 8 bit differential PCM (XI only) */ SF_FORMAT_DPCM_16 = 0x0051, /* 16 bit differential PCM (XI only) */ SF_FORMAT_VORBIS = 0x0060, /* Xiph Vorbis encoding. */ SF_FORMAT_OPUS = 0x0064, /* Xiph/Skype Opus encoding. */ SF_FORMAT_ALAC_16 = 0x0070, /* Apple Lossless Audio Codec (16 bit). */ SF_FORMAT_ALAC_20 = 0x0071, /* Apple Lossless Audio Codec (20 bit). */ SF_FORMAT_ALAC_24 = 0x0072, /* Apple Lossless Audio Codec (24 bit). */ SF_FORMAT_ALAC_32 = 0x0073, /* Apple Lossless Audio Codec (32 bit). */ /* Endian-ness options. */ SF_ENDIAN_FILE = 0x00000000, /* Default file endian-ness. */ SF_ENDIAN_LITTLE = 0x10000000, /* Force little endian-ness. */ SF_ENDIAN_BIG = 0x20000000, /* Force big endian-ness. */ SF_ENDIAN_CPU = 0x30000000, /* Force CPU endian-ness. */ SF_FORMAT_SUBMASK = 0x0000FFFF, SF_FORMAT_TYPEMASK = 0x0FFF0000, SF_FORMAT_ENDMASK = 0x30000000 } ; /* ** The following are the valid command numbers for the sf_command() ** interface. The use of these commands is documented in the file ** command.html in the doc directory of the source code distribution. */ enum { SFC_GET_LIB_VERSION = 0x1000, SFC_GET_LOG_INFO = 0x1001, SFC_GET_CURRENT_SF_INFO = 0x1002, SFC_GET_NORM_DOUBLE = 0x1010, SFC_GET_NORM_FLOAT = 0x1011, SFC_SET_NORM_DOUBLE = 0x1012, SFC_SET_NORM_FLOAT = 0x1013, SFC_SET_SCALE_FLOAT_INT_READ = 0x1014, SFC_SET_SCALE_INT_FLOAT_WRITE = 0x1015, SFC_GET_SIMPLE_FORMAT_COUNT = 0x1020, SFC_GET_SIMPLE_FORMAT = 0x1021, SFC_GET_FORMAT_INFO = 0x1028, SFC_GET_FORMAT_MAJOR_COUNT = 0x1030, SFC_GET_FORMAT_MAJOR = 0x1031, SFC_GET_FORMAT_SUBTYPE_COUNT = 0x1032, SFC_GET_FORMAT_SUBTYPE = 0x1033, SFC_CALC_SIGNAL_MAX = 0x1040, SFC_CALC_NORM_SIGNAL_MAX = 0x1041, SFC_CALC_MAX_ALL_CHANNELS = 0x1042, SFC_CALC_NORM_MAX_ALL_CHANNELS = 0x1043, SFC_GET_SIGNAL_MAX = 0x1044, SFC_GET_MAX_ALL_CHANNELS = 0x1045, SFC_SET_ADD_PEAK_CHUNK = 0x1050, SFC_UPDATE_HEADER_NOW = 0x1060, SFC_SET_UPDATE_HEADER_AUTO = 0x1061, SFC_FILE_TRUNCATE = 0x1080, SFC_SET_RAW_START_OFFSET = 0x1090, SFC_SET_DITHER_ON_WRITE = 0x10A0, SFC_SET_DITHER_ON_READ = 0x10A1, SFC_GET_DITHER_INFO_COUNT = 0x10A2, SFC_GET_DITHER_INFO = 0x10A3, SFC_GET_EMBED_FILE_INFO = 0x10B0, SFC_SET_CLIPPING = 0x10C0, SFC_GET_CLIPPING = 0x10C1, SFC_GET_CUE_COUNT = 0x10CD, SFC_GET_CUE = 0x10CE, SFC_SET_CUE = 0x10CF, SFC_GET_INSTRUMENT = 0x10D0, SFC_SET_INSTRUMENT = 0x10D1, SFC_GET_LOOP_INFO = 0x10E0, SFC_GET_BROADCAST_INFO = 0x10F0, SFC_SET_BROADCAST_INFO = 0x10F1, SFC_GET_CHANNEL_MAP_INFO = 0x1100, SFC_SET_CHANNEL_MAP_INFO = 0x1101, SFC_RAW_DATA_NEEDS_ENDSWAP = 0x1110, /* Support for Wavex Ambisonics Format */ SFC_WAVEX_SET_AMBISONIC = 0x1200, SFC_WAVEX_GET_AMBISONIC = 0x1201, /* ** RF64 files can be set so that on-close, writable files that have less ** than 4GB of data in them are converted to RIFF/WAV, as per EBU ** recommendations. */ SFC_RF64_AUTO_DOWNGRADE = 0x1210, SFC_SET_VBR_ENCODING_QUALITY = 0x1300, SFC_SET_COMPRESSION_LEVEL = 0x1301, SFC_SET_OGG_PAGE_LATENCY_MS = 0x1302, SFC_SET_OGG_PAGE_LATENCY = 0x1303, /* Cart Chunk support */ SFC_SET_CART_INFO = 0x1400, SFC_GET_CART_INFO = 0x1401, /* Opus files original samplerate metadata */ SFC_SET_ORIGINAL_SAMPLERATE = 0x1500, SFC_GET_ORIGINAL_SAMPLERATE = 0x1501, /* Following commands for testing only. */ SFC_TEST_IEEE_FLOAT_REPLACE = 0x6001, /* ** These SFC_SET_ADD_* values are deprecated and will disappear at some ** time in the future. They are guaranteed to be here up to and ** including version 1.0.8 to avoid breakage of existing software. ** They currently do nothing and will continue to do nothing. */ SFC_SET_ADD_HEADER_PAD_CHUNK = 0x1051, SFC_SET_ADD_DITHER_ON_WRITE = 0x1070, SFC_SET_ADD_DITHER_ON_READ = 0x1071 } ; /* ** String types that can be set and read from files. Not all file types ** support this and even the file types which support one, may not support ** all string types. */ enum { SF_STR_TITLE = 0x01, SF_STR_COPYRIGHT = 0x02, SF_STR_SOFTWARE = 0x03, SF_STR_ARTIST = 0x04, SF_STR_COMMENT = 0x05, SF_STR_DATE = 0x06, SF_STR_ALBUM = 0x07, SF_STR_LICENSE = 0x08, SF_STR_TRACKNUMBER = 0x09, SF_STR_GENRE = 0x10 } ; /* ** Use the following as the start and end index when doing metadata ** transcoding. */ #define SF_STR_FIRST SF_STR_TITLE #define SF_STR_LAST SF_STR_GENRE enum { /* True and false */ SF_FALSE = 0, SF_TRUE = 1, /* Modes for opening files. */ SFM_READ = 0x10, SFM_WRITE = 0x20, SFM_RDWR = 0x30, SF_AMBISONIC_NONE = 0x40, SF_AMBISONIC_B_FORMAT = 0x41 } ; /* Public error values. These are guaranteed to remain unchanged for the duration ** of the library major version number. ** There are also a large number of private error numbers which are internal to ** the library which can change at any time. */ enum { SF_ERR_NO_ERROR = 0, SF_ERR_UNRECOGNISED_FORMAT = 1, SF_ERR_SYSTEM = 2, SF_ERR_MALFORMED_FILE = 3, SF_ERR_UNSUPPORTED_ENCODING = 4 } ; /* Channel map values (used with SFC_SET/GET_CHANNEL_MAP). */ enum { SF_CHANNEL_MAP_INVALID = 0, SF_CHANNEL_MAP_MONO = 1, SF_CHANNEL_MAP_LEFT, /* Apple calls this 'Left' */ SF_CHANNEL_MAP_RIGHT, /* Apple calls this 'Right' */ SF_CHANNEL_MAP_CENTER, /* Apple calls this 'Center' */ SF_CHANNEL_MAP_FRONT_LEFT, SF_CHANNEL_MAP_FRONT_RIGHT, SF_CHANNEL_MAP_FRONT_CENTER, SF_CHANNEL_MAP_REAR_CENTER, /* Apple calls this 'Center Surround', Msft calls this 'Back Center' */ SF_CHANNEL_MAP_REAR_LEFT, /* Apple calls this 'Left Surround', Msft calls this 'Back Left' */ SF_CHANNEL_MAP_REAR_RIGHT, /* Apple calls this 'Right Surround', Msft calls this 'Back Right' */ SF_CHANNEL_MAP_LFE, /* Apple calls this 'LFEScreen', Msft calls this 'Low Frequency' */ SF_CHANNEL_MAP_FRONT_LEFT_OF_CENTER, /* Apple calls this 'Left Center' */ SF_CHANNEL_MAP_FRONT_RIGHT_OF_CENTER, /* Apple calls this 'Right Center */ SF_CHANNEL_MAP_SIDE_LEFT, /* Apple calls this 'Left Surround Direct' */ SF_CHANNEL_MAP_SIDE_RIGHT, /* Apple calls this 'Right Surround Direct' */ SF_CHANNEL_MAP_TOP_CENTER, /* Apple calls this 'Top Center Surround' */ SF_CHANNEL_MAP_TOP_FRONT_LEFT, /* Apple calls this 'Vertical Height Left' */ SF_CHANNEL_MAP_TOP_FRONT_RIGHT, /* Apple calls this 'Vertical Height Right' */ SF_CHANNEL_MAP_TOP_FRONT_CENTER, /* Apple calls this 'Vertical Height Center' */ SF_CHANNEL_MAP_TOP_REAR_LEFT, /* Apple and MS call this 'Top Back Left' */ SF_CHANNEL_MAP_TOP_REAR_RIGHT, /* Apple and MS call this 'Top Back Right' */ SF_CHANNEL_MAP_TOP_REAR_CENTER, /* Apple and MS call this 'Top Back Center' */ SF_CHANNEL_MAP_AMBISONIC_B_W, SF_CHANNEL_MAP_AMBISONIC_B_X, SF_CHANNEL_MAP_AMBISONIC_B_Y, SF_CHANNEL_MAP_AMBISONIC_B_Z, SF_CHANNEL_MAP_MAX } ; /* A SNDFILE* pointer can be passed around much like stdio.h's FILE* pointer. */ typedef struct SNDFILE_tag SNDFILE ; /* The following typedef is system specific and is defined when libsndfile is ** compiled. sf_count_t will be a 64 bit value when the underlying OS allows ** 64 bit file offsets. ** On windows, we need to allow the same header file to be compiler by both GCC ** and the Microsoft compiler. */ typedef int64_t sf_count_t ; #ifndef SF_COUNT_MAX #define SF_COUNT_MAX 0x7FFFFFFFFFFFFFFFLL #endif /* A pointer to a SF_INFO structure is passed to sf_open () and filled in. ** On write, the SF_INFO structure is filled in by the user and passed into ** sf_open (). */ struct SF_INFO { sf_count_t frames ; /* Used to be called samples. Changed to avoid confusion. */ int samplerate ; int channels ; int format ; int sections ; int seekable ; } ; typedef struct SF_INFO SF_INFO ; /* The SF_FORMAT_INFO struct is used to retrieve information about the sound ** file formats libsndfile supports using the sf_command () interface. ** ** Using this interface will allow applications to support new file formats ** and encoding types when libsndfile is upgraded, without requiring ** re-compilation of the application. ** ** Please consult the libsndfile documentation (particularly the information ** on the sf_command () interface) for examples of its use. */ typedef struct { int format ; const char *name ; const char *extension ; } SF_FORMAT_INFO ; /* ** Enums and typedefs for adding dither on read and write. ** See the html documentation for sf_command(), SFC_SET_DITHER_ON_WRITE ** and SFC_SET_DITHER_ON_READ. */ enum { SFD_DEFAULT_LEVEL = 0, SFD_CUSTOM_LEVEL = 0x40000000, SFD_NO_DITHER = 500, SFD_WHITE = 501, SFD_TRIANGULAR_PDF = 502 } ; typedef struct { int type ; double level ; const char *name ; } SF_DITHER_INFO ; /* Struct used to retrieve information about a file embedded within a ** larger file. See SFC_GET_EMBED_FILE_INFO. */ typedef struct { sf_count_t offset ; sf_count_t length ; } SF_EMBED_FILE_INFO ; /* ** Struct used to retrieve cue marker information from a file */ typedef struct { int32_t indx ; uint32_t position ; int32_t fcc_chunk ; int32_t chunk_start ; int32_t block_start ; uint32_t sample_offset ; char name [256] ; } SF_CUE_POINT ; #define SF_CUES_VAR(count) \ struct \ { uint32_t cue_count ; \ SF_CUE_POINT cue_points [count] ; \ } typedef SF_CUES_VAR (100) SF_CUES ; /* ** Structs used to retrieve music sample information from a file. */ enum { /* ** The loop mode field in SF_INSTRUMENT will be one of the following. */ SF_LOOP_NONE = 800, SF_LOOP_FORWARD, SF_LOOP_BACKWARD, SF_LOOP_ALTERNATING } ; typedef struct { int gain ; char basenote, detune ; char velocity_lo, velocity_hi ; char key_lo, key_hi ; int loop_count ; struct { int mode ; uint32_t start ; uint32_t end ; uint32_t count ; } loops [16] ; /* make variable in a sensible way */ } SF_INSTRUMENT ; /* Struct used to retrieve loop information from a file.*/ typedef struct { short time_sig_num ; /* any positive integer > 0 */ short time_sig_den ; /* any positive power of 2 > 0 */ int loop_mode ; /* see SF_LOOP enum */ int num_beats ; /* this is NOT the amount of quarter notes !!!*/ /* a full bar of 4/4 is 4 beats */ /* a full bar of 7/8 is 7 beats */ float bpm ; /* suggestion, as it can be calculated using other fields:*/ /* file's length, file's sampleRate and our time_sig_den*/ /* -> bpms are always the amount of _quarter notes_ per minute */ int root_key ; /* MIDI note, or -1 for None */ int future [6] ; } SF_LOOP_INFO ; /* Struct used to retrieve broadcast (EBU) information from a file. ** Strongly (!) based on EBU "bext" chunk format used in Broadcast WAVE. */ #define SF_BROADCAST_INFO_VAR(coding_hist_size) \ struct \ { char description [256] ; \ char originator [32] ; \ char originator_reference [32] ; \ char origination_date [10] ; \ char origination_time [8] ; \ uint32_t time_reference_low ; \ uint32_t time_reference_high ; \ short version ; \ char umid [64] ; \ int16_t loudness_value ; \ int16_t loudness_range ; \ int16_t max_true_peak_level ; \ int16_t max_momentary_loudness ; \ int16_t max_shortterm_loudness ; \ char reserved [180] ; \ uint32_t coding_history_size ; \ char coding_history [coding_hist_size] ; \ } /* SF_BROADCAST_INFO is the above struct with coding_history field of 256 bytes. */ typedef SF_BROADCAST_INFO_VAR (256) SF_BROADCAST_INFO ; struct SF_CART_TIMER { char usage [4] ; int32_t value ; } ; typedef struct SF_CART_TIMER SF_CART_TIMER ; #define SF_CART_INFO_VAR(p_tag_text_size) \ struct \ { char version [4] ; \ char title [64] ; \ char artist [64] ; \ char cut_id [64] ; \ char client_id [64] ; \ char category [64] ; \ char classification [64] ; \ char out_cue [64] ; \ char start_date [10] ; \ char start_time [8] ; \ char end_date [10] ; \ char end_time [8] ; \ char producer_app_id [64] ; \ char producer_app_version [64] ; \ char user_def [64] ; \ int32_t level_reference ; \ SF_CART_TIMER post_timers [8] ; \ char reserved [276] ; \ char url [1024] ; \ uint32_t tag_text_size ; \ char tag_text [p_tag_text_size] ; \ } typedef SF_CART_INFO_VAR (256) SF_CART_INFO ; /* Virtual I/O functionality. */ typedef sf_count_t (*sf_vio_get_filelen) (void *user_data) ; typedef sf_count_t (*sf_vio_seek) (sf_count_t offset, int whence, void *user_data) ; typedef sf_count_t (*sf_vio_read) (void *ptr, sf_count_t count, void *user_data) ; typedef sf_count_t (*sf_vio_write) (const void *ptr, sf_count_t count, void *user_data) ; typedef sf_count_t (*sf_vio_tell) (void *user_data) ; struct SF_VIRTUAL_IO { sf_vio_get_filelen get_filelen ; sf_vio_seek seek ; sf_vio_read read ; sf_vio_write write ; sf_vio_tell tell ; } ; typedef struct SF_VIRTUAL_IO SF_VIRTUAL_IO ; /* Open the specified file for read, write or both. On error, this will ** return a NULL pointer. To find the error number, pass a NULL SNDFILE ** to sf_strerror (). ** All calls to sf_open() should be matched with a call to sf_close(). */ SNDFILE* sf_open (const char *path, int mode, SF_INFO *sfinfo) ; /* Use the existing file descriptor to create a SNDFILE object. If close_desc ** is TRUE, the file descriptor will be closed when sf_close() is called. If ** it is FALSE, the descriptor will not be closed. ** When passed a descriptor like this, the library will assume that the start ** of file header is at the current file offset. This allows sound files within ** larger container files to be read and/or written. ** On error, this will return a NULL pointer. To find the error number, pass a ** NULL SNDFILE to sf_strerror (). ** All calls to sf_open_fd() should be matched with a call to sf_close(). */ SNDFILE* sf_open_fd (int fd, int mode, SF_INFO *sfinfo, int close_desc) ; SNDFILE* sf_open_virtual (SF_VIRTUAL_IO *sfvirtual, int mode, SF_INFO *sfinfo, void *user_data) ; /* sf_error () returns a error number which can be translated to a text ** string using sf_error_number(). */ int sf_error (SNDFILE *sndfile) ; /* sf_strerror () returns to the caller a pointer to the current error message for ** the given SNDFILE. */ const char* sf_strerror (SNDFILE *sndfile) ; /* sf_error_number () allows the retrieval of the error string for each internal ** error number. ** */ const char* sf_error_number (int errnum) ; /* The following two error functions are deprecated but they will remain in the ** library for the foreseeable future. The function sf_strerror() should be used ** in their place. */ int sf_perror (SNDFILE *sndfile) ; int sf_error_str (SNDFILE *sndfile, char* str, size_t len) ; /* Allow the caller to retrieve information from or change aspects of the ** library behaviour. */ int sf_command (SNDFILE *sndfile, int command, void *data, int datasize) ; /* Return TRUE if fields of the SF_INFO struct are a valid combination of values. */ int sf_format_check (const SF_INFO *info) ; /* Seek within the waveform data chunk of the SNDFILE. sf_seek () uses ** the same values for whence (SEEK_SET, SEEK_CUR and SEEK_END) as ** stdio.h function fseek (). ** An offset of zero with whence set to SEEK_SET will position the ** read / write pointer to the first data sample. ** On success sf_seek returns the current position in (multi-channel) ** samples from the start of the file. ** Please see the libsndfile documentation for moving the read pointer ** separately from the write pointer on files open in mode SFM_RDWR. ** On error all of these functions return -1. */ enum { SF_SEEK_SET = SEEK_SET, SF_SEEK_CUR = SEEK_CUR, SF_SEEK_END = SEEK_END } ; sf_count_t sf_seek (SNDFILE *sndfile, sf_count_t frames, int whence) ; /* Functions for retrieving and setting string data within sound files. ** Not all file types support this features; AIFF and WAV do. For both ** functions, the str_type parameter must be one of the SF_STR_* values ** defined above. ** On error, sf_set_string() returns non-zero while sf_get_string() ** returns NULL. */ int sf_set_string (SNDFILE *sndfile, int str_type, const char* str) ; const char* sf_get_string (SNDFILE *sndfile, int str_type) ; /* Return the library version string. */ const char * sf_version_string (void) ; /* Return the current byterate at this point in the file. The byte rate in this ** case is the number of bytes per second of audio data. For instance, for a ** stereo, 18 bit PCM encoded file with an 16kHz sample rate, the byte rate ** would be 2 (stereo) * 2 (two bytes per sample) * 16000 => 64000 bytes/sec. ** For some file formats the returned value will be accurate and exact, for some ** it will be a close approximation, for some it will be the average bitrate for ** the whole file and for some it will be a time varying value that was accurate ** when the file was most recently read or written. ** To get the bitrate, multiple this value by 8. ** Returns -1 for unknown. */ int sf_current_byterate (SNDFILE *sndfile) ; /* Functions for reading/writing the waveform data of a sound file. */ sf_count_t sf_read_raw (SNDFILE *sndfile, void *ptr, sf_count_t bytes) ; sf_count_t sf_write_raw (SNDFILE *sndfile, const void *ptr, sf_count_t bytes) ; /* Functions for reading and writing the data chunk in terms of frames. ** The number of items actually read/written = frames * number of channels. ** sf_xxxx_raw read/writes the raw data bytes from/to the file ** sf_xxxx_short passes data in the native short format ** sf_xxxx_int passes data in the native int format ** sf_xxxx_float passes data in the native float format ** sf_xxxx_double passes data in the native double format ** All of these read/write function return number of frames read/written. */ sf_count_t sf_readf_short (SNDFILE *sndfile, short *ptr, sf_count_t frames) ; sf_count_t sf_writef_short (SNDFILE *sndfile, const short *ptr, sf_count_t frames) ; sf_count_t sf_readf_int (SNDFILE *sndfile, int *ptr, sf_count_t frames) ; sf_count_t sf_writef_int (SNDFILE *sndfile, const int *ptr, sf_count_t frames) ; sf_count_t sf_readf_float (SNDFILE *sndfile, float *ptr, sf_count_t frames) ; sf_count_t sf_writef_float (SNDFILE *sndfile, const float *ptr, sf_count_t frames) ; sf_count_t sf_readf_double (SNDFILE *sndfile, double *ptr, sf_count_t frames) ; sf_count_t sf_writef_double (SNDFILE *sndfile, const double *ptr, sf_count_t frames) ; /* Functions for reading and writing the data chunk in terms of items. ** Otherwise similar to above. ** All of these read/write function return number of items read/written. */ sf_count_t sf_read_short (SNDFILE *sndfile, short *ptr, sf_count_t items) ; sf_count_t sf_write_short (SNDFILE *sndfile, const short *ptr, sf_count_t items) ; sf_count_t sf_read_int (SNDFILE *sndfile, int *ptr, sf_count_t items) ; sf_count_t sf_write_int (SNDFILE *sndfile, const int *ptr, sf_count_t items) ; sf_count_t sf_read_float (SNDFILE *sndfile, float *ptr, sf_count_t items) ; sf_count_t sf_write_float (SNDFILE *sndfile, const float *ptr, sf_count_t items) ; sf_count_t sf_read_double (SNDFILE *sndfile, double *ptr, sf_count_t items) ; sf_count_t sf_write_double (SNDFILE *sndfile, const double *ptr, sf_count_t items) ; /* Close the SNDFILE and clean up all memory allocations associated with this ** file. ** Returns 0 on success, or an error number. */ int sf_close (SNDFILE *sndfile) ; /* If the file is opened SFM_WRITE or SFM_RDWR, call fsync() on the file ** to force the writing of data to disk. If the file is opened SFM_READ ** no action is taken. */ void sf_write_sync (SNDFILE *sndfile) ; /* The function sf_wchar_open() is Windows Only! ** Open a file passing in a Windows Unicode filename. Otherwise, this is ** the same as sf_open(). ** ** In order for this to work, you need to do the following: ** ** #include ** #define ENABLE_SNDFILE_WINDOWS_PROTOTYPES 1 ** #including */ #if (defined (ENABLE_SNDFILE_WINDOWS_PROTOTYPES) && ENABLE_SNDFILE_WINDOWS_PROTOTYPES) SNDFILE* sf_wchar_open (LPCWSTR wpath, int mode, SF_INFO *sfinfo) ; #endif /* Getting and setting of chunks from within a sound file. ** ** These functions allow the getting and setting of chunks within a sound file ** (for those formats which allow it). ** ** These functions fail safely. Specifically, they will not allow you to overwrite ** existing chunks or add extra versions of format specific reserved chunks but ** should allow you to retrieve any and all chunks (may not be implemented for ** all chunks or all file formats). */ struct SF_CHUNK_INFO { char id [64] ; /* The chunk identifier. */ unsigned id_size ; /* The size of the chunk identifier. */ unsigned datalen ; /* The size of that data. */ void *data ; /* Pointer to the data. */ } ; typedef struct SF_CHUNK_INFO SF_CHUNK_INFO ; /* Set the specified chunk info (must be done before any audio data is written ** to the file). This will fail for format specific reserved chunks. ** The chunk_info->data pointer must be valid until the file is closed. ** Returns SF_ERR_NO_ERROR on success or non-zero on failure. */ int sf_set_chunk (SNDFILE * sndfile, const SF_CHUNK_INFO * chunk_info) ; /* ** An opaque structure to an iterator over the all chunks of a given id */ typedef struct SF_CHUNK_ITERATOR SF_CHUNK_ITERATOR ; /* Get an iterator for all chunks matching chunk_info. ** The iterator will point to the first chunk matching chunk_info. ** Chunks are matching, if (chunk_info->id) matches the first ** (chunk_info->id_size) bytes of a chunk found in the SNDFILE* handle. ** If chunk_info is NULL, an iterator to all chunks in the SNDFILE* handle ** is returned. ** The values of chunk_info->datalen and chunk_info->data are ignored. ** If no matching chunks are found in the sndfile, NULL is returned. ** The returned iterator will stay valid until one of the following occurs: ** a) The sndfile is closed. ** b) A new chunk is added using sf_set_chunk(). ** c) Another chunk iterator function is called on the same SNDFILE* handle ** that causes the iterator to be modified. ** The memory for the iterator belongs to the SNDFILE* handle and is freed when ** sf_close() is called. */ SF_CHUNK_ITERATOR * sf_get_chunk_iterator (SNDFILE * sndfile, const SF_CHUNK_INFO * chunk_info) ; /* Iterate through chunks by incrementing the iterator. ** Increments the iterator and returns a handle to the new one. ** After this call, iterator will no longer be valid, and you must use the ** newly returned handle from now on. ** The returned handle can be used to access the next chunk matching ** the criteria as defined in sf_get_chunk_iterator(). ** If iterator points to the last chunk, this will free all resources ** associated with iterator and return NULL. ** The returned iterator will stay valid until sf_get_chunk_iterator_next ** is called again, the sndfile is closed or a new chunk us added. */ SF_CHUNK_ITERATOR * sf_next_chunk_iterator (SF_CHUNK_ITERATOR * iterator) ; /* Get the size of the specified chunk. ** If the specified chunk exists, the size will be returned in the ** datalen field of the SF_CHUNK_INFO struct. ** Additionally, the id of the chunk will be copied to the id ** field of the SF_CHUNK_INFO struct and it's id_size field will ** be updated accordingly. ** If the chunk doesn't exist chunk_info->datalen will be zero, and the ** id and id_size fields will be undefined. ** The function will return SF_ERR_NO_ERROR on success or non-zero on ** failure. */ int sf_get_chunk_size (const SF_CHUNK_ITERATOR * it, SF_CHUNK_INFO * chunk_info) ; /* Get the specified chunk data. ** If the specified chunk exists, up to chunk_info->datalen bytes of ** the chunk data will be copied into the chunk_info->data buffer ** (allocated by the caller) and the chunk_info->datalen field ** updated to reflect the size of the data. The id and id_size ** field will be updated according to the retrieved chunk ** If the chunk doesn't exist chunk_info->datalen will be zero, and the ** id and id_size fields will be undefined. ** The function will return SF_ERR_NO_ERROR on success or non-zero on ** failure. */ int sf_get_chunk_data (const SF_CHUNK_ITERATOR * it, SF_CHUNK_INFO * chunk_info) ; #ifdef __cplusplus } /* extern "C" */ #endif /* __cplusplus */ #endif /* SNDFILE_H */