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Diffstat (limited to 'lib/libsamplerate/libsamplerate-0.2.2/include')
| -rwxr-xr-x | lib/libsamplerate/libsamplerate-0.2.2/include/samplerate.h | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/lib/libsamplerate/libsamplerate-0.2.2/include/samplerate.h b/lib/libsamplerate/libsamplerate-0.2.2/include/samplerate.h deleted file mode 100755 index c06024d2..00000000 --- a/lib/libsamplerate/libsamplerate-0.2.2/include/samplerate.h +++ /dev/null @@ -1,189 +0,0 @@ -/* -** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com> -** All rights reserved. -** -** This code is released under 2-clause BSD license. Please see the -** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING -*/ - -/* -** API documentation is available here: -** http://libsndfile.github.io/libsamplerate/api.html -*/ - -#ifndef SAMPLERATE_H -#define SAMPLERATE_H - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - - -/* Opaque data type SRC_STATE. */ -typedef struct SRC_STATE_tag SRC_STATE ; - -/* SRC_DATA is used to pass data to src_simple() and src_process(). */ -typedef struct -{ const float *data_in ; - float *data_out ; - - long input_frames, output_frames ; - long input_frames_used, output_frames_gen ; - - int end_of_input ; - - float src_ratio ; -} SRC_DATA ; - -/* -** User supplied callback function type for use with src_callback_new() -** and src_callback_read(). First parameter is the same pointer that was -** passed into src_callback_new(). Second parameter is pointer to a -** pointer. The user supplied callback function must modify *data to -** point to the start of the user supplied float array. The user supplied -** function must return the number of frames that **data points to. -*/ - -typedef long (*src_callback_t) (void *cb_data, float **data) ; - -/* -** Standard initialisation function : return an anonymous pointer to the -** internal state of the converter. Choose a converter from the enums below. -** Error returned in *error. -*/ - -SRC_STATE* src_new (int converter_type, int channels, int *error) ; - -/* -** Clone a handle : return an anonymous pointer to a new converter -** containing the same internal state as orig. Error returned in *error. -*/ -SRC_STATE* src_clone (SRC_STATE* orig, int *error) ; - -/* -** Initilisation for callback based API : return an anonymous pointer to the -** internal state of the converter. Choose a converter from the enums below. -** The cb_data pointer can point to any data or be set to NULL. Whatever the -** value, when processing, user supplied function "func" gets called with -** cb_data as first parameter. -*/ - -SRC_STATE* src_callback_new (src_callback_t func, int converter_type, int channels, - int *error, void* cb_data) ; - -/* -** Cleanup all internal allocations. -** Always returns NULL. -*/ - -SRC_STATE* src_delete (SRC_STATE *state) ; - -/* -** Standard processing function. -** Returns non zero on error. -*/ - -int src_process (SRC_STATE *state, SRC_DATA *data) ; - -/* -** Callback based processing function. Read up to frames worth of data from -** the converter int *data and return frames read or -1 on error. -*/ -long src_callback_read (SRC_STATE *state, float src_ratio, long frames, float *data) ; - -/* -** Simple interface for performing a single conversion from input buffer to -** output buffer at a fixed conversion ratio. -** Simple interface does not require initialisation as it can only operate on -** a single buffer worth of audio. -*/ - -int src_simple (SRC_DATA *data, int converter_type, int channels) ; - -/* -** This library contains a number of different sample rate converters, -** numbered 0 through N. -** -** Return a string giving either a name or a more full description of each -** sample rate converter or NULL if no sample rate converter exists for -** the given value. The converters are sequentially numbered from 0 to N. -*/ - -const char *src_get_name (int converter_type) ; -const char *src_get_description (int converter_type) ; -const char *src_get_version (void) ; - -/* -** Set a new SRC ratio. This allows step responses -** in the conversion ratio. -** Returns non zero on error. -*/ - -int src_set_ratio (SRC_STATE *state, float new_ratio) ; - -/* -** Get the current channel count. -** Returns negative on error, positive channel count otherwise -*/ - -int src_get_channels (SRC_STATE *state) ; - -/* -** Reset the internal SRC state. -** Does not modify the quality settings. -** Does not free any memory allocations. -** Returns non zero on error. -*/ - -int src_reset (SRC_STATE *state) ; - -/* -** Return TRUE if ratio is a valid conversion ratio, FALSE -** otherwise. -*/ - -int src_is_valid_ratio (float ratio) ; - -/* -** Return an error number. -*/ - -int src_error (SRC_STATE *state) ; - -/* -** Convert the error number into a string. -*/ -const char* src_strerror (int error) ; - -/* -** The following enums can be used to set the interpolator type -** using the function src_set_converter(). -*/ - -enum -{ - SRC_SINC_BEST_QUALITY = 0, - SRC_SINC_MEDIUM_QUALITY = 1, - SRC_SINC_FASTEST = 2, - SRC_ZERO_ORDER_HOLD = 3, - SRC_LINEAR = 4, -} ; - -/* -** Extra helper functions for converting from short to float and -** back again. -*/ - -void src_short_to_float_array (const short *in, float *out, int len) ; -void src_float_to_short_array (const float *in, short *out, int len) ; - -void src_int_to_float_array (const int *in, float *out, int len) ; -void src_float_to_int_array (const float *in, int *out, int len) ; - - -#ifdef __cplusplus -} /* extern "C" */ -#endif /* __cplusplus */ - -#endif /* SAMPLERATE_H */ - |