author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:30:33 +0300 | |
branch | RCL_3 |
changeset 29 | 567bb019e3e3 |
permissions | -rw-r--r-- |
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/* Copyright (C) 2007 Jean-Marc Valin |
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File: speex_resampler.h |
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Resampling code |
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The design goals of this code are: |
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- Very fast algorithm |
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- Low memory requirement |
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- Good *perceptual* quality (and not best SNR) |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are |
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met: |
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1. Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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2. Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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3. The name of the author may not be used to endorse or promote products |
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derived from this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef SPEEX_RESAMPLER_H |
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#define SPEEX_RESAMPLER_H |
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#include <glib.h> |
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#define OUTSIDE_SPEEX |
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//#define RANDOM_PREFIX gst_audioresample |
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#ifdef OUTSIDE_SPEEX |
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/********* WARNING: MENTAL SANITY ENDS HERE *************/ |
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/* If the resampler is defined outside of Speex, we change the symbol names so that |
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there won't be any clash if linking with Speex later on. */ |
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/* #define RANDOM_PREFIX your software name here */ |
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#ifndef RANDOM_PREFIX |
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#error "Please define RANDOM_PREFIX (above) to something specific to your project to prevent symbol name clashes" |
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#endif |
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#define CAT_PREFIX2(a,b) a ## b |
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#define CAT_PREFIX(a,b) CAT_PREFIX2(a, b) |
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#define speex_resampler_init CAT_PREFIX(RANDOM_PREFIX,_resampler_init) |
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#define speex_resampler_init_frac CAT_PREFIX(RANDOM_PREFIX,_resampler_init_frac) |
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#define speex_resampler_destroy CAT_PREFIX(RANDOM_PREFIX,_resampler_destroy) |
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#define speex_resampler_process_float CAT_PREFIX(RANDOM_PREFIX,_resampler_process_float) |
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#define speex_resampler_process_int CAT_PREFIX(RANDOM_PREFIX,_resampler_process_int) |
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#define speex_resampler_process_interleaved_float CAT_PREFIX(RANDOM_PREFIX,_resampler_process_interleaved_float) |
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#define speex_resampler_process_interleaved_int CAT_PREFIX(RANDOM_PREFIX,_resampler_process_interleaved_int) |
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#define speex_resampler_set_rate CAT_PREFIX(RANDOM_PREFIX,_resampler_set_rate) |
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#define speex_resampler_get_rate CAT_PREFIX(RANDOM_PREFIX,_resampler_get_rate) |
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#define speex_resampler_set_rate_frac CAT_PREFIX(RANDOM_PREFIX,_resampler_set_rate_frac) |
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#define speex_resampler_get_ratio CAT_PREFIX(RANDOM_PREFIX,_resampler_get_ratio) |
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#define speex_resampler_set_quality CAT_PREFIX(RANDOM_PREFIX,_resampler_set_quality) |
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#define speex_resampler_get_quality CAT_PREFIX(RANDOM_PREFIX,_resampler_get_quality) |
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#define speex_resampler_set_input_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_set_input_stride) |
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#define speex_resampler_get_input_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_get_input_stride) |
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#define speex_resampler_set_output_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_set_output_stride) |
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#define speex_resampler_get_output_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_get_output_stride) |
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#define speex_resampler_get_input_latency CAT_PREFIX(RANDOM_PREFIX,_resampler_get_input_latency) |
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#define speex_resampler_get_output_latency CAT_PREFIX(RANDOM_PREFIX,_resampler_get_output_latency) |
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#define speex_resampler_skip_zeros CAT_PREFIX(RANDOM_PREFIX,_resampler_skip_zeros) |
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#define speex_resampler_reset_mem CAT_PREFIX(RANDOM_PREFIX,_resampler_reset_mem) |
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#define speex_resampler_strerror CAT_PREFIX(RANDOM_PREFIX,_resampler_strerror) |
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#define spx_int16_t gint16 |
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#define spx_int32_t gint32 |
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#define spx_uint16_t guint16 |
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#define spx_uint32_t guint32 |
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#else /* OUTSIDE_SPEEX */ |
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#ifdef _BUILD_SPEEX |
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# include "speex_types.h" |
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#else |
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# include <speex/speex_types.h> |
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#endif |
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#endif /* OUTSIDE_SPEEX */ |
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#ifdef __cplusplus |
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extern "C" |
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{ |
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#endif |
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#define SPEEX_RESAMPLER_QUALITY_MAX 10 |
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#define SPEEX_RESAMPLER_QUALITY_MIN 0 |
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#define SPEEX_RESAMPLER_QUALITY_DEFAULT 4 |
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#define SPEEX_RESAMPLER_QUALITY_VOIP 3 |
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#define SPEEX_RESAMPLER_QUALITY_DESKTOP 5 |
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|
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enum |
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{ |
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RESAMPLER_ERR_SUCCESS = 0, |
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RESAMPLER_ERR_ALLOC_FAILED = 1, |
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RESAMPLER_ERR_BAD_STATE = 2, |
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RESAMPLER_ERR_INVALID_ARG = 3, |
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RESAMPLER_ERR_PTR_OVERLAP = 4, |
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RESAMPLER_ERR_MAX_ERROR |
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}; |
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struct SpeexResamplerState_; |
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typedef struct SpeexResamplerState_ SpeexResamplerState; |
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/** Create a new resampler with integer input and output rates. |
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* @param nb_channels Number of channels to be processed |
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* @param in_rate Input sampling rate (integer number of Hz). |
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* @param out_rate Output sampling rate (integer number of Hz). |
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* @param quality Resampling quality between 0 and 10, where 0 has poor quality |
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* and 10 has very high quality. |
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* @return Newly created resampler state |
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* @retval NULL Error: not enough memory |
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*/ |
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SpeexResamplerState *speex_resampler_init (spx_uint32_t nb_channels, |
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spx_uint32_t in_rate, spx_uint32_t out_rate, int quality, int *err); |
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/** Create a new resampler with fractional input/output rates. The sampling |
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* rate ratio is an arbitrary rational number with both the numerator and |
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* denominator being 32-bit integers. |
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* @param nb_channels Number of channels to be processed |
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* @param ratio_num Numerator of the sampling rate ratio |
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* @param ratio_den Denominator of the sampling rate ratio |
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* @param in_rate Input sampling rate rounded to the nearest integer (in Hz). |
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* @param out_rate Output sampling rate rounded to the nearest integer (in Hz). |
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* @param quality Resampling quality between 0 and 10, where 0 has poor quality |
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* and 10 has very high quality. |
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* @return Newly created resampler state |
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* @retval NULL Error: not enough memory |
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*/ |
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SpeexResamplerState *speex_resampler_init_frac (spx_uint32_t nb_channels, |
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spx_uint32_t ratio_num, |
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spx_uint32_t ratio_den, |
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spx_uint32_t in_rate, spx_uint32_t out_rate, int quality, int *err); |
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/** Destroy a resampler state. |
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* @param st Resampler state |
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*/ |
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void speex_resampler_destroy (SpeexResamplerState * st); |
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|
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/** Resample a float array. The input and output buffers must *not* overlap. |
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* @param st Resampler state |
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* @param channel_index Index of the channel to process for the multi-channel |
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* base (0 otherwise) |
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* @param in Input buffer |
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* @param in_len Number of input samples in the input buffer. Returns the |
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* number of samples processed |
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* @param out Output buffer |
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* @param out_len Size of the output buffer. Returns the number of samples written |
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*/ |
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#ifdef DOUBLE_PRECISION |
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int speex_resampler_process_float (SpeexResamplerState * st, |
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spx_uint32_t channel_index, |
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const double *in, |
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spx_uint32_t * in_len, double *out, spx_uint32_t * out_len); |
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#else |
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int speex_resampler_process_float (SpeexResamplerState * st, |
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spx_uint32_t channel_index, |
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const float *in, |
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spx_uint32_t * in_len, float *out, spx_uint32_t * out_len); |
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#endif |
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|
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/** Resample an int array. The input and output buffers must *not* overlap. |
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* @param st Resampler state |
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* @param channel_index Index of the channel to process for the multi-channel |
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* base (0 otherwise) |
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* @param in Input buffer |
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* @param in_len Number of input samples in the input buffer. Returns the number |
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* of samples processed |
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* @param out Output buffer |
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* @param out_len Size of the output buffer. Returns the number of samples written |
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*/ |
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int speex_resampler_process_int (SpeexResamplerState * st, |
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spx_uint32_t channel_index, |
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const spx_int16_t * in, |
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spx_uint32_t * in_len, spx_int16_t * out, spx_uint32_t * out_len); |
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|
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/** Resample an interleaved float array. The input and output buffers must *not* overlap. |
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* @param st Resampler state |
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* @param in Input buffer |
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* @param in_len Number of input samples in the input buffer. Returns the number |
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* of samples processed. This is all per-channel. |
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* @param out Output buffer |
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* @param out_len Size of the output buffer. Returns the number of samples written. |
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* This is all per-channel. |
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*/ |
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#ifdef DOUBLE_PRECISION |
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int speex_resampler_process_interleaved_float (SpeexResamplerState * st, |
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const double *in, |
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spx_uint32_t * in_len, double *out, spx_uint32_t * out_len); |
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#else |
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int speex_resampler_process_interleaved_float (SpeexResamplerState * st, |
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const float *in, |
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spx_uint32_t * in_len, float *out, spx_uint32_t * out_len); |
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#endif |
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|
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/** Resample an interleaved int array. The input and output buffers must *not* overlap. |
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* @param st Resampler state |
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* @param in Input buffer |
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* @param in_len Number of input samples in the input buffer. Returns the number |
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* of samples processed. This is all per-channel. |
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* @param out Output buffer |
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* @param out_len Size of the output buffer. Returns the number of samples written. |
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* This is all per-channel. |
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*/ |
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int speex_resampler_process_interleaved_int (SpeexResamplerState * st, |
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const spx_int16_t * in, |
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spx_uint32_t * in_len, spx_int16_t * out, spx_uint32_t * out_len); |
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|
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/** Set (change) the input/output sampling rates (integer value). |
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* @param st Resampler state |
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* @param in_rate Input sampling rate (integer number of Hz). |
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* @param out_rate Output sampling rate (integer number of Hz). |
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*/ |
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int speex_resampler_set_rate (SpeexResamplerState * st, |
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spx_uint32_t in_rate, spx_uint32_t out_rate); |
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|
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/** Get the current input/output sampling rates (integer value). |
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* @param st Resampler state |
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* @param in_rate Input sampling rate (integer number of Hz) copied. |
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* @param out_rate Output sampling rate (integer number of Hz) copied. |
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*/ |
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void speex_resampler_get_rate (SpeexResamplerState * st, |
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spx_uint32_t * in_rate, spx_uint32_t * out_rate); |
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|
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/** Set (change) the input/output sampling rates and resampling ratio |
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* (fractional values in Hz supported). |
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* @param st Resampler state |
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* @param ratio_num Numerator of the sampling rate ratio |
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* @param ratio_den Denominator of the sampling rate ratio |
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* @param in_rate Input sampling rate rounded to the nearest integer (in Hz). |
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* @param out_rate Output sampling rate rounded to the nearest integer (in Hz). |
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*/ |
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int speex_resampler_set_rate_frac (SpeexResamplerState * st, |
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spx_uint32_t ratio_num, |
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spx_uint32_t ratio_den, spx_uint32_t in_rate, spx_uint32_t out_rate); |
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|
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/** Get the current resampling ratio. This will be reduced to the least |
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* common denominator. |
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* @param st Resampler state |
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* @param ratio_num Numerator of the sampling rate ratio copied |
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* @param ratio_den Denominator of the sampling rate ratio copied |
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*/ |
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void speex_resampler_get_ratio (SpeexResamplerState * st, |
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spx_uint32_t * ratio_num, spx_uint32_t * ratio_den); |
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|
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/** Set (change) the conversion quality. |
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* @param st Resampler state |
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* @param quality Resampling quality between 0 and 10, where 0 has poor |
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* quality and 10 has very high quality. |
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*/ |
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int speex_resampler_set_quality (SpeexResamplerState * st, int quality); |
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|
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/** Get the conversion quality. |
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* @param st Resampler state |
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* @param quality Resampling quality between 0 and 10, where 0 has poor |
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* quality and 10 has very high quality. |
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*/ |
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void speex_resampler_get_quality (SpeexResamplerState * st, int *quality); |
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|
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/** Set (change) the input stride. |
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* @param st Resampler state |
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* @param stride Input stride |
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*/ |
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void speex_resampler_set_input_stride (SpeexResamplerState * st, |
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spx_uint32_t stride); |
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|
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/** Get the input stride. |
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* @param st Resampler state |
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* @param stride Input stride copied |
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*/ |
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void speex_resampler_get_input_stride (SpeexResamplerState * st, |
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spx_uint32_t * stride); |
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|
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/** Set (change) the output stride. |
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* @param st Resampler state |
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* @param stride Output stride |
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*/ |
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void speex_resampler_set_output_stride (SpeexResamplerState * st, |
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spx_uint32_t stride); |
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|
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/** Get the output stride. |
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* @param st Resampler state copied |
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* @param stride Output stride |
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*/ |
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void speex_resampler_get_output_stride (SpeexResamplerState * st, |
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spx_uint32_t * stride); |
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|
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/** Get the latency in input samples introduced by the resampler. |
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* @param st Resampler state |
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*/ |
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int speex_resampler_get_input_latency (SpeexResamplerState * st); |
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|
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/** Get the latency in output samples introduced by the resampler. |
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* @param st Resampler state |
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*/ |
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int speex_resampler_get_output_latency (SpeexResamplerState * st); |
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|
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/** Make sure that the first samples to go out of the resamplers don't have |
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* leading zeros. This is only useful before starting to use a newly created |
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* resampler. It is recommended to use that when resampling an audio file, as |
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* it will generate a file with the same length. For real-time processing, |
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* it is probably easier not to use this call (so that the output duration |
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* is the same for the first frame). |
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* @param st Resampler state |
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*/ |
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int speex_resampler_skip_zeros (SpeexResamplerState * st); |
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|
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/** Reset a resampler so a new (unrelated) stream can be processed. |
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* @param st Resampler state |
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*/ |
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int speex_resampler_reset_mem (SpeexResamplerState * st); |
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|
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/** Returns the English meaning for an error code |
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* @param err Error code |
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* @return English string |
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*/ |
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const char *speex_resampler_strerror (int err); |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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|
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#endif |