| /* |
| * Copyright (c) 2017, Intel Corporation |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the Intel Corporation nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> |
| * |
| */ |
| |
| #ifndef SRC_H |
| #define SRC_H |
| |
| struct src_param { |
| int fir_s1; |
| int fir_s2; |
| int out_s1; |
| int out_s2; |
| int sbuf_length; |
| int src_multich; |
| int total; |
| int blk_in; |
| int blk_out; |
| int stage1_times; |
| int stage2_times; |
| int stage1_times_max; |
| int stage2_times_max; |
| int idx_in; |
| int idx_out; |
| int nch; |
| }; |
| |
| struct src_stage { |
| const int idm; |
| const int odm; |
| const int num_of_subfilters; |
| const int subfilter_length; |
| const int filter_length; |
| const int blk_in; |
| const int blk_out; |
| const int halfband; |
| const int shift; |
| const void *coefs; /* Can be int16_t or int32_t depending on config */ |
| }; |
| |
| struct src_state { |
| int fir_delay_size; /* samples */ |
| int out_delay_size; /* samples */ |
| int32_t *fir_delay; |
| int32_t *out_delay; |
| int32_t *fir_wp; |
| int32_t *out_rp; |
| }; |
| |
| struct polyphase_src { |
| int number_of_stages; |
| struct src_stage *stage1; |
| struct src_stage *stage2; |
| struct src_state state1; |
| struct src_state state2; |
| }; |
| |
| struct src_stage_prm { |
| int nch; |
| int times; |
| int32_t *x_rptr; |
| int32_t *x_end_addr; |
| size_t x_size; |
| int32_t *y_wptr; |
| int32_t *y_addr; |
| int32_t *y_end_addr; |
| size_t y_size; |
| struct src_state *state; |
| struct src_stage *stage; |
| }; |
| |
| static inline void src_circ_inc_wrap(int32_t **ptr, int32_t *end, size_t size) |
| { |
| if (*ptr >= end) |
| *ptr = (int32_t *)((size_t)*ptr - size); |
| } |
| |
| static inline void src_circ_dec_wrap(int32_t **ptr, int32_t *addr, size_t size) |
| { |
| if (*ptr < addr) |
| *ptr = (int32_t *)((size_t)*ptr + size); |
| } |
| |
| void src_polyphase_reset(struct polyphase_src *src); |
| |
| int src_polyphase_init(struct polyphase_src *src, struct src_param *p, |
| int32_t *delay_lines_start); |
| |
| int src_polyphase(struct polyphase_src *src, int32_t x[], int32_t y[], |
| int n_in); |
| |
| void src_polyphase_stage_cir(struct src_stage_prm *s); |
| |
| void src_polyphase_stage_cir_s24(struct src_stage_prm *s); |
| |
| int src_buffer_lengths(struct src_param *p, int fs_in, int fs_out, int nch, |
| int frames, int frames_is_for_source); |
| |
| int32_t src_input_rates(void); |
| |
| int32_t src_output_rates(void); |
| |
| int src_ceil_divide(int a, int b); |
| |
| #endif |