1 /* Copyright (c) 2017 Google Inc. 2 Written by Andrew Allen */ 3 /* 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions 6 are met: 7 8 - Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 11 - Redistributions in binary form must reproduce the above copyright 12 notice, this list of conditions and the following disclaimer in the 13 documentation and/or other materials provided with the distribution. 14 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /** 29 * @file mapping_matrix.h 30 * @brief Opus reference implementation mapping matrix API 31 */ 32 33 #ifndef MAPPING_MATRIX_H 34 #define MAPPING_MATRIX_H 35 36 #include "opus_types.h" 37 #include "opus_projection.h" 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 typedef struct MappingMatrix 44 { 45 int rows; /* number of channels outputted from matrix. */ 46 int cols; /* number of channels inputted to matrix. */ 47 int gain; /* in dB. S7.8-format. */ 48 /* Matrix cell data goes here using col-wise ordering. */ 49 } MappingMatrix; 50 51 opus_int32 mapping_matrix_get_size(int rows, int cols); 52 53 opus_int16 *mapping_matrix_get_data(const MappingMatrix *matrix); 54 55 void mapping_matrix_init( 56 MappingMatrix * const st, 57 int rows, 58 int cols, 59 int gain, 60 const opus_int16 *data, 61 opus_int32 data_size 62 ); 63 64 #ifndef DISABLE_FLOAT_API 65 void mapping_matrix_multiply_channel_in_float( 66 const MappingMatrix *matrix, 67 const float *input, 68 int input_rows, 69 opus_val16 *output, 70 int output_row, 71 int output_rows, 72 int frame_size 73 ); 74 75 void mapping_matrix_multiply_channel_out_float( 76 const MappingMatrix *matrix, 77 const opus_val16 *input, 78 int input_row, 79 int input_rows, 80 float *output, 81 int output_rows, 82 int frame_size 83 ); 84 #endif /* DISABLE_FLOAT_API */ 85 86 void mapping_matrix_multiply_channel_in_short( 87 const MappingMatrix *matrix, 88 const opus_int16 *input, 89 int input_rows, 90 opus_val16 *output, 91 int output_row, 92 int output_rows, 93 int frame_size 94 ); 95 96 void mapping_matrix_multiply_channel_out_short( 97 const MappingMatrix *matrix, 98 const opus_val16 *input, 99 int input_row, 100 int input_rows, 101 opus_int16 *output, 102 int output_rows, 103 int frame_size 104 ); 105 106 /* Pre-computed mixing and demixing matrices for 1st to 3rd-order ambisonics. 107 * foa: first-order ambisonics 108 * soa: second-order ambisonics 109 * toa: third-order ambisonics 110 */ 111 extern const MappingMatrix mapping_matrix_foa_mixing; 112 extern const opus_int16 mapping_matrix_foa_mixing_data[36]; 113 114 extern const MappingMatrix mapping_matrix_soa_mixing; 115 extern const opus_int16 mapping_matrix_soa_mixing_data[121]; 116 117 extern const MappingMatrix mapping_matrix_toa_mixing; 118 extern const opus_int16 mapping_matrix_toa_mixing_data[324]; 119 120 extern const MappingMatrix mapping_matrix_foa_demixing; 121 extern const opus_int16 mapping_matrix_foa_demixing_data[36]; 122 123 extern const MappingMatrix mapping_matrix_soa_demixing; 124 extern const opus_int16 mapping_matrix_soa_demixing_data[121]; 125 126 extern const MappingMatrix mapping_matrix_toa_demixing; 127 extern const opus_int16 mapping_matrix_toa_demixing_data[324]; 128 129 #ifdef __cplusplus 130 } 131 #endif 132 133 #endif /* MAPPING_MATRIX_H */ 134
