android / platform / external / bluetooth / bluez / 141398b744c9f934133b319574ff55344277fae0 / . / sbc / sbc_primitives.h

/* | |

* | |

* Bluetooth low-complexity, subband codec (SBC) library | |

* | |

* Copyright (C) 2008-2010 Nokia Corporation | |

* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> | |

* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch> | |

* Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com> | |

* | |

* | |

* This library 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 library 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 library; if not, write to the Free Software | |

* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |

* | |

*/ | |

#ifndef __SBC_PRIMITIVES_H | |

#define __SBC_PRIMITIVES_H | |

#define SCALE_OUT_BITS 15 | |

#define SBC_X_BUFFER_SIZE 328 | |

#ifdef __GNUC__ | |

#define SBC_ALWAYS_INLINE __attribute__((always_inline)) | |

#else | |

#define SBC_ALWAYS_INLINE inline | |

#endif | |

struct sbc_encoder_state { | |

int position; | |

int16_t SBC_ALIGNED X[2][SBC_X_BUFFER_SIZE]; | |

/* Polyphase analysis filter for 4 subbands configuration, | |

* it handles 4 blocks at once */ | |

void (*sbc_analyze_4b_4s)(int16_t *x, int32_t *out, int out_stride); | |

/* Polyphase analysis filter for 8 subbands configuration, | |

* it handles 4 blocks at once */ | |

void (*sbc_analyze_4b_8s)(int16_t *x, int32_t *out, int out_stride); | |

/* Process input data (deinterleave, endian conversion, reordering), | |

* depending on the number of subbands and input data byte order */ | |

int (*sbc_enc_process_input_4s_le)(int position, | |

const uint8_t *pcm, int16_t X[2][SBC_X_BUFFER_SIZE], | |

int nsamples, int nchannels); | |

int (*sbc_enc_process_input_4s_be)(int position, | |

const uint8_t *pcm, int16_t X[2][SBC_X_BUFFER_SIZE], | |

int nsamples, int nchannels); | |

int (*sbc_enc_process_input_8s_le)(int position, | |

const uint8_t *pcm, int16_t X[2][SBC_X_BUFFER_SIZE], | |

int nsamples, int nchannels); | |

int (*sbc_enc_process_input_8s_be)(int position, | |

const uint8_t *pcm, int16_t X[2][SBC_X_BUFFER_SIZE], | |

int nsamples, int nchannels); | |

/* Scale factors calculation */ | |

void (*sbc_calc_scalefactors)(int32_t sb_sample_f[16][2][8], | |

uint32_t scale_factor[2][8], | |

int blocks, int channels, int subbands); | |

/* Scale factors calculation with joint stereo support */ | |

int (*sbc_calc_scalefactors_j)(int32_t sb_sample_f[16][2][8], | |

uint32_t scale_factor[2][8], | |

int blocks, int subbands); | |

const char *implementation_info; | |

}; | |

/* | |

* Initialize pointers to the functions which are the basic "building bricks" | |

* of SBC codec. Best implementation is selected based on target CPU | |

* capabilities. | |

*/ | |

void sbc_init_primitives(struct sbc_encoder_state *encoder_state); | |

#endif |