Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* Copyright (C) 2002 Jean-Marc Valin */ |
| 2 | /** |
| 3 | @file vbr.h |
| 4 | @brief Variable Bit-Rate (VBR) related routines |
| 5 | */ |
| 6 | /* |
| 7 | Redistribution and use in source and binary forms, with or without |
| 8 | modification, are permitted provided that the following conditions |
| 9 | are met: |
| 10 | |
| 11 | - Redistributions of source code must retain the above copyright |
| 12 | notice, this list of conditions and the following disclaimer. |
| 13 | |
| 14 | - Redistributions in binary form must reproduce the above copyright |
| 15 | notice, this list of conditions and the following disclaimer in the |
| 16 | documentation and/or other materials provided with the distribution. |
| 17 | |
| 18 | - Neither the name of the Xiph.org Foundation nor the names of its |
| 19 | contributors may be used to endorse or promote products derived from |
| 20 | this software without specific prior written permission. |
| 21 | |
| 22 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 25 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 26 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 27 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 28 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 29 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 30 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 31 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 32 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | |
| 34 | */ |
| 35 | |
| 36 | |
| 37 | #ifndef VBR_H |
| 38 | #define VBR_H |
| 39 | |
| 40 | #include "arch.h" |
| 41 | |
| 42 | #define VBR_MEMORY_SIZE 5 |
| 43 | |
| 44 | extern const float vbr_nb_thresh[9][11]; |
| 45 | extern const float vbr_hb_thresh[5][11]; |
| 46 | extern const float vbr_uhb_thresh[2][11]; |
| 47 | |
| 48 | /** VBR state. */ |
| 49 | typedef struct VBRState { |
| 50 | float energy_alpha; |
| 51 | float average_energy; |
| 52 | float last_energy; |
| 53 | float last_log_energy[VBR_MEMORY_SIZE]; |
| 54 | float accum_sum; |
| 55 | float last_pitch_coef; |
| 56 | float soft_pitch; |
| 57 | float last_quality; |
| 58 | float noise_level; |
| 59 | float noise_accum; |
| 60 | float noise_accum_count; |
| 61 | int consec_noise; |
| 62 | } VBRState; |
| 63 | |
| 64 | void vbr_init(VBRState *vbr); |
| 65 | |
| 66 | float vbr_analysis(VBRState *vbr, spx_word16_t *sig, int len, int pitch, float pitch_coef); |
| 67 | |
| 68 | void vbr_destroy(VBRState *vbr); |
| 69 | |
| 70 | #endif |