1 /* 2 * Opus encoder 3 * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 #ifndef AVCODEC_OPUSENC_PSY_H 23 #define AVCODEC_OPUSENC_PSY_H 24 25 #include "opusenc.h" 26 #include "opusenc_utils.h" 27 #include "libavfilter/window_func.h" 28 29 /* Each step is 2.5ms */ 30 typedef struct OpusPsyStep { 31 int index; /* Current index */ 32 int silence; 33 float energy[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Masking effects included */ 34 float tone[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Tonality */ 35 float stereo[CELT_MAX_BANDS]; /* IS/MS compatibility */ 36 float change_amp[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Jump over last frame */ 37 float total_change; /* Total change */ 38 39 float *bands[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; 40 float coeffs[OPUS_MAX_CHANNELS][OPUS_BLOCK_SIZE(CELT_BLOCK_960)]; 41 } OpusPsyStep; 42 43 typedef struct OpusBandExcitation { 44 float excitation; 45 float excitation_dist; 46 float excitation_init; 47 } OpusBandExcitation; 48 49 typedef struct PsyChain { 50 int start; 51 int end; 52 } PsyChain; 53 54 typedef struct OpusPsyContext { 55 AVCodecContext *avctx; 56 AVFloatDSPContext *dsp; 57 struct FFBufQueue *bufqueue; 58 OpusEncOptions *options; 59 60 PsyChain cs[128]; 61 int cs_num; 62 63 OpusBandExcitation ex[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; 64 FFBesselFilter bfilter_lo[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; 65 FFBesselFilter bfilter_hi[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; 66 67 OpusPsyStep *steps[FF_BUFQUEUE_SIZE + 1]; 68 int max_steps; 69 70 float *window[CELT_BLOCK_NB]; 71 MDCT15Context *mdct[CELT_BLOCK_NB]; 72 int bsize_analysis; 73 74 DECLARE_ALIGNED(32, float, scratch)[2048]; 75 76 /* Stats */ 77 float rc_waste; 78 float avg_is_band; 79 int64_t dual_stereo_used; 80 int64_t total_packets_out; 81 82 /* State */ 83 FFBesselFilter lambda_lp; 84 OpusPacketInfo p; 85 int redo_analysis; 86 int buffered_steps; 87 int steps_to_process; 88 int eof; 89 float lambda; 90 int *inflection_points; 91 int inflection_points_count; 92 } OpusPsyContext; 93 94 int ff_opus_psy_process (OpusPsyContext *s, OpusPacketInfo *p); 95 void ff_opus_psy_celt_frame_init (OpusPsyContext *s, CeltFrame *f, int index); 96 int ff_opus_psy_celt_frame_process(OpusPsyContext *s, CeltFrame *f, int index); 97 void ff_opus_psy_postencode_update (OpusPsyContext *s, CeltFrame *f, OpusRangeCoder *rc); 98 99 int ff_opus_psy_init(OpusPsyContext *s, AVCodecContext *avctx, 100 struct FFBufQueue *bufqueue, OpusEncOptions *options); 101 void ff_opus_psy_signal_eof(OpusPsyContext *s); 102 int ff_opus_psy_end(OpusPsyContext *s); 103 104 #endif /* AVCODEC_OPUSENC_PSY_H */ 105