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107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
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* Opus encoder
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* Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_OPUSENC_PSY_H
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#define AVCODEC_OPUSENC_PSY_H
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#include "libavutil/mem_internal.h"
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#include "opusenc.h"
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#include "opusenc_utils.h"
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#include "libavfilter/window_func.h"
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/* Each step is 2.5ms */
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typedef struct OpusPsyStep {
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int index; /* Current index */
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int silence;
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float energy[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Masking effects included */
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float tone[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Tonality */
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float stereo[CELT_MAX_BANDS]; /* IS/MS compatibility */
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float change_amp[OPUS_MAX_CHANNELS][CELT_MAX_BANDS]; /* Jump over last frame */
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float total_change; /* Total change */
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float *bands[OPUS_MAX_CHANNELS][CELT_MAX_BANDS];
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float coeffs[OPUS_MAX_CHANNELS][OPUS_BLOCK_SIZE(CELT_BLOCK_960)];
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} OpusPsyStep;
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typedef struct OpusBandExcitation {
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float excitation;
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float excitation_dist;
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float excitation_init;
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} OpusBandExcitation;
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typedef struct PsyChain {
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int start;
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int end;
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} PsyChain;
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typedef struct OpusPsyContext {
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AVCodecContext *avctx;
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AVFloatDSPContext *dsp;
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struct FFBufQueue *bufqueue;
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OpusEncOptions *options;
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PsyChain cs[128];
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int cs_num;
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OpusBandExcitation ex[OPUS_MAX_CHANNELS][CELT_MAX_BANDS];
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FFBesselFilter bfilter_lo[OPUS_MAX_CHANNELS][CELT_MAX_BANDS];
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FFBesselFilter bfilter_hi[OPUS_MAX_CHANNELS][CELT_MAX_BANDS];
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OpusPsyStep *steps[FF_BUFQUEUE_SIZE + 1];
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int max_steps;
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float *window[CELT_BLOCK_NB];
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MDCT15Context *mdct[CELT_BLOCK_NB];
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int bsize_analysis;
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DECLARE_ALIGNED(32, float, scratch)[2048];
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/* Stats */
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float rc_waste;
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float avg_is_band;
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int64_t dual_stereo_used;
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int64_t total_packets_out;
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/* State */
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FFBesselFilter lambda_lp;
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OpusPacketInfo p;
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int redo_analysis;
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int buffered_steps;
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int steps_to_process;
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int eof;
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float lambda;
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int *inflection_points;
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int inflection_points_count;
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} OpusPsyContext;
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int ff_opus_psy_process (OpusPsyContext *s, OpusPacketInfo *p);
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void ff_opus_psy_celt_frame_init (OpusPsyContext *s, CeltFrame *f, int index);
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int ff_opus_psy_celt_frame_process(OpusPsyContext *s, CeltFrame *f, int index);
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void ff_opus_psy_postencode_update (OpusPsyContext *s, CeltFrame *f, OpusRangeCoder *rc);
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int ff_opus_psy_init(OpusPsyContext *s, AVCodecContext *avctx,
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struct FFBufQueue *bufqueue, OpusEncOptions *options);
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void ff_opus_psy_signal_eof(OpusPsyContext *s);
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int ff_opus_psy_end(OpusPsyContext *s);
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#endif /* AVCODEC_OPUSENC_PSY_H */
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