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55 lines
1.6 KiB
C
55 lines
1.6 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_H
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#define AVCODEC_OPUSENC_H
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#include "opus_celt.h"
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/* Determines the maximum delay the psychoacoustic system will use for lookahead */
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#define FF_BUFQUEUE_SIZE 145
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#include "libavfilter/bufferqueue.h"
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#define OPUS_MAX_LOOKAHEAD ((FF_BUFQUEUE_SIZE - 1)*2.5f)
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#define OPUS_MAX_CHANNELS 2
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/* 120 ms / 2.5 ms = 48 frames (extremely improbable, but the encoder'll work) */
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#define OPUS_MAX_FRAMES_PER_PACKET 48
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#define OPUS_BLOCK_SIZE(x) (2 * 15 * (1 << ((x) + 2)))
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#define OPUS_SAMPLES_TO_BLOCK_SIZE(x) (ff_log2((x) / (2 * 15)) - 2)
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typedef struct OpusEncOptions {
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float max_delay_ms;
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int apply_phase_inv;
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} OpusEncOptions;
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typedef struct OpusPacketInfo {
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enum OpusMode mode;
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enum OpusBandwidth bandwidth;
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int framesize;
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int frames;
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} OpusPacketInfo;
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#endif /* AVCODEC_OPUSENC_H */
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