3 * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVCODEC_OPUSENC_H
23 #define AVCODEC_OPUSENC_H
26 #include "opus_celt.h"
28 /* Determines the maximum delay the psychoacoustic system will use for lookahead */
29 #define FF_BUFQUEUE_SIZE 145
30 #include "libavfilter/bufferqueue.h"
32 #define OPUS_MAX_LOOKAHEAD ((FF_BUFQUEUE_SIZE - 1)*2.5f)
34 #define OPUS_MAX_CHANNELS 2
36 /* 120 ms / 2.5 ms = 48 frames (extremely improbable, but the encoder'll work) */
37 #define OPUS_MAX_FRAMES_PER_PACKET 48
39 #define OPUS_BLOCK_SIZE(x) (2 * 15 * (1 << ((x) + 2)))
41 #define OPUS_SAMPLES_TO_BLOCK_SIZE(x) (ff_log2((x) / (2 * 15)) - 2)
43 typedef struct OpusEncOptions {
47 typedef struct OpusPacketInfo {
49 enum OpusBandwidth bandwidth;
54 #endif /* AVCODEC_OPUSENC_H */