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opusenc.h
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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_H
23 #define AVCODEC_OPUSENC_H
24 
25 #include "internal.h"
26 #include "opus_celt.h"
27 
28 /* Determines the maximum delay the psychoacoustic system will use for lookahead */
29 #define FF_BUFQUEUE_SIZE 145
31 
32 #define OPUS_MAX_LOOKAHEAD ((FF_BUFQUEUE_SIZE - 1)*2.5f)
33 
34 #define OPUS_MAX_CHANNELS 2
35 
36 /* 120 ms / 2.5 ms = 48 frames (extremely improbable, but the encoder'll work) */
37 #define OPUS_MAX_FRAMES_PER_PACKET 48
38 
39 #define OPUS_BLOCK_SIZE(x) (2 * 15 * (1 << ((x) + 2)))
40 
41 #define OPUS_SAMPLES_TO_BLOCK_SIZE(x) (ff_log2((x) / (2 * 15)) - 2)
42 
43 typedef struct OpusEncOptions {
44  float max_delay_ms;
46 
47 typedef struct OpusPacketInfo {
48  enum OpusMode mode;
50  int framesize;
51  int frames;
53 
55 
56 #endif /* AVCODEC_OPUSENC_H */
float max_delay_ms
Definition: opusenc.h:44
enum OpusBandwidth bandwidth
Definition: opusenc.h:49
void ff_celt_enc_bitalloc(CeltFrame *f, OpusRangeCoder *rc)
Definition: opusenc.c:285
enum OpusMode mode
Definition: opusenc.h:48
int framesize
Definition: opusenc.h:50
common internal api header.
OpusBandwidth
Definition: opus.h:70
OpusMode
Definition: opus.h:62