aacenc.h
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1 /*
2  * AAC encoder
3  * Copyright (C) 2008 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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_AACENC_H
23 #define AVCODEC_AACENC_H
24 
25 #include "libavutil/float_dsp.h"
26 #include "avcodec.h"
27 #include "put_bits.h"
28 #include "dsputil.h"
29 
30 #include "aac.h"
31 #include "audio_frame_queue.h"
32 #include "psymodel.h"
33 
34 typedef struct AACEncOptions {
37 
38 struct AACEncContext;
39 
40 typedef struct AACCoefficientsEncoder {
42  SingleChannelElement *sce, const float lambda);
44  int win, int group_len, const float lambda);
45  void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
46  int scale_idx, int cb, const float lambda);
47  void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
49 
51 
55 typedef struct AACEncContext {
63  float *planar_samples[6];
64 
66  int channels;
67  const uint8_t *chan_map;
68 
75  float lambda;
77  DECLARE_ALIGNED(16, int, qcoefs)[96];
78  DECLARE_ALIGNED(32, float, scoefs)[1024];
79 
80  struct {
81  float *samples;
82  } buffer;
84 
85 extern float ff_aac_pow34sf_tab[428];
86 
87 #endif /* AVCODEC_AACENC_H */
void(* search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda)
Definition: aacenc.h:47
int size
struct AACEncOptions AACEncOptions
struct AACEncContext::@3 buffer
AACCoefficientsEncoder * coder
Definition: aacenc.h:72
float lambda
Definition: aacenc.h:75
float ff_aac_pow34sf_tab[428]
Definition: aacenc.c:57
AACEncOptions options
encoding options
Definition: aacenc.h:57
AAC encoder context.
Definition: aacenc.h:55
uint8_t
void(* quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size, int scale_idx, int cb, const float lambda)
Definition: aacenc.h:45
int samplerate_index
MPEG-4 samplerate index.
Definition: aacenc.h:65
const uint8_t * chan_map
channel configuration map
Definition: aacenc.h:67
int qcoefs[96]
quantized coefficients
Definition: aacenc.h:77
AudioFrameQueue afq
Definition: aacenc.h:76
context used by psychoacoustic model
Definition: psymodel.h:74
AVFloatDSPContext fdsp
Definition: aacenc.h:62
struct AACCoefficientsEncoder AACCoefficientsEncoder
int last_frame
Definition: aacenc.h:74
int stereo_mode
Definition: aacenc.h:35
void(* search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s, SingleChannelElement *sce, const float lambda)
Definition: aacenc.h:41
struct AACEncContext AACEncContext
AAC encoder context.
Definition: fft.h:62
AVClass * av_class
Definition: aacenc.h:56
int cur_channel
Definition: aacenc.h:73
int channels
channel count
Definition: aacenc.h:66
AAC definitions and structures.
FFTContext mdct128
short (128 samples) frame transform context
Definition: aacenc.h:60
PutBitContext pb
Definition: aacenc.h:58
external API header
main external API structure.
Definition: avcodec.h:1339
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
DSPContext dsp
Definition: aacenc.h:61
void(* encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce, int win, int group_len, const float lambda)
Definition: aacenc.h:43
Describe the class of an AVClass context structure.
Definition: log.h:33
FFPsyContext psy
Definition: aacenc.h:70
struct FFPsyPreprocessContext * psypp
Definition: aacenc.h:71
AACCoefficientsEncoder ff_aac_coders[]
Definition: aaccoder.c:1115
float * samples
Definition: aacenc.h:81
Single Channel Element - used for both SCE and LFE elements.
Definition: aac.h:228
ChannelElement * cpe
channel elements
Definition: aacenc.h:69
DSP utils.
channel element - generic struct for SCE/CPE/CCE/LFE
Definition: aac.h:248
FFTContext mdct1024
long (1024 samples) frame transform context
Definition: aacenc.h:59
float scoefs[1024]
scaled coefficients
Definition: aacenc.h:78
DSPContext.
Definition: dsputil.h:194
float * planar_samples[6]
saved preprocessed input
Definition: aacenc.h:63
bitstream writer API