Libav
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 
29 #include "aac.h"
30 #include "audio_frame_queue.h"
31 #include "psymodel.h"
32 
33 typedef struct AACEncOptions {
36 
37 struct AACEncContext;
38 
39 typedef struct AACCoefficientsEncoder {
40  void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
41  SingleChannelElement *sce, const float lambda);
43  int win, int group_len, const float lambda);
44  void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
45  int scale_idx, int cb, const float lambda);
46  void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
48 
50 
54 typedef struct AACEncContext {
61  float *planar_samples[6];
62 
64  int channels;
65  const uint8_t *chan_map;
66 
73  float lambda;
75  DECLARE_ALIGNED(16, int, qcoefs)[96];
76  DECLARE_ALIGNED(32, float, scoefs)[1024];
77 
78  struct {
79  float *samples;
80  } buffer;
82 
83 extern float ff_aac_pow34sf_tab[428];
84 
85 #endif /* AVCODEC_AACENC_H */
int size
static void encode_window_bands_info(AACEncContext *s, SingleChannelElement *sce, int win, int group_len, const float lambda)
Encode band info for single window group bands.
Definition: aaccoder.c:312
AACCoefficientsEncoder * coder
Definition: aacenc.h:70
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:58
float lambda
Definition: aacenc.h:73
float ff_aac_pow34sf_tab[428]
Definition: aacenc.c:56
AACEncOptions options
encoding options
Definition: aacenc.h:56
AAC encoder context.
Definition: aacenc.h:54
uint8_t
static void search_for_ms(AACEncContext *s, ChannelElement *cpe, const float lambda)
Definition: aaccoder.c:1054
int samplerate_index
MPEG-4 samplerate index.
Definition: aacenc.h:63
const uint8_t * chan_map
channel configuration map
Definition: aacenc.h:65
AudioFrameQueue afq
Definition: aacenc.h:74
context used by psychoacoustic model
Definition: psymodel.h:74
AVFloatDSPContext fdsp
Definition: aacenc.h:60
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
int last_frame
Definition: aacenc.h:72
int stereo_mode
Definition: aacenc.h:34
Definition: fft.h:73
static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb, const float *in, int size, int scale_idx, int cb, const float lambda)
Definition: aaccoder.c:266
AVClass * av_class
Definition: aacenc.h:55
int cur_channel
Definition: aacenc.h:71
int channels
channel count
Definition: aacenc.h:64
static char buffer[20]
Definition: seek-test.c:31
AAC definitions and structures.
FFTContext mdct128
short (128 samples) frame transform context
Definition: aacenc.h:59
PutBitContext pb
Definition: aacenc.h:57
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1050
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
Describe the class of an AVClass context structure.
Definition: log.h:33
FFPsyContext psy
Definition: aacenc.h:68
struct FFPsyPreprocessContext * psypp
Definition: aacenc.h:69
AACCoefficientsEncoder ff_aac_coders[]
Definition: aaccoder.c:1115
float * samples
Definition: aacenc.h:79
Single Channel Element - used for both SCE and LFE elements.
Definition: aac.h:227
ChannelElement * cpe
channel elements
Definition: aacenc.h:67
channel element - generic struct for SCE/CPE/CCE/LFE
Definition: aac.h:247
FFTContext mdct1024
long (1024 samples) frame transform context
Definition: aacenc.h:58
bitstream writer API