3 * Copyright (C) 2008 Konstantin Shishkov
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_AACENC_H
23 #define AVCODEC_AACENC_H
25 #include "libavutil/float_dsp.h"
30 #include "audio_frame_queue.h"
35 typedef enum AACCoder {
43 typedef struct AACEncOptions {
55 typedef struct AACCoefficientsEncoder {
56 void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
57 SingleChannelElement *sce, const float lambda);
58 void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
59 int win, int group_len, const float lambda);
60 void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size,
61 int scale_idx, int cb, const float lambda, int rtz);
62 void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce);
63 void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
64 void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
65 void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe);
66 void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe);
67 void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
68 void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce);
69 void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce);
70 void (*ltp_insert_new_frame)(struct AACEncContext *s);
71 void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);
72 void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
73 void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
74 void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce);
75 void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
76 void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
77 void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
78 void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce);
79 } AACCoefficientsEncoder;
81 extern const AACCoefficientsEncoder ff_aac_coders[];
83 typedef struct AACQuantizeBandCostCacheEntry {
90 } AACQuantizeBandCostCacheEntry;
95 typedef struct AACEncContext {
97 AACEncOptions options; ///< encoding options
99 FFTContext mdct1024; ///< long (1024 samples) frame transform context
100 FFTContext mdct128; ///< short (128 samples) frame transform context
101 AVFloatDSPContext *fdsp;
102 float *planar_samples[8]; ///< saved preprocessed input
104 int profile; ///< copied from avctx
105 LPCContext lpc; ///< used by TNS
106 int samplerate_index; ///< MPEG-4 samplerate index
107 int channels; ///< channel count
108 const uint8_t *chan_map; ///< channel configuration map
110 ChannelElement *cpe; ///< channel elements
112 struct FFPsyPreprocessContext* psypp;
113 const AACCoefficientsEncoder *coder;
114 int cur_channel; ///< current channel for coder context
117 int last_frame_pb_count; ///< number of bits for the previous frame
118 float lambda_sum; ///< sum(lambda), for Qvg reporting
119 int lambda_count; ///< count(lambda), for Qvg reporting
120 enum RawDataBlockType cur_type; ///< channel group type cur_channel belongs to
123 DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients
124 DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients
126 uint16_t quantize_band_cost_cache_generation;
127 AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost
129 void (*abs_pow34)(float *out, const float *in, const int size);
130 void (*quant_bands)(int *out, const float *in, const float *scaled,
131 int size, int is_signed, int maxval, const float Q34,
132 const float rounding);
139 void ff_aac_dsp_init_x86(AACEncContext *s);
140 void ff_aac_coder_init_mips(AACEncContext *c);
141 void ff_quantize_band_cost_cache_init(struct AACEncContext *s);
144 #endif /* AVCODEC_AACENC_H */