/* * AAC encoder * Copyright (C) 2008 Konstantin Shishkov * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_AACENC_H #define AVCODEC_AACENC_H #include "libavutil/channel_layout.h" #include "libavutil/float_dsp.h" #include "libavutil/mem_internal.h" #include "avcodec.h" #include "put_bits.h" #include "aac.h" #include "audio_frame_queue.h" #include "psymodel.h" #include "lpc.h" typedef enum AACCoder { AAC_CODER_ANMR = 0, AAC_CODER_TWOLOOP, AAC_CODER_FAST, AAC_CODER_NB, }AACCoder; typedef struct AACEncOptions { int coder; int pns; int tns; int ltp; int pce; int pred; int mid_side; int intensity_stereo; } AACEncOptions; struct AACEncContext; typedef struct AACCoefficientsEncoder { void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s, SingleChannelElement *sce, const float lambda); void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce, int win, int group_len, const float lambda); void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size, int scale_idx, int cb, const float lambda, int rtz); void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce); void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window); void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce); void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe); void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe); void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce); void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce); void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce); void (*ltp_insert_new_frame)(struct AACEncContext *s); void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce); void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce); void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce); void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce); void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window); void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe); void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe); void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce); } AACCoefficientsEncoder; extern const AACCoefficientsEncoder ff_aac_coders[]; typedef struct AACQuantizeBandCostCacheEntry { float rd; float energy; int bits; char cb; char rtz; uint16_t generation; } AACQuantizeBandCostCacheEntry; typedef struct AACPCEInfo { AVChannelLayout layout; int num_ele[4]; ///< front, side, back, lfe int pairing[3][8]; ///< front, side, back int index[4][8]; ///< front, side, back, lfe uint8_t config_map[16]; ///< configs the encoder's channel specific settings uint8_t reorder_map[16]; ///< maps channels from lavc to aac order } AACPCEInfo; /** * AAC encoder context */ typedef struct AACEncContext { AVClass *av_class; AACEncOptions options; ///< encoding options PutBitContext pb; AVTXContext *mdct1024; ///< long (1024 samples) frame transform context av_tx_fn mdct1024_fn; AVTXContext *mdct128; ///< short (128 samples) frame transform context av_tx_fn mdct128_fn; AVFloatDSPContext *fdsp; AACPCEInfo pce; ///< PCE data, if needed float *planar_samples[16]; ///< saved preprocessed input int profile; ///< copied from avctx int needs_pce; ///< flag for non-standard layout LPCContext lpc; ///< used by TNS int samplerate_index; ///< MPEG-4 samplerate index int channels; ///< channel count const uint8_t *reorder_map; ///< lavc to aac reorder map const uint8_t *chan_map; ///< channel configuration map ChannelElement *cpe; ///< channel elements FFPsyContext psy; struct FFPsyPreprocessContext* psypp; const AACCoefficientsEncoder *coder; int cur_channel; ///< current channel for coder context int random_state; float lambda; int last_frame_pb_count; ///< number of bits for the previous frame float lambda_sum; ///< sum(lambda), for Qvg reporting int lambda_count; ///< count(lambda), for Qvg reporting enum RawDataBlockType cur_type; ///< channel group type cur_channel belongs to AudioFrameQueue afq; DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients uint16_t quantize_band_cost_cache_generation; AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost void (*abs_pow34)(float *out, const float *in, const int size); void (*quant_bands)(int *out, const float *in, const float *scaled, int size, int is_signed, int maxval, const float Q34, const float rounding); struct { float *samples; } buffer; } AACEncContext; void ff_aac_dsp_init_x86(AACEncContext *s); void ff_aac_coder_init_mips(AACEncContext *c); void ff_quantize_band_cost_cache_init(struct AACEncContext *s); #endif /* AVCODEC_AACENC_H */