| /* |
| * 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/float_dsp.h" |
| #include "avcodec.h" |
| #include "put_bits.h" |
| |
| #include "aac.h" |
| #include "audio_frame_queue.h" |
| #include "psymodel.h" |
| |
| typedef enum AACCoder { |
| AAC_CODER_FAAC = 0, |
| AAC_CODER_ANMR, |
| AAC_CODER_TWOLOOP, |
| AAC_CODER_FAST, |
| |
| AAC_CODER_NB, |
| }AACCoder; |
| |
| typedef struct AACEncOptions { |
| int stereo_mode; |
| int aac_coder; |
| } 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, int size, |
| int scale_idx, int cb, const float lambda); |
| void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda); |
| } AACCoefficientsEncoder; |
| |
| extern AACCoefficientsEncoder ff_aac_coders[]; |
| |
| /** |
| * AAC encoder context |
| */ |
| typedef struct AACEncContext { |
| AVClass *av_class; |
| AACEncOptions options; ///< encoding options |
| PutBitContext pb; |
| FFTContext mdct1024; ///< long (1024 samples) frame transform context |
| FFTContext mdct128; ///< short (128 samples) frame transform context |
| AVFloatDSPContext fdsp; |
| float *planar_samples[6]; ///< saved preprocessed input |
| |
| int samplerate_index; ///< MPEG-4 samplerate index |
| int channels; ///< channel count |
| const uint8_t *chan_map; ///< channel configuration map |
| |
| ChannelElement *cpe; ///< channel elements |
| FFPsyContext psy; |
| struct FFPsyPreprocessContext* psypp; |
| AACCoefficientsEncoder *coder; |
| int cur_channel; |
| int last_frame; |
| float lambda; |
| AudioFrameQueue afq; |
| DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients |
| DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients |
| |
| struct { |
| float *samples; |
| } buffer; |
| } AACEncContext; |
| |
| extern float ff_aac_pow34sf_tab[428]; |
| |
| void ff_aac_coder_init_mips(AACEncContext *c); |
| |
| #endif /* AVCODEC_AACENC_H */ |