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77 lines
2.8 KiB
77 lines
2.8 KiB
/* |
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* AAC encoder |
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* Copyright (C) 2008 Konstantin Shishkov |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_AACENC_H |
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#define AVCODEC_AACENC_H |
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#include "avcodec.h" |
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#include "put_bits.h" |
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#include "dsputil.h" |
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#include "aac.h" |
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#include "psymodel.h" |
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typedef struct AACEncOptions { |
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int stereo_mode; |
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} AACEncOptions; |
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struct AACEncContext; |
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typedef struct AACCoefficientsEncoder { |
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void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s, |
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SingleChannelElement *sce, const float lambda); |
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void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce, |
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int win, int group_len, const float lambda); |
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void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size, |
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int scale_idx, int cb, const float lambda); |
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void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda); |
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} AACCoefficientsEncoder; |
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extern AACCoefficientsEncoder ff_aac_coders[]; |
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/** |
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* AAC encoder context |
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*/ |
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typedef struct AACEncContext { |
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AVClass *av_class; |
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AACEncOptions options; ///< encoding options |
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PutBitContext pb; |
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FFTContext mdct1024; ///< long (1024 samples) frame transform context |
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FFTContext mdct128; ///< short (128 samples) frame transform context |
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DSPContext dsp; |
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int16_t *samples; ///< saved preprocessed input |
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int samplerate_index; ///< MPEG-4 samplerate index |
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const uint8_t *chan_map; ///< channel configuration map |
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ChannelElement *cpe; ///< channel elements |
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FFPsyContext psy; |
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struct FFPsyPreprocessContext* psypp; |
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AACCoefficientsEncoder *coder; |
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int cur_channel; |
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int last_frame; |
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float lambda; |
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DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients |
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DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients |
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} AACEncContext; |
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#endif /* AVCODEC_AACENC_H */
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