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147 lines
7.1 KiB
147 lines
7.1 KiB
/* |
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* Copyright (C) 2016 foo86 |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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_DCA_XLL_H |
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#define AVCODEC_DCA_XLL_H |
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#include "libavutil/mem_internal.h" |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "dca.h" |
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#include "dcadsp.h" |
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#include "dca_exss.h" |
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#define DCA_XLL_CHSETS_MAX 3 |
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#define DCA_XLL_CHANNELS_MAX 8 |
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#define DCA_XLL_BANDS_MAX 2 |
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#define DCA_XLL_ADAPT_PRED_ORDER_MAX 16 |
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#define DCA_XLL_DECI_HISTORY_MAX 8 |
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#define DCA_XLL_DMIX_SCALES_MAX ((DCA_XLL_CHSETS_MAX - 1) * DCA_XLL_CHANNELS_MAX) |
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#define DCA_XLL_DMIX_COEFFS_MAX (DCA_XLL_DMIX_SCALES_MAX * DCA_XLL_CHANNELS_MAX) |
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#define DCA_XLL_PBR_BUFFER_MAX (240 << 10) |
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#define DCA_XLL_SAMPLE_BUFFERS_MAX 3 |
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typedef struct DCAXllBand { |
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int decor_enabled; ///< Pairwise channel decorrelation flag |
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int orig_order[DCA_XLL_CHANNELS_MAX]; ///< Original channel order |
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int decor_coeff[DCA_XLL_CHANNELS_MAX / 2]; ///< Pairwise channel coefficients |
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int adapt_pred_order[DCA_XLL_CHANNELS_MAX]; ///< Adaptive predictor order |
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int highest_pred_order; ///< Highest adaptive predictor order |
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int fixed_pred_order[DCA_XLL_CHANNELS_MAX]; ///< Fixed predictor order |
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int adapt_refl_coeff[DCA_XLL_CHANNELS_MAX][DCA_XLL_ADAPT_PRED_ORDER_MAX]; ///< Adaptive predictor reflection coefficients |
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int dmix_embedded; ///< Downmix performed by encoder in frequency band |
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int lsb_section_size; ///< Size of LSB section in any segment |
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int nscalablelsbs[DCA_XLL_CHANNELS_MAX]; ///< Number of bits to represent the samples in LSB part |
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int bit_width_adjust[DCA_XLL_CHANNELS_MAX]; ///< Number of bits discarded by authoring |
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int32_t *msb_sample_buffer[DCA_XLL_CHANNELS_MAX]; ///< MSB sample buffer pointers |
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int32_t *lsb_sample_buffer[DCA_XLL_CHANNELS_MAX]; ///< LSB sample buffer pointers or NULL |
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} DCAXllBand; |
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typedef struct DCAXllChSet { |
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// Channel set header |
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int nchannels; ///< Number of channels in the channel set (N) |
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int residual_encode; ///< Residual encoding mask (0 - residual, 1 - full channel) |
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int pcm_bit_res; ///< PCM bit resolution (variable) |
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int storage_bit_res; ///< Storage bit resolution (16 or 24) |
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int freq; ///< Original sampling frequency (max. 96000 Hz) |
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int primary_chset; ///< Primary channel set flag |
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int dmix_coeffs_present; ///< Downmix coefficients present in stream |
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int dmix_embedded; ///< Downmix already performed by encoder |
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int dmix_type; ///< Primary channel set downmix type |
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int hier_chset; ///< Whether the channel set is part of a hierarchy |
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int hier_ofs; ///< Number of preceding channels in a hierarchy (M) |
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int dmix_coeff[DCA_XLL_DMIX_COEFFS_MAX]; ///< Downmixing coefficients |
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int dmix_scale[DCA_XLL_DMIX_SCALES_MAX]; ///< Downmixing scales |
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int dmix_scale_inv[DCA_XLL_DMIX_SCALES_MAX]; ///< Inverse downmixing scales |
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int ch_mask; ///< Channel mask for set |
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int ch_remap[DCA_XLL_CHANNELS_MAX]; ///< Channel to speaker map |
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int nfreqbands; ///< Number of frequency bands (1 or 2) |
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int nabits; ///< Number of bits to read bit allocation coding parameter |
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DCAXllBand bands[DCA_XLL_BANDS_MAX]; ///< Frequency bands |
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// Frequency band coding parameters |
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int seg_common; ///< Segment type |
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int rice_code_flag[DCA_XLL_CHANNELS_MAX]; ///< Rice coding flag |
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int bitalloc_hybrid_linear[DCA_XLL_CHANNELS_MAX]; ///< Binary code length for isolated samples |
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int bitalloc_part_a[DCA_XLL_CHANNELS_MAX]; ///< Coding parameter for part A of segment |
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int bitalloc_part_b[DCA_XLL_CHANNELS_MAX]; ///< Coding parameter for part B of segment |
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int nsamples_part_a[DCA_XLL_CHANNELS_MAX]; ///< Number of samples in part A of segment |
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// Decimator history |
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DECLARE_ALIGNED(32, int32_t, deci_history)[DCA_XLL_CHANNELS_MAX][DCA_XLL_DECI_HISTORY_MAX]; ///< Decimator history for frequency band 1 |
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// Sample buffers |
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unsigned int sample_size[DCA_XLL_SAMPLE_BUFFERS_MAX]; |
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int32_t *sample_buffer[DCA_XLL_SAMPLE_BUFFERS_MAX]; |
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} DCAXllChSet; |
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typedef struct DCAXllDecoder { |
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AVCodecContext *avctx; |
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GetBitContext gb; |
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int frame_size; ///< Number of bytes in a lossless frame |
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int nchsets; ///< Number of channels sets per frame |
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int nframesegs; ///< Number of segments per frame |
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int nsegsamples_log2; ///< log2(nsegsamples) |
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int nsegsamples; ///< Samples in segment per one frequency band |
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int nframesamples_log2; ///< log2(nframesamples) |
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int nframesamples; ///< Samples in frame per one frequency band |
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int seg_size_nbits; ///< Number of bits used to read segment size |
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int band_crc_present; ///< Presence of CRC16 within each frequency band |
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int scalable_lsbs; ///< MSB/LSB split flag |
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int ch_mask_nbits; ///< Number of bits used to read channel mask |
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int fixed_lsb_width; ///< Fixed LSB width |
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DCAXllChSet chset[DCA_XLL_CHSETS_MAX]; ///< Channel sets |
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int *navi; ///< NAVI table |
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unsigned int navi_size; |
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int nfreqbands; ///< Highest number of frequency bands |
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int nchannels; ///< Total number of channels in a hierarchy |
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int nreschsets; ///< Number of channel sets that have residual encoded channels |
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int nactivechsets; ///< Number of active channel sets to decode |
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int hd_stream_id; ///< Previous DTS-HD stream ID for detecting changes |
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uint8_t *pbr_buffer; ///< Peak bit rate (PBR) smoothing buffer |
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int pbr_length; ///< Length in bytes of data currently buffered |
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int pbr_delay; ///< Delay in frames before decoding buffered data |
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DCADSPContext *dcadsp; |
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int output_mask; |
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int32_t *output_samples[DCA_SPEAKER_COUNT]; |
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} DCAXllDecoder; |
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int ff_dca_xll_parse(DCAXllDecoder *s, const uint8_t *data, DCAExssAsset *asset); |
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int ff_dca_xll_filter_frame(DCAXllDecoder *s, AVFrame *frame); |
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av_cold void ff_dca_xll_flush(DCAXllDecoder *s); |
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av_cold void ff_dca_xll_close(DCAXllDecoder *s); |
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#endif
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