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