mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 08:12:44 +00:00
151 lines
7.4 KiB
C
151 lines
7.4 KiB
C
/*
|
|
* 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
|