mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
305 lines
13 KiB
305 lines
13 KiB
/* |
|
* DCA compatible decoder |
|
* Copyright (C) 2004 Gildas Bazin |
|
* Copyright (C) 2004 Benjamin Zores |
|
* Copyright (C) 2006 Benjamin Larsson |
|
* Copyright (C) 2007 Konstantin Shishkov |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#ifndef AVCODEC_DCA_H |
|
#define AVCODEC_DCA_H |
|
|
|
#include <stdint.h> |
|
|
|
#include "libavutil/float_dsp.h" |
|
#include "libavutil/internal.h" |
|
|
|
#include "avcodec.h" |
|
#include "dcadsp.h" |
|
#include "fmtconvert.h" |
|
#include "get_bits.h" |
|
|
|
#define DCA_PRIM_CHANNELS_MAX (7) |
|
#define DCA_ABITS_MAX (32) /* Should be 28 */ |
|
#define DCA_SUBSUBFRAMES_MAX (4) |
|
#define DCA_SUBFRAMES_MAX (16) |
|
#define DCA_BLOCKS_MAX (16) |
|
#define DCA_LFE_MAX (3) |
|
|
|
#define DCA_PRIM_CHANNELS_MAX (7) |
|
#define DCA_ABITS_MAX (32) /* Should be 28 */ |
|
#define DCA_SUBSUBFRAMES_MAX (4) |
|
#define DCA_SUBFRAMES_MAX (16) |
|
#define DCA_BLOCKS_MAX (16) |
|
#define DCA_LFE_MAX (3) |
|
#define DCA_XLL_FBANDS_MAX (4) |
|
#define DCA_XLL_SEGMENTS_MAX (16) |
|
#define DCA_XLL_CHSETS_MAX (16) |
|
#define DCA_XLL_CHANNELS_MAX (16) |
|
#define DCA_XLL_AORDER_MAX (15) |
|
|
|
/* Arbitrary limit; not sure what the maximum really is, but much larger. */ |
|
#define DCA_XLL_DMIX_NCOEFFS_MAX (18) |
|
|
|
#define DCA_MAX_FRAME_SIZE 16384 |
|
#define DCA_MAX_EXSS_HEADER_SIZE 4096 |
|
|
|
#define DCA_BUFFER_PADDING_SIZE 1024 |
|
|
|
enum DCAExtensionMask { |
|
DCA_EXT_CORE = 0x001, ///< core in core substream |
|
DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream |
|
DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream |
|
DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream |
|
DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream) |
|
DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS |
|
DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS |
|
DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS |
|
DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS |
|
DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS |
|
}; |
|
|
|
typedef struct XllChSetSubHeader { |
|
int channels; ///< number of channels in channel set, at most 16 |
|
int residual_encode; ///< residual channel encoding |
|
int bit_resolution; ///< input sample bit-width |
|
int bit_width; ///< original input sample bit-width |
|
int sampling_frequency; ///< sampling frequency |
|
int samp_freq_interp; ///< sampling frequency interpolation multiplier |
|
int replacement_set; ///< replacement channel set group |
|
int active_replace_set; ///< current channel set is active channel set |
|
int primary_ch_set; |
|
int downmix_coeff_code_embedded; |
|
int downmix_embedded; |
|
int downmix_type; |
|
int hier_chset; ///< hierarchical channel set |
|
int downmix_ncoeffs; |
|
int downmix_coeffs[DCA_XLL_DMIX_NCOEFFS_MAX]; |
|
int ch_mask_enabled; |
|
int ch_mask; |
|
int mapping_coeffs_present; |
|
int num_freq_bands; |
|
|
|
/* m_nOrigChanOrder */ |
|
uint8_t orig_chan_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
uint8_t orig_chan_order_inv[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
/* Coefficients for channel pairs (at most 8), m_anPWChPairsCoeffs */ |
|
int8_t pw_ch_pairs_coeffs[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX/2]; |
|
/* m_nCurrHighestLPCOrder */ |
|
uint8_t adapt_order_max[DCA_XLL_FBANDS_MAX]; |
|
/* m_pnAdaptPredOrder */ |
|
uint8_t adapt_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
/* m_pnFixedPredOrder */ |
|
uint8_t fixed_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
/* m_pnLPCReflCoeffsQInd, unsigned version */ |
|
uint8_t lpc_refl_coeffs_q_ind[DCA_XLL_FBANDS_MAX] |
|
[DCA_XLL_CHANNELS_MAX][DCA_XLL_AORDER_MAX]; |
|
|
|
int lsb_fsize[DCA_XLL_FBANDS_MAX]; |
|
int8_t scalable_lsbs[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
int8_t bit_width_adj_per_ch[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX]; |
|
} XllChSetSubHeader; |
|
|
|
typedef struct XllNavi { |
|
GetBitContext gb; // Context for parsing the data segments |
|
unsigned band_size[DCA_XLL_FBANDS_MAX]; |
|
unsigned segment_size[DCA_XLL_FBANDS_MAX][DCA_XLL_SEGMENTS_MAX]; |
|
unsigned chset_size[DCA_XLL_FBANDS_MAX][DCA_XLL_SEGMENTS_MAX][DCA_XLL_CHSETS_MAX]; |
|
} XllNavi; |
|
|
|
typedef struct QMF64_table { |
|
float dct4_coeff[32][32]; |
|
float dct2_coeff[32][32]; |
|
float rcos[32]; |
|
float rsin[32]; |
|
} QMF64_table; |
|
|
|
/* Primary audio coding header */ |
|
typedef struct DCAAudioHeader { |
|
int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count |
|
int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband |
|
int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index |
|
int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book |
|
int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book |
|
int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select |
|
int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select |
|
uint32_t scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment |
|
|
|
int subframes; ///< number of subframes |
|
int total_channels; ///< number of channels including extensions |
|
int prim_channels; ///< number of primary audio channels |
|
} DCAAudioHeader; |
|
|
|
typedef struct DCAChan { |
|
DECLARE_ALIGNED(32, int32_t, subband_samples)[DCA_BLOCKS_MAX][DCA_SUBBANDS][SAMPLES_PER_SUBBAND]; |
|
|
|
/* Subband samples history (for ADPCM) */ |
|
DECLARE_ALIGNED(32, int32_t, subband_samples_hist)[DCA_SUBBANDS][4]; |
|
int hist_index; |
|
|
|
/* Half size is sufficient for core decoding, but for 96 kHz data |
|
* we need QMF with 64 subbands and 1024 samples. */ |
|
DECLARE_ALIGNED(32, float, subband_fir_hist)[1024]; |
|
DECLARE_ALIGNED(32, float, subband_fir_noidea)[64]; |
|
|
|
/* Primary audio coding side information */ |
|
int prediction_mode[DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not) |
|
int prediction_vq[DCA_SUBBANDS]; ///< prediction VQ coefs |
|
int bitalloc[DCA_SUBBANDS]; ///< bit allocation index |
|
int transition_mode[DCA_SUBBANDS]; ///< transition mode (transients) |
|
int32_t scale_factor[DCA_SUBBANDS][2];///< scale factors (2 if transient) |
|
int joint_huff; ///< joint subband scale factors codebook |
|
int joint_scale_factor[DCA_SUBBANDS]; ///< joint subband scale factors |
|
|
|
int32_t high_freq_vq[DCA_SUBBANDS]; ///< VQ encoded high frequency subbands |
|
} DCAChan; |
|
|
|
|
|
typedef struct DCAContext { |
|
AVClass *class; ///< class for AVOptions |
|
AVCodecContext *avctx; |
|
/* Frame header */ |
|
int frame_type; ///< type of the current frame |
|
int samples_deficit; ///< deficit sample count |
|
int crc_present; ///< crc is present in the bitstream |
|
int sample_blocks; ///< number of PCM sample blocks |
|
int frame_size; ///< primary frame byte size |
|
int amode; ///< audio channels arrangement |
|
int sample_rate; ///< audio sampling rate |
|
int bit_rate; ///< transmission bit rate |
|
int bit_rate_index; ///< transmission bit rate index |
|
|
|
int dynrange; ///< embedded dynamic range flag |
|
int timestamp; ///< embedded time stamp flag |
|
int aux_data; ///< auxiliary data flag |
|
int hdcd; ///< source material is mastered in HDCD |
|
int ext_descr; ///< extension audio descriptor flag |
|
int ext_coding; ///< extended coding flag |
|
int aspf; ///< audio sync word insertion flag |
|
int lfe; ///< low frequency effects flag |
|
int predictor_history; ///< predictor history flag |
|
int header_crc; ///< header crc check bytes |
|
int multirate_inter; ///< multirate interpolator switch |
|
int version; ///< encoder software revision |
|
int copy_history; ///< copy history |
|
int source_pcm_res; ///< source pcm resolution |
|
int front_sum; ///< front sum/difference flag |
|
int surround_sum; ///< surround sum/difference flag |
|
int dialog_norm; ///< dialog normalisation parameter |
|
|
|
/* Primary audio coding header */ |
|
DCAAudioHeader audio_header; |
|
|
|
/* Primary audio coding side information */ |
|
int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes |
|
int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count |
|
float downmix_coef[DCA_PRIM_CHANNELS_MAX + 1][2]; ///< stereo downmix coefficients |
|
int dynrange_coef; ///< dynamic range coefficient |
|
|
|
/* Core substream's embedded downmix coefficients (cf. ETSI TS 102 114 V1.4.1) |
|
* Input: primary audio channels (incl. LFE if present) |
|
* Output: downmix audio channels (up to 4, no LFE) */ |
|
uint8_t core_downmix; ///< embedded downmix coefficients available |
|
uint8_t core_downmix_amode; ///< audio channel arrangement of embedded downmix |
|
uint16_t core_downmix_codes[DCA_PRIM_CHANNELS_MAX + 1][4]; ///< embedded downmix coefficients (9-bit codes) |
|
|
|
|
|
float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data |
|
int lfe_scale_factor; |
|
|
|
/* Subband samples history (for ADPCM) */ |
|
DECLARE_ALIGNED(32, float, raXin)[32]; |
|
|
|
DCAChan dca_chan[DCA_PRIM_CHANNELS_MAX]; |
|
|
|
int output; ///< type of output |
|
|
|
float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1]; |
|
float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1]; |
|
uint8_t *extra_channels_buffer; |
|
unsigned int extra_channels_buffer_size; |
|
|
|
uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE]; |
|
int dca_buffer_size; ///< how much data is in the dca_buffer |
|
|
|
const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe |
|
GetBitContext gb; |
|
/* Current position in DCA frame */ |
|
int current_subframe; |
|
int current_subsubframe; |
|
|
|
int core_ext_mask; ///< present extensions in the core substream |
|
int exss_ext_mask; ///< Non-core extensions |
|
|
|
/* XCh extension information */ |
|
int xch_present; ///< XCh extension present and valid |
|
int xch_base_channel; ///< index of first (only) channel containing XCH data |
|
int xch_disable; ///< whether the XCh extension should be decoded or not |
|
|
|
/* XLL extension information */ |
|
int xll_disable; |
|
int xll_nch_sets; ///< number of channel sets per frame |
|
int xll_channels; ///< total number of channels (in all channel sets) |
|
int xll_residual_channels; ///< number of residual channels |
|
int xll_segments; ///< number of segments per frame |
|
int xll_log_smpl_in_seg; ///< supposedly this is "nBits4SamplLoci" |
|
int xll_smpl_in_seg; ///< samples in segment per one frequency band for the first channel set |
|
int xll_bits4seg_size; ///< number of bits used to read segment size |
|
int xll_banddata_crc; ///< presence of CRC16 within each frequency band |
|
int xll_scalable_lsb; |
|
int xll_bits4ch_mask; ///< channel position mask |
|
int xll_fixed_lsb_width; |
|
XllChSetSubHeader xll_chsets[DCA_XLL_CHSETS_MAX]; |
|
XllNavi xll_navi; |
|
int *xll_sample_buf; |
|
unsigned int xll_sample_buf_size; |
|
|
|
/* ExSS header parser */ |
|
int static_fields; ///< static fields present |
|
int mix_metadata; ///< mixing metadata present |
|
int num_mix_configs; ///< number of mix out configurations |
|
int mix_config_num_ch[4]; ///< number of channels in each mix out configuration |
|
|
|
int profile; |
|
int one2one_map_chtospkr; |
|
|
|
int debug_flag; ///< used for suppressing repeated error messages output |
|
AVFloatDSPContext fdsp; |
|
FFTContext imdct; |
|
SynthFilterContext synth; |
|
DCADSPContext dcadsp; |
|
QMF64_table *qmf64_table; |
|
FmtConvertContext fmt_conv; |
|
} DCAContext; |
|
|
|
extern av_export const uint32_t avpriv_dca_sample_rates[16]; |
|
|
|
/** |
|
* Convert bitstream to one representation based on sync marker |
|
*/ |
|
int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, |
|
int max_size); |
|
|
|
void ff_dca_exss_parse_header(DCAContext *s); |
|
|
|
int ff_dca_xll_decode_header(DCAContext *s); |
|
int ff_dca_xll_decode_navi(DCAContext *s, int asset_end); |
|
int ff_dca_xll_decode_audio(DCAContext *s, AVFrame *frame); |
|
|
|
#endif /* AVCODEC_DCA_H */
|
|
|