Lines Matching defs:AC3DecodeContext
72 typedef struct AC3DecodeContext { struct
73 AVClass *class; ///< class for AVOptions
74 AVCodecContext *avctx; ///< parent context
75 GetBitContext gbc; ///< bitstream reader
79 int frame_type; ///< frame type (strmtyp)
80 int substreamid; ///< substream identification
81 int superframe_size; ///< current superframe size, in bytes
82 int frame_size; ///< current frame size, in bytes
83 int bit_rate; ///< stream bit rate, in bits-per-second
84 int sample_rate; ///< sample frequency, in Hz
85 int num_blocks; ///< number of audio blocks
86 int bitstream_id; ///< bitstream id (bsid)
87 int bitstream_mode; ///< bitstream mode (bsmod)
88 int channel_mode; ///< channel mode (acmod)
89 int lfe_on; ///< lfe channel in use
90 int dialog_normalization[2]; ///< dialog level in dBFS (dialnorm)
91 int compression_exists[2]; ///< compression field is valid for frame (compre)
92 int compression_gain[2]; ///< gain to apply for heavy compression (compr)
93 int channel_map; ///< custom channel map (chanmap)
94 int preferred_downmix; ///< Preferred 2-channel downmix mode (dmixmod)
95 int center_mix_level; ///< Center mix level index
96 … int center_mix_level_ltrt; ///< Center mix level index for Lt/Rt (ltrtcmixlev)
97 int surround_mix_level; ///< Surround mix level index
98 …int surround_mix_level_ltrt; ///< Surround mix level index for Lt/Rt (ltrtsurmixlev)
99 …int lfe_mix_level_exists; ///< indicates if lfemixlevcod is specified (lfemixlevcode)
100 … int lfe_mix_level; ///< LFE mix level index (lfemixlevcod)
101 int eac3; ///< indicates if current frame is E-AC-3
102 int eac3_frame_dependent_found; ///< bitstream has E-AC-3 dependent frame(s)
103 int eac3_subsbtreamid_found; ///< bitstream has E-AC-3 additional substream(s)
104 int dolby_surround_mode; ///< dolby surround mode (dsurmod)
105 int dolby_surround_ex_mode; ///< dolby surround ex mode (dsurexmod)
106 … int dolby_headphone_mode; ///< dolby headphone mode (dheadphonmod)
109 int preferred_stereo_downmix;
110 float ltrt_center_mix_level;
111 float ltrt_surround_mix_level;
112 float loro_center_mix_level;
113 float loro_surround_mix_level;
114 int target_level; ///< target level in dBFS
115 float level_gain[2];
118 … int snr_offset_strategy; ///< SNR offset strategy (snroffststr)
119 int block_switch_syntax; ///< block switch syntax enabled (blkswe)
120 int dither_flag_syntax; ///< dither flag syntax enabled (dithflage)
121 int bit_allocation_syntax; ///< bit allocation model syntax enabled (bamode)
122 … int fast_gain_syntax; ///< fast gain codes enabled (frmfgaincode)
123 int dba_syntax; ///< delta bit allocation syntax enabled (dbaflde)
124 int skip_syntax; ///< skip field syntax enabled (skipflde)
128 int cpl_in_use[AC3_MAX_BLOCKS]; ///< coupling in use (cplinu)
129 int cpl_strategy_exists[AC3_MAX_BLOCKS];///< coupling strategy exists (cplstre)
130 int channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl)
131 int phase_flags_in_use; ///< phase flags in use (phsflginu)
132 int phase_flags[AC3_MAX_CPL_BANDS]; ///< phase flags (phsflg)
133 int num_cpl_bands; ///< number of coupling bands (ncplbnd)
134 uint8_t cpl_band_struct[AC3_MAX_CPL_BANDS];
135 uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]; ///< number of coeffs in each coupling band
136 int firstchincpl; ///< first channel in coupling
137 … int first_cpl_coords[AC3_MAX_CHANNELS]; ///< first coupling coordinates states (firstcplcos)
138 int cpl_coords[AC3_MAX_CHANNELS][AC3_MAX_CPL_BANDS]; ///< coupling coordinates (cplco)
143 int spx_in_use; ///< spectral extension in use (spxinu)
144 … uint8_t channel_uses_spx[AC3_MAX_CHANNELS]; ///< channel uses spectral extension (chinspx)
145 …t8_t spx_atten_code[AC3_MAX_CHANNELS]; ///< spx attenuation code (spxattencod)
146 int spx_src_start_freq; ///< spx start frequency bin
147 int spx_dst_end_freq; ///< spx end frequency bin
148 …spx_dst_start_freq; ///< spx starting frequency bin for copying (copystartmant)
150 … int num_spx_bands; ///< number of spx bands (nspxbnds)
151 uint8_t spx_band_struct[SPX_MAX_BANDS];
152 uint8_t spx_band_sizes[SPX_MAX_BANDS]; ///< number of bins in each spx band
153 …nt8_t first_spx_coords[AC3_MAX_CHANNELS]; ///< first spx coordinates states (firstspxcos)
154 …LOAT spx_noise_blend[AC3_MAX_CHANNELS][SPX_MAX_BANDS]; ///< spx noise blending factor (nblendfact)
155 …LOAT spx_signal_blend[AC3_MAX_CHANNELS][SPX_MAX_BANDS];///< spx signal blending factor (sblendfact)
159 … int channel_uses_aht[AC3_MAX_CHANNELS]; ///< channel AHT in use (chahtinu)
160 int pre_mantissa[AC3_MAX_CHANNELS][AC3_MAX_COEFS][AC3_MAX_BLOCKS]; ///< pre-IDCT mantissas
164 int fbw_channels; ///< number of full-bandwidth channels
165 int channels; ///< number of total channels
166 int lfe_ch; ///< index of LFE channel
167 SHORTFLOAT *downmix_coeffs[2]; ///< stereo downmix coefficients
168 int downmixed; ///< indicates if coeffs are currently downmixed
169 int output_mode; ///< output channel configuration
170 int prev_output_mode; ///< output channel configuration for previous frame
171 int out_channels; ///< number of output channels
172 …prev_bit_rate; ///< stream bit rate, in bits-per-second for previous frame
176 INTFLOAT dynamic_range[2]; ///< dynamic range
177 …TFLOAT drc_scale; ///< percentage of dynamic range compression to be applied
178 int heavy_compression; ///< apply heavy compression
179 INTFLOAT heavy_dynamic_range[2]; ///< heavy dynamic range compression
183 int start_freq[AC3_MAX_CHANNELS]; ///< start frequency bin (strtmant)
184 int end_freq[AC3_MAX_CHANNELS]; ///< end frequency bin (endmant)
188 int consistent_noise_generation; ///< seed noise generation with AC-3 frame on decode
192 int num_rematrixing_bands; ///< number of rematrixing bands (nrematbnd)
193 int rematrixing_flags[4]; ///< rematrixing flags (rematflg)
197 int num_exp_groups[AC3_MAX_CHANNELS]; ///< Number of exponent groups (nexpgrp)
198 int8_t dexps[AC3_MAX_CHANNELS][AC3_MAX_COEFS]; ///< decoded exponents
199 int exp_strategy[AC3_MAX_BLOCKS][AC3_MAX_CHANNELS]; ///< exponent strategies (expstr)
203 AC3BitAllocParameters bit_alloc_params; ///< bit allocation parameters
204 … int first_cpl_leak; ///< first coupling leak state (firstcplleak)
205 int snr_offset[AC3_MAX_CHANNELS]; ///< signal-to-noise ratio offsets (snroffst)
206 int fast_gain[AC3_MAX_CHANNELS]; ///< fast gain values/SMR's (fgain)
207 uint8_t bap[AC3_MAX_CHANNELS][AC3_MAX_COEFS]; ///< bit allocation pointers
208 int16_t psd[AC3_MAX_CHANNELS][AC3_MAX_COEFS]; ///< scaled exponents
209 int16_t band_psd[AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]; ///< interpolated exponents
210 int16_t mask[AC3_MAX_CHANNELS][AC3_CRITICAL_BANDS]; ///< masking curve values
211 int dba_mode[AC3_MAX_CHANNELS]; ///< delta bit allocation mode
212 int dba_nsegs[AC3_MAX_CHANNELS]; ///< number of delta segments
213 uint8_t dba_offsets[AC3_MAX_CHANNELS][8]; ///< delta segment offsets
214 uint8_t dba_lengths[AC3_MAX_CHANNELS][8]; ///< delta segment lengths
215 uint8_t dba_values[AC3_MAX_CHANNELS][8]; ///< delta values for each segment
219 int dither_flag[AC3_MAX_CHANNELS]; ///< dither flags (dithflg)
220 AVLFG dith_state; ///< for dither generation
224 int block_switch[AC3_MAX_CHANNELS]; ///< block switch flags (blksw)
225 FFTContext imdct_512; ///< for 512 sample IMDCT
226 FFTContext imdct_256; ///< for 256 sample IMDCT
230 BswapDSPContext bdsp;
254 } AC3DecodeContext; typedef