FFmpeg
dca_core.h
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20 
21 #ifndef AVCODEC_DCA_CORE_H
22 #define AVCODEC_DCA_CORE_H
23 
24 #include "libavutil/float_dsp.h"
25 #include "libavutil/fixed_dsp.h"
26 #include "libavutil/mem_internal.h"
27 #include "libavutil/tx.h"
28 
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "dca.h"
32 #include "dca_exss.h"
33 #include "dcadsp.h"
34 #include "dcadct.h"
35 #include "dcamath.h"
36 #include "dcahuff.h"
37 #include "synth_filter.h"
38 
39 #define DCA_CHANNELS 7
40 #define DCA_SUBBANDS 32
41 #define DCA_SUBBANDS_X96 64
42 #define DCA_SUBFRAMES 16
43 #define DCA_SUBBAND_SAMPLES 8
44 #define DCA_PCMBLOCK_SAMPLES 32
45 #define DCA_LFE_HISTORY 8
46 #define DCA_ABITS_MAX 26
47 
48 #define DCA_CORE_CHANNELS_MAX 6
49 #define DCA_DMIX_CHANNELS_MAX 4
50 #define DCA_XXCH_CHANNELS_MAX 2
51 #define DCA_EXSS_CHANNELS_MAX 8
52 #define DCA_EXSS_CHSETS_MAX 4
53 
54 #define DCA_FILTER_MODE_X96 0x01
55 #define DCA_FILTER_MODE_FIXED 0x02
56 
58  DCA_AMODE_MONO, // Mode 0: A (mono)
59  DCA_AMODE_MONO_DUAL, // Mode 1: A + B (dual mono)
60  DCA_AMODE_STEREO, // Mode 2: L + R (stereo)
61  DCA_AMODE_STEREO_SUMDIFF, // Mode 3: (L+R) + (L-R) (sum-diff)
62  DCA_AMODE_STEREO_TOTAL, // Mode 4: LT + RT (left and right total)
63  DCA_AMODE_3F, // Mode 5: C + L + R
64  DCA_AMODE_2F1R, // Mode 6: L + R + S
65  DCA_AMODE_3F1R, // Mode 7: C + L + R + S
66  DCA_AMODE_2F2R, // Mode 8: L + R + SL + SR
67  DCA_AMODE_3F2R, // Mode 9: C + L + R + SL + SR
68 
70 };
71 
76 };
77 
83 };
84 
85 typedef struct DCADSPData {
86  union {
87  struct {
88  DECLARE_ALIGNED(32, float, hist1)[1024];
89  DECLARE_ALIGNED(32, float, hist2)[64];
90  } flt;
91  struct {
94  } fix;
95  } u;
96  int offset;
97 } DCADSPData;
98 
99 typedef struct DCACoreDecoder {
103 
104  // Bit stream header
105  int crc_present; ///< CRC present flag
106  int npcmblocks; ///< Number of PCM sample blocks
107  int frame_size; ///< Primary frame byte size
108  int audio_mode; ///< Audio channel arrangement
109  int sample_rate; ///< Core audio sampling frequency
110  int bit_rate; ///< Transmission bit rate
111  int drc_present; ///< Embedded dynamic range flag
112  int ts_present; ///< Embedded time stamp flag
113  int aux_present; ///< Auxiliary data flag
114  int ext_audio_type; ///< Extension audio descriptor flag
115  int ext_audio_present; ///< Extended coding flag
116  int sync_ssf; ///< Audio sync word insertion flag
117  int lfe_present; ///< Low frequency effects flag
118  int predictor_history; ///< Predictor history flag switch
119  int filter_perfect; ///< Multirate interpolator switch
120  int source_pcm_res; ///< Source PCM resolution
121  int es_format; ///< Extended surround (ES) mastering flag
122  int sumdiff_front; ///< Front sum/difference flag
123  int sumdiff_surround; ///< Surround sum/difference flag
124 
125  // Primary audio coding header
126  int nsubframes; ///< Number of subframes
127  int nchannels; ///< Number of primary audio channels (incl. extension channels)
128  int ch_mask; ///< Speaker layout mask (incl. LFE and extension channels)
129  int8_t nsubbands[DCA_CHANNELS]; ///< Subband activity count
130  int8_t subband_vq_start[DCA_CHANNELS]; ///< High frequency VQ start subband
131  int8_t joint_intensity_index[DCA_CHANNELS]; ///< Joint intensity coding index
132  int8_t transition_mode_sel[DCA_CHANNELS]; ///< Transient mode code book
133  int8_t scale_factor_sel[DCA_CHANNELS]; ///< Scale factor code book
134  int8_t bit_allocation_sel[DCA_CHANNELS]; ///< Bit allocation quantizer select
135  int8_t quant_index_sel[DCA_CHANNELS][DCA_CODE_BOOKS]; ///< Quantization index codebook select
136  int32_t scale_factor_adj[DCA_CHANNELS][DCA_CODE_BOOKS]; ///< Scale factor adjustment
137 
138  // Primary audio coding side information
139  int8_t nsubsubframes[DCA_SUBFRAMES]; ///< Subsubframe count for each subframe
140  int8_t prediction_mode[DCA_CHANNELS][DCA_SUBBANDS_X96]; ///< Prediction mode
141  int16_t prediction_vq_index[DCA_CHANNELS][DCA_SUBBANDS_X96]; ///< Prediction coefficients VQ address
142  int8_t bit_allocation[DCA_CHANNELS][DCA_SUBBANDS_X96]; ///< Bit allocation index
143  int8_t transition_mode[DCA_SUBFRAMES][DCA_CHANNELS][DCA_SUBBANDS]; ///< Transition mode
144  int32_t scale_factors[DCA_CHANNELS][DCA_SUBBANDS][2]; ///< Scale factors (2x for transients and X96)
145  int8_t joint_scale_sel[DCA_CHANNELS]; ///< Joint subband codebook select
146  int32_t joint_scale_factors[DCA_CHANNELS][DCA_SUBBANDS_X96]; ///< Scale factors for joint subband coding
147 
148  // Auxiliary data
149  int prim_dmix_embedded; ///< Auxiliary dynamic downmix flag
150  int prim_dmix_type; ///< Auxiliary primary channel downmix type
151  int prim_dmix_coeff[DCA_DMIX_CHANNELS_MAX * DCA_CORE_CHANNELS_MAX]; ///< Dynamic downmix code coefficients
152 
153  // Core extensions
154  int ext_audio_mask; ///< Bit mask of fully decoded core extensions
155 
156  // XCH extension data
157  int xch_pos; ///< Bit position of XCH frame in core substream
158 
159  // XXCH extension data
160  int xxch_crc_present; ///< CRC presence flag for XXCH channel set header
161  int xxch_mask_nbits; ///< Number of bits for loudspeaker mask
162  int xxch_core_mask; ///< Core loudspeaker activity mask
163  int xxch_spkr_mask; ///< Loudspeaker layout mask
164  int xxch_dmix_embedded; ///< Downmix already performed by encoder
165  int xxch_dmix_scale_inv; ///< Downmix scale factor
166  int xxch_dmix_mask[DCA_XXCH_CHANNELS_MAX]; ///< Downmix channel mapping mask
168  int xxch_pos; ///< Bit position of XXCH frame in core substream
169 
170  // X96 extension data
171  int x96_rev_no; ///< X96 revision number
172  int x96_crc_present; ///< CRC presence flag for X96 channel set header
173  int x96_nchannels; ///< Number of primary channels in X96 extension
174  int x96_high_res; ///< X96 high resolution flag
175  int x96_subband_start; ///< First encoded subband in X96 extension
176  int x96_rand; ///< Random seed for generating samples for unallocated X96 subbands
177  int x96_pos; ///< Bit position of X96 frame in core substream
178 
179  // Sample buffers
180  unsigned int x96_subband_size;
181  int32_t *x96_subband_buffer; ///< X96 subband sample buffer base
183 
184  unsigned int subband_size;
185  int32_t *subband_buffer; ///< Subband sample buffer base
187  int32_t *lfe_samples; ///< Decimated LFE samples
188 
189  // DSP contexts
190  DCADSPData dcadsp_data[DCA_CHANNELS]; ///< FIR history buffers
198 
199  // PCM output data
200  unsigned int output_size;
201  void *output_buffer; ///< PCM output buffer base
202  int32_t *output_samples[DCA_SPEAKER_COUNT]; ///< PCM output for fixed point mode
203  int32_t output_history_lfe_fixed; ///< LFE PCM history for X96 filter
204  float output_history_lfe_float; ///< LFE PCM history for X96 filter
205 
206  int ch_remap[DCA_SPEAKER_COUNT]; ///< Channel to speaker map
207  int request_mask; ///< Requested channel layout (for stereo downmix)
208 
209  int npcmsamples; ///< Number of PCM samples per channel
210  int output_rate; ///< Output sample rate (1x or 2x header rate)
211 
212  int filter_mode; ///< Previous filtering mode for detecting changes
214 
215 static inline int ff_dca_core_map_spkr(DCACoreDecoder *core, int spkr)
216 {
217  if (core->ch_mask & (1U << spkr))
218  return spkr;
219  if (spkr == DCA_SPEAKER_Lss && (core->ch_mask & DCA_SPEAKER_MASK_Ls))
220  return DCA_SPEAKER_Ls;
221  if (spkr == DCA_SPEAKER_Rss && (core->ch_mask & DCA_SPEAKER_MASK_Rs))
222  return DCA_SPEAKER_Rs;
223  return -1;
224 }
225 
226 static inline void ff_dca_core_dequantize(int32_t *output, const int32_t *input,
227  int32_t step_size, int32_t scale, int residual, int len)
228 {
229  // Account for quantizer step size
230  int64_t step_scale = (int64_t)step_size * scale;
231  int n, shift = 0;
232 
233  // Limit scale factor resolution to 22 bits
234  if (step_scale > (1 << 23)) {
235  shift = av_log2(step_scale >> 23) + 1;
236  step_scale >>= shift;
237  }
238 
239  // Scale the samples
240  if (residual) {
241  for (n = 0; n < len; n++)
242  output[n] += clip23(norm__(input[n] * step_scale, 22 - shift));
243  } else {
244  for (n = 0; n < len; n++)
245  output[n] = clip23(norm__(input[n] * step_scale, 22 - shift));
246  }
247 }
248 
249 int ff_dca_core_parse(DCACoreDecoder *s, const uint8_t *data, int size);
250 int ff_dca_core_parse_exss(DCACoreDecoder *s, const uint8_t *data, DCAExssAsset *asset);
251 int ff_dca_core_filter_fixed(DCACoreDecoder *s, int x96_synth);
256 
257 #endif
dcamath.h
DCACoreDecoder::filter_mode
int filter_mode
Previous filtering mode for detecting changes.
Definition: dca_core.h:212
DCACoreDecoder::joint_scale_factors
int32_t joint_scale_factors[DCA_CHANNELS][DCA_SUBBANDS_X96]
Scale factors for joint subband coding.
Definition: dca_core.h:146
DCA_SPEAKER_Lss
@ DCA_SPEAKER_Lss
Definition: dca.h:80
DCACoreDecoder::joint_scale_sel
int8_t joint_scale_sel[DCA_CHANNELS]
Joint subband codebook select.
Definition: dca_core.h:145
DCACoreDecoder::gb_in
GetBitContext gb_in
Definition: dca_core.h:102
DCA_LFE_FLAG_INVALID
@ DCA_LFE_FLAG_INVALID
Definition: dca_core.h:82
DCA_EXT_AUDIO_X96
@ DCA_EXT_AUDIO_X96
Definition: dca_core.h:74
mem_internal.h
DCA_LFE_FLAG_NONE
@ DCA_LFE_FLAG_NONE
Definition: dca_core.h:79
dca.h
DCACoreDecoder::lfe_present
int lfe_present
Low frequency effects flag.
Definition: dca_core.h:117
DCACoreDecoder::npcmsamples
int npcmsamples
Number of PCM samples per channel.
Definition: dca_core.h:209
DCACoreDecoder::ts_present
int ts_present
Embedded time stamp flag.
Definition: dca_core.h:112
DCADSPData::fix
struct DCADSPData::@66::@68 fix
DCACoreDecoder::sync_ssf
int sync_ssf
Audio sync word insertion flag.
Definition: dca_core.h:116
DCA_LFE_FLAG_128
@ DCA_LFE_FLAG_128
Definition: dca_core.h:80
AVTXContext
Definition: tx_priv.h:235
synth_filter.h
ff_dca_core_filter_frame
int ff_dca_core_filter_frame(DCACoreDecoder *s, AVFrame *frame)
Definition: dca_core.c:2343
DCA_SPEAKER_MASK_Rs
@ DCA_SPEAKER_MASK_Rs
Definition: dca.h:95
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
dcadct.h
DCACoreDecoder::output_size
unsigned int output_size
Definition: dca_core.h:200
DCACoreDecoder::audio_mode
int audio_mode
Audio channel arrangement.
Definition: dca_core.h:108
DCACoreDecoder::dcadct
DCADCTContext dcadct
Definition: dca_core.h:192
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
DCACoreDecoder::output_history_lfe_fixed
int32_t output_history_lfe_fixed
LFE PCM history for X96 filter.
Definition: dca_core.h:203
DCACoreDecoder::joint_intensity_index
int8_t joint_intensity_index[DCA_CHANNELS]
Joint intensity coding index.
Definition: dca_core.h:131
DCA_AMODE_STEREO
@ DCA_AMODE_STEREO
Definition: dca_core.h:60
data
const char data[16]
Definition: mxf.c:148
AVFixedDSPContext
Definition: fixed_dsp.h:56
DCA_AMODE_STEREO_SUMDIFF
@ DCA_AMODE_STEREO_SUMDIFF
Definition: dca_core.h:61
DCADSPData::offset
int offset
Definition: dca_core.h:96
DCACoreDecoder::dcadsp
DCADSPContext * dcadsp
Definition: dca_core.h:191
DCACoreDecoder::x96_rev_no
int x96_rev_no
X96 revision number.
Definition: dca_core.h:171
DCACoreDecoder::x96_subband_size
unsigned int x96_subband_size
Definition: dca_core.h:180
DCACoreDecoder::nsubframes
int nsubframes
Number of subframes.
Definition: dca_core.h:126
DCACoreAudioMode
DCACoreAudioMode
Definition: dca_core.h:57
DCAExssAsset
Definition: dca_exss.h:29
DCACoreDecoder::x96_pos
int x96_pos
Bit position of X96 frame in core substream.
Definition: dca_core.h:177
DCA_CORE_CHANNELS_MAX
#define DCA_CORE_CHANNELS_MAX
Definition: dca_core.h:48
DCACoreDecoder::subband_size
unsigned int subband_size
Definition: dca_core.h:184
DCACoreDecoder::scale_factor_sel
int8_t scale_factor_sel[DCA_CHANNELS]
Scale factor code book.
Definition: dca_core.h:133
SynthFilterContext
Definition: synth_filter.h:27
DCACoreDecoder::nchannels
int nchannels
Number of primary audio channels (incl. extension channels)
Definition: dca_core.h:127
DCACoreDecoder::sumdiff_surround
int sumdiff_surround
Surround sum/difference flag.
Definition: dca_core.h:123
GetBitContext
Definition: get_bits.h:108
DCA_EXT_AUDIO_XXCH
@ DCA_EXT_AUDIO_XXCH
Definition: dca_core.h:75
DCACoreDecoder::prediction_vq_index
int16_t prediction_vq_index[DCA_CHANNELS][DCA_SUBBANDS_X96]
Prediction coefficients VQ address.
Definition: dca_core.h:141
clip23
static int32_t clip23(int32_t a)
Definition: dcamath.h:54
DCACoreDecoder::x96_crc_present
int x96_crc_present
CRC presence flag for X96 channel set header.
Definition: dca_core.h:172
DCACoreDecoder
Definition: dca_core.h:99
DCACoreDecoder::sample_rate
int sample_rate
Core audio sampling frequency.
Definition: dca_core.h:109
av_cold
#define av_cold
Definition: attributes.h:90
DCA_AMODE_STEREO_TOTAL
@ DCA_AMODE_STEREO_TOTAL
Definition: dca_core.h:62
DCACoreDecoder::fixed_dsp
AVFixedDSPContext * fixed_dsp
Definition: dca_core.h:197
DCACoreDecoder::output_rate
int output_rate
Output sample rate (1x or 2x header rate)
Definition: dca_core.h:210
av_tx_fn
void(* av_tx_fn)(AVTXContext *s, void *out, void *in, ptrdiff_t stride)
Function pointer to a function to perform the transform.
Definition: tx.h:151
DCADSPData::flt
struct DCADSPData::@66::@67 flt
DCACoreDecoder::xxch_core_mask
int xxch_core_mask
Core loudspeaker activity mask.
Definition: dca_core.h:162
DCA_SPEAKER_Rss
@ DCA_SPEAKER_Rss
Definition: dca.h:80
DCACoreDecoder::ch_remap
int ch_remap[DCA_SPEAKER_COUNT]
Channel to speaker map.
Definition: dca_core.h:206
s
#define s(width, name)
Definition: cbs_vp9.c:198
ff_dca_core_init
av_cold int ff_dca_core_init(DCACoreDecoder *s)
Definition: dca_core.c:2410
DCADSPData
Definition: dca_core.h:85
DCACoreDecoder::ext_audio_type
int ext_audio_type
Extension audio descriptor flag.
Definition: dca_core.h:114
DCADCTContext
Definition: dcadct.h:27
DCA_AMODE_MONO_DUAL
@ DCA_AMODE_MONO_DUAL
Definition: dca_core.h:59
DCA_SPEAKER_Ls
@ DCA_SPEAKER_Ls
Definition: dca.h:78
DCACoreDecoder::subband_samples
int32_t * subband_samples[DCA_CHANNELS][DCA_SUBBANDS]
Subband samples.
Definition: dca_core.h:186
DCACoreDecoder::crc_present
int crc_present
CRC present flag.
Definition: dca_core.h:105
DCACoreDecoder::sumdiff_front
int sumdiff_front
Front sum/difference flag.
Definition: dca_core.h:122
get_bits.h
DCA_AMODE_MONO
@ DCA_AMODE_MONO
Definition: dca_core.h:58
fixed_dsp.h
dca_exss.h
DCACoreDecoder::x96_rand
int x96_rand
Random seed for generating samples for unallocated X96 subbands.
Definition: dca_core.h:176
DCACoreDecoder::float_dsp
AVFloatDSPContext * float_dsp
Definition: dca_core.h:196
frame
static AVFrame * frame
Definition: demux_decode.c:54
DCACoreDecoder::filter_perfect
int filter_perfect
Multirate interpolator switch.
Definition: dca_core.h:119
DCACoreDecoder::output_samples
int32_t * output_samples[DCA_SPEAKER_COUNT]
PCM output for fixed point mode.
Definition: dca_core.h:202
DCACoreDecoder::subband_buffer
int32_t * subband_buffer
Subband sample buffer base.
Definition: dca_core.h:185
DCA_SPEAKER_Rs
@ DCA_SPEAKER_Rs
Definition: dca.h:79
DCACoreDecoder::output_buffer
void * output_buffer
PCM output buffer base.
Definition: dca_core.h:201
DCACoreDecoder::nsubsubframes
int8_t nsubsubframes[DCA_SUBFRAMES]
Subsubframe count for each subframe.
Definition: dca_core.h:139
DCACoreDecoder::bit_allocation_sel
int8_t bit_allocation_sel[DCA_CHANNELS]
Bit allocation quantizer select.
Definition: dca_core.h:134
DCACoreDecoder::ext_audio_present
int ext_audio_present
Extended coding flag.
Definition: dca_core.h:115
DCACoreDecoder::scale_factor_adj
int32_t scale_factor_adj[DCA_CHANNELS][DCA_CODE_BOOKS]
Scale factor adjustment.
Definition: dca_core.h:136
DCACoreDecoder::quant_index_sel
int8_t quant_index_sel[DCA_CHANNELS][DCA_CODE_BOOKS]
Quantization index codebook select.
Definition: dca_core.h:135
DCACoreDecoder::imdct
AVTXContext * imdct[2]
Definition: dca_core.h:193
ff_dca_core_flush
av_cold void ff_dca_core_flush(DCACoreDecoder *s)
Definition: dca_core.c:2397
DCA_DMIX_CHANNELS_MAX
#define DCA_DMIX_CHANNELS_MAX
Definition: dca_core.h:49
DCACoreDecoder::source_pcm_res
int source_pcm_res
Source PCM resolution.
Definition: dca_core.h:120
DCACoreDecoder::prediction_mode
int8_t prediction_mode[DCA_CHANNELS][DCA_SUBBANDS_X96]
Prediction mode.
Definition: dca_core.h:140
DCA_CHANNELS
#define DCA_CHANNELS
Definition: dca_core.h:39
DCADSPContext
Definition: dcadsp.h:30
float_dsp.h
dcahuff.h
DCACoreDecoder::es_format
int es_format
Extended surround (ES) mastering flag.
Definition: dca_core.h:121
scale
static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition: vvc_intra.c:290
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem_internal.h:87
shift
static int shift(int a, int b)
Definition: bonk.c:262
DCACoreExtAudioType
DCACoreExtAudioType
Definition: dca_core.h:72
ff_dca_core_close
av_cold void ff_dca_core_close(DCACoreDecoder *s)
Definition: dca_core.c:2436
DCACoreDecoder::prim_dmix_type
int prim_dmix_type
Auxiliary primary channel downmix type.
Definition: dca_core.h:150
size
int size
Definition: twinvq_data.h:10344
DCACoreDecoder::request_mask
int request_mask
Requested channel layout (for stereo downmix)
Definition: dca_core.h:207
DCA_CODE_BOOKS
#define DCA_CODE_BOOKS
Definition: dcahuff.h:32
DCACoreDecoder::ch_mask
int ch_mask
Speaker layout mask (incl. LFE and extension channels)
Definition: dca_core.h:128
DCA_SUBBANDS_X96
#define DCA_SUBBANDS_X96
Definition: dca_core.h:41
DCA_AMODE_3F2R
@ DCA_AMODE_3F2R
Definition: dca_core.h:67
DCACoreDecoder::bit_allocation
int8_t bit_allocation[DCA_CHANNELS][DCA_SUBBANDS_X96]
Bit allocation index.
Definition: dca_core.h:142
AVFloatDSPContext
Definition: float_dsp.h:24
ff_dca_core_filter_fixed
int ff_dca_core_filter_fixed(DCACoreDecoder *s, int x96_synth)
Definition: dca_core.c:1956
DCACoreDecoder::xxch_spkr_mask
int xxch_spkr_mask
Loudspeaker layout mask.
Definition: dca_core.h:163
DCACoreDecoder::transition_mode
int8_t transition_mode[DCA_SUBFRAMES][DCA_CHANNELS][DCA_SUBBANDS]
Transition mode.
Definition: dca_core.h:143
DCA_AMODE_2F2R
@ DCA_AMODE_2F2R
Definition: dca_core.h:66
DCA_AMODE_3F
@ DCA_AMODE_3F
Definition: dca_core.h:63
DCA_LFE_FLAG_64
@ DCA_LFE_FLAG_64
Definition: dca_core.h:81
DCACoreDecoder::avctx
AVCodecContext * avctx
Definition: dca_core.h:100
DCACoreDecoder::xxch_crc_present
int xxch_crc_present
CRC presence flag for XXCH channel set header.
Definition: dca_core.h:160
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
dcadsp.h
DCACoreDecoder::ext_audio_mask
int ext_audio_mask
Bit mask of fully decoded core extensions.
Definition: dca_core.h:154
DCACoreDecoder::frame_size
int frame_size
Primary frame byte size.
Definition: dca_core.h:107
DCACoreDecoder::bit_rate
int bit_rate
Transmission bit rate.
Definition: dca_core.h:110
DCACoreDecoder::predictor_history
int predictor_history
Predictor history flag switch.
Definition: dca_core.h:118
DCACoreDecoder::imdct_fn
av_tx_fn imdct_fn[2]
Definition: dca_core.h:194
DCACoreDecoder::dcadsp_data
DCADSPData dcadsp_data[DCA_CHANNELS]
FIR history buffers.
Definition: dca_core.h:190
DCACoreDecoder::output_history_lfe_float
float output_history_lfe_float
LFE PCM history for X96 filter.
Definition: dca_core.h:204
DCACoreDecoder::xxch_pos
int xxch_pos
Bit position of XXCH frame in core substream.
Definition: dca_core.h:168
ff_dca_core_parse
int ff_dca_core_parse(DCACoreDecoder *s, const uint8_t *data, int size)
Definition: dca_core.c:1795
DCACoreDecoder::lfe_samples
int32_t * lfe_samples
Decimated LFE samples.
Definition: dca_core.h:187
DCADSPData::hist2
float hist2[64]
Definition: dca_core.h:89
DCA_AMODE_2F1R
@ DCA_AMODE_2F1R
Definition: dca_core.h:64
len
int len
Definition: vorbis_enc_data.h:426
norm__
static int32_t norm__(int64_t a, int bits)
Definition: dcamath.h:27
DCA_EXT_AUDIO_XCH
@ DCA_EXT_AUDIO_XCH
Definition: dca_core.h:73
avcodec.h
DCACoreDecoder::prim_dmix_embedded
int prim_dmix_embedded
Auxiliary dynamic downmix flag.
Definition: dca_core.h:149
ff_dca_core_map_spkr
static int ff_dca_core_map_spkr(DCACoreDecoder *core, int spkr)
Definition: dca_core.h:215
DCA_SUBBANDS
#define DCA_SUBBANDS
Definition: dca_core.h:40
DCACoreDecoder::x96_nchannels
int x96_nchannels
Number of primary channels in X96 extension.
Definition: dca_core.h:173
DCA_AMODE_3F1R
@ DCA_AMODE_3F1R
Definition: dca_core.h:65
DCACoreDecoder::prim_dmix_coeff
int prim_dmix_coeff[DCA_DMIX_CHANNELS_MAX *DCA_CORE_CHANNELS_MAX]
Dynamic downmix code coefficients.
Definition: dca_core.h:151
DCACoreDecoder::x96_subband_start
int x96_subband_start
First encoded subband in X96 extension.
Definition: dca_core.h:175
DCACoreDecoder::x96_subband_buffer
int32_t * x96_subband_buffer
X96 subband sample buffer base.
Definition: dca_core.h:181
DCACoreDecoder::gb
GetBitContext gb
Definition: dca_core.h:101
U
#define U(x)
Definition: vpx_arith.h:37
DCA_AMODE_COUNT
@ DCA_AMODE_COUNT
Definition: dca_core.h:69
DCACoreDecoder::xxch_dmix_scale_inv
int xxch_dmix_scale_inv
Downmix scale factor.
Definition: dca_core.h:165
ff_dca_core_dequantize
static void ff_dca_core_dequantize(int32_t *output, const int32_t *input, int32_t step_size, int32_t scale, int residual, int len)
Definition: dca_core.h:226
DCACoreDecoder::xch_pos
int xch_pos
Bit position of XCH frame in core substream.
Definition: dca_core.h:157
AVCodecContext
main external API structure.
Definition: avcodec.h:445
DCADSPData::hist1
float hist1[1024]
Definition: dca_core.h:88
ff_dca_core_parse_exss
int ff_dca_core_parse_exss(DCACoreDecoder *s, const uint8_t *data, DCAExssAsset *asset)
Definition: dca_core.c:1828
DCACoreDecoder::nsubbands
int8_t nsubbands[DCA_CHANNELS]
Subband activity count.
Definition: dca_core.h:129
DCACoreDecoder::xxch_dmix_embedded
int xxch_dmix_embedded
Downmix already performed by encoder.
Definition: dca_core.h:164
DCACoreDecoder::x96_high_res
int x96_high_res
X96 high resolution flag.
Definition: dca_core.h:174
DCACoreDecoder::xxch_mask_nbits
int xxch_mask_nbits
Number of bits for loudspeaker mask.
Definition: dca_core.h:161
DCACoreDecoder::transition_mode_sel
int8_t transition_mode_sel[DCA_CHANNELS]
Transient mode code book.
Definition: dca_core.h:132
DCA_XXCH_CHANNELS_MAX
#define DCA_XXCH_CHANNELS_MAX
Definition: dca_core.h:50
DCACoreDecoder::xxch_dmix_coeff
int xxch_dmix_coeff[DCA_XXCH_CHANNELS_MAX *DCA_CORE_CHANNELS_MAX]
Downmix coefficients.
Definition: dca_core.h:167
DCA_SUBFRAMES
#define DCA_SUBFRAMES
Definition: dca_core.h:42
DCA_SPEAKER_MASK_Ls
@ DCA_SPEAKER_MASK_Ls
Definition: dca.h:94
DCACoreDecoder::xxch_dmix_mask
int xxch_dmix_mask[DCA_XXCH_CHANNELS_MAX]
Downmix channel mapping mask.
Definition: dca_core.h:166
DCACoreDecoder::x96_subband_samples
int32_t * x96_subband_samples[DCA_CHANNELS][DCA_SUBBANDS_X96]
X96 subband samples.
Definition: dca_core.h:182
DCACoreDecoder::scale_factors
int32_t scale_factors[DCA_CHANNELS][DCA_SUBBANDS][2]
Scale factors (2x for transients and X96)
Definition: dca_core.h:144
DCACoreDecoder::synth
SynthFilterContext synth
Definition: dca_core.h:195
DCACoreDecoder::subband_vq_start
int8_t subband_vq_start[DCA_CHANNELS]
High frequency VQ start subband.
Definition: dca_core.h:130
int32_t
int32_t
Definition: audioconvert.c:56
DCA_SPEAKER_COUNT
@ DCA_SPEAKER_COUNT
Definition: dca.h:87
DCACoreDecoder::drc_present
int drc_present
Embedded dynamic range flag.
Definition: dca_core.h:111
DCADSPData::u
union DCADSPData::@66 u
DCACoreDecoder::npcmblocks
int npcmblocks
Number of PCM sample blocks.
Definition: dca_core.h:106
DCACoreDecoder::aux_present
int aux_present
Auxiliary data flag.
Definition: dca_core.h:113
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
DCACoreLFEFlag
DCACoreLFEFlag
Definition: dca_core.h:78
tx.h