FFmpeg
ac3enc.h
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1 /*
2  * AC-3 encoder & E-AC-3 encoder common header
3  * Copyright (c) 2000 Fabrice Bellard
4  * Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * AC-3 encoder & E-AC-3 encoder common header
26  */
27 
28 #ifndef AVCODEC_AC3ENC_H
29 #define AVCODEC_AC3ENC_H
30 
31 #include <stdint.h>
32 
33 #include "libavutil/opt.h"
34 #include "libavutil/tx.h"
35 
36 #include "ac3.h"
37 #include "ac3defs.h"
38 #include "ac3dsp.h"
39 #include "avcodec.h"
40 #include "codec_internal.h"
41 #include "mathops.h"
42 #include "me_cmp.h"
43 #include "put_bits.h"
44 #include "audiodsp.h"
45 
46 #ifndef AC3ENC_FLOAT
47 #define AC3ENC_FLOAT 0
48 #endif
49 
50 #if AC3ENC_FLOAT
51 #include "libavutil/float_dsp.h"
52 #define AC3_NAME(x) ff_ac3_float_ ## x
53 #define MAC_COEF(d,a,b) ((d)+=(a)*(b))
54 #define COEF_MIN (-16777215.0/16777216.0)
55 #define COEF_MAX ( 16777215.0/16777216.0)
56 #define NEW_CPL_COORD_THRESHOLD 0.03
57 typedef float SampleType;
58 typedef float CoefType;
59 typedef float CoefSumType;
60 #else
61 #include "libavutil/fixed_dsp.h"
62 #define AC3_NAME(x) ff_ac3_fixed_ ## x
63 #define MAC_COEF(d,a,b) MAC64(d,a,b)
64 #define COEF_MIN -16777215
65 #define COEF_MAX 16777215
66 #define NEW_CPL_COORD_THRESHOLD 503317
68 typedef int32_t CoefType;
69 typedef int64_t CoefSumType;
70 #endif
71 
72 /* common option values */
73 #define AC3ENC_OPT_NONE -1
74 #define AC3ENC_OPT_AUTO -1
75 #define AC3ENC_OPT_OFF 0
76 #define AC3ENC_OPT_ON 1
77 #define AC3ENC_OPT_NOT_INDICATED 0
78 #define AC3ENC_OPT_MODE_ON 2
79 #define AC3ENC_OPT_MODE_OFF 1
80 #define AC3ENC_OPT_DSUREX_DPLIIZ 3
81 
82 /* specific option values */
83 #define AC3ENC_OPT_LARGE_ROOM 1
84 #define AC3ENC_OPT_SMALL_ROOM 2
85 #define AC3ENC_OPT_DOWNMIX_LTRT 1
86 #define AC3ENC_OPT_DOWNMIX_LORO 2
87 #define AC3ENC_OPT_DOWNMIX_DPLII 3 // reserved value in A/52, but used by encoders to indicate DPL2
88 #define AC3ENC_OPT_ADCONV_STANDARD 0
89 #define AC3ENC_OPT_ADCONV_HDCD 1
90 
91 
92 /**
93  * Encoding Options used by AVOption.
94  */
95 typedef struct AC3EncOptions {
96  /* AC-3 metadata options*/
106  int original;
119 
120  /* other encoding options */
125 } AC3EncOptions;
126 
127 /**
128  * Data for a single audio block.
129  */
130 typedef struct AC3Block {
131  CoefType **mdct_coef; ///< MDCT coefficients
132  int32_t **fixed_coef; ///< fixed-point MDCT coefficients
133  uint8_t **exp; ///< original exponents
134  uint8_t **grouped_exp; ///< grouped exponents
135  int16_t **psd; ///< psd per frequency bin
136  int16_t **band_psd; ///< psd per critical band
137  int16_t **mask; ///< masking curve
138  uint16_t **qmant; ///< quantized mantissas
139  uint8_t **cpl_coord_exp; ///< coupling coord exponents (cplcoexp)
140  uint8_t **cpl_coord_mant; ///< coupling coord mantissas (cplcomant)
141  uint8_t new_rematrixing_strategy; ///< send new rematrixing flags in this block
142  int num_rematrixing_bands; ///< number of rematrixing bands
143  uint8_t rematrixing_flags[4]; ///< rematrixing flags
144  int new_cpl_strategy; ///< send new coupling strategy
145  int cpl_in_use; ///< coupling in use for this block (cplinu)
146  uint8_t channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl)
147  int num_cpl_channels; ///< number of channels in coupling
148  uint8_t new_cpl_coords[AC3_MAX_CHANNELS]; ///< send new coupling coordinates (cplcoe)
149  uint8_t cpl_master_exp[AC3_MAX_CHANNELS]; ///< coupling coord master exponents (mstrcplco)
150  int new_snr_offsets; ///< send new SNR offsets
151  int new_cpl_leak; ///< send new coupling leak info
152  int end_freq[AC3_MAX_CHANNELS]; ///< end frequency bin (endmant)
153 } AC3Block;
154 
155 /**
156  * AC-3 encoder private context.
157  */
158 typedef struct AC3EncodeContext {
159  AVClass *av_class; ///< AVClass used for AVOption
160  AC3EncOptions options; ///< encoding options
161  AVCodecContext *avctx; ///< parent AVCodecContext
162  PutBitContext pb; ///< bitstream writer context
164 #if AC3ENC_FLOAT
166 #else
168 #endif
170  AC3DSPContext ac3dsp; ///< AC-3 optimized functions
171  AVTXContext *tx; ///< FFT context for MDCT calculation
173  const SampleType *mdct_window; ///< MDCT window function array
174 
175  AC3Block blocks[AC3_MAX_BLOCKS]; ///< per-block info
176 
177  int fixed_point; ///< indicates if fixed-point encoder is being used
178  int eac3; ///< indicates if this is E-AC-3 vs. AC-3
179  int bitstream_id; ///< bitstream id (bsid)
180  int bitstream_mode; ///< bitstream mode (bsmod)
181 
182  int bit_rate; ///< target bit rate, in bits-per-second
183  int sample_rate; ///< sampling frequency, in Hz
184 
185  int num_blks_code; ///< number of blocks code (numblkscod)
186  int num_blocks; ///< number of blocks per frame
187  int frame_size_min; ///< minimum frame size in case rounding is necessary
188  int frame_size; ///< current frame size in bytes
189  int frame_size_code; ///< frame size code (frmsizecod)
190  uint16_t crc_inv[2];
191  int64_t bits_written; ///< bit count (used to avg. bitrate)
192  int64_t samples_written; ///< sample count (used to avg. bitrate)
193 
194  int fbw_channels; ///< number of full-bandwidth channels (nfchans)
195  int channels; ///< total number of channels (nchans)
196  int lfe_on; ///< indicates if there is an LFE channel (lfeon)
197  int lfe_channel; ///< channel index of the LFE channel
198  int has_center; ///< indicates if there is a center channel
199  int has_surround; ///< indicates if there are one or more surround channels
200  int channel_mode; ///< channel mode (acmod)
201  const uint8_t *channel_map; ///< channel map used to reorder channels
202 
203  int center_mix_level; ///< center mix level code
204  int surround_mix_level; ///< surround mix level code
205  int ltrt_center_mix_level; ///< Lt/Rt center mix level code
206  int ltrt_surround_mix_level; ///< Lt/Rt surround mix level code
207  int loro_center_mix_level; ///< Lo/Ro center mix level code
208  int loro_surround_mix_level; ///< Lo/Ro surround mix level code
209 
210  int cutoff; ///< user-specified cutoff frequency, in Hz
211  int bandwidth_code; ///< bandwidth code (0 to 60) (chbwcod)
212  int start_freq[AC3_MAX_CHANNELS]; ///< start frequency bin (strtmant)
213  int cpl_end_freq; ///< coupling channel end frequency bin
214 
215  int cpl_on; ///< coupling turned on for this frame
216  int cpl_enabled; ///< coupling enabled for all frames
217  int num_cpl_subbands; ///< number of coupling subbands (ncplsubnd)
218  int num_cpl_bands; ///< number of coupling bands (ncplbnd)
219  uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]; ///< number of coeffs in each coupling band
220 
221  int rematrixing_enabled; ///< stereo rematrixing enabled
222 
223  /* bitrate allocation control */
224  int slow_gain_code; ///< slow gain code (sgaincod)
225  int slow_decay_code; ///< slow decay code (sdcycod)
226  int fast_decay_code; ///< fast decay code (fdcycod)
227  int db_per_bit_code; ///< dB/bit code (dbpbcod)
228  int floor_code; ///< floor code (floorcod)
229  AC3BitAllocParameters bit_alloc; ///< bit allocation parameters
230  int coarse_snr_offset; ///< coarse SNR offsets (csnroffst)
231  int fast_gain_code[AC3_MAX_CHANNELS]; ///< fast gain codes (signal-to-mask ratio) (fgaincod)
232  int fine_snr_offset[AC3_MAX_CHANNELS]; ///< fine SNR offsets (fsnroffst)
233  int frame_bits_fixed; ///< number of non-coefficient bits for fixed parameters
234  int frame_bits; ///< all frame bits except exponents and mantissas
235  int exponent_bits; ///< number of bits used for exponents
236 
239  uint8_t *bap_buffer;
240  uint8_t *bap1_buffer;
243  uint8_t *exp_buffer;
245  int16_t *psd_buffer;
246  int16_t *band_psd_buffer;
247  int16_t *mask_buffer;
248  int16_t *qmant_buffer;
251 
252  uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< exponent strategies
253  uint8_t frame_exp_strategy[AC3_MAX_CHANNELS]; ///< frame exp strategy index
254  int use_frame_exp_strategy; ///< indicates use of frame exp strategy
255  uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< reference blocks for EXP_REUSE
256  uint8_t *ref_bap [AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< bit allocation pointers (bap)
257  int ref_bap_set; ///< indicates if ref_bap pointers have been set
258 
260 
261  /* fixed vs. float function pointers */
263 
264  /* fixed vs. float templated function pointers */
266 
267  /* AC-3 vs. E-AC-3 function pointers */
270 
271 #if FF_API_OLD_CHANNEL_LAYOUT
272 extern const uint64_t ff_ac3_channel_layouts[19];
273 #endif
274 extern const AVChannelLayout ff_ac3_ch_layouts[19];
275 extern const AVOption ff_ac3_enc_options[];
276 extern const AVClass ff_ac3enc_class;
277 extern const FFCodecDefault ff_ac3_enc_defaults[];
278 
281 
283 
285 
287 
289 
291  const AVFrame *frame, int *got_packet_ptr);
292 
293 /* prototypes for functions in ac3enc_template.c */
294 
296  const AVFrame *frame, int *got_packet_ptr);
298  const AVFrame *frame, int *got_packet_ptr);
299 
300 #endif /* AVCODEC_AC3ENC_H */
AC3EncodeContext::samples_written
int64_t samples_written
sample count (used to avg. bitrate)
Definition: ac3enc.h:192
AC3Block::fixed_coef
int32_t ** fixed_coef
fixed-point MDCT coefficients
Definition: ac3enc.h:132
AC3EncodeContext::db_per_bit_code
int db_per_bit_code
dB/bit code (dbpbcod)
Definition: ac3enc.h:227
AC3EncOptions::mixing_level
int mixing_level
Definition: ac3enc.h:103
AC3EncodeContext::lfe_on
int lfe_on
indicates if there is an LFE channel (lfeon)
Definition: ac3enc.h:196
opt.h
ff_ac3_encode_close
int ff_ac3_encode_close(AVCodecContext *avctx)
Finalize encoding and free any memory allocated by the encoder.
Definition: ac3enc.c:2168
AC3EncodeContext::frame_bits
int frame_bits
all frame bits except exponents and mantissas
Definition: ac3enc.h:234
AC3EncOptions::dolby_headphone_mode
int dolby_headphone_mode
Definition: ac3enc.h:115
AC3Block::exp
uint8_t ** exp
original exponents
Definition: ac3enc.h:133
AC3EncodeContext::frame_size_code
int frame_size_code
frame size code (frmsizecod)
Definition: ac3enc.h:189
AC3EncodeContext::exp_strategy
uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]
exponent strategies
Definition: ac3enc.h:252
AVTXContext
Definition: tx_priv.h:235
AC3EncodeContext::slow_decay_code
int slow_decay_code
slow decay code (sdcycod)
Definition: ac3enc.h:225
AC3EncodeContext::pb
PutBitContext pb
bitstream writer context
Definition: ac3enc.h:162
AC3Block::grouped_exp
uint8_t ** grouped_exp
grouped exponents
Definition: ac3enc.h:134
AC3EncOptions::cpl_start
int cpl_start
Definition: ac3enc.h:124
AC3Block::channel_in_cpl
uint8_t channel_in_cpl[AC3_MAX_CHANNELS]
channel in coupling (chincpl)
Definition: ac3enc.h:146
AC3EncodeContext::bit_alloc
AC3BitAllocParameters bit_alloc
bit allocation parameters
Definition: ac3enc.h:229
AC3EncodeContext::mdct_init
int(* mdct_init)(struct AC3EncodeContext *s)
Definition: ac3enc.h:262
AC3EncOptions::ltrt_surround_mix_level
float ltrt_surround_mix_level
Definition: ac3enc.h:110
AC3EncOptions::dialogue_level
int dialogue_level
Definition: ac3enc.h:97
SampleType
int32_t SampleType
Definition: ac3enc.h:67
AC3DSPContext
Definition: ac3dsp.h:34
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AC3EncOptions::dolby_surround_mode
int dolby_surround_mode
Definition: ac3enc.h:101
AVOption
AVOption.
Definition: opt.h:294
ff_ac3_validate_metadata
int ff_ac3_validate_metadata(AC3EncodeContext *s)
Validate metadata options as set by AVOption system.
Definition: ac3enc.c:1985
AC3EncodeContext::channel_mode
int channel_mode
channel mode (acmod)
Definition: ac3enc.h:200
AC3EncodeContext::bandwidth_code
int bandwidth_code
bandwidth code (0 to 60) (chbwcod)
Definition: ac3enc.h:211
AC3EncOptions::center_mix_level
float center_mix_level
Definition: ac3enc.h:99
AC3Block::end_freq
int end_freq[AC3_MAX_CHANNELS]
end frequency bin (endmant)
Definition: ac3enc.h:152
AVFixedDSPContext
Definition: fixed_dsp.h:56
AC3EncodeContext::grouped_exp_buffer
uint8_t * grouped_exp_buffer
Definition: ac3enc.h:244
AC3EncodeContext::rematrixing_enabled
int rematrixing_enabled
stereo rematrixing enabled
Definition: ac3enc.h:221
AC3_MAX_CPL_BANDS
#define AC3_MAX_CPL_BANDS
Definition: ac3defs.h:35
ff_ac3_float_encode_frame
int ff_ac3_float_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
AC3EncodeContext::start_freq
int start_freq[AC3_MAX_CHANNELS]
start frequency bin (strtmant)
Definition: ac3enc.h:212
FFCodecDefault
Definition: codec_internal.h:97
AC3Block::new_snr_offsets
int new_snr_offsets
send new SNR offsets
Definition: ac3enc.h:150
ff_ac3_float_encode_init
int ff_ac3_float_encode_init(AVCodecContext *avctx)
Definition: ac3enc_float.c:103
AC3Block::num_cpl_channels
int num_cpl_channels
number of channels in coupling
Definition: ac3enc.h:147
AC3EncOptions::stereo_rematrixing
int stereo_rematrixing
Definition: ac3enc.h:122
AC3EncodeContext::num_cpl_subbands
int num_cpl_subbands
number of coupling subbands (ncplsubnd)
Definition: ac3enc.h:217
AC3EncOptions::eac3_mixing_metadata
int eac3_mixing_metadata
Definition: ac3enc.h:117
AC3EncodeContext::fbw_channels
int fbw_channels
number of full-bandwidth channels (nfchans)
Definition: ac3enc.h:194
AC3EncodeContext::num_blks_code
int num_blks_code
number of blocks code (numblkscod)
Definition: ac3enc.h:185
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
AC3EncodeContext::slow_gain_code
int slow_gain_code
slow gain code (sgaincod)
Definition: ac3enc.h:224
s
#define s(width, name)
Definition: cbs_vp9.c:198
AC3EncodeContext::bap1_buffer
uint8_t * bap1_buffer
Definition: ac3enc.h:240
AC3EncodeContext::channels
int channels
total number of channels (nchans)
Definition: ac3enc.h:195
AC3EncodeContext::options
AC3EncOptions options
encoding options
Definition: ac3enc.h:160
AC3EncodeContext::ac3dsp
AC3DSPContext ac3dsp
AC-3 optimized functions.
Definition: ac3enc.h:170
AC3EncodeContext::fdsp
AVFixedDSPContext * fdsp
Definition: ac3enc.h:167
AC3EncodeContext::cpl_on
int cpl_on
coupling turned on for this frame
Definition: ac3enc.h:215
AC3EncodeContext::ref_bap_set
int ref_bap_set
indicates if ref_bap pointers have been set
Definition: ac3enc.h:257
AC3EncodeContext::crc_inv
uint16_t crc_inv[2]
Definition: ac3enc.h:190
AC3EncodeContext::tx_fn
av_tx_fn tx_fn
Definition: ac3enc.h:172
AC3EncodeContext::loro_center_mix_level
int loro_center_mix_level
Lo/Ro center mix level code.
Definition: ac3enc.h:207
AC3EncodeContext::output_frame_header
void(* output_frame_header)(struct AC3EncodeContext *s)
Definition: ac3enc.h:268
AC3EncodeContext::lfe_channel
int lfe_channel
channel index of the LFE channel
Definition: ac3enc.h:197
AC3EncodeContext::tx
AVTXContext * tx
FFT context for MDCT calculation.
Definition: ac3enc.h:171
AC3EncodeContext::mask_buffer
int16_t * mask_buffer
Definition: ac3enc.h:247
AC3EncodeContext::psd_buffer
int16_t * psd_buffer
Definition: ac3enc.h:245
AC3EncOptions::audio_production_info
int audio_production_info
Definition: ac3enc.h:102
AC3EncodeContext::num_cpl_bands
int num_cpl_bands
number of coupling bands (ncplbnd)
Definition: ac3enc.h:218
fixed_dsp.h
AC3EncodeContext::ltrt_surround_mix_level
int ltrt_surround_mix_level
Lt/Rt surround mix level code.
Definition: ac3enc.h:206
AC3EncOptions::bitstream_mode
int bitstream_mode
Definition: ac3enc.h:98
PutBitContext
Definition: put_bits.h:50
frame
static AVFrame * frame
Definition: demux_decode.c:54
AC3EncodeContext::loro_surround_mix_level
int loro_surround_mix_level
Lo/Ro surround mix level code.
Definition: ac3enc.h:208
AC3EncodeContext::cpl_enabled
int cpl_enabled
coupling enabled for all frames
Definition: ac3enc.h:216
AC3EncodeContext::floor_code
int floor_code
floor code (floorcod)
Definition: ac3enc.h:228
ac3defs.h
MECmpContext
Definition: me_cmp.h:55
AC3Block::qmant
uint16_t ** qmant
quantized mantissas
Definition: ac3enc.h:138
AC3EncOptions::ad_converter_type
int ad_converter_type
Definition: ac3enc.h:116
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
ff_ac3_ch_layouts
const AVChannelLayout ff_ac3_ch_layouts[19]
List of supported channel layouts.
Definition: ac3enc.c:177
AC3EncodeContext::av_class
AVClass * av_class
AVClass used for AVOption.
Definition: ac3enc.h:159
AC3EncodeContext::frame_exp_strategy
uint8_t frame_exp_strategy[AC3_MAX_CHANNELS]
frame exp strategy index
Definition: ac3enc.h:253
CoefSumType
int64_t CoefSumType
Definition: ac3enc.h:69
AC3EncodeContext::eac3
int eac3
indicates if this is E-AC-3 vs. AC-3
Definition: ac3enc.h:178
mathops.h
AC3Block::band_psd
int16_t ** band_psd
psd per critical band
Definition: ac3enc.h:136
ac3dsp.h
AC3EncodeContext::fixed_point
int fixed_point
indicates if fixed-point encoder is being used
Definition: ac3enc.h:177
AC3EncodeContext::surround_mix_level
int surround_mix_level
surround mix level code
Definition: ac3enc.h:204
AC3EncodeContext
AC-3 encoder private context.
Definition: ac3enc.h:158
AC3_MAX_CHANNELS
#define AC3_MAX_CHANNELS
maximum number of channels, including coupling channel
Definition: ac3defs.h:26
AC3EncodeContext::coarse_snr_offset
int coarse_snr_offset
coarse SNR offsets (csnroffst)
Definition: ac3enc.h:230
AC3EncOptions::extended_bsi_1
int extended_bsi_1
Definition: ac3enc.h:107
AC3EncOptions::copyright
int copyright
Definition: ac3enc.h:105
AC3Block
Data for a single audio block.
Definition: ac3enc.h:130
AC3EncodeContext::has_surround
int has_surround
indicates if there are one or more surround channels
Definition: ac3enc.h:199
float_dsp.h
AC3EncodeContext::planar_samples
SampleType ** planar_samples
Definition: ac3enc.h:238
AC3Block::new_cpl_strategy
int new_cpl_strategy
send new coupling strategy
Definition: ac3enc.h:144
AC3EncodeContext::adsp
AudioDSPContext adsp
Definition: ac3enc.h:163
AC3EncodeContext::bitstream_mode
int bitstream_mode
bitstream mode (bsmod)
Definition: ac3enc.h:180
AC3Block::cpl_master_exp
uint8_t cpl_master_exp[AC3_MAX_CHANNELS]
coupling coord master exponents (mstrcplco)
Definition: ac3enc.h:149
AC3EncodeContext::ref_bap
uint8_t * ref_bap[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]
bit allocation pointers (bap)
Definition: ac3enc.h:256
AC3EncOptions::eac3_info_metadata
int eac3_info_metadata
Definition: ac3enc.h:118
AC3EncodeContext::fast_decay_code
int fast_decay_code
fast decay code (fdcycod)
Definition: ac3enc.h:226
AC3EncOptions::dolby_surround_ex_mode
int dolby_surround_ex_mode
Definition: ac3enc.h:114
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:313
codec_internal.h
AC3Block::mask
int16_t ** mask
masking curve
Definition: ac3enc.h:137
AC3Block::psd
int16_t ** psd
psd per frequency bin
Definition: ac3enc.h:135
AC3EncodeContext::fast_gain_code
int fast_gain_code[AC3_MAX_CHANNELS]
fast gain codes (signal-to-mask ratio) (fgaincod)
Definition: ac3enc.h:231
AC3EncodeContext::bit_rate
int bit_rate
target bit rate, in bits-per-second
Definition: ac3enc.h:182
AC3EncOptions::room_type
int room_type
Definition: ac3enc.h:104
AC3EncOptions
Encoding Options used by AVOption.
Definition: ac3enc.h:95
AVFloatDSPContext
Definition: float_dsp.h:24
AC3EncodeContext::mdct_coef_buffer
CoefType * mdct_coef_buffer
Definition: ac3enc.h:241
ff_ac3enc_class
const AVClass ff_ac3enc_class
Definition: ac3enc.c:131
AC3EncodeContext::channel_map
const uint8_t * channel_map
channel map used to reorder channels
Definition: ac3enc.h:201
AC3EncodeContext::sample_rate
int sample_rate
sampling frequency, in Hz
Definition: ac3enc.h:183
AC3Block::cpl_coord_exp
uint8_t ** cpl_coord_exp
coupling coord exponents (cplcoexp)
Definition: ac3enc.h:139
AC3EncodeContext::mdct_window
const SampleType * mdct_window
MDCT window function array.
Definition: ac3enc.h:173
AC3EncodeContext::warned_alternate_bitstream
int warned_alternate_bitstream
Definition: ac3enc.h:259
AC3EncodeContext::exponent_bits
int exponent_bits
number of bits used for exponents
Definition: ac3enc.h:235
AC3Block::new_cpl_leak
int new_cpl_leak
send new coupling leak info
Definition: ac3enc.h:151
AC3EncodeContext::cpl_coord_exp_buffer
uint8_t * cpl_coord_exp_buffer
Definition: ac3enc.h:249
AC3EncodeContext::center_mix_level
int center_mix_level
center mix level code
Definition: ac3enc.h:203
AC3EncodeContext::qmant_buffer
int16_t * qmant_buffer
Definition: ac3enc.h:248
ff_ac3_compute_coupling_strategy
void ff_ac3_compute_coupling_strategy(AC3EncodeContext *s)
Set the initial coupling strategy parameters prior to coupling analysis.
Definition: ac3enc.c:324
AC3Block::cpl_coord_mant
uint8_t ** cpl_coord_mant
coupling coord mantissas (cplcomant)
Definition: ac3enc.h:140
AC3EncodeContext::blocks
AC3Block blocks[AC3_MAX_BLOCKS]
per-block info
Definition: ac3enc.h:175
AC3EncodeContext::has_center
int has_center
indicates if there is a center channel
Definition: ac3enc.h:198
ff_ac3_fixed_encode_frame
int ff_ac3_fixed_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
AC3Block::rematrixing_flags
uint8_t rematrixing_flags[4]
rematrixing flags
Definition: ac3enc.h:143
AC3EncOptions::original
int original
Definition: ac3enc.h:106
AC3EncodeContext::num_blocks
int num_blocks
number of blocks per frame
Definition: ac3enc.h:186
AC3EncodeContext::windowed_samples
SampleType * windowed_samples
Definition: ac3enc.h:237
AC3EncodeContext::allocate_sample_buffers
int(* allocate_sample_buffers)(struct AC3EncodeContext *s)
Definition: ac3enc.h:265
AC3_MAX_BLOCKS
#define AC3_MAX_BLOCKS
Definition: ac3defs.h:31
AC3EncodeContext::cpl_band_sizes
uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]
number of coeffs in each coupling band
Definition: ac3enc.h:219
AC3EncodeContext::ltrt_center_mix_level
int ltrt_center_mix_level
Lt/Rt center mix level code.
Definition: ac3enc.h:205
avcodec.h
AC3EncodeContext::exp_buffer
uint8_t * exp_buffer
Definition: ac3enc.h:243
AC3EncodeContext::frame_bits_fixed
int frame_bits_fixed
number of non-coefficient bits for fixed parameters
Definition: ac3enc.h:233
AC3EncOptions::loro_surround_mix_level
float loro_surround_mix_level
Definition: ac3enc.h:112
AC3EncodeContext::bits_written
int64_t bits_written
bit count (used to avg. bitrate)
Definition: ac3enc.h:191
AC3EncodeContext::cpl_end_freq
int cpl_end_freq
coupling channel end frequency bin
Definition: ac3enc.h:213
AC3EncOptions::ltrt_center_mix_level
float ltrt_center_mix_level
Definition: ac3enc.h:109
ff_ac3_encode_init
int ff_ac3_encode_init(AVCodecContext *avctx)
Definition: ac3enc.c:2563
AC3Block::num_rematrixing_bands
int num_rematrixing_bands
number of rematrixing bands
Definition: ac3enc.h:142
me_cmp.h
AC3EncOptions::preferred_stereo_downmix
int preferred_stereo_downmix
Definition: ac3enc.h:108
ff_ac3_encode_frame_common_end
int ff_ac3_encode_frame_common_end(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: ac3enc.c:1796
AC3BitAllocParameters
Definition: ac3.h:95
AVCodecContext
main external API structure.
Definition: avcodec.h:445
AC3EncOptions::allow_per_frame_metadata
int allow_per_frame_metadata
Definition: ac3enc.h:121
AC3EncodeContext::bitstream_id
int bitstream_id
bitstream id (bsid)
Definition: ac3enc.h:179
AC3EncodeContext::frame_size
int frame_size
current frame size in bytes
Definition: ac3enc.h:188
AC3EncodeContext::band_psd_buffer
int16_t * band_psd_buffer
Definition: ac3enc.h:246
AC3EncodeContext::exp_ref_block
uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]
reference blocks for EXP_REUSE
Definition: ac3enc.h:255
CoefType
int32_t CoefType
Definition: ac3enc.h:68
AC3EncOptions::channel_coupling
int channel_coupling
Definition: ac3enc.h:123
AC3EncodeContext::mecc
MECmpContext mecc
Definition: ac3enc.h:169
audiodsp.h
AudioDSPContext
Definition: audiodsp.h:24
AVPacket
This structure stores compressed data.
Definition: packet.h:499
AC3EncodeContext::avctx
AVCodecContext * avctx
parent AVCodecContext
Definition: ac3enc.h:161
ac3.h
AC3Block::mdct_coef
CoefType ** mdct_coef
MDCT coefficients.
Definition: ac3enc.h:131
AC3EncodeContext::use_frame_exp_strategy
int use_frame_exp_strategy
indicates use of frame exp strategy
Definition: ac3enc.h:254
AC3EncodeContext::fine_snr_offset
int fine_snr_offset[AC3_MAX_CHANNELS]
fine SNR offsets (fsnroffst)
Definition: ac3enc.h:232
AC3Block::new_rematrixing_strategy
uint8_t new_rematrixing_strategy
send new rematrixing flags in this block
Definition: ac3enc.h:141
ff_ac3_enc_defaults
const FFCodecDefault ff_ac3_enc_defaults[]
Definition: ac3enc.c:138
int32_t
int32_t
Definition: audioconvert.c:56
AC3EncodeContext::frame_size_min
int frame_size_min
minimum frame size in case rounding is necessary
Definition: ac3enc.h:187
AC3EncOptions::surround_mix_level
float surround_mix_level
Definition: ac3enc.h:100
ff_ac3_adjust_frame_size
void ff_ac3_adjust_frame_size(AC3EncodeContext *s)
Adjust the frame size to make the average bit rate match the target bit rate.
Definition: ac3enc.c:306
AC3EncodeContext::fixed_coef_buffer
int32_t * fixed_coef_buffer
Definition: ac3enc.h:242
AC3EncOptions::extended_bsi_2
int extended_bsi_2
Definition: ac3enc.h:113
int
int
Definition: ffmpeg_filter.c:424
put_bits.h
AC3EncodeContext::bap_buffer
uint8_t * bap_buffer
Definition: ac3enc.h:239
AC3Block::new_cpl_coords
uint8_t new_cpl_coords[AC3_MAX_CHANNELS]
send new coupling coordinates (cplcoe)
Definition: ac3enc.h:148
AC3Block::cpl_in_use
int cpl_in_use
coupling in use for this block (cplinu)
Definition: ac3enc.h:145
ff_ac3_enc_options
const AVOption ff_ac3_enc_options[]
Definition: ac3enc.c:81
AC3EncOptions::loro_center_mix_level
float loro_center_mix_level
Definition: ac3enc.h:111
tx.h
AC3EncodeContext::cutoff
int cutoff
user-specified cutoff frequency, in Hz
Definition: ac3enc.h:210
AC3EncodeContext::cpl_coord_mant_buffer
uint8_t * cpl_coord_mant_buffer
Definition: ac3enc.h:250