mirror of https://git.ffmpeg.org/ffmpeg.git
Move E-AC-3 encoder functions to a separate eac3enc.c file.
This commit is contained in:
parent
787a13535a
commit
c8e9ea43d0
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@ -124,7 +124,8 @@ OBJS-$(CONFIG_DVVIDEO_DECODER) += dv.o dvdata.o
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OBJS-$(CONFIG_DVVIDEO_ENCODER) += dv.o dvdata.o
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OBJS-$(CONFIG_DVVIDEO_ENCODER) += dv.o dvdata.o
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OBJS-$(CONFIG_DXA_DECODER) += dxa.o
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OBJS-$(CONFIG_DXA_DECODER) += dxa.o
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OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o eac3dec_data.o
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OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o eac3dec_data.o
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OBJS-$(CONFIG_EAC3_ENCODER) += ac3enc_float.o ac3tab.o ac3.o kbdwin.o
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OBJS-$(CONFIG_EAC3_ENCODER) += eac3enc.o ac3enc_float.o ac3tab.o \
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ac3.o kbdwin.o
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OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o
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OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o
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OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o mpeg12.o \
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OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o mpeg12.o \
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mpeg12data.o mpegvideo.o \
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mpeg12data.o mpegvideo.o \
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@ -42,183 +42,8 @@
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#include "ac3.h"
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#include "ac3.h"
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#include "audioconvert.h"
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#include "audioconvert.h"
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#include "fft.h"
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#include "fft.h"
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#include "ac3enc.h"
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#include "eac3enc.h"
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#ifndef CONFIG_AC3ENC_FLOAT
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#define CONFIG_AC3ENC_FLOAT 0
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#endif
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#if CONFIG_AC3ENC_FLOAT
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#define MAC_COEF(d,a,b) ((d)+=(a)*(b))
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typedef float SampleType;
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typedef float CoefType;
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typedef float CoefSumType;
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#else
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#define MAC_COEF(d,a,b) MAC64(d,a,b)
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typedef int16_t SampleType;
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typedef int32_t CoefType;
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typedef int64_t CoefSumType;
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#endif
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typedef struct AC3MDCTContext {
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const SampleType *window; ///< MDCT window function
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FFTContext fft; ///< FFT context for MDCT calculation
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} AC3MDCTContext;
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/**
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* Encoding Options used by AVOption.
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*/
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typedef struct AC3EncOptions {
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/* AC-3 metadata options*/
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int dialogue_level;
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int bitstream_mode;
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float center_mix_level;
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float surround_mix_level;
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int dolby_surround_mode;
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int audio_production_info;
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int mixing_level;
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int room_type;
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int copyright;
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int original;
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int extended_bsi_1;
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int preferred_stereo_downmix;
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float ltrt_center_mix_level;
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float ltrt_surround_mix_level;
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float loro_center_mix_level;
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float loro_surround_mix_level;
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int extended_bsi_2;
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int dolby_surround_ex_mode;
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int dolby_headphone_mode;
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int ad_converter_type;
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/* other encoding options */
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int allow_per_frame_metadata;
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int stereo_rematrixing;
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int channel_coupling;
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int cpl_start;
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} AC3EncOptions;
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/**
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* Data for a single audio block.
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*/
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typedef struct AC3Block {
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CoefType **mdct_coef; ///< MDCT coefficients
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int32_t **fixed_coef; ///< fixed-point MDCT coefficients
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uint8_t **exp; ///< original exponents
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uint8_t **grouped_exp; ///< grouped exponents
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int16_t **psd; ///< psd per frequency bin
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int16_t **band_psd; ///< psd per critical band
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int16_t **mask; ///< masking curve
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uint16_t **qmant; ///< quantized mantissas
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uint8_t **cpl_coord_exp; ///< coupling coord exponents (cplcoexp)
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uint8_t **cpl_coord_mant; ///< coupling coord mantissas (cplcomant)
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uint8_t coeff_shift[AC3_MAX_CHANNELS]; ///< fixed-point coefficient shift values
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uint8_t new_rematrixing_strategy; ///< send new rematrixing flags in this block
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int num_rematrixing_bands; ///< number of rematrixing bands
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uint8_t rematrixing_flags[4]; ///< rematrixing flags
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int new_cpl_strategy; ///< send new coupling strategy
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int cpl_in_use; ///< coupling in use for this block (cplinu)
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uint8_t channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl)
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int num_cpl_channels; ///< number of channels in coupling
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uint8_t new_cpl_coords; ///< send new coupling coordinates (cplcoe)
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uint8_t cpl_master_exp[AC3_MAX_CHANNELS]; ///< coupling coord master exponents (mstrcplco)
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int new_snr_offsets; ///< send new SNR offsets
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int new_cpl_leak; ///< send new coupling leak info
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int end_freq[AC3_MAX_CHANNELS]; ///< end frequency bin (endmant)
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} AC3Block;
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/**
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* AC-3 encoder private context.
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*/
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typedef struct AC3EncodeContext {
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AVClass *av_class; ///< AVClass used for AVOption
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AC3EncOptions options; ///< encoding options
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PutBitContext pb; ///< bitstream writer context
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DSPContext dsp;
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AC3DSPContext ac3dsp; ///< AC-3 optimized functions
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AC3MDCTContext mdct; ///< MDCT context
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AC3Block blocks[AC3_MAX_BLOCKS]; ///< per-block info
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int eac3; ///< indicates if this is E-AC-3 vs. AC-3
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int bitstream_id; ///< bitstream id (bsid)
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int bitstream_mode; ///< bitstream mode (bsmod)
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int bit_rate; ///< target bit rate, in bits-per-second
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int sample_rate; ///< sampling frequency, in Hz
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int frame_size_min; ///< minimum frame size in case rounding is necessary
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int frame_size; ///< current frame size in bytes
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int frame_size_code; ///< frame size code (frmsizecod)
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uint16_t crc_inv[2];
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int64_t bits_written; ///< bit count (used to avg. bitrate)
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int64_t samples_written; ///< sample count (used to avg. bitrate)
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int fbw_channels; ///< number of full-bandwidth channels (nfchans)
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int channels; ///< total number of channels (nchans)
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int lfe_on; ///< indicates if there is an LFE channel (lfeon)
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int lfe_channel; ///< channel index of the LFE channel
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int has_center; ///< indicates if there is a center channel
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int has_surround; ///< indicates if there are one or more surround channels
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int channel_mode; ///< channel mode (acmod)
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const uint8_t *channel_map; ///< channel map used to reorder channels
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int center_mix_level; ///< center mix level code
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int surround_mix_level; ///< surround mix level code
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int ltrt_center_mix_level; ///< Lt/Rt center mix level code
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int ltrt_surround_mix_level; ///< Lt/Rt surround mix level code
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int loro_center_mix_level; ///< Lo/Ro center mix level code
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int loro_surround_mix_level; ///< Lo/Ro surround mix level code
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int cutoff; ///< user-specified cutoff frequency, in Hz
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int bandwidth_code; ///< bandwidth code (0 to 60) (chbwcod)
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int start_freq[AC3_MAX_CHANNELS]; ///< start frequency bin (strtmant)
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int cpl_end_freq; ///< coupling channel end frequency bin
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int cpl_on; ///< coupling turned on for this frame
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int cpl_enabled; ///< coupling enabled for all frames
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int num_cpl_subbands; ///< number of coupling subbands (ncplsubnd)
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int num_cpl_bands; ///< number of coupling bands (ncplbnd)
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uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]; ///< number of coeffs in each coupling band
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int rematrixing_enabled; ///< stereo rematrixing enabled
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/* bitrate allocation control */
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int slow_gain_code; ///< slow gain code (sgaincod)
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int slow_decay_code; ///< slow decay code (sdcycod)
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int fast_decay_code; ///< fast decay code (fdcycod)
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int db_per_bit_code; ///< dB/bit code (dbpbcod)
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int floor_code; ///< floor code (floorcod)
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AC3BitAllocParameters bit_alloc; ///< bit allocation parameters
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int coarse_snr_offset; ///< coarse SNR offsets (csnroffst)
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int fast_gain_code[AC3_MAX_CHANNELS]; ///< fast gain codes (signal-to-mask ratio) (fgaincod)
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int fine_snr_offset[AC3_MAX_CHANNELS]; ///< fine SNR offsets (fsnroffst)
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int frame_bits_fixed; ///< number of non-coefficient bits for fixed parameters
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int frame_bits; ///< all frame bits except exponents and mantissas
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int exponent_bits; ///< number of bits used for exponents
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SampleType **planar_samples;
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uint8_t *bap_buffer;
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uint8_t *bap1_buffer;
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CoefType *mdct_coef_buffer;
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int32_t *fixed_coef_buffer;
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uint8_t *exp_buffer;
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uint8_t *grouped_exp_buffer;
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int16_t *psd_buffer;
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int16_t *band_psd_buffer;
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int16_t *mask_buffer;
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uint16_t *qmant_buffer;
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uint8_t *cpl_coord_exp_buffer;
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uint8_t *cpl_coord_mant_buffer;
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uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< exponent strategies
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uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< reference blocks for EXP_REUSE
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uint8_t *ref_bap [AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< bit allocation pointers (bap)
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int ref_bap_set; ///< indicates if ref_bap pointers have been set
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DECLARE_ALIGNED(32, SampleType, windowed_samples)[AC3_WINDOW_SIZE];
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} AC3EncodeContext;
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typedef struct AC3Mant {
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typedef struct AC3Mant {
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uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
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uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
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@ -741,34 +566,8 @@ static void apply_channel_coupling(AC3EncodeContext *s)
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}
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}
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}
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}
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if (s->eac3) {
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if (s->eac3)
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/* set first cpl coords */
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ff_eac3_set_cpl_states(s);
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int first_cpl_coords[AC3_MAX_CHANNELS];
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for (ch = 1; ch <= s->fbw_channels; ch++)
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first_cpl_coords[ch] = 1;
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for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
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AC3Block *block = &s->blocks[blk];
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for (ch = 1; ch <= s->fbw_channels; ch++) {
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if (block->channel_in_cpl[ch]) {
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if (first_cpl_coords[ch]) {
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block->new_cpl_coords = 2;
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first_cpl_coords[ch] = 0;
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}
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} else {
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first_cpl_coords[ch] = 1;
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}
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}
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}
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/* set first cpl leak */
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for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
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AC3Block *block = &s->blocks[blk];
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if (block->cpl_in_use) {
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block->new_cpl_leak = 2;
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break;
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}
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}
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}
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#endif /* CONFIG_AC3ENC_FLOAT */
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#endif /* CONFIG_AC3ENC_FLOAT */
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}
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}
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@ -1905,79 +1704,6 @@ static void ac3_output_frame_header(AC3EncodeContext *s)
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}
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}
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/**
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* Write the E-AC-3 frame header to the output bitstream.
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*/
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static void eac3_output_frame_header(AC3EncodeContext *s)
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{
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int blk, ch;
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AC3EncOptions *opt = &s->options;
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put_bits(&s->pb, 16, 0x0b77); /* sync word */
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/* BSI header */
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put_bits(&s->pb, 2, 0); /* stream type = independent */
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put_bits(&s->pb, 3, 0); /* substream id = 0 */
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put_bits(&s->pb, 11, (s->frame_size / 2) - 1); /* frame size */
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if (s->bit_alloc.sr_shift) {
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put_bits(&s->pb, 2, 0x3); /* fscod2 */
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put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
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} else {
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put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
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put_bits(&s->pb, 2, 0x3); /* number of blocks = 6 */
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}
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put_bits(&s->pb, 3, s->channel_mode); /* audio coding mode */
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put_bits(&s->pb, 1, s->lfe_on); /* LFE channel indicator */
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put_bits(&s->pb, 5, s->bitstream_id); /* bitstream id (EAC3=16) */
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put_bits(&s->pb, 5, -opt->dialogue_level); /* dialogue normalization level */
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put_bits(&s->pb, 1, 0); /* no compression gain */
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put_bits(&s->pb, 1, 0); /* no mixing metadata */
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/* TODO: mixing metadata */
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put_bits(&s->pb, 1, 0); /* no info metadata */
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/* TODO: info metadata */
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put_bits(&s->pb, 1, 0); /* no additional bit stream info */
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/* frame header */
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put_bits(&s->pb, 1, 1); /* exponent strategy syntax = each block */
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put_bits(&s->pb, 1, 0); /* aht enabled = no */
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put_bits(&s->pb, 2, 0); /* snr offset strategy = 1 */
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put_bits(&s->pb, 1, 0); /* transient pre-noise processing enabled = no */
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put_bits(&s->pb, 1, 0); /* block switch syntax enabled = no */
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put_bits(&s->pb, 1, 0); /* dither flag syntax enabled = no */
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put_bits(&s->pb, 1, 0); /* bit allocation model syntax enabled = no */
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put_bits(&s->pb, 1, 0); /* fast gain codes enabled = no */
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put_bits(&s->pb, 1, 0); /* dba syntax enabled = no */
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put_bits(&s->pb, 1, 0); /* skip field syntax enabled = no */
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put_bits(&s->pb, 1, 0); /* spx enabled = no */
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/* coupling strategy use flags */
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if (s->channel_mode > AC3_CHMODE_MONO) {
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put_bits(&s->pb, 1, s->blocks[0].cpl_in_use);
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for (blk = 1; blk < AC3_MAX_BLOCKS; blk++) {
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AC3Block *block = &s->blocks[blk];
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put_bits(&s->pb, 1, block->new_cpl_strategy);
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if (block->new_cpl_strategy)
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put_bits(&s->pb, 1, block->cpl_in_use);
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}
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}
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/* exponent strategy */
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for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
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for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++)
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put_bits(&s->pb, 2, s->exp_strategy[ch][blk]);
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if (s->lfe_on) {
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for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
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put_bits(&s->pb, 1, s->exp_strategy[s->lfe_channel][blk]);
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}
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/* E-AC-3 to AC-3 converter exponent strategy (unfortunately not optional...) */
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for (ch = 1; ch <= s->fbw_channels; ch++)
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put_bits(&s->pb, 5, 0);
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/* snr offsets */
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put_bits(&s->pb, 6, s->coarse_snr_offset);
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put_bits(&s->pb, 4, s->fine_snr_offset[1]);
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/* block start info */
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put_bits(&s->pb, 1, 0);
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}
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/**
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/**
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* Write one audio block to the output bitstream.
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* Write one audio block to the output bitstream.
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*/
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*/
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@ -2262,7 +1988,7 @@ static void output_frame(AC3EncodeContext *s, unsigned char *frame)
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init_put_bits(&s->pb, frame, AC3_MAX_CODED_FRAME_SIZE);
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init_put_bits(&s->pb, frame, AC3_MAX_CODED_FRAME_SIZE);
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if (s->eac3)
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if (s->eac3)
|
||||||
eac3_output_frame_header(s);
|
ff_eac3_output_frame_header(s);
|
||||||
else
|
else
|
||||||
ac3_output_frame_header(s);
|
ac3_output_frame_header(s);
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,214 @@
|
||||||
|
/*
|
||||||
|
* AC-3 encoder & E-AC-3 encoder common header
|
||||||
|
* Copyright (c) 2000 Fabrice Bellard
|
||||||
|
* Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
|
||||||
|
*
|
||||||
|
* 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
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file
|
||||||
|
* AC-3 encoder & E-AC-3 encoder common header
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef AVCODEC_AC3ENC_H
|
||||||
|
#define AVCODEC_AC3ENC_H
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
#include "ac3.h"
|
||||||
|
#include "ac3dsp.h"
|
||||||
|
#include "avcodec.h"
|
||||||
|
#include "dsputil.h"
|
||||||
|
#include "put_bits.h"
|
||||||
|
#include "fft.h"
|
||||||
|
|
||||||
|
#ifndef CONFIG_AC3ENC_FLOAT
|
||||||
|
#define CONFIG_AC3ENC_FLOAT 0
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if CONFIG_AC3ENC_FLOAT
|
||||||
|
#define MAC_COEF(d,a,b) ((d)+=(a)*(b))
|
||||||
|
typedef float SampleType;
|
||||||
|
typedef float CoefType;
|
||||||
|
typedef float CoefSumType;
|
||||||
|
#else
|
||||||
|
#define MAC_COEF(d,a,b) MAC64(d,a,b)
|
||||||
|
typedef int16_t SampleType;
|
||||||
|
typedef int32_t CoefType;
|
||||||
|
typedef int64_t CoefSumType;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
typedef struct AC3MDCTContext {
|
||||||
|
const SampleType *window; ///< MDCT window function
|
||||||
|
FFTContext fft; ///< FFT context for MDCT calculation
|
||||||
|
} AC3MDCTContext;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Encoding Options used by AVOption.
|
||||||
|
*/
|
||||||
|
typedef struct AC3EncOptions {
|
||||||
|
/* AC-3 metadata options*/
|
||||||
|
int dialogue_level;
|
||||||
|
int bitstream_mode;
|
||||||
|
float center_mix_level;
|
||||||
|
float surround_mix_level;
|
||||||
|
int dolby_surround_mode;
|
||||||
|
int audio_production_info;
|
||||||
|
int mixing_level;
|
||||||
|
int room_type;
|
||||||
|
int copyright;
|
||||||
|
int original;
|
||||||
|
int extended_bsi_1;
|
||||||
|
int preferred_stereo_downmix;
|
||||||
|
float ltrt_center_mix_level;
|
||||||
|
float ltrt_surround_mix_level;
|
||||||
|
float loro_center_mix_level;
|
||||||
|
float loro_surround_mix_level;
|
||||||
|
int extended_bsi_2;
|
||||||
|
int dolby_surround_ex_mode;
|
||||||
|
int dolby_headphone_mode;
|
||||||
|
int ad_converter_type;
|
||||||
|
|
||||||
|
/* other encoding options */
|
||||||
|
int allow_per_frame_metadata;
|
||||||
|
int stereo_rematrixing;
|
||||||
|
int channel_coupling;
|
||||||
|
int cpl_start;
|
||||||
|
} AC3EncOptions;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Data for a single audio block.
|
||||||
|
*/
|
||||||
|
typedef struct AC3Block {
|
||||||
|
CoefType **mdct_coef; ///< MDCT coefficients
|
||||||
|
int32_t **fixed_coef; ///< fixed-point MDCT coefficients
|
||||||
|
uint8_t **exp; ///< original exponents
|
||||||
|
uint8_t **grouped_exp; ///< grouped exponents
|
||||||
|
int16_t **psd; ///< psd per frequency bin
|
||||||
|
int16_t **band_psd; ///< psd per critical band
|
||||||
|
int16_t **mask; ///< masking curve
|
||||||
|
uint16_t **qmant; ///< quantized mantissas
|
||||||
|
uint8_t **cpl_coord_exp; ///< coupling coord exponents (cplcoexp)
|
||||||
|
uint8_t **cpl_coord_mant; ///< coupling coord mantissas (cplcomant)
|
||||||
|
uint8_t coeff_shift[AC3_MAX_CHANNELS]; ///< fixed-point coefficient shift values
|
||||||
|
uint8_t new_rematrixing_strategy; ///< send new rematrixing flags in this block
|
||||||
|
int num_rematrixing_bands; ///< number of rematrixing bands
|
||||||
|
uint8_t rematrixing_flags[4]; ///< rematrixing flags
|
||||||
|
int new_cpl_strategy; ///< send new coupling strategy
|
||||||
|
int cpl_in_use; ///< coupling in use for this block (cplinu)
|
||||||
|
uint8_t channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl)
|
||||||
|
int num_cpl_channels; ///< number of channels in coupling
|
||||||
|
uint8_t new_cpl_coords; ///< send new coupling coordinates (cplcoe)
|
||||||
|
uint8_t cpl_master_exp[AC3_MAX_CHANNELS]; ///< coupling coord master exponents (mstrcplco)
|
||||||
|
int new_snr_offsets; ///< send new SNR offsets
|
||||||
|
int new_cpl_leak; ///< send new coupling leak info
|
||||||
|
int end_freq[AC3_MAX_CHANNELS]; ///< end frequency bin (endmant)
|
||||||
|
} AC3Block;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* AC-3 encoder private context.
|
||||||
|
*/
|
||||||
|
typedef struct AC3EncodeContext {
|
||||||
|
AVClass *av_class; ///< AVClass used for AVOption
|
||||||
|
AC3EncOptions options; ///< encoding options
|
||||||
|
PutBitContext pb; ///< bitstream writer context
|
||||||
|
DSPContext dsp;
|
||||||
|
AC3DSPContext ac3dsp; ///< AC-3 optimized functions
|
||||||
|
AC3MDCTContext mdct; ///< MDCT context
|
||||||
|
|
||||||
|
AC3Block blocks[AC3_MAX_BLOCKS]; ///< per-block info
|
||||||
|
|
||||||
|
int eac3; ///< indicates if this is E-AC-3 vs. AC-3
|
||||||
|
int bitstream_id; ///< bitstream id (bsid)
|
||||||
|
int bitstream_mode; ///< bitstream mode (bsmod)
|
||||||
|
|
||||||
|
int bit_rate; ///< target bit rate, in bits-per-second
|
||||||
|
int sample_rate; ///< sampling frequency, in Hz
|
||||||
|
|
||||||
|
int frame_size_min; ///< minimum frame size in case rounding is necessary
|
||||||
|
int frame_size; ///< current frame size in bytes
|
||||||
|
int frame_size_code; ///< frame size code (frmsizecod)
|
||||||
|
uint16_t crc_inv[2];
|
||||||
|
int64_t bits_written; ///< bit count (used to avg. bitrate)
|
||||||
|
int64_t samples_written; ///< sample count (used to avg. bitrate)
|
||||||
|
|
||||||
|
int fbw_channels; ///< number of full-bandwidth channels (nfchans)
|
||||||
|
int channels; ///< total number of channels (nchans)
|
||||||
|
int lfe_on; ///< indicates if there is an LFE channel (lfeon)
|
||||||
|
int lfe_channel; ///< channel index of the LFE channel
|
||||||
|
int has_center; ///< indicates if there is a center channel
|
||||||
|
int has_surround; ///< indicates if there are one or more surround channels
|
||||||
|
int channel_mode; ///< channel mode (acmod)
|
||||||
|
const uint8_t *channel_map; ///< channel map used to reorder channels
|
||||||
|
|
||||||
|
int center_mix_level; ///< center mix level code
|
||||||
|
int surround_mix_level; ///< surround mix level code
|
||||||
|
int ltrt_center_mix_level; ///< Lt/Rt center mix level code
|
||||||
|
int ltrt_surround_mix_level; ///< Lt/Rt surround mix level code
|
||||||
|
int loro_center_mix_level; ///< Lo/Ro center mix level code
|
||||||
|
int loro_surround_mix_level; ///< Lo/Ro surround mix level code
|
||||||
|
|
||||||
|
int cutoff; ///< user-specified cutoff frequency, in Hz
|
||||||
|
int bandwidth_code; ///< bandwidth code (0 to 60) (chbwcod)
|
||||||
|
int start_freq[AC3_MAX_CHANNELS]; ///< start frequency bin (strtmant)
|
||||||
|
int cpl_end_freq; ///< coupling channel end frequency bin
|
||||||
|
|
||||||
|
int cpl_on; ///< coupling turned on for this frame
|
||||||
|
int cpl_enabled; ///< coupling enabled for all frames
|
||||||
|
int num_cpl_subbands; ///< number of coupling subbands (ncplsubnd)
|
||||||
|
int num_cpl_bands; ///< number of coupling bands (ncplbnd)
|
||||||
|
uint8_t cpl_band_sizes[AC3_MAX_CPL_BANDS]; ///< number of coeffs in each coupling band
|
||||||
|
|
||||||
|
int rematrixing_enabled; ///< stereo rematrixing enabled
|
||||||
|
|
||||||
|
/* bitrate allocation control */
|
||||||
|
int slow_gain_code; ///< slow gain code (sgaincod)
|
||||||
|
int slow_decay_code; ///< slow decay code (sdcycod)
|
||||||
|
int fast_decay_code; ///< fast decay code (fdcycod)
|
||||||
|
int db_per_bit_code; ///< dB/bit code (dbpbcod)
|
||||||
|
int floor_code; ///< floor code (floorcod)
|
||||||
|
AC3BitAllocParameters bit_alloc; ///< bit allocation parameters
|
||||||
|
int coarse_snr_offset; ///< coarse SNR offsets (csnroffst)
|
||||||
|
int fast_gain_code[AC3_MAX_CHANNELS]; ///< fast gain codes (signal-to-mask ratio) (fgaincod)
|
||||||
|
int fine_snr_offset[AC3_MAX_CHANNELS]; ///< fine SNR offsets (fsnroffst)
|
||||||
|
int frame_bits_fixed; ///< number of non-coefficient bits for fixed parameters
|
||||||
|
int frame_bits; ///< all frame bits except exponents and mantissas
|
||||||
|
int exponent_bits; ///< number of bits used for exponents
|
||||||
|
|
||||||
|
SampleType **planar_samples;
|
||||||
|
uint8_t *bap_buffer;
|
||||||
|
uint8_t *bap1_buffer;
|
||||||
|
CoefType *mdct_coef_buffer;
|
||||||
|
int32_t *fixed_coef_buffer;
|
||||||
|
uint8_t *exp_buffer;
|
||||||
|
uint8_t *grouped_exp_buffer;
|
||||||
|
int16_t *psd_buffer;
|
||||||
|
int16_t *band_psd_buffer;
|
||||||
|
int16_t *mask_buffer;
|
||||||
|
uint16_t *qmant_buffer;
|
||||||
|
uint8_t *cpl_coord_exp_buffer;
|
||||||
|
uint8_t *cpl_coord_mant_buffer;
|
||||||
|
|
||||||
|
uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< exponent strategies
|
||||||
|
uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< reference blocks for EXP_REUSE
|
||||||
|
uint8_t *ref_bap [AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< bit allocation pointers (bap)
|
||||||
|
int ref_bap_set; ///< indicates if ref_bap pointers have been set
|
||||||
|
|
||||||
|
DECLARE_ALIGNED(32, SampleType, windowed_samples)[AC3_WINDOW_SIZE];
|
||||||
|
} AC3EncodeContext;
|
||||||
|
|
||||||
|
#endif /* AVCODEC_AC3ENC_H */
|
|
@ -0,0 +1,131 @@
|
||||||
|
/*
|
||||||
|
* E-AC-3 encoder
|
||||||
|
* Copyright (c) 2011 Justin Ruggles <justin.ruggles@gmail.com>
|
||||||
|
*
|
||||||
|
* 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
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file
|
||||||
|
* E-AC-3 encoder
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define CONFIG_AC3ENC_FLOAT 1
|
||||||
|
#include "ac3enc.h"
|
||||||
|
#include "eac3enc.h"
|
||||||
|
|
||||||
|
void ff_eac3_set_cpl_states(AC3EncodeContext *s)
|
||||||
|
{
|
||||||
|
int ch, blk;
|
||||||
|
int first_cpl_coords[AC3_MAX_CHANNELS];
|
||||||
|
|
||||||
|
/* set first cpl coords */
|
||||||
|
for (ch = 1; ch <= s->fbw_channels; ch++)
|
||||||
|
first_cpl_coords[ch] = 1;
|
||||||
|
for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
|
||||||
|
AC3Block *block = &s->blocks[blk];
|
||||||
|
for (ch = 1; ch <= s->fbw_channels; ch++) {
|
||||||
|
if (block->channel_in_cpl[ch]) {
|
||||||
|
if (first_cpl_coords[ch]) {
|
||||||
|
block->new_cpl_coords = 2;
|
||||||
|
first_cpl_coords[ch] = 0;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
first_cpl_coords[ch] = 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* set first cpl leak */
|
||||||
|
for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
|
||||||
|
AC3Block *block = &s->blocks[blk];
|
||||||
|
if (block->cpl_in_use) {
|
||||||
|
block->new_cpl_leak = 2;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void ff_eac3_output_frame_header(AC3EncodeContext *s)
|
||||||
|
{
|
||||||
|
int blk, ch;
|
||||||
|
AC3EncOptions *opt = &s->options;
|
||||||
|
|
||||||
|
put_bits(&s->pb, 16, 0x0b77); /* sync word */
|
||||||
|
|
||||||
|
/* BSI header */
|
||||||
|
put_bits(&s->pb, 2, 0); /* stream type = independent */
|
||||||
|
put_bits(&s->pb, 3, 0); /* substream id = 0 */
|
||||||
|
put_bits(&s->pb, 11, (s->frame_size / 2) - 1); /* frame size */
|
||||||
|
if (s->bit_alloc.sr_shift) {
|
||||||
|
put_bits(&s->pb, 2, 0x3); /* fscod2 */
|
||||||
|
put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
|
||||||
|
} else {
|
||||||
|
put_bits(&s->pb, 2, s->bit_alloc.sr_code); /* sample rate code */
|
||||||
|
put_bits(&s->pb, 2, 0x3); /* number of blocks = 6 */
|
||||||
|
}
|
||||||
|
put_bits(&s->pb, 3, s->channel_mode); /* audio coding mode */
|
||||||
|
put_bits(&s->pb, 1, s->lfe_on); /* LFE channel indicator */
|
||||||
|
put_bits(&s->pb, 5, s->bitstream_id); /* bitstream id (EAC3=16) */
|
||||||
|
put_bits(&s->pb, 5, -opt->dialogue_level); /* dialogue normalization level */
|
||||||
|
put_bits(&s->pb, 1, 0); /* no compression gain */
|
||||||
|
put_bits(&s->pb, 1, 0); /* no mixing metadata */
|
||||||
|
/* TODO: mixing metadata */
|
||||||
|
put_bits(&s->pb, 1, 0); /* no info metadata */
|
||||||
|
/* TODO: info metadata */
|
||||||
|
put_bits(&s->pb, 1, 0); /* no additional bit stream info */
|
||||||
|
|
||||||
|
/* frame header */
|
||||||
|
put_bits(&s->pb, 1, 1); /* exponent strategy syntax = each block */
|
||||||
|
put_bits(&s->pb, 1, 0); /* aht enabled = no */
|
||||||
|
put_bits(&s->pb, 2, 0); /* snr offset strategy = 1 */
|
||||||
|
put_bits(&s->pb, 1, 0); /* transient pre-noise processing enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* block switch syntax enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* dither flag syntax enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* bit allocation model syntax enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* fast gain codes enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* dba syntax enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* skip field syntax enabled = no */
|
||||||
|
put_bits(&s->pb, 1, 0); /* spx enabled = no */
|
||||||
|
/* coupling strategy use flags */
|
||||||
|
if (s->channel_mode > AC3_CHMODE_MONO) {
|
||||||
|
put_bits(&s->pb, 1, s->blocks[0].cpl_in_use);
|
||||||
|
for (blk = 1; blk < AC3_MAX_BLOCKS; blk++) {
|
||||||
|
AC3Block *block = &s->blocks[blk];
|
||||||
|
put_bits(&s->pb, 1, block->new_cpl_strategy);
|
||||||
|
if (block->new_cpl_strategy)
|
||||||
|
put_bits(&s->pb, 1, block->cpl_in_use);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/* exponent strategy */
|
||||||
|
for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
|
||||||
|
for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++)
|
||||||
|
put_bits(&s->pb, 2, s->exp_strategy[ch][blk]);
|
||||||
|
if (s->lfe_on) {
|
||||||
|
for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
|
||||||
|
put_bits(&s->pb, 1, s->exp_strategy[s->lfe_channel][blk]);
|
||||||
|
}
|
||||||
|
/* E-AC-3 to AC-3 converter exponent strategy (unfortunately not optional...) */
|
||||||
|
for (ch = 1; ch <= s->fbw_channels; ch++)
|
||||||
|
put_bits(&s->pb, 5, 0);
|
||||||
|
/* snr offsets */
|
||||||
|
put_bits(&s->pb, 6, s->coarse_snr_offset);
|
||||||
|
put_bits(&s->pb, 4, s->fine_snr_offset[1]);
|
||||||
|
/* block start info */
|
||||||
|
put_bits(&s->pb, 1, 0);
|
||||||
|
}
|
|
@ -0,0 +1,44 @@
|
||||||
|
/*
|
||||||
|
* E-AC-3 encoder
|
||||||
|
* Copyright (c) 2011 Justin Ruggles <justin.ruggles@gmail.com>
|
||||||
|
*
|
||||||
|
* 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
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file
|
||||||
|
* E-AC-3 encoder
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef AVCODEC_EAC3ENC_H
|
||||||
|
#define AVCODEC_EAC3ENC_H
|
||||||
|
|
||||||
|
#include "ac3enc.h"
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set coupling states.
|
||||||
|
* This determines whether certain flags must be written to the bitstream or
|
||||||
|
* whether they will be implicitly already known by the decoder.
|
||||||
|
*/
|
||||||
|
void ff_eac3_set_cpl_states(AC3EncodeContext *s);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Write the E-AC-3 frame header to the output bitstream.
|
||||||
|
*/
|
||||||
|
void ff_eac3_output_frame_header(AC3EncodeContext *s);
|
||||||
|
|
||||||
|
#endif /* AVCODEC_EAC3ENC_H */
|
Loading…
Reference in New Issue