#define AVCODEC_AC3ENC_H
#include <stdint.h>
+
+#include "libavutil/float_dsp.h"
#include "ac3.h"
#include "ac3dsp.h"
#include "avcodec.h"
#define CONFIG_AC3ENC_FLOAT 0
#endif
+#define OFFSET(param) offsetof(AC3EncodeContext, options.param)
+#define AC3ENC_PARAM (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
+
+#define AC3ENC_TYPE_AC3_FIXED 0
+#define AC3ENC_TYPE_AC3 1
+#define AC3ENC_TYPE_EAC3 2
+
#if CONFIG_AC3ENC_FLOAT
+#define AC3_NAME(x) ff_ac3_float_ ## x
#define MAC_COEF(d,a,b) ((d)+=(a)*(b))
+#define COEF_MIN (-16777215.0/16777216.0)
+#define COEF_MAX ( 16777215.0/16777216.0)
+#define NEW_CPL_COORD_THRESHOLD 0.03
typedef float SampleType;
typedef float CoefType;
typedef float CoefSumType;
#else
+#define AC3_NAME(x) ff_ac3_fixed_ ## x
#define MAC_COEF(d,a,b) MAC64(d,a,b)
+#define COEF_MIN -16777215
+#define COEF_MAX 16777215
+#define NEW_CPL_COORD_THRESHOLD 503317
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;
+/* common option values */
+#define AC3ENC_OPT_NONE -1
+#define AC3ENC_OPT_AUTO -1
+#define AC3ENC_OPT_OFF 0
+#define AC3ENC_OPT_ON 1
+#define AC3ENC_OPT_NOT_INDICATED 0
+#define AC3ENC_OPT_MODE_ON 2
+#define AC3ENC_OPT_MODE_OFF 1
+
+/* specific option values */
+#define AC3ENC_OPT_LARGE_ROOM 1
+#define AC3ENC_OPT_SMALL_ROOM 2
+#define AC3ENC_OPT_DOWNMIX_LTRT 1
+#define AC3ENC_OPT_DOWNMIX_LORO 2
+#define AC3ENC_OPT_ADCONV_STANDARD 0
+#define AC3ENC_OPT_ADCONV_HDCD 1
+
/**
* Encoding Options used by AVOption.
int dolby_surround_ex_mode;
int dolby_headphone_mode;
int ad_converter_type;
+ int eac3_mixing_metadata;
+ int eac3_info_metadata;
/* other encoding options */
int allow_per_frame_metadata;
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 new_cpl_coords[AC3_MAX_CHANNELS]; ///< 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
typedef struct AC3EncodeContext {
AVClass *av_class; ///< AVClass used for AVOption
AC3EncOptions options; ///< encoding options
+ AVCodecContext *avctx; ///< parent AVCodecContext
PutBitContext pb; ///< bitstream writer context
DSPContext dsp;
+ AVFloatDSPContext fdsp;
AC3DSPContext ac3dsp; ///< AC-3 optimized functions
- AC3MDCTContext mdct; ///< MDCT context
+ FFTContext mdct; ///< FFT context for MDCT calculation
+ const SampleType *mdct_window; ///< MDCT window function array
AC3Block blocks[AC3_MAX_BLOCKS]; ///< per-block info
+ int fixed_point; ///< indicates if fixed-point encoder is being used
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 num_blks_code; ///< number of blocks code (numblkscod)
+ int num_blocks; ///< number of blocks per frame
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)
int frame_bits; ///< all frame bits except exponents and mantissas
int exponent_bits; ///< number of bits used for exponents
+ SampleType *windowed_samples;
SampleType **planar_samples;
uint8_t *bap_buffer;
uint8_t *bap1_buffer;
int16_t *psd_buffer;
int16_t *band_psd_buffer;
int16_t *mask_buffer;
- uint16_t *qmant_buffer;
+ int16_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 frame_exp_strategy[AC3_MAX_CHANNELS]; ///< frame exp strategy index
+ int use_frame_exp_strategy; ///< indicates use of frame exp strategy
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];
+ /* fixed vs. float function pointers */
+ void (*mdct_end)(struct AC3EncodeContext *s);
+ int (*mdct_init)(struct AC3EncodeContext *s);
+
+ /* fixed vs. float templated function pointers */
+ int (*allocate_sample_buffers)(struct AC3EncodeContext *s);
+ /* AC-3 vs. E-AC-3 function pointers */
void (*output_frame_header)(struct AC3EncodeContext *s);
} AC3EncodeContext;
+
+extern const uint64_t ff_ac3_channel_layouts[19];
+
+int ff_ac3_encode_init(AVCodecContext *avctx);
+
+int ff_ac3_encode_close(AVCodecContext *avctx);
+
+int ff_ac3_validate_metadata(AC3EncodeContext *s);
+
+void ff_ac3_adjust_frame_size(AC3EncodeContext *s);
+
+void ff_ac3_compute_coupling_strategy(AC3EncodeContext *s);
+
+void ff_ac3_apply_rematrixing(AC3EncodeContext *s);
+
+void ff_ac3_process_exponents(AC3EncodeContext *s);
+
+int ff_ac3_compute_bit_allocation(AC3EncodeContext *s);
+
+void ff_ac3_group_exponents(AC3EncodeContext *s);
+
+void ff_ac3_quantize_mantissas(AC3EncodeContext *s);
+
+void ff_ac3_output_frame(AC3EncodeContext *s, unsigned char *frame);
+
+
+/* prototypes for functions in ac3enc_fixed.c and ac3enc_float.c */
+
+void ff_ac3_fixed_mdct_end(AC3EncodeContext *s);
+void ff_ac3_float_mdct_end(AC3EncodeContext *s);
+
+int ff_ac3_fixed_mdct_init(AC3EncodeContext *s);
+int ff_ac3_float_mdct_init(AC3EncodeContext *s);
+
+
+/* prototypes for functions in ac3enc_template.c */
+
+int ff_ac3_fixed_allocate_sample_buffers(AC3EncodeContext *s);
+int ff_ac3_float_allocate_sample_buffers(AC3EncodeContext *s);
+
+int ff_ac3_fixed_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr);
+int ff_ac3_float_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr);
+
#endif /* AVCODEC_AC3ENC_H */
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