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Go to the source code of this file.
Data Structures | |
| struct | RA144Context |
Macros | |
| #define | NBLOCKS 4 |
| number of subblocks within a block More... | |
| #define | BLOCKSIZE 40 |
| subblock size in 16-bit words More... | |
| #define | BUFFERSIZE 146 |
| the size of the adaptive codebook More... | |
| #define | FIXED_CB_SIZE 128 |
| size of fixed codebooks More... | |
| #define | FRAME_SIZE 20 |
| size of encoded frame More... | |
| #define | LPC_ORDER 10 |
| order of LPC filter More... | |
Functions | |
| void | ff_copy_and_dup (int16_t *target, const int16_t *source, int offset) |
| Copy the last offset values of *source to *target. More... | |
| int | ff_eval_refl (int *refl, const int16_t *coefs, AVCodecContext *avctx) |
| Evaluate the reflection coefficients from the filter coefficients. More... | |
| void | ff_eval_coefs (int *coefs, const int *refl) |
| Evaluate the LPC filter coefficients from the reflection coefficients. More... | |
| void | ff_int_to_int16 (int16_t *out, const int *inp) |
| int | ff_t_sqrt (unsigned int x) |
| Evaluate sqrt(x << 24). More... | |
| unsigned int | ff_rms (const int *data) |
| int | ff_interp (RA144Context *ractx, int16_t *out, int a, int copyold, int energy) |
| unsigned int | ff_rescale_rms (unsigned int rms, unsigned int energy) |
| int | ff_irms (AudioDSPContext *adsp, const int16_t *data) |
| inverse root mean square More... | |
| void | ff_subblock_synthesis (RA144Context *ractx, const int16_t *lpc_coefs, int cba_idx, int cb1_idx, int cb2_idx, int gval, int gain) |
Variables | |
| const int16_t | ff_gain_val_tab [256][3] |
| const uint8_t | ff_gain_exp_tab [256] |
| const int8_t | ff_cb1_vects [128][40] |
| const int8_t | ff_cb2_vects [128][40] |
| const uint16_t | ff_cb1_base [128] |
| const uint16_t | ff_cb2_base [128] |
| const int16_t | ff_energy_tab [32] |
| const int16_t *const | ff_lpc_refl_cb [10] |
| #define NBLOCKS 4 |
number of subblocks within a block
Definition at line 30 of file ra144.h.
Referenced by ff_interp(), ra144_decode_frame(), ra144_encode_frame(), and ra144_encode_init().
| #define BLOCKSIZE 40 |
subblock size in 16-bit words
Definition at line 31 of file ra144.h.
Referenced by adaptive_cb_search(), add_wav(), create_adapt_vect(), ff_copy_and_dup(), ff_irms(), ff_subblock_synthesis(), find_best_vect(), fixed_cb_search(), get_match_score(), orthogonalize(), ra144_decode_frame(), ra144_encode_frame(), ra144_encode_init(), and ra144_encode_subblock().
| #define BUFFERSIZE 146 |
the size of the adaptive codebook
Definition at line 32 of file ra144.h.
Referenced by adaptive_cb_search(), create_adapt_vect(), ff_copy_and_dup(), and ff_subblock_synthesis().
| #define FIXED_CB_SIZE 128 |
Copy the last offset values of *source to *target.
If those values are not enough to fill the target buffer, fill it with another copy of those values.
Definition at line 1530 of file ra144.c.
Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().
| int ff_eval_refl | ( | int * | refl, |
| const int16_t * | coefs, | ||
| AVCodecContext * | avctx | ||
| ) |
Evaluate the reflection coefficients from the filter coefficients.
Definition at line 1545 of file ra144.c.
Referenced by ff_interp(), and ra144_encode_frame().
Evaluate the LPC filter coefficients from the reflection coefficients.
Does the inverse of the ff_eval_refl() function.
Definition at line 1593 of file ra144.c.
Referenced by ra144_decode_frame(), and ra144_encode_frame().
Definition at line 1613 of file ra144.c.
Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().
Evaluate sqrt(x << 24).
x must fit in 20 bits. This value is evaluated in an odd way to make the output identical to the binary decoder.
Definition at line 1625 of file ra144.c.
Referenced by ff_irms(), ff_rms(), ra144_decode_frame(), and ra144_encode_frame().
Definition at line 1636 of file ra144.c.
Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().
| int ff_interp | ( | RA144Context * | ractx, |
| int16_t * | out, | ||
| int | a, | ||
| int | copyold, | ||
| int | energy | ||
| ) |
Definition at line 1657 of file ra144.c.
Referenced by ra144_decode_frame(), and ra144_encode_frame().
Definition at line 1678 of file ra144.c.
Referenced by ff_interp(), ra144_decode_frame(), and ra144_encode_frame().
| int ff_irms | ( | AudioDSPContext * | adsp, |
| const int16_t * | data | ||
| ) |
inverse root mean square
Definition at line 1684 of file ra144.c.
Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().
| void ff_subblock_synthesis | ( | RA144Context * | ractx, |
| const int16_t * | lpc_coefs, | ||
| int | cba_idx, | ||
| int | cb1_idx, | ||
| int | cb2_idx, | ||
| int | gval, | ||
| int | gain | ||
| ) |
Definition at line 1694 of file ra144.c.
Referenced by do_output_subblock(), and ra144_encode_subblock().
| const int16_t ff_gain_val_tab[256][3] |
Definition at line 28 of file ra144.c.
Referenced by add_wav(), and ra144_encode_subblock().
| const uint8_t ff_gain_exp_tab[256] |
Definition at line 95 of file ra144.c.
Referenced by add_wav(), and ra144_encode_subblock().
| const int8_t ff_cb1_vects[128][40] |
Definition at line 114 of file ra144.c.
Referenced by ff_subblock_synthesis(), fixed_cb_search(), and ra144_encode_subblock().
| const int8_t ff_cb2_vects[128][40] |
Definition at line 758 of file ra144.c.
Referenced by ff_subblock_synthesis(), fixed_cb_search(), and ra144_encode_subblock().
| const uint16_t ff_cb1_base[128] |
Definition at line 1402 of file ra144.c.
Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().
| const uint16_t ff_cb2_base[128] |
Definition at line 1421 of file ra144.c.
Referenced by ff_subblock_synthesis(), and ra144_encode_subblock().
| const int16_t ff_energy_tab[32] |
Definition at line 1440 of file ra144.c.
Referenced by ra144_decode_frame(), and ra144_encode_frame().
| const int16_t* const ff_lpc_refl_cb[10] |
Definition at line 1502 of file ra144.c.
Referenced by ra144_decode_frame(), and ra144_encode_frame().
1.8.6