Data Fields | |
| AMRNBFrame | frame |
| decoded AMR parameters (lsf coefficients, codebook indexes, etc) | |
| uint8_t | bad_frame_indicator |
| bad frame ? 1 : 0 | |
| enum Mode | cur_frame_mode |
| int16_t | prev_lsf_r [LP_FILTER_ORDER] |
| residual LSF vector from previous subframe | |
| double | lsp [4][LP_FILTER_ORDER] |
| lsp vectors from current frame | |
| double | prev_lsp_sub4 [LP_FILTER_ORDER] |
| lsp vector for the 4th subframe of the previous frame | |
| float | lsf_q [4][LP_FILTER_ORDER] |
| Interpolated LSF vector for fixed gain smoothing. | |
| float | lsf_avg [LP_FILTER_ORDER] |
| vector of averaged lsf vector | |
| float | lpc [4][LP_FILTER_ORDER] |
| lpc coefficient vectors for 4 subframes | |
| uint8_t | pitch_lag_int |
| integer part of pitch lag from current subframe | |
| float | excitation_buf [PITCH_DELAY_MAX+LP_FILTER_ORDER+1+AMR_SUBFRAME_SIZE] |
| current excitation and all necessary excitation history | |
| float * | excitation |
| pointer to the current excitation vector in excitation_buf | |
| float | pitch_vector [AMR_SUBFRAME_SIZE] |
| adaptive code book (pitch) vector | |
| float | fixed_vector [AMR_SUBFRAME_SIZE] |
| algebraic codebook (fixed) vector (must be kept zero between frames) | |
| float | prediction_error [4] |
| quantified prediction errors {20log10(^gamma_gc)} for previous four subframes | |
| float | pitch_gain [5] |
| quantified pitch gains for the current and previous four subframes | |
| float | fixed_gain [5] |
| quantified fixed gains for the current and previous four subframes | |
| float | beta |
| previous pitch_gain, bounded by [0.0,SHARP_MAX] | |
| uint8_t | diff_count |
| the number of subframes for which diff has been above 0.65 | |
| uint8_t | hang_count |
| the number of subframes since a hangover period started | |
| float | prev_sparse_fixed_gain |
| previous fixed gain; used by anti-sparseness processing to determine "onset" | |
| uint8_t | prev_ir_filter_nr |
| previous impulse response filter "impNr": 0 - strong, 1 - medium, 2 - none | |
| uint8_t | ir_filter_onset |
| flag for impulse response filter strength | |
| float | postfilter_mem [10] |
| previous intermediate values in the formant filter | |
| float | tilt_mem |
| previous input to tilt compensation filter | |
| float | postfilter_agc |
| previous factor used for adaptive gain control | |
| float | high_pass_mem [2] |
| previous intermediate values in the high-pass filter | |
| float | samples_in [LP_FILTER_ORDER+AMR_SUBFRAME_SIZE] |
| floating point samples | |
Definition at line 96 of file amrnbdec.c.
| uint8_t AMRContext::bad_frame_indicator |
| float AMRContext::beta |
previous pitch_gain, bounded by [0.0,SHARP_MAX]
Definition at line 122 of file amrnbdec.c.
Referenced by pitch_sharpening().
Definition at line 99 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), anti_sparseness(), decode_pitch_vector(), lsf2lsp_3(), postfilter(), and synthesis().
| uint8_t AMRContext::diff_count |
the number of subframes for which diff has been above 0.65
Definition at line 123 of file amrnbdec.c.
Referenced by fixed_gain_smooth().
| float* AMRContext::excitation |
pointer to the current excitation vector in excitation_buf
Definition at line 113 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), amrnb_decode_init(), and decode_pitch_vector().
| float AMRContext::excitation_buf[PITCH_DELAY_MAX+LP_FILTER_ORDER+1+AMR_SUBFRAME_SIZE] |
current excitation and all necessary excitation history
Definition at line 112 of file amrnbdec.c.
Referenced by amrnb_decode_init(), and update_state().
| float AMRContext::fixed_gain[5] |
quantified fixed gains for the current and previous four subframes
Definition at line 120 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), fixed_gain_smooth(), and update_state().
| float AMRContext::fixed_vector[AMR_SUBFRAME_SIZE] |
algebraic codebook (fixed) vector (must be kept zero between frames)
Definition at line 116 of file amrnbdec.c.
Referenced by amrnb_decode_frame().
decoded AMR parameters (lsf coefficients, codebook indexes, etc)
Definition at line 97 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), decode_gains(), lsf2lsp_3(), lsf2lsp_5(), and unpack_bitstream().
| uint8_t AMRContext::hang_count |
the number of subframes since a hangover period started
Definition at line 124 of file amrnbdec.c.
Referenced by fixed_gain_smooth().
| float AMRContext::high_pass_mem[2] |
previous intermediate values in the high-pass filter
Definition at line 133 of file amrnbdec.c.
Referenced by amrnb_decode_frame().
| uint8_t AMRContext::ir_filter_onset |
flag for impulse response filter strength
Definition at line 128 of file amrnbdec.c.
Referenced by anti_sparseness().
| float AMRContext::lpc[4][LP_FILTER_ORDER] |
lpc coefficient vectors for 4 subframes
Definition at line 108 of file amrnbdec.c.
Referenced by amrnb_decode_frame().
| float AMRContext::lsf_avg[LP_FILTER_ORDER] |
vector of averaged lsf vector
Definition at line 106 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), and amrnb_decode_init().
| float AMRContext::lsf_q[4][LP_FILTER_ORDER] |
Interpolated LSF vector for fixed gain smoothing.
Definition at line 105 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), amrnb_decode_init(), lsf2lsp_3(), and lsf2lsp_for_mode12k2().
| double AMRContext::lsp[4][LP_FILTER_ORDER] |
lsp vectors from current frame
Definition at line 102 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), lsf2lsp_3(), lsf2lsp_5(), and update_state().
| float AMRContext::pitch_gain[5] |
quantified pitch gains for the current and previous four subframes
Definition at line 119 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), anti_sparseness(), decode_gains(), pitch_sharpening(), synthesis(), and update_state().
| uint8_t AMRContext::pitch_lag_int |
integer part of pitch lag from current subframe
Definition at line 110 of file amrnbdec.c.
Referenced by decode_pitch_vector(), and pitch_sharpening().
| float AMRContext::pitch_vector[AMR_SUBFRAME_SIZE] |
adaptive code book (pitch) vector
Definition at line 115 of file amrnbdec.c.
Referenced by decode_pitch_vector(), and synthesis().
previous factor used for adaptive gain control
Definition at line 132 of file amrnbdec.c.
Referenced by postfilter().
| float AMRContext::postfilter_mem[10] |
previous intermediate values in the formant filter
Definition at line 130 of file amrnbdec.c.
Referenced by postfilter().
| float AMRContext::prediction_error[4] |
quantified prediction errors {20log10(^gamma_gc)} for previous four subframes
Definition at line 118 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), and amrnb_decode_init().
| uint8_t AMRContext::prev_ir_filter_nr |
previous impulse response filter "impNr": 0 - strong, 1 - medium, 2 - none
Definition at line 127 of file amrnbdec.c.
Referenced by anti_sparseness().
| int16_t AMRContext::prev_lsf_r[LP_FILTER_ORDER] |
residual LSF vector from previous subframe
Definition at line 101 of file amrnbdec.c.
Referenced by lsf2lsp_3(), lsf2lsp_5(), and lsf2lsp_for_mode12k2().
| double AMRContext::prev_lsp_sub4[LP_FILTER_ORDER] |
lsp vector for the 4th subframe of the previous frame
Definition at line 103 of file amrnbdec.c.
Referenced by amrnb_decode_init(), lsf2lsp_3(), lsf2lsp_5(), and update_state().
previous fixed gain; used by anti-sparseness processing to determine "onset"
Definition at line 126 of file amrnbdec.c.
Referenced by anti_sparseness().
| float AMRContext::samples_in[LP_FILTER_ORDER+AMR_SUBFRAME_SIZE] |
floating point samples
Definition at line 135 of file amrnbdec.c.
Referenced by amrnb_decode_frame(), postfilter(), and update_state().
| float AMRContext::tilt_mem |
previous input to tilt compensation filter
Definition at line 131 of file amrnbdec.c.
Referenced by postfilter().
1.5.8