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Diffstat (limited to 'libavcodec/acelp_pitch_delay.h')
| -rw-r--r-- | libavcodec/acelp_pitch_delay.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavcodec/acelp_pitch_delay.h b/libavcodec/acelp_pitch_delay.h index 42307d2bba..2413145beb 100644 --- a/libavcodec/acelp_pitch_delay.h +++ b/libavcodec/acelp_pitch_delay.h @@ -234,4 +234,22 @@ float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy, float *prediction_error, float energy_mean, const float *pred_table); + +/** + * Decode the adaptive codebook index to the integer and fractional parts + * of the pitch lag for one subframe at 1/3 fractional precision. + * + * The choice of pitch lag is described in 3GPP TS 26.090 section 5.6.1. + * + * @param lag_int integer part of pitch lag of the current subframe + * @param lag_frac fractional part of pitch lag of the current subframe + * @param pitch_index parsed adaptive codebook (pitch) index + * @param prev_lag_int integer part of pitch lag for the previous subframe + * @param subframe current subframe number + * @param third_as_first treat the third frame the same way as the first + */ +void ff_decode_pitch_lag(int *lag_int, int *lag_frac, int pitch_index, + const int prev_lag_int, const int subframe, + int third_as_first, int resolution); + #endif /* AVCODEC_ACELP_PITCH_DELAY_H */ |