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Diffstat (limited to 'media/libstagefright/codecs/amrwbenc/inc/p_med_o.h')
-rw-r--r-- | media/libstagefright/codecs/amrwbenc/inc/p_med_o.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/inc/p_med_o.h b/media/libstagefright/codecs/amrwbenc/inc/p_med_o.h new file mode 100644 index 0000000..4a13f16 --- /dev/null +++ b/media/libstagefright/codecs/amrwbenc/inc/p_med_o.h @@ -0,0 +1,52 @@ +/* + ** Copyright 2003-2010, VisualOn, Inc. + ** + ** Licensed under the Apache License, Version 2.0 (the "License"); + ** you may not use this file except in compliance with the License. + ** You may obtain a copy of the License at + ** + ** http://www.apache.org/licenses/LICENSE-2.0 + ** + ** Unless required by applicable law or agreed to in writing, software + ** distributed under the License is distributed on an "AS IS" BASIS, + ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + ** See the License for the specific language governing permissions and + ** limitations under the License. + */ + +/*--------------------------------------------------------------------------* + * P_MED_O.H * + *--------------------------------------------------------------------------* + * Median open-loop lag search * + *--------------------------------------------------------------------------*/ + +#ifndef __P_MED_O_H__ +#define __P_MED_O_H__ + +Word16 Pitch_med_ol( /* output: open loop pitch lag */ + Word16 wsp[], /* input : signal used to compute the open loop pitch */ + /* wsp[-pit_max] to wsp[-1] should be known */ + Word16 L_min, /* input : minimum pitch lag */ + Word16 L_max, /* input : maximum pitch lag */ + Word16 L_frame, /* input : length of frame to compute pitch */ + Word16 L_0, /* input : old_ open-loop pitch */ + Word16 * gain, /* output: normalize correlation of hp_wsp for the Lag */ + Word16 * hp_wsp_mem, /* i:o : memory of the hypass filter for hp_wsp[] (lg=9) */ + Word16 * old_hp_wsp, /* i:o : hypass wsp[] */ + Word16 wght_flg /* input : is weighting function used */ + ); + +Word16 Med_olag( /* output : median of 5 previous open-loop lags */ + Word16 prev_ol_lag, /* input : previous open-loop lag */ + Word16 old_ol_lag[5] + ); + +void Hp_wsp( + Word16 wsp[], /* i : wsp[] signal */ + Word16 hp_wsp[], /* o : hypass wsp[] */ + Word16 lg, /* i : lenght of signal */ + Word16 mem[] /* i/o : filter memory [9] */ + ); + +#endif //__P_MED_O_H__ + |