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64 lines
2.5 KiB
64 lines
2.5 KiB
/****************************************************************************** |
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* |
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* Copyright (C) 2015 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at: |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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***************************************************************************** |
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
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*/ |
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#ifndef _EST_SAD_H_ |
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#define _EST_SAD_H_ |
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/* |
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* "est_sad_t->i4_use_est_intra_sad" Flag to control how the I frame SAD is estimated. |
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* If set to zero |
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* - it uses the Intra sad calculated by the previous P frame as |
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* the estimated sad for the current I frame |
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* else |
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* - it uses the ratio of P frame sads of the previous two GOPS and |
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* scales the I Frame sad with this ratio to estimate the current |
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* I frame SAD |
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*/ |
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/* Estimating the Average SAD for the current picture type is done by: |
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* 1) if picture_type is I |
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* - Estimated SAD = (n-1)th intra frame interval(ifi) P frame Avg SAD * |
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* ( prev I frame SAD / (n-2)nd intra frame interval(ifi) P frame Avg SAD) |
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* - if only one IFI is encoded use the previous I frame SAD |
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* 2) if picture type is P |
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* - Estimate SAD is previous P frame SAD |
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* 3) The first P frame in a IFI could use a little better logic to decide the |
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* estimated SAD but currently we assume the last coded P frames SAD |
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a*/ |
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typedef struct est_sad_t *est_sad_handle; |
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WORD32 irc_est_sad_num_fill_use_free_memtab(est_sad_handle *est_sad, |
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itt_memtab_t *ps_memtab, |
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ITT_FUNC_TYPE_E e_func_type); |
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void irc_init_est_sad(est_sad_handle est_sad, WORD32 i4_use_est_frame_sad); |
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UWORD32 irc_get_est_sad(est_sad_handle est_sad, picture_type_e e_pic_type); |
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void irc_update_actual_sad(est_sad_handle est_sad, |
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UWORD32 u4_actual_sad, |
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picture_type_e e_pic_type); |
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void irc_update_actual_sad_for_intra(est_sad_handle est_sad, |
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WORD32 i4_intra_frm_cost); |
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void irc_reset_est_sad(est_sad_handle ps_est_sad); |
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#endif
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