repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Optimization of some functions from mpegvideo.c for armv5te | |
| 3 | * Copyright (c) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net> | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include "libavutil/attributes.h" | |
| 23 | #include "libavutil/avassert.h" | |
| 24 | #include "libavcodec/avcodec.h" | |
| 25 | #include "libavcodec/mpegvideo.h" | |
| 26 | #include "mpegvideo_arm.h" | |
| 27 | ||
| 28 | void ff_dct_unquantize_h263_armv5te(int16_t *block, int qmul, int qadd, int count); | |
| 29 | ||
| 30 | #ifdef ENABLE_ARM_TESTS | |
| 31 | /** | |
| 32 | * h263 dequantizer supplementary function, it is performance critical and needs to | |
| 33 | * have optimized implementations for each architecture. Is also used as a reference | |
| 34 | * implementation in regression tests | |
| 35 | */ | |
| 36 | static inline void dct_unquantize_h263_helper_c(int16_t *block, int qmul, int qadd, int count) | |
| 37 | { | |
| 38 | int i, level; | |
| 39 | for (i = 0; i < count; i++) { | |
| 40 | level = block[i]; | |
| 41 | if (level) { | |
| 42 | if (level < 0) { | |
| 43 | level = level * qmul - qadd; | |
| 44 | } else { | |
| 45 | level = level * qmul + qadd; | |
| 46 | } | |
| 47 | block[i] = level; | |
| 48 | } | |
| 49 | } | |
| 50 | } | |
| 51 | #endif | |
| 52 | ||
| 53 | static void dct_unquantize_h263_intra_armv5te(MpegEncContext *s, | |
| 54 | int16_t *block, int n, int qscale) | |
| 55 | { | |
| 56 | int level, qmul, qadd; | |
| 57 | int nCoeffs; | |
| 58 | ||
| 59 | av_assert2(s->block_last_index[n]>=0); | |
| 60 | ||
| 61 | qmul = qscale << 1; | |
| 62 | ||
| 63 | if (!s->h263_aic) { | |
| 64 | if (n < 4) | |
| 65 | level = block[0] * s->y_dc_scale; | |
| 66 | else | |
| 67 | level = block[0] * s->c_dc_scale; | |
| 68 | qadd = (qscale - 1) | 1; | |
| 69 | }else{ | |
| 70 | qadd = 0; | |
| 71 | level = block[0]; | |
| 72 | } | |
| 73 | if(s->ac_pred) | |
| 74 | nCoeffs=63; | |
| 75 | else | |
| 76 | nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; | |
| 77 | ||
| 78 | ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); | |
| 79 | block[0] = level; | |
| 80 | } | |
| 81 | ||
| 82 | static void dct_unquantize_h263_inter_armv5te(MpegEncContext *s, | |
| 83 | int16_t *block, int n, int qscale) | |
| 84 | { | |
| 85 | int qmul, qadd; | |
| 86 | int nCoeffs; | |
| 87 | ||
| 88 | av_assert2(s->block_last_index[n]>=0); | |
| 89 | ||
| 90 | qadd = (qscale - 1) | 1; | |
| 91 | qmul = qscale << 1; | |
| 92 | ||
| 93 | nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; | |
| 94 | ||
| 95 | ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); | |
| 96 | } | |
| 97 | ||
| 98 | av_cold void ff_mpv_common_init_armv5te(MpegEncContext *s) | |
| 99 | { | |
| 100 | s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_armv5te; | |
| 101 | s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_armv5te; | |
| 102 | } |