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102 lines
3.0 KiB
102 lines
3.0 KiB
/* |
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* Optimization of some functions from mpegvideo.c for armv5te |
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* Copyright (c) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/attributes.h" |
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#include "libavutil/avassert.h" |
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#include "libavcodec/avcodec.h" |
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#include "libavcodec/mpegvideo.h" |
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#include "mpegvideo_arm.h" |
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void ff_dct_unquantize_h263_armv5te(int16_t *block, int qmul, int qadd, int count); |
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#ifdef ENABLE_ARM_TESTS |
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/** |
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* h263 dequantizer supplementary function, it is performance critical and needs to |
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* have optimized implementations for each architecture. Is also used as a reference |
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* implementation in regression tests |
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*/ |
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static inline void dct_unquantize_h263_helper_c(int16_t *block, int qmul, int qadd, int count) |
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{ |
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int i, level; |
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for (i = 0; i < count; i++) { |
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level = block[i]; |
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if (level) { |
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if (level < 0) { |
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level = level * qmul - qadd; |
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} else { |
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level = level * qmul + qadd; |
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} |
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block[i] = level; |
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} |
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} |
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} |
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#endif |
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static void dct_unquantize_h263_intra_armv5te(MpegEncContext *s, |
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int16_t *block, int n, int qscale) |
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{ |
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int level, qmul, qadd; |
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int nCoeffs; |
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av_assert2(s->block_last_index[n]>=0); |
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qmul = qscale << 1; |
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if (!s->h263_aic) { |
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if (n < 4) |
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level = block[0] * s->y_dc_scale; |
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else |
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level = block[0] * s->c_dc_scale; |
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qadd = (qscale - 1) | 1; |
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}else{ |
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qadd = 0; |
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level = block[0]; |
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} |
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if(s->ac_pred) |
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nCoeffs=63; |
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else |
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nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; |
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ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); |
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block[0] = level; |
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} |
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static void dct_unquantize_h263_inter_armv5te(MpegEncContext *s, |
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int16_t *block, int n, int qscale) |
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{ |
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int qmul, qadd; |
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int nCoeffs; |
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av_assert2(s->block_last_index[n]>=0); |
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qadd = (qscale - 1) | 1; |
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qmul = qscale << 1; |
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nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; |
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ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); |
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} |
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av_cold void ff_mpv_common_init_armv5te(MpegEncContext *s) |
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{ |
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s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_armv5te; |
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s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_armv5te; |
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}
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