/* * Optimization of some functions from mpegvideo.c for armv5te * Copyright (c) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net> * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/attributes.h" #include "libavcodec/avcodec.h" #include "libavcodec/dsputil.h" #include "libavcodec/mpegvideo.h" #include "mpegvideo_arm.h" void ff_dct_unquantize_h263_armv5te(int16_t *block, int qmul, int qadd, int count); #ifdef ENABLE_ARM_TESTS /** * h263 dequantizer supplementary function, it is performance critical and needs to * have optimized implementations for each architecture. Is also used as a reference * implementation in regression tests */ static inline void dct_unquantize_h263_helper_c(int16_t *block, int qmul, int qadd, int count) { int i, level; for (i = 0; i < count; i++) { level = block[i]; if (level) { if (level < 0) { level = level * qmul - qadd; } else { level = level * qmul + qadd; } block[i] = level; } } } #endif static void dct_unquantize_h263_intra_armv5te(MpegEncContext *s, int16_t *block, int n, int qscale) { int level, qmul, qadd; int nCoeffs; assert(s->block_last_index[n]>=0); qmul = qscale << 1; if (!s->h263_aic) { if (n < 4) level = block[0] * s->y_dc_scale; else level = block[0] * s->c_dc_scale; qadd = (qscale - 1) | 1; }else{ qadd = 0; level = block[0]; } if(s->ac_pred) nCoeffs=63; else nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); block[0] = level; } static void dct_unquantize_h263_inter_armv5te(MpegEncContext *s, int16_t *block, int n, int qscale) { int qmul, qadd; int nCoeffs; assert(s->block_last_index[n]>=0); qadd = (qscale - 1) | 1; qmul = qscale << 1; nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1); } av_cold void ff_MPV_common_init_armv5te(MpegEncContext *s) { s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_armv5te; s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_armv5te; }