diff options
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/mlpdsp.c')
-rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/mlpdsp.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/mlpdsp.c b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/mlpdsp.c new file mode 100644 index 000000000..129a01187 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/mlpdsp.c @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2007-2008 Ian Caulfield + * 2009 Ramiro Polla + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavcodec/mlp.h" +#include "dsputil.h" + +static void ff_mlp_filter_channel(int32_t *state, const int32_t *coeff, + int firorder, int iirorder, + unsigned int filter_shift, int32_t mask, int blocksize, + int32_t *sample_buffer) +{ + int32_t *firbuf = state; + int32_t *iirbuf = state + MAX_BLOCKSIZE + MAX_FIR_ORDER; + const int32_t *fircoeff = coeff; + const int32_t *iircoeff = coeff + MAX_FIR_ORDER; + int i; + + for (i = 0; i < blocksize; i++) { + int32_t residual = *sample_buffer; + unsigned int order; + int64_t accum = 0; + int32_t result; + + for (order = 0; order < firorder; order++) + accum += (int64_t) firbuf[order] * fircoeff[order]; + for (order = 0; order < iirorder; order++) + accum += (int64_t) iirbuf[order] * iircoeff[order]; + + accum = accum >> filter_shift; + result = (accum + residual) & mask; + + *--firbuf = result; + *--iirbuf = result - accum; + + *sample_buffer = result; + sample_buffer += MAX_CHANNELS; + } +} + +void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx); + +void ff_mlp_init(DSPContext* c, AVCodecContext *avctx) +{ + c->mlp_filter_channel = ff_mlp_filter_channel; +#if HAVE_MMX + if (ARCH_X86) + ff_mlp_init_x86(c, avctx); +#endif +} |