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76 lines
2.3 KiB
76 lines
2.3 KiB
/* |
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* Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.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 "g722dsp.h" |
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#include "mathops.h" |
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/* |
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* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined |
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* in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11 |
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*/ |
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static void g722_apply_qmf(const int16_t *prev_samples, int xout[2]) |
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{ |
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xout[1] = MUL16(*prev_samples++, 3); |
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xout[0] = MUL16(*prev_samples++, -11); |
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MAC16(xout[1], *prev_samples++, -11); |
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MAC16(xout[0], *prev_samples++, 53); |
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MAC16(xout[1], *prev_samples++, 12); |
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MAC16(xout[0], *prev_samples++, -156); |
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MAC16(xout[1], *prev_samples++, 32); |
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MAC16(xout[0], *prev_samples++, 362); |
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MAC16(xout[1], *prev_samples++, -210); |
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MAC16(xout[0], *prev_samples++, -805); |
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MAC16(xout[1], *prev_samples++, 951); |
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MAC16(xout[0], *prev_samples++, 3876); |
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MAC16(xout[1], *prev_samples++, 3876); |
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MAC16(xout[0], *prev_samples++, 951); |
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MAC16(xout[1], *prev_samples++, -805); |
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MAC16(xout[0], *prev_samples++, -210); |
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MAC16(xout[1], *prev_samples++, 362); |
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MAC16(xout[0], *prev_samples++, 32); |
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MAC16(xout[1], *prev_samples++, -156); |
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MAC16(xout[0], *prev_samples++, 12); |
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MAC16(xout[1], *prev_samples++, 53); |
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MAC16(xout[0], *prev_samples++, -11); |
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MAC16(xout[1], *prev_samples++, -11); |
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MAC16(xout[0], *prev_samples++, 3); |
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} |
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av_cold void ff_g722dsp_init(G722DSPContext *c) |
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{ |
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c->apply_qmf = g722_apply_qmf; |
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if (ARCH_ARM) |
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ff_g722dsp_init_arm(c); |
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if (ARCH_X86) |
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ff_g722dsp_init_x86(c); |
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}
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