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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 "ttadsp.h" |
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#include "config.h" |
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static void tta_filter_process_c(int32_t *qmi, int32_t *dx, int32_t *dl, |
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int32_t *error, int32_t *in, int32_t shift, |
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int32_t round) { |
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uint32_t *qm = qmi; |
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✓✓ |
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if (*error < 0) { |
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qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3]; |
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qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7]; |
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✓✓ |
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} else if (*error > 0) { |
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qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3]; |
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qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7]; |
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} |
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round += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] + |
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dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7]; |
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dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4]; |
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dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4]; |
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dx[4] = ((dl[4] >> 30) | 1); |
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dx[5] = ((dl[5] >> 30) | 2) & ~1; |
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dx[6] = ((dl[6] >> 30) | 2) & ~1; |
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dx[7] = ((dl[7] >> 30) | 4) & ~3; |
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*error = *in; |
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*in += (round >> shift); |
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dl[4] = -dl[5]; dl[5] = -dl[6]; |
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dl[6] = *in - dl[7]; dl[7] = *in; |
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dl[5] += dl[6]; dl[4] += dl[5]; |
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} |
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av_cold void ff_ttadsp_init(TTADSPContext *c) |
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{ |
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c->filter_process = tta_filter_process_c; |
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if (ARCH_X86) |
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ff_ttadsp_init_x86(c); |
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} |