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g722: Split out g722_qmf_apply() function into g722dsp.c
Signed-off-by: Peter Meerwald <[email protected]> Signed-off-by: Martin Storsjö <[email protected]>
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/* | ||
* Copyright (c) 2015 Peter Meerwald <[email protected]> | ||
* | ||
* 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 | ||
*/ | ||
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#include "g722dsp.h" | ||
#include "mathops.h" | ||
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/* | ||
* quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined | ||
* in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11 | ||
*/ | ||
static const int16_t qmf_coeffs[12] = { | ||
3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11, | ||
}; | ||
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static void g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2) | ||
{ | ||
int i; | ||
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*xout1 = 0; | ||
*xout2 = 0; | ||
for (i = 0; i < 12; i++) { | ||
MAC16(*xout2, prev_samples[2*i ], qmf_coeffs[i ]); | ||
MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]); | ||
} | ||
} | ||
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av_cold void ff_g722dsp_init(G722DSPContext *c) | ||
{ | ||
c->apply_qmf = g722_apply_qmf; | ||
} |
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/* | ||
* Copyright (c) 2015 Peter Meerwald <[email protected]> | ||
* | ||
* 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 | ||
*/ | ||
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#ifndef AVCODEC_G722DSP_H | ||
#define AVCODEC_G722DSP_H | ||
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#include <stdint.h> | ||
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typedef struct G722DSPContext { | ||
void (*apply_qmf)(const int16_t *prev_samples, int *xout1, int *xout2); | ||
} G722DSPContext; | ||
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void ff_g722dsp_init(G722DSPContext *c); | ||
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#endif /* AVCODEC_G722DSP_H */ |
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