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author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-02-10 20:20:36 +0300 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2011-02-11 04:54:09 +0300 |
commit | a30ac54a19d27920ec262ebb104e1f48092a3715 (patch) | |
tree | b10fb52d87c891e190faf757d665b7c254dace2c /libavcodec/ac3dsp.h | |
parent | 952f231588c18cd1a95e001c517f2d529017363f (diff) |
Add x86-optimized versions of exponent_min().
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit dda3f0ef48aa5c3b03566b60b6bf63211e1fe579)
Diffstat (limited to 'libavcodec/ac3dsp.h')
-rw-r--r-- | libavcodec/ac3dsp.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/libavcodec/ac3dsp.h b/libavcodec/ac3dsp.h new file mode 100644 index 0000000000..7f13b11f3b --- /dev/null +++ b/libavcodec/ac3dsp.h @@ -0,0 +1,43 @@ +/* + * AC-3 DSP utils + * Copyright (c) 2011 Justin Ruggles + * + * 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 + */ + +#ifndef AVCODEC_AC3DSP_H +#define AVCODEC_AC3DSP_H + +#include <stdint.h> + +typedef struct AC3DSPContext { + /** + * Set each encoded exponent in a block to the minimum of itself and the + * exponents in the same frequency bin of up to 5 following blocks. + * @param exp pointer to the start of the current block of exponents. + * constraints: align 16 + * @param num_reuse_blocks number of blocks that will reuse exponents from the current block. + * constraints: range 0 to 5 + * @param nb_coefs number of frequency coefficients. + */ + void (*ac3_exponent_min)(uint8_t *exp, int num_reuse_blocks, int nb_coefs); +} AC3DSPContext; + +void ff_ac3dsp_init (AC3DSPContext *c); +void ff_ac3dsp_init_x86(AC3DSPContext *c); + +#endif /* AVCODEC_AC3DSP_H */ |