mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
3ade6a8644
Old one was written with the assumption only even inputs would be given. This very messy replacement supports even and odd inputs, and supports AVX2 for extra speed. The buffers given are usually quite big (4k samples), so the speedup is worth it. The new SSE version is still faster than the old inline asm version by 33%. Also checkasm is provided to make sure this monstrosity works. This fixes some FATE tests.
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "libavutil/mem_internal.h"
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#include "libavcodec/lpc.h"
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#include "checkasm.h"
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#define randomize_int32(buf, len) \
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do { \
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for (int i = 0; i < len; i++) { \
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int32_t f = rnd() >> 8; \
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buf[i] = f; \
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} \
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} while (0)
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#define EPS 0.005
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static void test_window(int len)
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{
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LOCAL_ALIGNED(16, int32_t, src, [5000]);
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LOCAL_ALIGNED(16, double, dst0, [5000]);
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LOCAL_ALIGNED(16, double, dst1, [5000]);
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declare_func(void, int32_t *in, int len, double *out);
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randomize_int32(src, len);
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call_ref(src, len, dst0);
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call_new(src, len, dst1);
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if (!double_near_abs_eps_array(dst0, dst1, EPS, len))
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fail();
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bench_new(src, len, dst1);
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}
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void checkasm_check_lpc(void)
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{
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LPCContext ctx;
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ff_lpc_init(&ctx, 32, 16, FF_LPC_TYPE_DEFAULT);
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if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_even")) {
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for (int i = 0; i < 64; i += 2)
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test_window(i);
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}
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report("apply_welch_window_even");
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if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_odd")) {
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for (int i = 1; i < 64; i += 2)
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test_window(i);
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}
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report("apply_welch_window_odd");
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if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_4096"))
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test_window(4096);
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report("apply_welch_window_4096");
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if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_4097"))
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test_window(4097);
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report("apply_welch_window_4097");
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ff_lpc_end(&ctx);
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}
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