mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
97c3c9974c
Even though they have the same size, and typically the same alignment, uint32_t and float are under no circumstances compatible types in C. The casts from float * to uint32_t * are invalid here. Insofar as the resulting pointers are dereferenced, this is undefined behaviour. This patch uses av_float2int() / av_int2float() instead.
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/common.h"
|
|
#include "audiodsp.h"
|
|
|
|
static inline float clipf_c_one(float a, uint32_t mini,
|
|
uint32_t maxi, uint32_t maxisign)
|
|
{
|
|
uint32_t ai = av_float2int(a);
|
|
|
|
if (ai > mini)
|
|
return av_int2float(mini);
|
|
else if ((ai ^ (1U << 31)) > maxisign)
|
|
return av_int2float(maxi);
|
|
else
|
|
return a;
|
|
}
|
|
|
|
static void vector_clipf_c_opposite_sign(float *dst, const float *src,
|
|
float min, float max, int len)
|
|
{
|
|
int i;
|
|
uint32_t mini = av_float2int(min);
|
|
uint32_t maxi = av_float2int(max);
|
|
uint32_t maxisign = maxi ^ (1U << 31);
|
|
|
|
for (i = 0; i < len; i += 8) {
|
|
dst[i + 0] = clipf_c_one(src[i + 0], mini, maxi, maxisign);
|
|
dst[i + 1] = clipf_c_one(src[i + 1], mini, maxi, maxisign);
|
|
dst[i + 2] = clipf_c_one(src[i + 2], mini, maxi, maxisign);
|
|
dst[i + 3] = clipf_c_one(src[i + 3], mini, maxi, maxisign);
|
|
dst[i + 4] = clipf_c_one(src[i + 4], mini, maxi, maxisign);
|
|
dst[i + 5] = clipf_c_one(src[i + 5], mini, maxi, maxisign);
|
|
dst[i + 6] = clipf_c_one(src[i + 6], mini, maxi, maxisign);
|
|
dst[i + 7] = clipf_c_one(src[i + 7], mini, maxi, maxisign);
|
|
}
|
|
}
|
|
|
|
static void vector_clipf_c(float *dst, const float *src, int len,
|
|
float min, float max)
|
|
{
|
|
int i;
|
|
|
|
if (min < 0 && max > 0) {
|
|
vector_clipf_c_opposite_sign(dst, src, min, max, len);
|
|
} else {
|
|
for (i = 0; i < len; i += 8) {
|
|
dst[i] = av_clipf(src[i], min, max);
|
|
dst[i + 1] = av_clipf(src[i + 1], min, max);
|
|
dst[i + 2] = av_clipf(src[i + 2], min, max);
|
|
dst[i + 3] = av_clipf(src[i + 3], min, max);
|
|
dst[i + 4] = av_clipf(src[i + 4], min, max);
|
|
dst[i + 5] = av_clipf(src[i + 5], min, max);
|
|
dst[i + 6] = av_clipf(src[i + 6], min, max);
|
|
dst[i + 7] = av_clipf(src[i + 7], min, max);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int32_t scalarproduct_int16_c(const int16_t *v1, const int16_t *v2,
|
|
int order)
|
|
{
|
|
unsigned res = 0;
|
|
|
|
while (order--)
|
|
res += *v1++ **v2++;
|
|
|
|
return res;
|
|
}
|
|
|
|
static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min,
|
|
int32_t max, unsigned int len)
|
|
{
|
|
do {
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
*dst++ = av_clip(*src++, min, max);
|
|
len -= 8;
|
|
} while (len > 0);
|
|
}
|
|
|
|
av_cold void ff_audiodsp_init(AudioDSPContext *c)
|
|
{
|
|
c->scalarproduct_int16 = scalarproduct_int16_c;
|
|
c->vector_clip_int32 = vector_clip_int32_c;
|
|
c->vector_clipf = vector_clipf_c;
|
|
|
|
#if ARCH_ARM
|
|
ff_audiodsp_init_arm(c);
|
|
#elif ARCH_PPC
|
|
ff_audiodsp_init_ppc(c);
|
|
#elif ARCH_RISCV
|
|
ff_audiodsp_init_riscv(c);
|
|
#elif ARCH_X86
|
|
ff_audiodsp_init_x86(c);
|
|
#endif
|
|
}
|