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Add some dsputil functions useful for AAC decoder

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Originally committed as revision 19955 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-09-22 00:48:41 +00:00
parent 9caab87829
commit 53b572118e
2 changed files with 133 additions and 0 deletions
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83
libavcodec/dsputil.c
View File

@ -4089,6 +4089,80 @@ void ff_vector_fmul_window_c(float *dst, const float *src0, const float *src1, c
}
}
static void vector_fmul_scalar_c(float *dst, const float *src, float mul,
int len)
{
int i;
for (i = 0; i < len; i++)
dst[i] = src[i] * mul;
}
static void vector_fmul_sv_scalar_2_c(float *dst, const float *src,
const float **sv, float mul, int len)
{
int i;
for (i = 0; i < len; i += 2, sv++) {
dst[i ] = src[i ] * sv[0][0] * mul;
dst[i+1] = src[i+1] * sv[0][1] * mul;
}
}
static void vector_fmul_sv_scalar_4_c(float *dst, const float *src,
const float **sv, float mul, int len)
{
int i;
for (i = 0; i < len; i += 4, sv++) {
dst[i ] = src[i ] * sv[0][0] * mul;
dst[i+1] = src[i+1] * sv[0][1] * mul;
dst[i+2] = src[i+2] * sv[0][2] * mul;
dst[i+3] = src[i+3] * sv[0][3] * mul;
}
}
static void sv_fmul_scalar_2_c(float *dst, const float **sv, float mul,
int len)
{
int i;
for (i = 0; i < len; i += 2, sv++) {
dst[i ] = sv[0][0] * mul;
dst[i+1] = sv[0][1] * mul;
}
}
static void sv_fmul_scalar_4_c(float *dst, const float **sv, float mul,
int len)
{
int i;
for (i = 0; i < len; i += 4, sv++) {
dst[i ] = sv[0][0] * mul;
dst[i+1] = sv[0][1] * mul;
dst[i+2] = sv[0][2] * mul;
dst[i+3] = sv[0][3] * mul;
}
}
static void butterflies_float_c(float *restrict v1, float *restrict v2,
int len)
{
int i;
for (i = 0; i < len; i++) {
float t = v1[i] - v2[i];
v1[i] += v2[i];
v2[i] = t;
}
}
static float scalarproduct_float_c(const float *v1, const float *v2, int len)
{
float p = 0.0;
int i;
for (i = 0; i < len; i++)
p += v1[i] * v2[i];
return p;
}
static void int32_to_float_fmul_scalar_c(float *dst, const int *src, float mul, int len){
int i;
for(i=0; i<len; i++)
@ -4722,6 +4796,15 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->add_int16 = add_int16_c;
c->sub_int16 = sub_int16_c;
c->scalarproduct_int16 = scalarproduct_int16_c;
c->scalarproduct_float = scalarproduct_float_c;
c->butterflies_float = butterflies_float_c;
c->vector_fmul_scalar = vector_fmul_scalar_c;
c->vector_fmul_sv_scalar[0] = vector_fmul_sv_scalar_2_c;
c->vector_fmul_sv_scalar[1] = vector_fmul_sv_scalar_4_c;
c->sv_fmul_scalar[0] = sv_fmul_scalar_2_c;
c->sv_fmul_scalar[1] = sv_fmul_scalar_4_c;
c->shrink[0]= ff_img_copy_plane;
c->shrink[1]= ff_shrink22;

50
libavcodec/dsputil.h
View File

@ -397,6 +397,56 @@ typedef struct DSPContext {
/* assume len is a multiple of 8, and arrays are 16-byte aligned */
void (*int32_to_float_fmul_scalar)(float *dst, const int *src, float mul, int len);
void (*vector_clipf)(float *dst /* align 16 */, const float *src /* align 16 */, float min, float max, int len /* align 16 */);
/**
* Multiply a vector of floats by a scalar float. Source and
* destination vectors must overlap exactly or not at all.
* @param dst result vector, 16-byte aligned
* @param src input vector, 16-byte aligned
* @param mul scalar value
* @param len length of vector, multiple of 4
*/
void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
int len);
/**
* Multiply a vector of floats by concatenated short vectors of
* floats and by a scalar float. Source and destination vectors
* must overlap exactly or not at all.
* [0]: short vectors of length 2, 8-byte aligned
* [1]: short vectors of length 4, 16-byte aligned
* @param dst output vector, 16-byte aligned
* @param src input vector, 16-byte aligned
* @param sv array of pointers to short vectors
* @param mul scalar value
* @param len number of elements in src and dst, multiple of 4
*/
void (*vector_fmul_sv_scalar[2])(float *dst, const float *src,
const float **sv, float mul, int len);
/**
* Multiply short vectors of floats by a scalar float, store
* concatenated result.
* [0]: short vectors of length 2, 8-byte aligned
* [1]: short vectors of length 4, 16-byte aligned
* @param dst output vector, 16-byte aligned
* @param sv array of pointers to short vectors
* @param mul scalar value
* @param len number of output elements, multiple of 4
*/
void (*sv_fmul_scalar[2])(float *dst, const float **sv,
float mul, int len);
/**
* Calculate the scalar product of two vectors of floats.
* @param v1 first vector, 16-byte aligned
* @param v2 second vector, 16-byte aligned
* @param len length of vectors, multiple of 4
*/
float (*scalarproduct_float)(const float *v1, const float *v2, int len);
/**
* Calculate the sum and difference of two vectors of floats.
* @param v1 first input vector, sum output, 16-byte aligned
* @param v2 second input vector, difference output, 16-byte aligned
* @param len length of vectors, multiple of 4
*/
void (*butterflies_float)(float *restrict v1, float *restrict v2, int len);
/* C version: convert floats from the range [384.0,386.0] to ints in [-32768,32767]
* simd versions: convert floats from [-32768.0,32767.0] without rescaling and arrays are 16byte aligned */