static block_t *S16toFl32(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 2);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
int16_t *src = (int16_t *)bsrc->p_buffer;
float *dst = (float *)bdst->p_buffer;
for (size_t i = bsrc->i_buffer / 2; i--;)
#if 0
/* Slow version */
*dst++ = (float)*src++ / 32768.f;
#else
{ /* This is Walken's trick based on IEEE float format. On my PIII
* this takes 16 seconds to perform one billion conversions, instead
* of 19 seconds for the above division. */
union { float f; int32_t i; } u;
u.i = *src++ + 0x43c00000;
*dst++ = u.f - 384.f;
}
#endif
out:
block_Release(bsrc);
VLC_UNUSED(filter);
return bdst;
}
/*****************************************************************************
* SendFrame: send a video frame to the stream output.
*****************************************************************************/
static block_t *SendFrame( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
p_block->i_dts = p_block->i_pts = date_Get( &p_sys->pts );
if( p_sys->b_invert )
{
block_t *out = block_Alloc( p_block->i_buffer );
if( likely(out != NULL) )
{
block_CopyProperties( out, p_block );
const uint8_t *p_src = p_block->p_buffer;
uint8_t *p_pixels = out->p_buffer;
for( unsigned i = 0; i < PICTURE_PLANE_MAX; i++ )
{
unsigned pitch = p_sys->pitches[i];
unsigned lines = p_sys->lines[i];
uint8_t *p_dst = p_pixels + (pitch * lines);
for( unsigned x = 0; x < lines; x++ )
{
p_dst -= p_sys->pitches[i];
memcpy( p_dst, p_src, p_sys->pitches[i] );
p_src += p_sys->pitches[i];
}
}
}
block_Release( p_block );
}
return p_block;
}
/*** from U8 ***/
static block_t *U8toS16(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 2);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
uint8_t *src = (uint8_t *)bsrc->p_buffer;
int16_t *dst = (int16_t *)bdst->p_buffer;
for (size_t i = bsrc->i_buffer; i--;)
*dst++ = ((*src++) - 128) << 8;
out:
block_Release(bsrc);
VLC_UNUSED(filter);
return bdst;
}
static block_t *S32toFl64(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 2);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
int32_t *src = (int32_t*)bsrc->p_buffer;
double *dst = (double *)bdst->p_buffer;
for (size_t i = bsrc->i_buffer / 4; i--;)
*dst++ = (double)(*src++) / 2147483648.;
out:
VLC_UNUSED(filter);
block_Release(bsrc);
return bdst;
}
static block_t *Fl32toFl64(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 2);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
float *src = (float *)bsrc->p_buffer;
double *dst = (double *)bdst->p_buffer;
for (size_t i = bsrc->i_buffer / 4; i--;)
*(dst++) = *(src++);
out:
block_Release(bsrc);
VLC_UNUSED(filter);
return bdst;
}
static block_t *S16toFl64(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 4);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
int16_t *src = (int16_t *)bsrc->p_buffer;
float *dst = (float *)bdst->p_buffer;
for (size_t i = bsrc->i_buffer / 2; i--;)
*dst++ = (double)*src++ / 32768.;
out:
block_Release(bsrc);
VLC_UNUSED(filter);
return bdst;
}
static block_t *S16toS32(filter_t *filter, block_t *bsrc)
{
block_t *bdst = block_Alloc(bsrc->i_buffer * 2);
if (unlikely(bdst == NULL))
goto out;
block_CopyProperties(bdst, bsrc);
int16_t *src = (int16_t *)bsrc->p_buffer;
int32_t *dst = (int32_t *)bdst->p_buffer;
for (int i = bsrc->i_buffer / 2; i--;)
*dst++ = *src++ << 16;
out:
block_Release(bsrc);
VLC_UNUSED(filter);
return bdst;
}
