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Added support for non native float32, and for float64 (BE/LE) in format.c

This commit is contained in:
Laurent Aimar 2010-02-06 14:36:01 +01:00
parent 420e58dec7
commit c1e7c9f281
1 changed files with 33 additions and 0 deletions
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33
modules/audio_filter/converter/format.c
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@ -345,6 +345,25 @@ static block_t *Fl32toS16(filter_t *filter, block_t *b)
b->i_buffer /= 2;
return b;
}
static block_t *Fl64toS16(filter_t *filter, block_t *b)
{
VLC_UNUSED(filter);
double *src = (double *)b->p_buffer;
int16_t *dst = (int16_t *)src;
for (int i = b->i_buffer / 8; i--;) {
const double v = *src++;
/* Slow version. */
if (v >= 1.0)
*dst++ = 32767;
else if (v < -1.0)
*dst++ = -32768;
else
*dst++ = v * 32768.0;
}
b->i_buffer /= 4;
return b;
}
static block_t *S32toFl32(filter_t *filter, block_t *b)
{
VLC_UNUSED(filter);
@ -464,6 +483,17 @@ static void S24toFl32(block_t *bdst, const block_t *bsrc)
/* */
#define XCHG(type, a, b) \
do { type _tmp = a; a = b; b = _tmp; } while(0)
static void Swap64(block_t *b)
{
uint8_t *data = (uint8_t *)b->p_buffer;
for (size_t i = 0; i < b->i_buffer / 8; i++) {
XCHG(uint8_t, data[0], data[7]);
XCHG(uint8_t, data[1], data[6]);
XCHG(uint8_t, data[2], data[5]);
XCHG(uint8_t, data[3], data[4]);
data += 8;
}
}
static void Swap32(block_t *b)
{
uint8_t *data = (uint8_t *)b->p_buffer;
@ -496,6 +526,7 @@ static const struct {
vlc_fourcc_t dst;
cvt_direct_t convert;
} cvt_directs[] = {
{ VLC_CODEC_FL64, VLC_CODEC_S16N, Fl64toS16 },
{ VLC_CODEC_FI32, VLC_CODEC_FL32, Fi32toFl32 },
{ VLC_CODEC_FI32, VLC_CODEC_S16N, Fi32toS16 },
{ VLC_CODEC_S32N, VLC_CODEC_FL32, S32toFl32 },
@ -540,6 +571,8 @@ static const struct {
vlc_fourcc_t b;
cvt_swap_t convert;
} cvt_swaps[] = {
{ VLC_CODEC_F64L, VLC_CODEC_F64B, Swap64 },
{ VLC_CODEC_F32L, VLC_CODEC_F32B, Swap32 },
{ VLC_CODEC_S32L, VLC_CODEC_S32B, Swap32 },
{ VLC_CODEC_U32L, VLC_CODEC_U32B, Swap32 },
{ VLC_CODEC_S24L, VLC_CODEC_S24B, Swap24 },