/*
- * High quality image resampling with polyphase filters
+ * High quality image resampling with polyphase filters
* Copyright (c) 2001 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+
/**
* @file imgresample.c
* High quality image resampling with polyphase filters .
*/
-
+
#include "avcodec.h"
#include "dsputil.h"
/* This function must be optimized */
static void h_resample_fast(uint8_t *dst, int dst_width, const uint8_t *src,
- int src_width, int src_start, int src_incr,
- int16_t *filters)
+ int src_width, int src_start, int src_incr,
+ int16_t *filters)
{
int src_pos, phase, sum, i;
const uint8_t *s;
/* This function must be optimized */
static void v_resample(uint8_t *dst, int dst_width, const uint8_t *src,
- int wrap, int16_t *filter)
+ int wrap, int16_t *filter)
{
int sum, i;
const uint8_t *s;
/* XXX: do four pixels at a time */
static void h_resample_fast4_mmx(uint8_t *dst, int dst_width,
- const uint8_t *src, int src_width,
+ const uint8_t *src, int src_width,
int src_start, int src_incr, int16_t *filters)
{
int src_pos, phase;
const uint8_t *s;
int16_t *filter;
mmx_t tmp;
-
+
src_pos = src_start;
pxor_r2r(mm7, mm7);
}
static void v_resample4_mmx(uint8_t *dst, int dst_width, const uint8_t *src,
- int wrap, int16_t *filter)
+ int wrap, int16_t *filter)
{
int sum, i, v;
const uint8_t *s;
mmx_t tmp;
mmx_t coefs[4];
-
+
for(i=0;i<4;i++) {
v = filter[i];
coefs[i].uw[0] = v;
coefs[i].uw[2] = v;
coefs[i].uw[3] = v;
}
-
+
pxor_r2r(mm7, mm7);
s = src;
while (dst_width >= 4) {
paddw_r2r(mm3, mm2);
paddw_r2r(mm2, mm0);
psraw_i2r(FILTER_BITS, mm0);
-
+
packuswb_r2r(mm7, mm0);
movq_r2m(mm0, tmp);
#endif
#ifdef HAVE_ALTIVEC
-typedef union {
+typedef union {
vector unsigned char v;
unsigned char c[16];
} vec_uc_t;
-typedef union {
+typedef union {
vector signed short v;
signed short s[8];
} vec_ss_t;
void v_resample16_altivec(uint8_t *dst, int dst_width, const uint8_t *src,
- int wrap, int16_t *filter)
+ int wrap, int16_t *filter)
{
int sum, i;
const uint8_t *s;
vector unsigned char *tv, tmp, dstv, zero;
vec_ss_t srchv[4], srclv[4], fv[4];
- vector signed short zeros, sumhv, sumlv;
+ vector signed short zeros, sumhv, sumlv;
s = src;
for(i=0;i<4;i++)
fv[i].s[0] = filter[i] << (15-FILTER_BITS);
fv[i].v = vec_splat(fv[i].v, 0);
}
-
+
zero = vec_splat_u8(0);
zeros = vec_splat_s16(0);
dst_width--;
i--;
}
-
+
/* Do our altivec resampling on 16 pixels at once. */
while(dst_width>=16) {
/*
srclv[3].v = (vector signed short) vec_mergel(zero, tmp);
sumhv = vec_madds(srchv[3].v, fv[3].v, sumhv);
sumlv = vec_madds(srclv[3].v, fv[3].v, sumlv);
-
+
/*
Pack the results into our destination vector,
and do an aligned write of that back to memory.
*/
dstv = vec_packsu(sumhv, sumlv) ;
vec_st(dstv, 0, (vector unsigned char *) dst);
-
+
dst+=16;
s+=16;
dst_width-=16;
/* slow version to handle limit cases. Does not need optimisation */
static void h_resample_slow(uint8_t *dst, int dst_width,
- const uint8_t *src, int src_width,
+ const uint8_t *src, int src_width,
int src_start, int src_incr, int16_t *filters)
{
int src_pos, phase, sum, j, v, i;
}
static void h_resample(uint8_t *dst, int dst_width, const uint8_t *src,
- int src_width, int src_start, int src_incr,
- int16_t *filters)
+ int src_width, int src_start, int src_incr,
+ int16_t *filters)
{
int n, src_end;
}
src_end = src_start + dst_width * src_incr;
if (src_end > ((src_width - NB_TAPS) << POS_FRAC_BITS)) {
- n = (((src_width - NB_TAPS + 1) << POS_FRAC_BITS) - 1 - src_start) /
+ n = (((src_width - NB_TAPS + 1) << POS_FRAC_BITS) - 1 - src_start) /
src_incr;
} else {
n = dst_width;
}
#ifdef HAVE_MMX
if ((mm_flags & MM_MMX) && NB_TAPS == 4)
- h_resample_fast4_mmx(dst, n,
+ h_resample_fast4_mmx(dst, n,
src, src_width, src_start, src_incr, filters);
else
#endif
- h_resample_fast(dst, n,
+ h_resample_fast(dst, n,
src, src_width, src_start, src_incr, filters);
if (n < dst_width) {
dst += n;
dst_width -= n;
src_start += n * src_incr;
- h_resample_slow(dst, dst_width,
+ h_resample_slow(dst, dst_width,
src, src_width, src_start, src_incr, filters);
}
}
-static void component_resample(ImgReSampleContext *s,
+static void component_resample(ImgReSampleContext *s,
uint8_t *output, int owrap, int owidth, int oheight,
uint8_t *input, int iwrap, int iwidth, int iheight)
{
last_src_y = - FCENTER - 1;
/* position of the bottom of the filter in the source image */
- src_y = (last_src_y + NB_TAPS) * POS_FRAC;
+ src_y = (last_src_y + NB_TAPS) * POS_FRAC;
ring_y = NB_TAPS; /* position in ring buffer */
for(y=0;y<oheight;y++) {
/* apply horizontal filter on new lines from input if needed */
src_line = input + y1 * iwrap;
new_line = s->line_buf + ring_y * owidth;
/* apply filter and handle limit cases correctly */
- h_resample(new_line, owidth,
- src_line, iwidth, - FCENTER * POS_FRAC, s->h_incr,
+ h_resample(new_line, owidth,
+ src_line, iwidth, - FCENTER * POS_FRAC, s->h_incr,
&s->h_filters[0][0]);
/* handle ring buffer wraping */
if (ring_y >= LINE_BUF_HEIGHT) {
#ifdef HAVE_MMX
/* desactivated MMX because loss of precision */
if ((mm_flags & MM_MMX) && NB_TAPS == 4 && 0)
- v_resample4_mmx(output, owidth,
- s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
+ v_resample4_mmx(output, owidth,
+ s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
&s->v_filters[phase_y][0]);
else
#endif
&s->v_filters[phase_y][0]);
else
#endif
- v_resample(output, owidth,
- s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
+ v_resample(output, owidth,
+ s->line_buf + (ring_y - NB_TAPS + 1) * owidth, owidth,
&s->v_filters[phase_y][0]);
-
+
src_y += s->v_incr;
-
+
output += owrap;
}
}
ImgReSampleContext *img_resample_init(int owidth, int oheight,
int iwidth, int iheight)
{
- return img_resample_full_init(owidth, oheight, iwidth, iheight,
+ return img_resample_full_init(owidth, oheight, iwidth, iheight,
0, 0, 0, 0, 0, 0, 0, 0);
}
{
ImgReSampleContext *s;
+ if (!owidth || !oheight || !iwidth || !iheight)
+ return NULL;
+
s = av_mallocz(sizeof(ImgReSampleContext));
if (!s)
return NULL;
if((unsigned)owidth >= UINT_MAX / (LINE_BUF_HEIGHT + NB_TAPS))
return NULL;
s->line_buf = av_mallocz(owidth * (LINE_BUF_HEIGHT + NB_TAPS));
- if (!s->line_buf)
+ if (!s->line_buf)
goto fail;
-
+
s->owidth = owidth;
s->oheight = oheight;
s->iwidth = iwidth;
s->iheight = iheight;
-
+
s->topBand = topBand;
s->bottomBand = bottomBand;
s->leftBand = leftBand;
s->rightBand = rightBand;
-
+
s->padtop = padtop;
s->padbottom = padbottom;
s->padleft = padleft;
s->pad_oheight = oheight - (padtop + padbottom);
s->h_incr = ((iwidth - leftBand - rightBand) * POS_FRAC) / s->pad_owidth;
- s->v_incr = ((iheight - topBand - bottomBand) * POS_FRAC) / s->pad_oheight;
+ s->v_incr = ((iheight - topBand - bottomBand) * POS_FRAC) / s->pad_oheight;
- av_build_filter(&s->h_filters[0][0], (float) s->pad_owidth /
+ av_build_filter(&s->h_filters[0][0], (float) s->pad_owidth /
(float) (iwidth - leftBand - rightBand), NB_TAPS, NB_PHASES, 1<<FILTER_BITS, 0);
- av_build_filter(&s->v_filters[0][0], (float) s->pad_oheight /
+ av_build_filter(&s->v_filters[0][0], (float) s->pad_oheight /
(float) (iheight - topBand - bottomBand), NB_TAPS, NB_PHASES, 1<<FILTER_BITS, 0);
return s;
return NULL;
}
-void img_resample(ImgReSampleContext *s,
+void img_resample(ImgReSampleContext *s,
AVPicture *output, const AVPicture *input)
{
int i, shift;
for (i=0;i<3;i++) {
shift = (i == 0) ? 0 : 1;
- optr = output->data[i] + (((output->linesize[i] *
+ optr = output->data[i] + (((output->linesize[i] *
s->padtop) + s->padleft) >> shift);
- component_resample(s, optr, output->linesize[i],
+ component_resample(s, optr, output->linesize[i],
s->pad_owidth >> shift, s->pad_oheight >> shift,
- input->data[i] + (input->linesize[i] *
+ input->data[i] + (input->linesize[i] *
(s->topBand >> shift)) + (s->leftBand >> shift),
- input->linesize[i], ((s->iwidth - s->leftBand -
+ input->linesize[i], ((s->iwidth - s->leftBand -
s->rightBand) >> shift),
(s->iheight - s->topBand - s->bottomBand) >> shift);
}
else
v = 0x00;
} else if (x < XSIZE/4) {
- if (x & 1)
+ if (x & 1)
v = 0xff;
- else
+ else
v = 0;
} else if (y < XSIZE/4) {
- if (y & 1)
+ if (y & 1)
v = 0xff;
- else
+ else
v = 0;
} else {
if (y < YSIZE*3/8) {
- if ((y+x) & 1)
+ if ((y+x) & 1)
v = 0xff;
- else
+ else
v = 0;
} else {
if (((x+3) % 4) <= 1 &&
projects / ffmpeg / blobdiff