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ffmpeg/libavcodec/imgconvert.c

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/*
* Misc image convertion routines
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* @file imgconvert.c
* Misc image convertion routines.
*/
/* TODO:
* - write 'ffimg' program to test all the image related stuff
* - move all api to slice based system
* - integrate deinterlacing, postprocessing and scaling in the conversion process
*/
#include "avcodec.h"
#include "dsputil.h"
#ifdef USE_FASTMEMCPY
#include "fastmemcpy.h"
#endif
#ifdef HAVE_MMX
#include "i386/mmx.h"
#endif
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define FF_COLOR_RGB 0 /* RGB color space */
#define FF_COLOR_GRAY 1 /* gray color space */
#define FF_COLOR_YUV 2 /* YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
#define FF_COLOR_YUV_JPEG 3 /* YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
#define FF_PIXEL_PLANAR 0 /* each channel has one component in AVPicture */
#define FF_PIXEL_PACKED 1 /* only one components containing all the channels */
#define FF_PIXEL_PALETTE 2 /* one components containing indexes for a palette */
typedef struct PixFmtInfo {
const char *name;
uint8_t nb_channels; /* number of channels (including alpha) */
uint8_t color_type; /* color type (see FF_COLOR_xxx constants) */
uint8_t pixel_type; /* pixel storage type (see FF_PIXEL_xxx constants) */
uint8_t is_alpha : 1; /* true if alpha can be specified */
uint8_t x_chroma_shift; /* X chroma subsampling factor is 2 ^ shift */
uint8_t y_chroma_shift; /* Y chroma subsampling factor is 2 ^ shift */
uint8_t depth; /* bit depth of the color components */
} PixFmtInfo;
/* this table gives more information about formats */
static PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
/* YUV formats */
[PIX_FMT_YUV420P] = {
.name = "yuv420p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 1,
},
[PIX_FMT_YUV422P] = {
.name = "yuv422p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 0,
},
[PIX_FMT_YUV444P] = {
.name = "yuv444p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
[PIX_FMT_YUV422] = {
.name = "yuv422",
.nb_channels = 1,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 0,
},
[PIX_FMT_YUV410P] = {
.name = "yuv410p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 2, .y_chroma_shift = 2,
},
[PIX_FMT_YUV411P] = {
.name = "yuv411p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 2, .y_chroma_shift = 0,
},
/* JPEG YUV */
[PIX_FMT_YUVJ420P] = {
.name = "yuvj420p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 1,
},
[PIX_FMT_YUVJ422P] = {
.name = "yuvj422p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 1, .y_chroma_shift = 0,
},
[PIX_FMT_YUVJ444P] = {
.name = "yuvj444p",
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
/* RGB formats */
[PIX_FMT_RGB24] = {
.name = "rgb24",
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
[PIX_FMT_BGR24] = {
.name = "bgr24",
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
[PIX_FMT_RGBA32] = {
.name = "rgba32",
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
[PIX_FMT_RGB565] = {
.name = "rgb565",
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
[PIX_FMT_RGB555] = {
.name = "rgb555",
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
.x_chroma_shift = 0, .y_chroma_shift = 0,
},
/* gray / mono formats */
[PIX_FMT_GRAY8] = {
.name = "gray",
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_MONOWHITE] = {
.name = "monow",
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 1,
},
[PIX_FMT_MONOBLACK] = {
.name = "monob",
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 1,
},
/* paletted formats */
[PIX_FMT_PAL8] = {
.name = "pal8",
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PALETTE,
.depth = 8,
},
};
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift)
{
*h_shift = pix_fmt_info[pix_fmt].x_chroma_shift;
*v_shift = pix_fmt_info[pix_fmt].y_chroma_shift;
}
const char *avcodec_get_pix_fmt_name(int pix_fmt)
{
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
return "???";
else
return pix_fmt_info[pix_fmt].name;
}
enum PixelFormat avcodec_get_pix_fmt(const char* name)
{
int i;
for (i=0; i < PIX_FMT_NB; i++)
if (!strcmp(pix_fmt_info[i].name, name))
break;
return i;
}
/* Picture field are filled with 'ptr' addresses. Also return size */
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
int pix_fmt, int width, int height)
{
int size, w2, h2, size2;
PixFmtInfo *pinfo;
pinfo = &pix_fmt_info[pix_fmt];
size = width * height;
switch(pix_fmt) {
case PIX_FMT_YUV420P:
case PIX_FMT_YUV422P:
case PIX_FMT_YUV444P:
case PIX_FMT_YUV410P:
case PIX_FMT_YUV411P:
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUVJ444P:
w2 = (width + (1 << pinfo->x_chroma_shift) - 1) >> pinfo->x_chroma_shift;
h2 = (height + (1 << pinfo->y_chroma_shift) - 1) >> pinfo->y_chroma_shift;
size2 = w2 * h2;
picture->data[0] = ptr;
picture->data[1] = picture->data[0] + size;
picture->data[2] = picture->data[1] + size2;
picture->linesize[0] = width;
picture->linesize[1] = w2;
picture->linesize[2] = w2;
return size + 2 * size2;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 3;
return size * 3;
case PIX_FMT_RGBA32:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 4;
return size * 4;
case PIX_FMT_RGB555:
case PIX_FMT_RGB565:
case PIX_FMT_YUV422:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 2;
return size * 2;
case PIX_FMT_GRAY8:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width;
return size;
case PIX_FMT_MONOWHITE:
case PIX_FMT_MONOBLACK:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = (width + 7) >> 3;
return picture->linesize[0] * height;
case PIX_FMT_PAL8:
size2 = (size + 3) & ~3;
picture->data[0] = ptr;
picture->data[1] = ptr + size2; /* palette is stored here as 256 32 bit words */
picture->data[2] = NULL;
picture->linesize[0] = width;
picture->linesize[1] = 4;
return size2 + 256 * 4;
default:
picture->data[0] = NULL;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->data[3] = NULL;
return -1;
}
}
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
unsigned char *dest, int dest_size)
{
PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
int i, j, w, h, data_planes;
const unsigned char* s;
int size = avpicture_get_size(pix_fmt, width, height);
if (size > dest_size)
return -1;
if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
if (pix_fmt == PIX_FMT_YUV422 || pix_fmt == PIX_FMT_RGB565 ||
pix_fmt == PIX_FMT_RGB555)
w = width * 2;
else if (pix_fmt == PIX_FMT_PAL8)
w = width;
else
w = width * (pf->depth * pf->nb_channels / 8);
data_planes = 1;
h = height;
} else {
data_planes = pf->nb_channels;
w = width;
h = height;
}
for (i=0; i<data_planes; i++) {
if (i == 1) {
w = width >> pf->x_chroma_shift;
h = height >> pf->y_chroma_shift;
}
s = src->data[i];
for(j=0; j<h; j++) {
memcpy(dest, s, w);
dest += w;
s += src->linesize[i];
}
}
if (pf->pixel_type == FF_PIXEL_PALETTE)
memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
return size;
}
int avpicture_get_size(int pix_fmt, int width, int height)
{
AVPicture dummy_pict;
return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
}
/**
* compute the loss when converting from a pixel format to another
*/
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
int has_alpha)
{
const PixFmtInfo *pf, *ps;
int loss;
ps = &pix_fmt_info[src_pix_fmt];
pf = &pix_fmt_info[dst_pix_fmt];
/* compute loss */
loss = 0;
pf = &pix_fmt_info[dst_pix_fmt];
if (pf->depth < ps->depth ||
(dst_pix_fmt == PIX_FMT_RGB555 && src_pix_fmt == PIX_FMT_RGB565))
loss |= FF_LOSS_DEPTH;
if (pf->x_chroma_shift > ps->x_chroma_shift ||
pf->y_chroma_shift > ps->y_chroma_shift)
loss |= FF_LOSS_RESOLUTION;
switch(pf->color_type) {
case FF_COLOR_RGB:
if (ps->color_type != FF_COLOR_RGB &&
ps->color_type != FF_COLOR_GRAY)
loss |= FF_LOSS_COLORSPACE;
break;
case FF_COLOR_GRAY:
if (ps->color_type != FF_COLOR_GRAY)
loss |= FF_LOSS_COLORSPACE;
break;
case FF_COLOR_YUV:
if (ps->color_type != FF_COLOR_YUV)
loss |= FF_LOSS_COLORSPACE;
break;
case FF_COLOR_YUV_JPEG:
if (ps->color_type != FF_COLOR_YUV_JPEG &&
ps->color_type != FF_COLOR_YUV &&
ps->color_type != FF_COLOR_GRAY)
loss |= FF_LOSS_COLORSPACE;
break;
default:
/* fail safe test */
if (ps->color_type != pf->color_type)
loss |= FF_LOSS_COLORSPACE;
break;
}
if (pf->color_type == FF_COLOR_GRAY &&
ps->color_type != FF_COLOR_GRAY)
loss |= FF_LOSS_CHROMA;
if (!pf->is_alpha && (ps->is_alpha && has_alpha))
loss |= FF_LOSS_ALPHA;
if (pf->pixel_type == FF_PIXEL_PALETTE &&
(ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
loss |= FF_LOSS_COLORQUANT;
return loss;
}
static int avg_bits_per_pixel(int pix_fmt)
{
int bits;
const PixFmtInfo *pf;
pf = &pix_fmt_info[pix_fmt];
switch(pf->pixel_type) {
case FF_PIXEL_PACKED:
switch(pix_fmt) {
case PIX_FMT_YUV422:
case PIX_FMT_RGB565:
case PIX_FMT_RGB555:
bits = 16;
break;
default:
bits = pf->depth * pf->nb_channels;
break;
}
break;
case FF_PIXEL_PLANAR:
if (pf->x_chroma_shift == 0 && pf->y_chroma_shift == 0) {
bits = pf->depth * pf->nb_channels;
} else {
bits = pf->depth + ((2 * pf->depth) >>
(pf->x_chroma_shift + pf->y_chroma_shift));
}
break;
case FF_PIXEL_PALETTE:
bits = 8;
break;
default:
bits = -1;
break;
}
return bits;
}
static int avcodec_find_best_pix_fmt1(int pix_fmt_mask,
int src_pix_fmt,
int has_alpha,
int loss_mask)
{
int dist, i, loss, min_dist, dst_pix_fmt;
/* find exact color match with smallest size */
dst_pix_fmt = -1;
min_dist = 0x7fffffff;
for(i = 0;i < PIX_FMT_NB; i++) {
if (pix_fmt_mask & (1 << i)) {
loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
if (loss == 0) {
dist = avg_bits_per_pixel(i);
if (dist < min_dist) {
min_dist = dist;
dst_pix_fmt = i;
}
}
}
}
return dst_pix_fmt;
}
/**
* find best pixel format to convert to. Return -1 if none found
*/
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
int has_alpha, int *loss_ptr)
{
int dst_pix_fmt, loss_mask, i;
static const int loss_mask_order[] = {
~0, /* no loss first */
~FF_LOSS_ALPHA,
~FF_LOSS_RESOLUTION,
~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
~FF_LOSS_COLORQUANT,
~FF_LOSS_DEPTH,
0,
};
/* try with successive loss */
i = 0;
for(;;) {
loss_mask = loss_mask_order[i++];
dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
has_alpha, loss_mask);
if (dst_pix_fmt >= 0)
goto found;
if (loss_mask == 0)
break;
}
return -1;
found:
if (loss_ptr)
*loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
return dst_pix_fmt;
}
static void img_copy_plane(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
for(;height > 0; height--) {
memcpy(dst, src, width);
dst += dst_wrap;
src += src_wrap;
}
}
/**
* Copy image 'src' to 'dst'.
*/
void img_copy(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height)
{
int bwidth, bits, i;
PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
pf = &pix_fmt_info[pix_fmt];
switch(pf->pixel_type) {
case FF_PIXEL_PACKED:
switch(pix_fmt) {
case PIX_FMT_YUV422:
case PIX_FMT_RGB565:
case PIX_FMT_RGB555:
bits = 16;
break;
default:
bits = pf->depth * pf->nb_channels;
break;
}
bwidth = (width * bits + 7) >> 3;
img_copy_plane(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
bwidth, height);
break;
case FF_PIXEL_PLANAR:
for(i = 0; i < pf->nb_channels; i++) {
int w, h;
w = width;
h = height;
if (i == 1 || i == 2) {
w >>= pf->x_chroma_shift;
h >>= pf->y_chroma_shift;
}
bwidth = (w * pf->depth + 7) >> 3;
img_copy_plane(dst->data[i], dst->linesize[i],
src->data[i], src->linesize[i],
bwidth, h);
}
break;
case FF_PIXEL_PALETTE:
img_copy_plane(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
width, height);
/* copy the palette */
img_copy_plane(dst->data[1], dst->linesize[1],
src->data[1], src->linesize[1],
4, 256);
break;
}
}
/* XXX: totally non optimized */
static void yuv422_to_yuv420p(AVPicture *dst, const AVPicture *src,
int width, int height)
{
const uint8_t *p, *p1;
uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;
int w;
p1 = src->data[0];
lum1 = dst->data[0];
cb1 = dst->data[1];
cr1 = dst->data[2];
for(;height >= 1; height -= 2) {
p = p1;
lum = lum1;
cb = cb1;
cr = cr1;
for(w = width; w >= 2; w -= 2) {
lum[0] = p[0];
cb[0] = p[1];
lum[1] = p[2];
cr[0] = p[3];
p += 4;
lum += 2;
cb++;
cr++;
}
if (w) {
lum[0] = p[0];
cb[0] = p[1];
cr[0] = p[3];
cb++;
cr++;
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
if (height>1) {
p = p1;
lum = lum1;
for(w = width; w >= 2; w -= 2) {
lum[0] = p[0];
lum[1] = p[2];
p += 4;
lum += 2;
}
if (w) {
lum[0] = p[0];
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
}
cb1 += dst->linesize[1];
cr1 += dst->linesize[2];
}
}
static void yuv422_to_yuv422p(AVPicture *dst, const AVPicture *src,
int width, int height)
{
const uint8_t *p, *p1;
uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;
int w;
p1 = src->data[0];
lum1 = dst->data[0];
cb1 = dst->data[1];
cr1 = dst->data[2];
for(;height > 0; height--) {
p = p1;
lum = lum1;
cb = cb1;
cr = cr1;
for(w = width; w >= 2; w -= 2) {
lum[0] = p[0];
cb[0] = p[1];
lum[1] = p[2];
cr[0] = p[3];
p += 4;
lum += 2;
cb++;
cr++;
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
cb1 += dst->linesize[1];
cr1 += dst->linesize[2];
}
}
static void yuv422p_to_yuv422(AVPicture *dst, const AVPicture *src,
int width, int height)
{
uint8_t *p, *p1;
const uint8_t *lum, *cr, *cb, *lum1, *cr1, *cb1;
int w;
p1 = dst->data[0];
lum1 = src->data[0];
cb1 = src->data[1];
cr1 = src->data[2];
for(;height > 0; height--) {
p = p1;
lum = lum1;
cb = cb1;
cr = cr1;
for(w = width; w >= 2; w -= 2) {
p[0] = lum[0];
p[1] = cb[0];
p[2] = lum[1];
p[3] = cr[0];
p += 4;
lum += 2;
cb++;
cr++;
}
p1 += dst->linesize[0];
lum1 += src->linesize[0];
cb1 += src->linesize[1];
cr1 += src->linesize[2];
}
}
#define SCALEBITS 10
#define ONE_HALF (1 << (SCALEBITS - 1))
#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
#define YUV_TO_RGB1_CCIR(cb1, cr1)\
{\
cb = (cb1) - 128;\
cr = (cr1) - 128;\
r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
ONE_HALF;\
b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
}
#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
{\
y = ((y1) - 16) * FIX(255.0/219.0);\
r = cm[(y + r_add) >> SCALEBITS];\
g = cm[(y + g_add) >> SCALEBITS];\
b = cm[(y + b_add) >> SCALEBITS];\
}
#define YUV_TO_RGB1(cb1, cr1)\
{\
cb = (cb1) - 128;\
cr = (cr1) - 128;\
r_add = FIX(1.40200) * cr + ONE_HALF;\
g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\
b_add = FIX(1.77200) * cb + ONE_HALF;\
}
#define YUV_TO_RGB2(r, g, b, y1)\
{\
y = (y1) << SCALEBITS;\
r = cm[(y + r_add) >> SCALEBITS];\
g = cm[(y + g_add) >> SCALEBITS];\
b = cm[(y + b_add) >> SCALEBITS];\
}
#define Y_CCIR_TO_JPEG(y)\
cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS]
#define Y_JPEG_TO_CCIR(y)\
(((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
#define C_CCIR_TO_JPEG(y)\
cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS]
/* NOTE: the clamp is really necessary! */
static inline int C_JPEG_TO_CCIR(int y) {
y = (((y - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS);
if (y < 16)
y = 16;
return y;
}
#define RGB_TO_Y(r, g, b) \
((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \
FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)
#define RGB_TO_U(r1, g1, b1, shift)\
(((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + \
FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
#define RGB_TO_V(r1, g1, b1, shift)\
(((FIX(0.50000) * r1 - FIX(0.41869) * g1 - \
FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
#define RGB_TO_Y_CCIR(r, g, b) \
((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \
FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
#define RGB_TO_U_CCIR(r1, g1, b1, shift)\
(((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \
FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
#define RGB_TO_V_CCIR(r1, g1, b1, shift)\
(((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \
FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
static uint8_t y_ccir_to_jpeg[256];
static uint8_t y_jpeg_to_ccir[256];
static uint8_t c_ccir_to_jpeg[256];
static uint8_t c_jpeg_to_ccir[256];
/* init various conversion tables */
static void img_convert_init(void)
{
int i;
uint8_t *cm = cropTbl + MAX_NEG_CROP;
for(i = 0;i < 256; i++) {
y_ccir_to_jpeg[i] = Y_CCIR_TO_JPEG(i);
y_jpeg_to_ccir[i] = Y_JPEG_TO_CCIR(i);
c_ccir_to_jpeg[i] = C_CCIR_TO_JPEG(i);
c_jpeg_to_ccir[i] = C_JPEG_TO_CCIR(i);
}
}
/* apply to each pixel the given table */
static void img_apply_table(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height, const uint8_t *table1)
{
int n;
const uint8_t *s;
uint8_t *d;
const uint8_t *table;
table = table1;
for(;height > 0; height--) {
s = src;
d = dst;
n = width;
while (n >= 4) {
d[0] = table[s[0]];
d[1] = table[s[1]];
d[2] = table[s[2]];
d[3] = table[s[3]];
d += 4;
s += 4;
n -= 4;
}
while (n > 0) {
d[0] = table[s[0]];
d++;
s++;
n--;
}
dst += dst_wrap;
src += src_wrap;
}
}
/* XXX: use generic filter ? */
/* XXX: in most cases, the sampling position is incorrect */
/* 4x1 -> 1x1 */
static void shrink41(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
const uint8_t *s;
uint8_t *d;
for(;height > 0; height--) {
s = src;
d = dst;
for(w = width;w > 0; w--) {
d[0] = (s[0] + s[1] + s[2] + s[3] + 2) >> 2;
s += 4;
d++;
}
src += src_wrap;
dst += dst_wrap;
}
}
/* 2x1 -> 1x1 */
static void shrink21(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
const uint8_t *s;
uint8_t *d;
for(;height > 0; height--) {
s = src;
d = dst;
for(w = width;w > 0; w--) {
d[0] = (s[0] + s[1]) >> 1;
s += 2;
d++;
}
src += src_wrap;
dst += dst_wrap;
}
}
/* 1x2 -> 1x1 */
static void shrink12(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
uint8_t *d;
const uint8_t *s1, *s2;
for(;height > 0; height--) {
s1 = src;
s2 = s1 + src_wrap;
d = dst;
for(w = width;w >= 4; w-=4) {
d[0] = (s1[0] + s2[0]) >> 1;
d[1] = (s1[1] + s2[1]) >> 1;
d[2] = (s1[2] + s2[2]) >> 1;
d[3] = (s1[3] + s2[3]) >> 1;
s1 += 4;
s2 += 4;
d += 4;
}
for(;w > 0; w--) {
d[0] = (s1[0] + s2[0]) >> 1;
s1++;
s2++;
d++;
}
src += 2 * src_wrap;
dst += dst_wrap;
}
}
/* 2x2 -> 1x1 */
static void shrink22(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
const uint8_t *s1, *s2;
uint8_t *d;
for(;height > 0; height--) {
s1 = src;
s2 = s1 + src_wrap;
d = dst;
for(w = width;w >= 4; w-=4) {
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
s1 += 8;
s2 += 8;
d += 4;
}
for(;w > 0; w--) {
d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
s1 += 2;
s2 += 2;
d++;
}
src += 2 * src_wrap;
dst += dst_wrap;
}
}
/* 4x4 -> 1x1 */
static void shrink44(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w;
const uint8_t *s1, *s2, *s3, *s4;
uint8_t *d;
for(;height > 0; height--) {
s1 = src;
s2 = s1 + src_wrap;
s3 = s2 + src_wrap;
s4 = s3 + src_wrap;
d = dst;
for(w = width;w > 0; w--) {
d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
s2[0] + s2[1] + s2[2] + s2[3] +
s3[0] + s3[1] + s3[2] + s3[3] +
s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
s1 += 4;
s2 += 4;
s3 += 4;
s4 += 4;
d++;
}
src += 4 * src_wrap;
dst += dst_wrap;
}
}
static void grow21_line(uint8_t *dst, const uint8_t *src,
int width)
{
int w;
const uint8_t *s1;
uint8_t *d;
s1 = src;
d = dst;
for(w = width;w >= 4; w-=4) {
d[1] = d[0] = s1[0];
d[3] = d[2] = s1[1];
s1 += 2;
d += 4;
}
for(;w >= 2; w -= 2) {
d[1] = d[0] = s1[0];
s1 ++;
d += 2;
}
/* only needed if width is not a multiple of two */
/* XXX: veryfy that */
if (w) {
d[0] = s1[0];
}
}
static void grow41_line(uint8_t *dst, const uint8_t *src,
int width)
{
int w, v;
const uint8_t *s1;
uint8_t *d;
s1 = src;
d = dst;
for(w = width;w >= 4; w-=4) {
v = s1[0];
d[0] = v;
d[1] = v;
d[2] = v;
d[3] = v;
s1 ++;
d += 4;
}
}
/* 1x1 -> 2x1 */
static void grow21(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
for(;height > 0; height--) {
grow21_line(dst, src, width);
src += src_wrap;
dst += dst_wrap;
}
}
/* 1x1 -> 2x2 */
static void grow22(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
for(;height > 0; height--) {
grow21_line(dst, src, width);
if (height%2)
src += src_wrap;
dst += dst_wrap;
}
}
/* 1x1 -> 4x1 */
static void grow41(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
for(;height > 0; height--) {
grow41_line(dst, src, width);
src += src_wrap;
dst += dst_wrap;
}
}
/* 1x1 -> 4x4 */
static void grow44(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
for(;height > 0; height--) {
grow41_line(dst, src, width);
if ((height & 3) == 1)
src += src_wrap;
dst += dst_wrap;
}
}
/* 1x2 -> 2x1 */
static void conv411(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w, c;
const uint8_t *s1, *s2;
uint8_t *d;
width>>=1;
for(;height > 0; height--) {
s1 = src;
s2 = src + src_wrap;
d = dst;
for(w = width;w > 0; w--) {
c = (s1[0] + s2[0]) >> 1;
d[0] = c;
d[1] = c;
s1++;
s2++;
d += 2;
}
src += src_wrap * 2;
dst += dst_wrap;
}
}
/* XXX: add jpeg quantize code */
#define TRANSP_INDEX (6*6*6)
/* this is maybe slow, but allows for extensions */
static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)
{
return ((((r)/47)%6)*6*6+(((g)/47)%6)*6+(((b)/47)%6));
}
static void build_rgb_palette(uint8_t *palette, int has_alpha)
{
uint32_t *pal;
static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };
int i, r, g, b;
pal = (uint32_t *)palette;
i = 0;
for(r = 0; r < 6; r++) {
for(g = 0; g < 6; g++) {
for(b = 0; b < 6; b++) {
pal[i++] = (0xff << 24) | (pal_value[r] << 16) |
(pal_value[g] << 8) | pal_value[b];
}
}
}
if (has_alpha)
pal[i++] = 0;
while (i < 256)
pal[i++] = 0xff000000;
}
/* copy bit n to bits 0 ... n - 1 */
static inline unsigned int bitcopy_n(unsigned int a, int n)
{
int mask;
mask = (1 << n) - 1;
return (a & (0xff & ~mask)) | ((-((a >> n) & 1)) & mask);
}
/* rgb555 handling */
#define RGB_NAME rgb555
#define RGB_IN(r, g, b, s)\
{\
unsigned int v = ((const uint16_t *)(s))[0];\
r = bitcopy_n(v >> (10 - 3), 3);\
g = bitcopy_n(v >> (5 - 3), 3);\
b = bitcopy_n(v << 3, 3);\
}
#define RGBA_IN(r, g, b, a, s)\
{\
unsigned int v = ((const uint16_t *)(s))[0];\
r = bitcopy_n(v >> (10 - 3), 3);\
g = bitcopy_n(v >> (5 - 3), 3);\
b = bitcopy_n(v << 3, 3);\
a = (-(v >> 15)) & 0xff;\
}
#define RGBA_OUT(d, r, g, b, a)\
{\
((uint16_t *)(d))[0] = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3) | \
((a << 8) & 0x8000);\
}
#define BPP 2
#include "imgconvert_template.h"
/* rgb565 handling */
#define RGB_NAME rgb565
#define RGB_IN(r, g, b, s)\
{\
unsigned int v = ((const uint16_t *)(s))[0];\
r = bitcopy_n(v >> (11 - 3), 3);\
g = bitcopy_n(v >> (5 - 2), 2);\
b = bitcopy_n(v << 3, 3);\
}
#define RGB_OUT(d, r, g, b)\
{\
((uint16_t *)(d))[0] = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);\
}
#define BPP 2
#include "imgconvert_template.h"
/* bgr24 handling */
#define RGB_NAME bgr24
#define RGB_IN(r, g, b, s)\
{\
b = (s)[0];\
g = (s)[1];\
r = (s)[2];\
}
#define RGB_OUT(d, r, g, b)\
{\
(d)[0] = b;\
(d)[1] = g;\
(d)[2] = r;\
}
#define BPP 3
#include "imgconvert_template.h"
#undef RGB_IN
#undef RGB_OUT
#undef BPP
/* rgb24 handling */
#define RGB_NAME rgb24
#define FMT_RGB24
#define RGB_IN(r, g, b, s)\
{\
r = (s)[0];\
g = (s)[1];\
b = (s)[2];\
}
#define RGB_OUT(d, r, g, b)\
{\
(d)[0] = r;\
(d)[1] = g;\
(d)[2] = b;\
}
#define BPP 3
#include "imgconvert_template.h"
/* rgba32 handling */
#define RGB_NAME rgba32
#define FMT_RGBA32
#define RGB_IN(r, g, b, s)\
{\
unsigned int v = ((const uint32_t *)(s))[0];\
r = (v >> 16) & 0xff;\
g = (v >> 8) & 0xff;\
b = v & 0xff;\
}
#define RGBA_IN(r, g, b, a, s)\
{\
unsigned int v = ((const uint32_t *)(s))[0];\
a = (v >> 24) & 0xff;\
r = (v >> 16) & 0xff;\
g = (v >> 8) & 0xff;\
b = v & 0xff;\
}
#define RGBA_OUT(d, r, g, b, a)\
{\
((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;\
}
#define BPP 4
#include "imgconvert_template.h"
static void mono_to_gray(AVPicture *dst, const AVPicture *src,
int width, int height, int xor_mask)
{
const unsigned char *p;
unsigned char *q;
int v, dst_wrap, src_wrap;
int y, w;
p = src->data[0];
src_wrap = src->linesize[0] - ((width + 7) >> 3);
q = dst->data[0];
dst_wrap = dst->linesize[0] - width;
for(y=0;y<height;y++) {
w = width;
while (w >= 8) {
v = *p++ ^ xor_mask;
q[0] = -(v >> 7);
q[1] = -((v >> 6) & 1);
q[2] = -((v >> 5) & 1);
q[3] = -((v >> 4) & 1);
q[4] = -((v >> 3) & 1);
q[5] = -((v >> 2) & 1);
q[6] = -((v >> 1) & 1);
q[7] = -((v >> 0) & 1);
w -= 8;
q += 8;
}
if (w > 0) {
v = *p++ ^ xor_mask;
do {
q[0] = -((v >> 7) & 1);
q++;
v <<= 1;
} while (--w);
}
p += src_wrap;
q += dst_wrap;
}
}
static void monowhite_to_gray(AVPicture *dst, const AVPicture *src,
int width, int height)
{
mono_to_gray(dst, src, width, height, 0xff);
}
static void monoblack_to_gray(AVPicture *dst, const AVPicture *src,
int width, int height)
{
mono_to_gray(dst, src, width, height, 0x00);
}
static void gray_to_mono(AVPicture *dst, const AVPicture *src,
int width, int height, int xor_mask)
{
int n;
const uint8_t *s;
uint8_t *d;
int j, b, v, n1, src_wrap, dst_wrap, y;
s = src->data[0];
src_wrap = src->linesize[0] - width;
d = dst->data[0];
dst_wrap = dst->linesize[0] - ((width + 7) >> 3);
for(y=0;y<height;y++) {
n = width;
while (n >= 8) {
v = 0;
for(j=0;j<8;j++) {
b = s[0];
s++;
v = (v << 1) | (b >> 7);
}
d[0] = v ^ xor_mask;
d++;
n -= 8;
}
if (n > 0) {
n1 = n;
v = 0;
while (n > 0) {
b = s[0];
s++;
v = (v << 1) | (b >> 7);
n--;
}
d[0] = (v << (8 - (n1 & 7))) ^ xor_mask;
d++;
}
s += src_wrap;
d += dst_wrap;
}
}
static void gray_to_monowhite(AVPicture *dst, const AVPicture *src,
int width, int height)
{
gray_to_mono(dst, src, width, height, 0xff);
}
static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,
int width, int height)
{
gray_to_mono(dst, src, width, height, 0x00);
}
typedef struct ConvertEntry {
void (*convert)(AVPicture *dst,
const AVPicture *src, int width, int height);
} ConvertEntry;
/* Add each new convertion function in this table. In order to be able
to convert from any format to any format, the following constraints
must be satisfied:
- all FF_COLOR_RGB formats must convert to and from PIX_FMT_RGB24
- all FF_COLOR_GRAY formats must convert to and from PIX_FMT_GRAY8
- all FF_COLOR_RGB formats with alpha must convert to and from PIX_FMT_RGBA32
- PIX_FMT_YUV444P and PIX_FMT_YUVJ444P must convert to and from
PIX_FMT_RGB24.
- PIX_FMT_422 must convert to and from PIX_FMT_422P.
The other conversion functions are just optimisations for common cases.
*/
static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
[PIX_FMT_YUV420P] = {
[PIX_FMT_RGB555] = {
.convert = yuv420p_to_rgb555
},
[PIX_FMT_RGB565] = {
.convert = yuv420p_to_rgb565
},
[PIX_FMT_BGR24] = {
.convert = yuv420p_to_bgr24
},
[PIX_FMT_RGB24] = {
.convert = yuv420p_to_rgb24
},
[PIX_FMT_RGBA32] = {
.convert = yuv420p_to_rgba32
},
},
[PIX_FMT_YUV422P] = {
[PIX_FMT_YUV422] = {
.convert = yuv422p_to_yuv422,
},
},
[PIX_FMT_YUV444P] = {
[PIX_FMT_RGB24] = {
.convert = yuv444p_to_rgb24
},
},
[PIX_FMT_YUVJ420P] = {
[PIX_FMT_RGB555] = {
.convert = yuvj420p_to_rgb555
},
[PIX_FMT_RGB565] = {
.convert = yuvj420p_to_rgb565
},
[PIX_FMT_BGR24] = {
.convert = yuvj420p_to_bgr24
},
[PIX_FMT_RGB24] = {
.convert = yuvj420p_to_rgb24
},
[PIX_FMT_RGBA32] = {
.convert = yuvj420p_to_rgba32
},
},
[PIX_FMT_YUVJ444P] = {
[PIX_FMT_RGB24] = {
.convert = yuvj444p_to_rgb24
},
},
[PIX_FMT_YUV422] = {
[PIX_FMT_YUV420P] = {
.convert = yuv422_to_yuv420p,
},
[PIX_FMT_YUV422P] = {
.convert = yuv422_to_yuv422p,
},
},
[PIX_FMT_RGB24] = {
[PIX_FMT_YUV420P] = {
.convert = rgb24_to_yuv420p
},
[PIX_FMT_RGB565] = {
.convert = rgb24_to_rgb565
},
[PIX_FMT_RGB555] = {
.convert = rgb24_to_rgb555
},
[PIX_FMT_RGBA32] = {
.convert = rgb24_to_rgba32
},
[PIX_FMT_BGR24] = {
.convert = rgb24_to_bgr24
},
[PIX_FMT_GRAY8] = {
.convert = rgb24_to_gray
},
[PIX_FMT_PAL8] = {
.convert = rgb24_to_pal8
},
[PIX_FMT_YUV444P] = {
.convert = rgb24_to_yuv444p
},
[PIX_FMT_YUVJ420P] = {
.convert = rgb24_to_yuvj420p
},
[PIX_FMT_YUVJ444P] = {
.convert = rgb24_to_yuvj444p
},
},
[PIX_FMT_RGBA32] = {
[PIX_FMT_RGB24] = {
.convert = rgba32_to_rgb24
},
[PIX_FMT_RGB555] = {
.convert = rgba32_to_rgb555
},
[PIX_FMT_PAL8] = {
.convert = rgba32_to_pal8
},
[PIX_FMT_YUV420P] = {
.convert = rgba32_to_yuv420p
},
[PIX_FMT_GRAY8] = {
.convert = rgba32_to_gray
},
},
[PIX_FMT_BGR24] = {
[PIX_FMT_RGB24] = {
.convert = bgr24_to_rgb24
},
[PIX_FMT_YUV420P] = {
.convert = bgr24_to_yuv420p
},
[PIX_FMT_GRAY8] = {
.convert = bgr24_to_gray
},
},
[PIX_FMT_RGB555] = {
[PIX_FMT_RGB24] = {
.convert = rgb555_to_rgb24
},
[PIX_FMT_RGBA32] = {
.convert = rgb555_to_rgba32
},
[PIX_FMT_YUV420P] = {
.convert = rgb555_to_yuv420p
},
[PIX_FMT_GRAY8] = {
.convert = rgb555_to_gray
},
},
[PIX_FMT_RGB565] = {
[PIX_FMT_RGB24] = {
.convert = rgb565_to_rgb24
},
[PIX_FMT_YUV420P] = {
.convert = rgb565_to_yuv420p
},
[PIX_FMT_GRAY8] = {
.convert = rgb565_to_gray
},
},
[PIX_FMT_GRAY8] = {
[PIX_FMT_RGB555] = {
.convert = gray_to_rgb555
},
[PIX_FMT_RGB565] = {
.convert = gray_to_rgb565
},
[PIX_FMT_RGB24] = {
.convert = gray_to_rgb24
},
[PIX_FMT_BGR24] = {
.convert = gray_to_bgr24
},
[PIX_FMT_RGBA32] = {
.convert = gray_to_rgba32
},
[PIX_FMT_MONOWHITE] = {
.convert = gray_to_monowhite
},
[PIX_FMT_MONOBLACK] = {
.convert = gray_to_monoblack
},
},
[PIX_FMT_MONOWHITE] = {
[PIX_FMT_GRAY8] = {
.convert = monowhite_to_gray
},
},
[PIX_FMT_MONOBLACK] = {
[PIX_FMT_GRAY8] = {
.convert = monoblack_to_gray
},
},
[PIX_FMT_PAL8] = {
[PIX_FMT_RGB555] = {
.convert = pal8_to_rgb555
},
[PIX_FMT_RGB565] = {
.convert = pal8_to_rgb565
},
[PIX_FMT_BGR24] = {
.convert = pal8_to_bgr24
},
[PIX_FMT_RGB24] = {
.convert = pal8_to_rgb24
},
[PIX_FMT_RGBA32] = {
.convert = pal8_to_rgba32
},
},
};
int avpicture_alloc(AVPicture *picture,
int pix_fmt, int width, int height)
{
unsigned int size;
void *ptr;
size = avpicture_get_size(pix_fmt, width, height);
ptr = av_malloc(size);
if (!ptr)
goto fail;
avpicture_fill(picture, ptr, pix_fmt, width, height);
return 0;
fail:
memset(picture, 0, sizeof(AVPicture));
return -1;
}
void avpicture_free(AVPicture *picture)
{
av_free(picture->data[0]);
}
/* return true if yuv planar */
static inline int is_yuv_planar(PixFmtInfo *ps)
{
return (ps->color_type == FF_COLOR_YUV ||
ps->color_type == FF_COLOR_YUV_JPEG) &&
ps->pixel_type == FF_PIXEL_PLANAR;
}
/* XXX: always use linesize. Return -1 if not supported */
int img_convert(AVPicture *dst, int dst_pix_fmt,
const AVPicture *src, int src_pix_fmt,
int src_width, int src_height)
{
static int inited;
int i, ret, dst_width, dst_height, int_pix_fmt;
PixFmtInfo *src_pix, *dst_pix;
ConvertEntry *ce;
AVPicture tmp1, *tmp = &tmp1;
if (src_pix_fmt < 0 || src_pix_fmt >= PIX_FMT_NB ||
dst_pix_fmt < 0 || dst_pix_fmt >= PIX_FMT_NB)
return -1;
if (src_width <= 0 || src_height <= 0)
return 0;
if (!inited) {
inited = 1;
img_convert_init();
}
dst_width = src_width;
dst_height = src_height;
dst_pix = &pix_fmt_info[dst_pix_fmt];
src_pix = &pix_fmt_info[src_pix_fmt];
if (src_pix_fmt == dst_pix_fmt) {
/* no conversion needed: just copy */
img_copy(dst, src, dst_pix_fmt, dst_width, dst_height);
return 0;
}
ce = &convert_table[src_pix_fmt][dst_pix_fmt];
if (ce->convert) {
/* specific convertion routine */
ce->convert(dst, src, dst_width, dst_height);
return 0;
}
/* gray to YUV */
if (is_yuv_planar(dst_pix) &&
src_pix_fmt == PIX_FMT_GRAY8) {
int w, h, y;
uint8_t *d;
if (dst_pix->color_type == FF_COLOR_YUV_JPEG) {
img_copy_plane(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
dst_width, dst_height);
} else {
img_apply_table(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
dst_width, dst_height,
y_jpeg_to_ccir);
}
/* fill U and V with 128 */
w = dst_width;
h = dst_height;
w >>= dst_pix->x_chroma_shift;
h >>= dst_pix->y_chroma_shift;
for(i = 1; i <= 2; i++) {
d = dst->data[i];
for(y = 0; y< h; y++) {
memset(d, 128, w);
d += dst->linesize[i];
}
}
return 0;
}
/* YUV to gray */
if (is_yuv_planar(src_pix) &&
dst_pix_fmt == PIX_FMT_GRAY8) {
if (src_pix->color_type == FF_COLOR_YUV_JPEG) {
img_copy_plane(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
dst_width, dst_height);
} else {
img_apply_table(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
dst_width, dst_height,
y_ccir_to_jpeg);
}
return 0;
}
/* YUV to YUV planar */
if (is_yuv_planar(dst_pix) && is_yuv_planar(src_pix)) {
int x_shift, y_shift, w, h, xy_shift;
void (*resize_func)(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height);
/* compute chroma size of the smallest dimensions */
w = dst_width;
h = dst_height;
if (dst_pix->x_chroma_shift >= src_pix->x_chroma_shift)
w >>= dst_pix->x_chroma_shift;
else
w >>= src_pix->x_chroma_shift;
if (dst_pix->y_chroma_shift >= src_pix->y_chroma_shift)
h >>= dst_pix->y_chroma_shift;
else
h >>= src_pix->y_chroma_shift;
x_shift = (dst_pix->x_chroma_shift - src_pix->x_chroma_shift);
y_shift = (dst_pix->y_chroma_shift - src_pix->y_chroma_shift);
xy_shift = ((x_shift & 0xf) << 4) | (y_shift & 0xf);
/* there must be filters for conversion at least from and to
YUV444 format */
switch(xy_shift) {
case 0x00:
resize_func = img_copy_plane;
break;
case 0x10:
resize_func = shrink21;
break;
case 0x20:
resize_func = shrink41;
break;
case 0x01:
resize_func = shrink12;
break;
case 0x11:
resize_func = shrink22;
break;
case 0x22:
resize_func = shrink44;
break;
case 0xf0:
resize_func = grow21;
break;
case 0xe0:
resize_func = grow41;
break;
case 0xff:
resize_func = grow22;
break;
case 0xee:
resize_func = grow44;
break;
case 0xf1:
resize_func = conv411;
break;
default:
/* currently not handled */
goto no_chroma_filter;
}
img_copy_plane(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
dst_width, dst_height);
for(i = 1;i <= 2; i++)
resize_func(dst->data[i], dst->linesize[i],
src->data[i], src->linesize[i],
dst_width>>dst_pix->x_chroma_shift, dst_height>>dst_pix->y_chroma_shift);
/* if yuv color space conversion is needed, we do it here on
the destination image */
if (dst_pix->color_type != src_pix->color_type) {
const uint8_t *y_table, *c_table;
if (dst_pix->color_type == FF_COLOR_YUV) {
y_table = y_jpeg_to_ccir;
c_table = c_jpeg_to_ccir;
} else {
y_table = y_ccir_to_jpeg;
c_table = c_ccir_to_jpeg;
}
img_apply_table(dst->data[0], dst->linesize[0],
dst->data[0], dst->linesize[0],
dst_width, dst_height,
y_table);
for(i = 1;i <= 2; i++)
img_apply_table(dst->data[i], dst->linesize[i],
dst->data[i], dst->linesize[i],
dst_width>>dst_pix->x_chroma_shift,
dst_height>>dst_pix->y_chroma_shift,
c_table);
}
return 0;
}
no_chroma_filter:
/* try to use an intermediate format */
if (src_pix_fmt == PIX_FMT_YUV422 ||
dst_pix_fmt == PIX_FMT_YUV422) {
/* specific case: convert to YUV422P first */
int_pix_fmt = PIX_FMT_YUV422P;
} else if ((src_pix->color_type == FF_COLOR_GRAY &&
src_pix_fmt != PIX_FMT_GRAY8) ||
(dst_pix->color_type == FF_COLOR_GRAY &&
dst_pix_fmt != PIX_FMT_GRAY8)) {
/* gray8 is the normalized format */
int_pix_fmt = PIX_FMT_GRAY8;
} else if ((is_yuv_planar(src_pix) &&
src_pix_fmt != PIX_FMT_YUV444P &&
src_pix_fmt != PIX_FMT_YUVJ444P)) {
/* yuv444 is the normalized format */
if (src_pix->color_type == FF_COLOR_YUV_JPEG)
int_pix_fmt = PIX_FMT_YUVJ444P;
else
int_pix_fmt = PIX_FMT_YUV444P;
} else if ((is_yuv_planar(dst_pix) &&
dst_pix_fmt != PIX_FMT_YUV444P &&
dst_pix_fmt != PIX_FMT_YUVJ444P)) {
/* yuv444 is the normalized format */
if (dst_pix->color_type == FF_COLOR_YUV_JPEG)
int_pix_fmt = PIX_FMT_YUVJ444P;
else
int_pix_fmt = PIX_FMT_YUV444P;
} else {
/* the two formats are rgb or gray8 or yuv[j]444p */
if (src_pix->is_alpha && dst_pix->is_alpha)
int_pix_fmt = PIX_FMT_RGBA32;
else
int_pix_fmt = PIX_FMT_RGB24;
}
if (avpicture_alloc(tmp, int_pix_fmt, dst_width, dst_height) < 0)
return -1;
ret = -1;
if (img_convert(tmp, int_pix_fmt,
src, src_pix_fmt, src_width, src_height) < 0)
goto fail1;
if (img_convert(dst, dst_pix_fmt,
tmp, int_pix_fmt, dst_width, dst_height) < 0)
goto fail1;
ret = 0;
fail1:
avpicture_free(tmp);
return ret;
}
/* NOTE: we scan all the pixels to have an exact information */
static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
{
const unsigned char *p;
int src_wrap, ret, x, y;
unsigned int a;
uint32_t *palette = (uint32_t *)src->data[1];
p = src->data[0];
src_wrap = src->linesize[0] - width;
ret = 0;
for(y=0;y<height;y++) {
for(x=0;x<width;x++) {
a = palette[p[0]] >> 24;
if (a == 0x00) {
ret |= FF_ALPHA_TRANSP;
} else if (a != 0xff) {
ret |= FF_ALPHA_SEMI_TRANSP;
}
p++;
}
p += src_wrap;
}
return ret;
}
/**
* Tell if an image really has transparent alpha values.
* @return ored mask of FF_ALPHA_xxx constants
*/
int img_get_alpha_info(const AVPicture *src,
int pix_fmt, int width, int height)
{
PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
int ret;
pf = &pix_fmt_info[pix_fmt];
/* no alpha can be represented in format */
if (!pf->is_alpha)
return 0;
switch(pix_fmt) {
case PIX_FMT_RGBA32:
ret = get_alpha_info_rgba32(src, width, height);
break;
case PIX_FMT_RGB555:
ret = get_alpha_info_rgb555(src, width, height);
break;
case PIX_FMT_PAL8:
ret = get_alpha_info_pal8(src, width, height);
break;
default:
/* we do not know, so everything is indicated */
ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
break;
}
return ret;
}
#ifdef HAVE_MMX
#define DEINT_INPLACE_LINE_LUM \
movd_m2r(lum_m4[0],mm0);\
movd_m2r(lum_m3[0],mm1);\
movd_m2r(lum_m2[0],mm2);\
movd_m2r(lum_m1[0],mm3);\
movd_m2r(lum[0],mm4);\
punpcklbw_r2r(mm7,mm0);\
movd_r2m(mm2,lum_m4[0]);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
punpcklbw_r2r(mm7,mm3);\
punpcklbw_r2r(mm7,mm4);\
paddw_r2r(mm3,mm1);\
psllw_i2r(1,mm2);\
paddw_r2r(mm4,mm0);\
psllw_i2r(2,mm1);\
paddw_r2r(mm6,mm2);\
paddw_r2r(mm2,mm1);\
psubusw_r2r(mm0,mm1);\
psrlw_i2r(3,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,lum_m2[0]);
#define DEINT_LINE_LUM \
movd_m2r(lum_m4[0],mm0);\
movd_m2r(lum_m3[0],mm1);\
movd_m2r(lum_m2[0],mm2);\
movd_m2r(lum_m1[0],mm3);\
movd_m2r(lum[0],mm4);\
punpcklbw_r2r(mm7,mm0);\
punpcklbw_r2r(mm7,mm1);\
punpcklbw_r2r(mm7,mm2);\
punpcklbw_r2r(mm7,mm3);\
punpcklbw_r2r(mm7,mm4);\
paddw_r2r(mm3,mm1);\
psllw_i2r(1,mm2);\
paddw_r2r(mm4,mm0);\
psllw_i2r(2,mm1);\
paddw_r2r(mm6,mm2);\
paddw_r2r(mm2,mm1);\
psubusw_r2r(mm0,mm1);\
psrlw_i2r(3,mm1);\
packuswb_r2r(mm7,mm1);\
movd_r2m(mm1,dst[0]);
#endif
/* filter parameters: [-1 4 2 4 -1] // 8 */
static void deinterlace_line(uint8_t *dst,
const uint8_t *lum_m4, const uint8_t *lum_m3,
const uint8_t *lum_m2, const uint8_t *lum_m1,
const uint8_t *lum,
int size)
{
#ifndef HAVE_MMX
uint8_t *cm = cropTbl + MAX_NEG_CROP;
int sum;
for(;size > 0;size--) {
sum = -lum_m4[0];
sum += lum_m3[0] << 2;
sum += lum_m2[0] << 1;
sum += lum_m1[0] << 2;
sum += -lum[0];
dst[0] = cm[(sum + 4) >> 3];
lum_m4++;
lum_m3++;
lum_m2++;
lum_m1++;
lum++;
dst++;
}
#else
{
mmx_t rounder;
rounder.uw[0]=4;
rounder.uw[1]=4;
rounder.uw[2]=4;
rounder.uw[3]=4;
pxor_r2r(mm7,mm7);
movq_m2r(rounder,mm6);
}
for (;size > 3; size-=4) {
DEINT_LINE_LUM
lum_m4+=4;
lum_m3+=4;
lum_m2+=4;
lum_m1+=4;
lum+=4;
dst+=4;
}
#endif
}
static void deinterlace_line_inplace(uint8_t *lum_m4, uint8_t *lum_m3, uint8_t *lum_m2, uint8_t *lum_m1, uint8_t *lum,
int size)
{
#ifndef HAVE_MMX
uint8_t *cm = cropTbl + MAX_NEG_CROP;
int sum;
for(;size > 0;size--) {
sum = -lum_m4[0];
sum += lum_m3[0] << 2;
sum += lum_m2[0] << 1;
lum_m4[0]=lum_m2[0];
sum += lum_m1[0] << 2;
sum += -lum[0];
lum_m2[0] = cm[(sum + 4) >> 3];
lum_m4++;
lum_m3++;
lum_m2++;
lum_m1++;
lum++;
}
#else
{
mmx_t rounder;
rounder.uw[0]=4;
rounder.uw[1]=4;
rounder.uw[2]=4;
rounder.uw[3]=4;
pxor_r2r(mm7,mm7);
movq_m2r(rounder,mm6);
}
for (;size > 3; size-=4) {
DEINT_INPLACE_LINE_LUM
lum_m4+=4;
lum_m3+=4;
lum_m2+=4;
lum_m1+=4;
lum+=4;
}
#endif
}
/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
top field is copied as is, but the bottom field is deinterlaced
against the top field. */
static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
const uint8_t *src1, int src_wrap,
int width, int height)
{
const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
int y;
src_m2 = src1;
src_m1 = src1;
src_0=&src_m1[src_wrap];
src_p1=&src_0[src_wrap];
src_p2=&src_p1[src_wrap];
for(y=0;y<(height-2);y+=2) {
memcpy(dst,src_m1,width);
dst += dst_wrap;
deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
src_m2 = src_0;
src_m1 = src_p1;
src_0 = src_p2;
src_p1 += 2*src_wrap;
src_p2 += 2*src_wrap;
dst += dst_wrap;
}
memcpy(dst,src_m1,width);
dst += dst_wrap;
/* do last line */
deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
}
static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
int width, int height)
{
uint8_t *src_m1, *src_0, *src_p1, *src_p2;
int y;
uint8_t *buf;
buf = (uint8_t*)av_malloc(width);
src_m1 = src1;
memcpy(buf,src_m1,width);
src_0=&src_m1[src_wrap];
src_p1=&src_0[src_wrap];
src_p2=&src_p1[src_wrap];
for(y=0;y<(height-2);y+=2) {
deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
src_m1 = src_p1;
src_0 = src_p2;
src_p1 += 2*src_wrap;
src_p2 += 2*src_wrap;
}
/* do last line */
deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
av_free(buf);
}
/* deinterlace - if not supported return -1 */
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height)
{
int i;
if (pix_fmt != PIX_FMT_YUV420P &&
pix_fmt != PIX_FMT_YUV422P &&
pix_fmt != PIX_FMT_YUV444P &&
pix_fmt != PIX_FMT_YUV411P)
return -1;
if ((width & 3) != 0 || (height & 3) != 0)
return -1;
for(i=0;i<3;i++) {
if (i == 1) {
switch(pix_fmt) {
case PIX_FMT_YUV420P:
width >>= 1;
height >>= 1;
break;
case PIX_FMT_YUV422P:
width >>= 1;
break;
case PIX_FMT_YUV411P:
width >>= 2;
break;
default:
break;
}
}
if (src == dst) {
deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
width, height);
} else {
deinterlace_bottom_field(dst->data[i],dst->linesize[i],
src->data[i], src->linesize[i],
width, height);
}
}
#ifdef HAVE_MMX
emms();
#endif
return 0;
}
#undef FIX
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