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FFmpeg/libavcodec/imgconvert.c
Reinhard Tartler 737eb5976f Merge libavcore into libavutil 
It is pretty hopeless that other considerable projects will adopt
libavutil alone in other projects. Projects that need small footprint
are better off with more specialized libraries such as gnulib or rather
just copy the necessary parts that they need. With this in mind, nobody
is helped by having libavutil and libavcore split. In order to ease
maintenance inside and around FFmpeg and to reduce confusion where to
put common code, avcore's functionality is merged (back) to avutil.

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
2011-02-15 16:18:21 +01:00

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/*
* Misc image conversion routines
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* misc image conversion 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"
#include "internal.h"
#include "imgconvert.h"
#include "libavutil/colorspace.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#if HAVE_MMX && HAVE_YASM
#include "x86/dsputil_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 */
#if HAVE_MMX && HAVE_YASM
#define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
#define deinterlace_line ff_deinterlace_line_mmx
#else
#define deinterlace_line_inplace deinterlace_line_inplace_c
#define deinterlace_line deinterlace_line_c
#endif
typedef struct PixFmtInfo {
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 depth; /**< bit depth of the color components */
} PixFmtInfo;
/* this table gives more information about formats */
static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
/* YUV formats */
[PIX_FMT_YUV420P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUV422P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUV444P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUYV422] = {
.nb_channels = 1,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_UYVY422] = {
.nb_channels = 1,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_YUV410P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUV411P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUV440P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUV420P16LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_YUV422P16LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_YUV444P16LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_YUV420P16BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_YUV422P16BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_YUV444P16BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
/* YUV formats with alpha plane */
[PIX_FMT_YUVA420P] = {
.nb_channels = 4,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
/* JPEG YUV */
[PIX_FMT_YUVJ420P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUVJ422P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUVJ444P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_YUVJ440P] = {
.nb_channels = 3,
.color_type = FF_COLOR_YUV_JPEG,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
/* RGB formats */
[PIX_FMT_RGB24] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_BGR24] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_ARGB] = {
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_RGB48BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 16,
},
[PIX_FMT_RGB48LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 16,
},
[PIX_FMT_RGB565BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_RGB565LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_RGB555BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_RGB555LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_RGB444BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
[PIX_FMT_RGB444LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
/* gray / mono formats */
[PIX_FMT_GRAY16BE] = {
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_GRAY16LE] = {
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 16,
},
[PIX_FMT_GRAY8] = {
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_MONOWHITE] = {
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 1,
},
[PIX_FMT_MONOBLACK] = {
.nb_channels = 1,
.color_type = FF_COLOR_GRAY,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 1,
},
/* paletted formats */
[PIX_FMT_PAL8] = {
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PALETTE,
.depth = 8,
},
[PIX_FMT_UYYVYY411] = {
.nb_channels = 1,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_ABGR] = {
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_BGR565BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_BGR565LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_BGR555BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_BGR555LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 5,
},
[PIX_FMT_BGR444BE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
[PIX_FMT_BGR444LE] = {
.nb_channels = 3,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
[PIX_FMT_RGB8] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_RGB4] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
[PIX_FMT_RGB4_BYTE] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_BGR8] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_BGR4] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 4,
},
[PIX_FMT_BGR4_BYTE] = {
.nb_channels = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_NV12] = {
.nb_channels = 2,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_NV21] = {
.nb_channels = 2,
.color_type = FF_COLOR_YUV,
.pixel_type = FF_PIXEL_PLANAR,
.depth = 8,
},
[PIX_FMT_BGRA] = {
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
[PIX_FMT_RGBA] = {
.nb_channels = 4, .is_alpha = 1,
.color_type = FF_COLOR_RGB,
.pixel_type = FF_PIXEL_PACKED,
.depth = 8,
},
};
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
{
*h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
*v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
}
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
{
if ((unsigned)pix_fmt >= PIX_FMT_NB)
return NULL;
else
return av_pix_fmt_descriptors[pix_fmt].name;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
enum PixelFormat avcodec_get_pix_fmt(const char *name)
{
return av_get_pix_fmt(name);
}
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
{
av_get_pix_fmt_string(buf, buf_size, pix_fmt);
}
#endif
int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
{
return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
return ff_set_systematic_pal2(pal, pix_fmt);
}
int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
{
return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
}
int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
int height)
{
return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
}
#endif
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
enum PixelFormat pix_fmt, int width, int height)
{
int ret;
if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
return ret;
if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
return ret;
return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
}
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
unsigned char *dest, int dest_size)
{
int i, j, nb_planes = 0, linesizes[4];
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
int size = avpicture_get_size(pix_fmt, width, height);
if (size > dest_size || size < 0)
return AVERROR(EINVAL);
for (i = 0; i < desc->nb_components; i++)
nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
nb_planes++;
av_image_fill_linesizes(linesizes, pix_fmt, width);
for (i = 0; i < nb_planes; i++) {
int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
const unsigned char *s = src->data[i];
h = (height + (1 << shift) - 1) >> shift;
for (j = 0; j < h; j++) {
memcpy(dest, s, linesizes[i]);
dest += linesizes[i];
s += src->linesize[i];
}
}
if (desc->flags & PIX_FMT_PAL)
memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
return size;
}
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
{
AVPicture dummy_pict;
if(av_image_check_size(width, height, 0, NULL))
return -1;
switch (pix_fmt) {
case PIX_FMT_RGB8:
case PIX_FMT_BGR8:
case PIX_FMT_RGB4_BYTE:
case PIX_FMT_BGR4_BYTE:
case PIX_FMT_GRAY8:
// do not include palette for these pseudo-paletted formats
return width * height;
}
return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
}
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
int has_alpha)
{
const PixFmtInfo *pf, *ps;
const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
int loss;
ps = &pix_fmt_info[src_pix_fmt];
/* compute loss */
loss = 0;
pf = &pix_fmt_info[dst_pix_fmt];
if (pf->depth < ps->depth ||
((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
(src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
loss |= FF_LOSS_DEPTH;
if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
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(enum PixelFormat pix_fmt)
{
int bits;
const PixFmtInfo *pf;
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
pf = &pix_fmt_info[pix_fmt];
switch(pf->pixel_type) {
case FF_PIXEL_PACKED:
switch(pix_fmt) {
case PIX_FMT_YUYV422:
case PIX_FMT_UYVY422:
case PIX_FMT_RGB565BE:
case PIX_FMT_RGB565LE:
case PIX_FMT_RGB555BE:
case PIX_FMT_RGB555LE:
case PIX_FMT_RGB444BE:
case PIX_FMT_RGB444LE:
case PIX_FMT_BGR565BE:
case PIX_FMT_BGR565LE:
case PIX_FMT_BGR555BE:
case PIX_FMT_BGR555LE:
case PIX_FMT_BGR444BE:
case PIX_FMT_BGR444LE:
bits = 16;
break;
case PIX_FMT_UYYVYY411:
bits = 12;
break;
default:
bits = pf->depth * pf->nb_channels;
break;
}
break;
case FF_PIXEL_PLANAR:
if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
bits = pf->depth * pf->nb_channels;
} else {
bits = pf->depth + ((2 * pf->depth) >>
(desc->log2_chroma_w + desc->log2_chroma_h));
}
break;
case FF_PIXEL_PALETTE:
bits = 8;
break;
default:
bits = -1;
break;
}
return bits;
}
static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
enum PixelFormat src_pix_fmt,
int has_alpha,
int loss_mask)
{
int dist, i, loss, min_dist;
enum PixelFormat dst_pix_fmt;
/* find exact color match with smallest size */
dst_pix_fmt = PIX_FMT_NONE;
min_dist = 0x7fffffff;
for(i = 0;i < PIX_FMT_NB; i++) {
if (pix_fmt_mask & (1ULL << 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;
}
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
int has_alpha, int *loss_ptr)
{
enum PixelFormat dst_pix_fmt;
int 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 PIX_FMT_NONE;
found:
if (loss_ptr)
*loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
return dst_pix_fmt;
}
#if LIBAVCODEC_VERSION_MAJOR < 53
void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
}
int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
{
return av_image_get_linesize(pix_fmt, width, plane);
}
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
uint8_t *src_data[4], int src_linesize[4],
enum PixelFormat pix_fmt, int width, int height)
{
av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
pix_fmt, width, height);
}
#endif
void av_picture_copy(AVPicture *dst, const AVPicture *src,
enum PixelFormat pix_fmt, int width, int height)
{
av_image_copy(dst->data, dst->linesize, src->data,
src->linesize, pix_fmt, width, height);
}
/* 2x2 -> 1x1 */
void ff_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 */
void ff_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;
}
}
/* 8x8 -> 1x1 */
void ff_shrink88(uint8_t *dst, int dst_wrap,
const uint8_t *src, int src_wrap,
int width, int height)
{
int w, i;
for(;height > 0; height--) {
for(w = width;w > 0; w--) {
int tmp=0;
for(i=0; i<8; i++){
tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
src += src_wrap;
}
*(dst++) = (tmp + 32)>>6;
src += 8 - 8*src_wrap;
}
src += 8*src_wrap - 8*width;
dst += dst_wrap - width;
}
}
int avpicture_alloc(AVPicture *picture,
enum PixelFormat pix_fmt, int width, int height)
{
int ret;
if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) {
memset(picture, 0, sizeof(AVPicture));
return ret;
}
return 0;
}
void avpicture_free(AVPicture *picture)
{
av_free(picture->data[0]);
}
/* return true if yuv planar */
static inline int is_yuv_planar(const PixFmtInfo *ps)
{
return (ps->color_type == FF_COLOR_YUV ||
ps->color_type == FF_COLOR_YUV_JPEG) &&
ps->pixel_type == FF_PIXEL_PLANAR;
}
int av_picture_crop(AVPicture *dst, const AVPicture *src,
enum PixelFormat pix_fmt, int top_band, int left_band)
{
int y_shift;
int x_shift;
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
return -1;
y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
dst->linesize[0] = src->linesize[0];
dst->linesize[1] = src->linesize[1];
dst->linesize[2] = src->linesize[2];
return 0;
}
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
int *color)
{
uint8_t *optr;
int y_shift;
int x_shift;
int yheight;
int i, y;
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
!is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
for (i = 0; i < 3; i++) {
x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
if (padtop || padleft) {
memset(dst->data[i], color[i],
dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
}
if (padleft || padright) {
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
(dst->linesize[i] - (padright >> x_shift));
yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
for (y = 0; y < yheight; y++) {
memset(optr, color[i], (padleft + padright) >> x_shift);
optr += dst->linesize[i];
}
}
if (src) { /* first line */
uint8_t *iptr = src->data[i];
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
(padleft >> x_shift);
memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
iptr += src->linesize[i];
optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
(dst->linesize[i] - (padright >> x_shift));
yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
for (y = 0; y < yheight; y++) {
memset(optr, color[i], (padleft + padright) >> x_shift);
memcpy(optr + ((padleft + padright) >> x_shift), iptr,
(width - padleft - padright) >> x_shift);
iptr += src->linesize[i];
optr += dst->linesize[i];
}
}
if (padbottom || padright) {
optr = dst->data[i] + dst->linesize[i] *
((height - padbottom) >> y_shift) - (padright >> x_shift);
memset(optr, color[i],dst->linesize[i] *
(padbottom >> y_shift) + (padright >> x_shift));
}
}
return 0;
}
/* 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;
}
int img_get_alpha_info(const AVPicture *src,
enum PixelFormat pix_fmt, int width, int height)
{
const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
int ret;
/* no alpha can be represented in format */
if (!pf->is_alpha)
return 0;
switch(pix_fmt) {
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;
}
#if !(HAVE_MMX && HAVE_YASM)
/* filter parameters: [-1 4 2 4 -1] // 8 */
static void deinterlace_line_c(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)
{
uint8_t *cm = ff_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++;
}
}
static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
uint8_t *lum_m2, uint8_t *lum_m1,
uint8_t *lum, int size)
{
uint8_t *cm = ff_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++;
}
}
#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);
}
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
enum PixelFormat pix_fmt, int width, int height)
{
int i;
if (pix_fmt != PIX_FMT_YUV420P &&
pix_fmt != PIX_FMT_YUVJ420P &&
pix_fmt != PIX_FMT_YUV422P &&
pix_fmt != PIX_FMT_YUVJ422P &&
pix_fmt != PIX_FMT_YUV444P &&
pix_fmt != PIX_FMT_YUV411P &&
pix_fmt != PIX_FMT_GRAY8)
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_YUVJ420P:
case PIX_FMT_YUV420P:
width >>= 1;
height >>= 1;
break;
case PIX_FMT_YUV422P:
case PIX_FMT_YUVJ422P:
width >>= 1;
break;
case PIX_FMT_YUV411P:
width >>= 2;
break;
default:
break;
}
if (pix_fmt == PIX_FMT_GRAY8) {
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);
}
}
emms_c();
return 0;
}
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