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ffmpeg/libavcodec/snow_dwt.c
Derek Buitenhuis 402a61c919 snow_dwt: Don't try and free members of non-existent arrays 
If allocation fails earlier on, and the next frame is processed,
the slice buffer could be left in a state where line and data_stack
have already been freed, or are otherwise null pointers.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
2014-12-15 21:52:19 -05:00

871 lines
28 KiB
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/*
* Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2008 David Conrad
*
* 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
*/
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "me_cmp.h"
#include "snow_dwt.h"
int ff_slice_buffer_init(slice_buffer *buf, int line_count,
int max_allocated_lines, int line_width,
IDWTELEM *base_buffer)
{
int i;
buf->base_buffer = base_buffer;
buf->line_count = line_count;
buf->line_width = line_width;
buf->data_count = max_allocated_lines;
buf->line = av_mallocz_array(line_count, sizeof(IDWTELEM *));
if (!buf->line)
return AVERROR(ENOMEM);
buf->data_stack = av_malloc_array(max_allocated_lines, sizeof(IDWTELEM *));
if (!buf->data_stack) {
av_freep(&buf->line);
return AVERROR(ENOMEM);
}
for (i = 0; i < max_allocated_lines; i++) {
buf->data_stack[i] = av_malloc_array(line_width, sizeof(IDWTELEM));
if (!buf->data_stack[i]) {
for (i--; i >=0; i--)
av_freep(&buf->data_stack[i]);
av_freep(&buf->data_stack);
av_freep(&buf->line);
return AVERROR(ENOMEM);
}
}
buf->data_stack_top = max_allocated_lines - 1;
return 0;
}
IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line)
{
IDWTELEM *buffer;
av_assert0(buf->data_stack_top >= 0);
// av_assert1(!buf->line[line]);
if (buf->line[line])
return buf->line[line];
buffer = buf->data_stack[buf->data_stack_top];
buf->data_stack_top--;
buf->line[line] = buffer;
return buffer;
}
void ff_slice_buffer_release(slice_buffer *buf, int line)
{
IDWTELEM *buffer;
av_assert1(line >= 0 && line < buf->line_count);
av_assert1(buf->line[line]);
buffer = buf->line[line];
buf->data_stack_top++;
buf->data_stack[buf->data_stack_top] = buffer;
buf->line[line] = NULL;
}
void ff_slice_buffer_flush(slice_buffer *buf)
{
int i;
if (!buf->line)
return;
for (i = 0; i < buf->line_count; i++)
if (buf->line[i])
ff_slice_buffer_release(buf, i);
}
void ff_slice_buffer_destroy(slice_buffer *buf)
{
int i;
ff_slice_buffer_flush(buf);
if (buf->data_stack)
for (i = buf->data_count - 1; i >= 0; i--)
av_freep(&buf->data_stack[i]);
av_freep(&buf->data_stack);
av_freep(&buf->line);
}
static inline int mirror(int v, int m)
{
while ((unsigned)v > (unsigned)m) {
v = -v;
if (v < 0)
v += 2 * m;
}
return v;
}
static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
int dst_step, int src_step, int ref_step,
int width, int mul, int add, int shift,
int highpass, int inverse)
{
const int mirror_left = !highpass;
const int mirror_right = (width & 1) ^ highpass;
const int w = (width >> 1) - 1 + (highpass & width);
int i;
#define LIFT(src, ref, inv) ((src) + ((inv) ? -(ref) : +(ref)))
if (mirror_left) {
dst[0] = LIFT(src[0], ((mul * 2 * ref[0] + add) >> shift), inverse);
dst += dst_step;
src += src_step;
}
for (i = 0; i < w; i++)
dst[i * dst_step] = LIFT(src[i * src_step],
((mul * (ref[i * ref_step] +
ref[(i + 1) * ref_step]) +
add) >> shift),
inverse);
if (mirror_right)
dst[w * dst_step] = LIFT(src[w * src_step],
((mul * 2 * ref[w * ref_step] + add) >> shift),
inverse);
}
static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
int dst_step, int src_step, int ref_step,
int width, int mul, int add, int shift,
int highpass, int inverse)
{
const int mirror_left = !highpass;
const int mirror_right = (width & 1) ^ highpass;
const int w = (width >> 1) - 1 + (highpass & width);
int i;
av_assert1(shift == 4);
#define LIFTS(src, ref, inv) \
((inv) ? (src) + (((ref) + 4 * (src)) >> shift) \
: -((-16 * (src) + (ref) + add / \
4 + 1 + (5 << 25)) / (5 * 4) - (1 << 23)))
if (mirror_left) {
dst[0] = LIFTS(src[0], mul * 2 * ref[0] + add, inverse);
dst += dst_step;
src += src_step;
}
for (i = 0; i < w; i++)
dst[i * dst_step] = LIFTS(src[i * src_step],
mul * (ref[i * ref_step] +
ref[(i + 1) * ref_step]) + add,
inverse);
if (mirror_right)
dst[w * dst_step] = LIFTS(src[w * src_step],
mul * 2 * ref[w * ref_step] + add,
inverse);
}
static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
{
const int width2 = width >> 1;
int x;
const int w2 = (width + 1) >> 1;
for (x = 0; x < width2; x++) {
temp[x] = b[2 * x];
temp[x + w2] = b[2 * x + 1];
}
if (width & 1)
temp[x] = b[2 * x];
lift(b + w2, temp + w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 0);
lift(b, temp, b + w2, 1, 1, 1, width, 1, 2, 2, 0, 0);
}
static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] -= (b0[i] + b2[i]) >> 1;
}
static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (b0[i] + b2[i] + 2) >> 2;
}
static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
int width, int height, int stride)
{
int y;
DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride;
DWTELEM *b1 = buffer + mirror(-2, height - 1) * stride;
for (y = -2; y < height; y += 2) {
DWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
if (y + 1 < (unsigned)height)
horizontal_decompose53i(b2, temp, width);
if (y + 2 < (unsigned)height)
horizontal_decompose53i(b3, temp, width);
if (y + 1 < (unsigned)height)
vertical_decompose53iH0(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_decompose53iL0(b0, b1, b2, width);
b0 = b2;
b1 = b3;
}
}
static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width)
{
const int w2 = (width + 1) >> 1;
lift(temp + w2, b + 1, b, 1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
liftS(temp, b, temp + w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0);
lift(b + w2, temp + w2, temp, 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
lift(b, temp, b + w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
}
static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] -= (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
}
static void vertical_decompose97iH1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
}
static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) /
(5 * 16) - (1 << 23);
}
static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
}
static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
int width, int height, int stride)
{
int y;
DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride;
DWTELEM *b1 = buffer + mirror(-4, height - 1) * stride;
DWTELEM *b2 = buffer + mirror(-4 + 1, height - 1) * stride;
DWTELEM *b3 = buffer + mirror(-4 + 2, height - 1) * stride;
for (y = -4; y < height; y += 2) {
DWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
if (y + 3 < (unsigned)height)
horizontal_decompose97i(b4, temp, width);
if (y + 4 < (unsigned)height)
horizontal_decompose97i(b5, temp, width);
if (y + 3 < (unsigned)height)
vertical_decompose97iH0(b3, b4, b5, width);
if (y + 2 < (unsigned)height)
vertical_decompose97iL0(b2, b3, b4, width);
if (y + 1 < (unsigned)height)
vertical_decompose97iH1(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_decompose97iL1(b0, b1, b2, width);
b0 = b2;
b1 = b3;
b2 = b4;
b3 = b5;
}
}
void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height,
int stride, int type, int decomposition_count)
{
int level;
for (level = 0; level < decomposition_count; level++) {
switch (type) {
case DWT_97:
spatial_decompose97i(buffer, temp,
width >> level, height >> level,
stride << level);
break;
case DWT_53:
spatial_decompose53i(buffer, temp,
width >> level, height >> level,
stride << level);
break;
}
}
}
static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
{
const int width2 = width >> 1;
const int w2 = (width + 1) >> 1;
int x;
for (x = 0; x < width2; x++) {
temp[2 * x] = b[x];
temp[2 * x + 1] = b[x + w2];
}
if (width & 1)
temp[2 * x] = b[x];
b[0] = temp[0] - ((temp[1] + 1) >> 1);
for (x = 2; x < width - 1; x += 2) {
b[x] = temp[x] - ((temp[x - 1] + temp[x + 1] + 2) >> 2);
b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
}
if (width & 1) {
b[x] = temp[x] - ((temp[x - 1] + 1) >> 1);
b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
} else
b[x - 1] = temp[x - 1] + b[x - 2];
}
static void vertical_compose53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (b0[i] + b2[i]) >> 1;
}
static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] -= (b0[i] + b2[i] + 2) >> 2;
}
static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb,
int height, int stride_line)
{
cs->b0 = slice_buffer_get_line(sb,
mirror(-1 - 1, height - 1) * stride_line);
cs->b1 = slice_buffer_get_line(sb, mirror(-1, height - 1) * stride_line);
cs->y = -1;
}
static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
int height, int stride)
{
cs->b0 = buffer + mirror(-1 - 1, height - 1) * stride;
cs->b1 = buffer + mirror(-1, height - 1) * stride;
cs->y = -1;
}
static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
IDWTELEM *temp,
int width, int height,
int stride_line)
{
int y = cs->y;
IDWTELEM *b0 = cs->b0;
IDWTELEM *b1 = cs->b1;
IDWTELEM *b2 = slice_buffer_get_line(sb,
mirror(y + 1, height - 1) *
stride_line);
IDWTELEM *b3 = slice_buffer_get_line(sb,
mirror(y + 2, height - 1) *
stride_line);
if (y + 1 < (unsigned)height && y < (unsigned)height) {
int x;
for (x = 0; x < width; x++) {
b2[x] -= (b1[x] + b3[x] + 2) >> 2;
b1[x] += (b0[x] + b2[x]) >> 1;
}
} else {
if (y + 1 < (unsigned)height)
vertical_compose53iL0(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_compose53iH0(b0, b1, b2, width);
}
if (y - 1 < (unsigned)height)
horizontal_compose53i(b0, temp, width);
if (y + 0 < (unsigned)height)
horizontal_compose53i(b1, temp, width);
cs->b0 = b2;
cs->b1 = b3;
cs->y += 2;
}
static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
IDWTELEM *temp, int width, int height,
int stride)
{
int y = cs->y;
IDWTELEM *b0 = cs->b0;
IDWTELEM *b1 = cs->b1;
IDWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
IDWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
if (y + 1 < (unsigned)height)
vertical_compose53iL0(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_compose53iH0(b0, b1, b2, width);
if (y - 1 < (unsigned)height)
horizontal_compose53i(b0, temp, width);
if (y + 0 < (unsigned)height)
horizontal_compose53i(b1, temp, width);
cs->b0 = b2;
cs->b1 = b3;
cs->y += 2;
}
void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
{
const int w2 = (width + 1) >> 1;
int x;
temp[0] = b[0] - ((3 * b[w2] + 2) >> 2);
for (x = 1; x < (width >> 1); x++) {
temp[2 * x] = b[x] - ((3 * (b[x + w2 - 1] + b[x + w2]) + 4) >> 3);
temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
}
if (width & 1) {
temp[2 * x] = b[x] - ((3 * b[x + w2 - 1] + 2) >> 2);
temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
} else
temp[2 * x - 1] = b[x + w2 - 1] - 2 * temp[2 * x - 2];
b[0] = temp[0] + ((2 * temp[0] + temp[1] + 4) >> 3);
for (x = 2; x < width - 1; x += 2) {
b[x] = temp[x] + ((4 * temp[x] + temp[x - 1] + temp[x + 1] + 8) >> 4);
b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
}
if (width & 1) {
b[x] = temp[x] + ((2 * temp[x] + temp[x - 1] + 4) >> 3);
b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
} else
b[x - 1] = temp[x - 1] + 3 * b[x - 2];
}
static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
}
static void vertical_compose97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] -= (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
}
static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS;
}
static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int width)
{
int i;
for (i = 0; i < width; i++)
b1[i] -= (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
}
void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
int width)
{
int i;
for (i = 0; i < width; i++) {
b4[i] -= (W_DM * (b3[i] + b5[i]) + W_DO) >> W_DS;
b3[i] -= (W_CM * (b2[i] + b4[i]) + W_CO) >> W_CS;
b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS;
b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
}
}
static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb,
int height, int stride_line)
{
cs->b0 = slice_buffer_get_line(sb, mirror(-3 - 1, height - 1) * stride_line);
cs->b1 = slice_buffer_get_line(sb, mirror(-3, height - 1) * stride_line);
cs->b2 = slice_buffer_get_line(sb, mirror(-3 + 1, height - 1) * stride_line);
cs->b3 = slice_buffer_get_line(sb, mirror(-3 + 2, height - 1) * stride_line);
cs->y = -3;
}
static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height,
int stride)
{
cs->b0 = buffer + mirror(-3 - 1, height - 1) * stride;
cs->b1 = buffer + mirror(-3, height - 1) * stride;
cs->b2 = buffer + mirror(-3 + 1, height - 1) * stride;
cs->b3 = buffer + mirror(-3 + 2, height - 1) * stride;
cs->y = -3;
}
static void spatial_compose97i_dy_buffered(SnowDWTContext *dsp, DWTCompose *cs,
slice_buffer * sb, IDWTELEM *temp,
int width, int height,
int stride_line)
{
int y = cs->y;
IDWTELEM *b0 = cs->b0;
IDWTELEM *b1 = cs->b1;
IDWTELEM *b2 = cs->b2;
IDWTELEM *b3 = cs->b3;
IDWTELEM *b4 = slice_buffer_get_line(sb,
mirror(y + 3, height - 1) *
stride_line);
IDWTELEM *b5 = slice_buffer_get_line(sb,
mirror(y + 4, height - 1) *
stride_line);
if (y > 0 && y + 4 < height) {
dsp->vertical_compose97i(b0, b1, b2, b3, b4, b5, width);
} else {
if (y + 3 < (unsigned)height)
vertical_compose97iL1(b3, b4, b5, width);
if (y + 2 < (unsigned)height)
vertical_compose97iH1(b2, b3, b4, width);
if (y + 1 < (unsigned)height)
vertical_compose97iL0(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_compose97iH0(b0, b1, b2, width);
}
if (y - 1 < (unsigned)height)
dsp->horizontal_compose97i(b0, temp, width);
if (y + 0 < (unsigned)height)
dsp->horizontal_compose97i(b1, temp, width);
cs->b0 = b2;
cs->b1 = b3;
cs->b2 = b4;
cs->b3 = b5;
cs->y += 2;
}
static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
IDWTELEM *temp, int width, int height,
int stride)
{
int y = cs->y;
IDWTELEM *b0 = cs->b0;
IDWTELEM *b1 = cs->b1;
IDWTELEM *b2 = cs->b2;
IDWTELEM *b3 = cs->b3;
IDWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
IDWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
if (y + 3 < (unsigned)height)
vertical_compose97iL1(b3, b4, b5, width);
if (y + 2 < (unsigned)height)
vertical_compose97iH1(b2, b3, b4, width);
if (y + 1 < (unsigned)height)
vertical_compose97iL0(b1, b2, b3, width);
if (y + 0 < (unsigned)height)
vertical_compose97iH0(b0, b1, b2, width);
if (y - 1 < (unsigned)height)
ff_snow_horizontal_compose97i(b0, temp, width);
if (y + 0 < (unsigned)height)
ff_snow_horizontal_compose97i(b1, temp, width);
cs->b0 = b2;
cs->b1 = b3;
cs->b2 = b4;
cs->b3 = b5;
cs->y += 2;
}
void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
int height, int stride_line, int type,
int decomposition_count)
{
int level;
for (level = decomposition_count - 1; level >= 0; level--) {
switch (type) {
case DWT_97:
spatial_compose97i_buffered_init(cs + level, sb, height >> level,
stride_line << level);
break;
case DWT_53:
spatial_compose53i_buffered_init(cs + level, sb, height >> level,
stride_line << level);
break;
}
}
}
void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
slice_buffer *slice_buf, IDWTELEM *temp,
int width, int height, int stride_line,
int type, int decomposition_count, int y)
{
const int support = type == 1 ? 3 : 5;
int level;
if (type == 2)
return;
for (level = decomposition_count - 1; level >= 0; level--)
while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
switch (type) {
case DWT_97:
spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp,
width >> level,
height >> level,
stride_line << level);
break;
case DWT_53:
spatial_compose53i_dy_buffered(cs + level, slice_buf, temp,
width >> level,
height >> level,
stride_line << level);
break;
}
}
}
static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
int height, int stride, int type,
int decomposition_count)
{
int level;
for (level = decomposition_count - 1; level >= 0; level--) {
switch (type) {
case DWT_97:
spatial_compose97i_init(cs + level, buffer, height >> level,
stride << level);
break;
case DWT_53:
spatial_compose53i_init(cs + level, buffer, height >> level,
stride << level);
break;
}
}
}
static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
IDWTELEM *temp, int width, int height,
int stride, int type,
int decomposition_count, int y)
{
const int support = type == 1 ? 3 : 5;
int level;
if (type == 2)
return;
for (level = decomposition_count - 1; level >= 0; level--)
while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
switch (type) {
case DWT_97:
spatial_compose97i_dy(cs + level, buffer, temp, width >> level,
height >> level, stride << level);
break;
case DWT_53:
spatial_compose53i_dy(cs + level, buffer, temp, width >> level,
height >> level, stride << level);
break;
}
}
}
void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
int stride, int type, int decomposition_count)
{
DWTCompose cs[MAX_DECOMPOSITIONS];
int y;
ff_spatial_idwt_init(cs, buffer, width, height, stride, type,
decomposition_count);
for (y = 0; y < height; y += 4)
ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
decomposition_count, y);
}
static inline int w_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size,
int w, int h, int type)
{
int s, i, j;
const int dec_count = w == 8 ? 3 : 4;
int tmp[32 * 32], tmp2[32];
int level, ori;
static const int scale[2][2][4][4] = {
{
{ // 9/7 8x8 dec=3
{ 268, 239, 239, 213 },
{ 0, 224, 224, 152 },
{ 0, 135, 135, 110 },
},
{ // 9/7 16x16 or 32x32 dec=4
{ 344, 310, 310, 280 },
{ 0, 320, 320, 228 },
{ 0, 175, 175, 136 },
{ 0, 129, 129, 102 },
}
},
{
{ // 5/3 8x8 dec=3
{ 275, 245, 245, 218 },
{ 0, 230, 230, 156 },
{ 0, 138, 138, 113 },
},
{ // 5/3 16x16 or 32x32 dec=4
{ 352, 317, 317, 286 },
{ 0, 328, 328, 233 },
{ 0, 180, 180, 140 },
{ 0, 132, 132, 105 },
}
}
};
for (i = 0; i < h; i++) {
for (j = 0; j < w; j += 4) {
tmp[32 * i + j + 0] = (pix1[j + 0] - pix2[j + 0]) << 4;
tmp[32 * i + j + 1] = (pix1[j + 1] - pix2[j + 1]) << 4;
tmp[32 * i + j + 2] = (pix1[j + 2] - pix2[j + 2]) << 4;
tmp[32 * i + j + 3] = (pix1[j + 3] - pix2[j + 3]) << 4;
}
pix1 += line_size;
pix2 += line_size;
}
ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count);
s = 0;
av_assert1(w == h);
for (level = 0; level < dec_count; level++)
for (ori = level ? 1 : 0; ori < 4; ori++) {
int size = w >> (dec_count - level);
int sx = (ori & 1) ? size : 0;
int stride = 32 << (dec_count - level);
int sy = (ori & 2) ? stride >> 1 : 0;
for (i = 0; i < size; i++)
for (j = 0; j < size; j++) {
int v = tmp[sx + sy + i * stride + j] *
scale[type][dec_count - 3][level][ori];
s += FFABS(v);
}
}
av_assert1(s >= 0);
return s >> 9;
}
static int w53_8_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 8, h, 1);
}
static int w97_8_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 8, h, 0);
}
static int w53_16_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 16, h, 1);
}
static int w97_16_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 16, h, 0);
}
int ff_w53_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 32, h, 1);
}
int ff_w97_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h)
{
return w_c(v, pix1, pix2, line_size, 32, h, 0);
}
void ff_dsputil_init_dwt(MECmpContext *c)
{
c->w53[0] = w53_16_c;
c->w53[1] = w53_8_c;
c->w97[0] = w97_16_c;
c->w97[1] = w97_8_c;
}
void ff_dwt_init(SnowDWTContext *c)
{
c->vertical_compose97i = ff_snow_vertical_compose97i;
c->horizontal_compose97i = ff_snow_horizontal_compose97i;
c->inner_add_yblock = ff_snow_inner_add_yblock;
if (HAVE_MMX)
ff_dwt_init_x86(c);
}
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