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ffmpeg.wasm-core
Commit 1ce5dce4 authored by Diego Biurrun's avatar Diego Biurrun
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dwt: Remove unused code.

parent 88386fee
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Showing with 1 addition and 172 deletions
libavcodec/dwt.c
View file @ 1ce5dce4
......@@ -145,38 +145,6 @@ static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
inverse);
}
static av_always_inline void inv_lift(IDWTELEM *dst, IDWTELEM *src, IDWTELEM *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);
}
}
#ifndef liftS
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,
......@@ -210,40 +178,6 @@ static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
inverse);
}
static av_always_inline void inv_liftS(IDWTELEM *dst, IDWTELEM *src,
IDWTELEM *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;
assert(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);
}
#endif /* ! liftS */
static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
{
const int width2 = width >> 1;
......@@ -256,41 +190,8 @@ static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
}
if (width & 1)
temp[x] = b[2 * x];
#if 0
{
int A1, A2, A3, A4;
A2 = temp[1];
A4 = temp[0];
A1 = temp[0 + width2];
A1 -= (A2 + A4) >> 1;
A4 += (A1 + 1) >> 1;
b[0 + width2] = A1;
b[0] = A4;
for (x = 1; x + 1 < width2; x += 2) {
A3 = temp[x + width2];
A4 = temp[x + 1];
A3 -= (A2 + A4) >> 1;
A2 += (A1 + A3 + 2) >> 2;
b[x + width2] = A3;
b[x] = A2;
A1 = temp[x + 1 + width2];
A2 = temp[x + 2];
A1 -= (A2 + A4) >> 1;
A4 += (A1 + A3 + 2) >> 2;
b[x + 1 + width2] = A1;
b[x + 1] = A4;
}
A3 = temp[width - 1];
A3 -= A2;
A2 += (A1 + A3 + 2) >> 2;
b[width - 1] = A3;
b[width2 - 1] = A2;
}
#else
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);
#endif /* 0 */
}
static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
......@@ -371,12 +272,8 @@ static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
int i;
for (i = 0; i < width; i++)
#ifdef liftS
b1[i] -= (W_BM * (b0[i] + b2[i]) + W_BO) >> W_BS;
#else
b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) /
(5 * 16) - (1 << 23);
#endif
}
static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
......@@ -580,15 +477,8 @@ static void av_unused spatial_compose53i(IDWTELEM *buffer, IDWTELEM *temp,
void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
{
const int w2 = (width + 1) >> 1;
#if 0 //maybe more understadable but slower
inv_lift(temp, b, b + w2, 2, 1, 1, width, W_DM, W_DO, W_DS, 0, 1);
inv_lift(temp + 1, b + w2, temp, 2, 1, 2, width, W_CM, W_CO, W_CS, 1, 1);
inv_liftS(b, temp, temp + 1, 2, 2, 2, width, W_BM, W_BO, W_BS, 0, 1);
inv_lift(b + 1, temp + 1, b, 2, 2, 2, width, W_AM, W_AO, W_AS, 1, 0);
#else
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);
......@@ -610,7 +500,6 @@ void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
} else
b[x - 1] = temp[x - 1] + 3 * b[x - 2];
#endif
}
static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
......@@ -637,11 +526,7 @@ static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
int i;
for (i = 0; i < width; i++)
#ifdef liftS
b1[i] += (W_BM * (b0[i] + b2[i]) + W_BO) >> W_BS;
#else
b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS;
#endif
}
static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
......@@ -662,11 +547,7 @@ void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
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;
#ifdef liftS
b2[i] += (W_BM * (b1[i] + b3[i]) + W_BO) >> W_BS;
#else
b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS;
#endif
b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
}
}
......
libavcodec/dwt.h
View file @ 1ce5dce4
......@@ -63,7 +63,6 @@ typedef struct DWTContext {
#define DWT_53 1
#define liftS lift
#if 1
#define W_AM 3
#define W_AO 0
#define W_AS 1
......@@ -80,57 +79,6 @@ typedef struct DWTContext {
#define W_DM 3
#define W_DO 4
#define W_DS 3
#elif 0
#define W_AM 55
#define W_AO 16
#define W_AS 5
#define W_BM 3
#define W_BO 32
#define W_BS 6
#define W_CM 127
#define W_CO 64
#define W_CS 7
#define W_DM 7
#define W_DO 8
#define W_DS 4
#elif 0
#define W_AM 97
#define W_AO 32
#define W_AS 6
#define W_BM 63
#define W_BO 512
#define W_BS 10
#define W_CM 13
#define W_CO 8
#define W_CS 4
#define W_DM 15
#define W_DO 16
#define W_DS 5
#else
#define W_AM 203
#define W_AO 64
#define W_AS 7
#define W_BM 217
#define W_BO 2048
#define W_BS 12
#define W_CM 113
#define W_CO 64
#define W_CS 7
#define W_DM 227
#define W_DO 128
#define W_DS 9
#endif
#define slice_buffer_get_line(slice_buf, line_num) \
((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] \
......
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