mirror of
https://github.com/DrKLO/Telegram.git
synced 2024-12-23 06:50:36 +01:00
334 lines
14 KiB
C
334 lines
14 KiB
C
|
// Copyright 2012 Google Inc. All Rights Reserved.
|
||
|
|
//
|
||
|
|
// Use of this source code is governed by a BSD-style license
|
||
|
|
// that can be found in the COPYING file in the root of the source
|
||
|
|
// tree. An additional intellectual property rights grant can be found
|
||
|
|
// in the file PATENTS. All contributing project authors may
|
||
|
|
// be found in the AUTHORS file in the root of the source tree.
|
||
|
|
// -----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Rescaling functions
|
||
|
|
//
|
||
|
|
// Author: Skal (pascal.massimino@gmail.com)
|
||
|
|
|
||
|
|
#include <assert.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include "./rescaler.h"
|
||
|
|
#include "../dsp/dsp.h"
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Implementations of critical functions ImportRow / ExportRow
|
||
|
|
|
||
|
|
void (*WebPRescalerImportRow)(WebPRescaler* const wrk,
|
||
|
|
const uint8_t* const src, int channel) = NULL;
|
||
|
|
void (*WebPRescalerExportRow)(WebPRescaler* const wrk, int x_out) = NULL;
|
||
|
|
|
||
|
|
#define RFIX 30
|
||
|
|
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
|
||
|
|
|
||
|
|
static void ImportRowC(WebPRescaler* const wrk,
|
||
|
|
const uint8_t* const src, int channel) {
|
||
|
|
const int x_stride = wrk->num_channels;
|
||
|
|
const int x_out_max = wrk->dst_width * wrk->num_channels;
|
||
|
|
int x_in = channel;
|
||
|
|
int x_out;
|
||
|
|
int accum = 0;
|
||
|
|
if (!wrk->x_expand) {
|
||
|
|
int sum = 0;
|
||
|
|
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
|
||
|
|
accum += wrk->x_add;
|
||
|
|
for (; accum > 0; accum -= wrk->x_sub) {
|
||
|
|
sum += src[x_in];
|
||
|
|
x_in += x_stride;
|
||
|
|
}
|
||
|
|
{ // Emit next horizontal pixel.
|
||
|
|
const int32_t base = src[x_in];
|
||
|
|
const int32_t frac = base * (-accum);
|
||
|
|
x_in += x_stride;
|
||
|
|
wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac;
|
||
|
|
// fresh fractional start for next pixel
|
||
|
|
sum = (int)MULT_FIX(frac, wrk->fx_scale);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else { // simple bilinear interpolation
|
||
|
|
int left = src[channel], right = src[channel];
|
||
|
|
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
|
||
|
|
if (accum < 0) {
|
||
|
|
left = right;
|
||
|
|
x_in += x_stride;
|
||
|
|
right = src[x_in];
|
||
|
|
accum += wrk->x_add;
|
||
|
|
}
|
||
|
|
wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum;
|
||
|
|
accum -= wrk->x_sub;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Accumulate the contribution of the new row.
|
||
|
|
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
|
||
|
|
wrk->irow[x_out] += wrk->frow[x_out];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ExportRowC(WebPRescaler* const wrk, int x_out) {
|
||
|
|
if (wrk->y_accum <= 0) {
|
||
|
|
uint8_t* const dst = wrk->dst;
|
||
|
|
int32_t* const irow = wrk->irow;
|
||
|
|
const int32_t* const frow = wrk->frow;
|
||
|
|
const int yscale = wrk->fy_scale * (-wrk->y_accum);
|
||
|
|
const int x_out_max = wrk->dst_width * wrk->num_channels;
|
||
|
|
for (; x_out < x_out_max; ++x_out) {
|
||
|
|
const int frac = (int)MULT_FIX(frow[x_out], yscale);
|
||
|
|
const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale);
|
||
|
|
dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
|
||
|
|
irow[x_out] = frac; // new fractional start
|
||
|
|
}
|
||
|
|
wrk->y_accum += wrk->y_add;
|
||
|
|
wrk->dst += wrk->dst_stride;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// MIPS version
|
||
|
|
|
||
|
|
#if defined(WEBP_USE_MIPS32)
|
||
|
|
|
||
|
|
static void ImportRowMIPS(WebPRescaler* const wrk,
|
||
|
|
const uint8_t* const src, int channel) {
|
||
|
|
const int x_stride = wrk->num_channels;
|
||
|
|
const int x_out_max = wrk->dst_width * wrk->num_channels;
|
||
|
|
const int fx_scale = wrk->fx_scale;
|
||
|
|
const int x_add = wrk->x_add;
|
||
|
|
const int x_sub = wrk->x_sub;
|
||
|
|
int* frow = wrk->frow + channel;
|
||
|
|
int* irow = wrk->irow + channel;
|
||
|
|
const uint8_t* src1 = src + channel;
|
||
|
|
int temp1, temp2, temp3;
|
||
|
|
int base, frac, sum;
|
||
|
|
int accum, accum1;
|
||
|
|
const int x_stride1 = x_stride << 2;
|
||
|
|
int loop_c = x_out_max - channel;
|
||
|
|
|
||
|
|
if (!wrk->x_expand) {
|
||
|
|
__asm__ volatile (
|
||
|
|
"li %[temp1], 0x8000 \n\t"
|
||
|
|
"li %[temp2], 0x10000 \n\t"
|
||
|
|
"li %[sum], 0 \n\t"
|
||
|
|
"li %[accum], 0 \n\t"
|
||
|
|
"1: \n\t"
|
||
|
|
"addu %[accum], %[accum], %[x_add] \n\t"
|
||
|
|
"blez %[accum], 3f \n\t"
|
||
|
|
"2: \n\t"
|
||
|
|
"lbu %[temp3], 0(%[src1]) \n\t"
|
||
|
|
"subu %[accum], %[accum], %[x_sub] \n\t"
|
||
|
|
"addu %[src1], %[src1], %[x_stride] \n\t"
|
||
|
|
"addu %[sum], %[sum], %[temp3] \n\t"
|
||
|
|
"bgtz %[accum], 2b \n\t"
|
||
|
|
"3: \n\t"
|
||
|
|
"lbu %[base], 0(%[src1]) \n\t"
|
||
|
|
"addu %[src1], %[src1], %[x_stride] \n\t"
|
||
|
|
"negu %[accum1], %[accum] \n\t"
|
||
|
|
"mul %[frac], %[base], %[accum1] \n\t"
|
||
|
|
"addu %[temp3], %[sum], %[base] \n\t"
|
||
|
|
"mul %[temp3], %[temp3], %[x_sub] \n\t"
|
||
|
|
"lw %[base], 0(%[irow]) \n\t"
|
||
|
|
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
|
||
|
|
"sll %[accum1], %[frac], 2 \n\t"
|
||
|
|
"mult %[temp1], %[temp2] \n\t"
|
||
|
|
"madd %[accum1], %[fx_scale] \n\t"
|
||
|
|
"mfhi %[sum] \n\t"
|
||
|
|
"subu %[temp3], %[temp3], %[frac] \n\t"
|
||
|
|
"sw %[temp3], 0(%[frow]) \n\t"
|
||
|
|
"add %[base], %[base], %[temp3] \n\t"
|
||
|
|
"sw %[base], 0(%[irow]) \n\t"
|
||
|
|
"addu %[irow], %[irow], %[x_stride1] \n\t"
|
||
|
|
"addu %[frow], %[frow], %[x_stride1] \n\t"
|
||
|
|
"bgtz %[loop_c], 1b \n\t"
|
||
|
|
|
||
|
|
: [accum] "=&r" (accum), [src1] "+r" (src1), [temp3] "=&r" (temp3),
|
||
|
|
[sum] "=&r" (sum), [base] "=&r" (base), [frac] "=&r" (frac),
|
||
|
|
[frow] "+r" (frow), [irow] "+r" (irow), [accum1] "=&r" (accum1),
|
||
|
|
[temp2] "=&r" (temp2), [temp1] "=&r" (temp1)
|
||
|
|
: [x_stride] "r" (x_stride), [fx_scale] "r" (fx_scale),
|
||
|
|
[x_sub] "r" (x_sub), [x_add] "r" (x_add),
|
||
|
|
[loop_c] "r" (loop_c), [x_stride1] "r" (x_stride1)
|
||
|
|
: "memory", "hi", "lo"
|
||
|
|
);
|
||
|
|
} else {
|
||
|
|
__asm__ volatile (
|
||
|
|
"lbu %[temp1], 0(%[src1]) \n\t"
|
||
|
|
"move %[temp2], %[temp1] \n\t"
|
||
|
|
"li %[accum], 0 \n\t"
|
||
|
|
"1: \n\t"
|
||
|
|
"bgez %[accum], 2f \n\t"
|
||
|
|
"move %[temp2], %[temp1] \n\t"
|
||
|
|
"addu %[src1], %[x_stride] \n\t"
|
||
|
|
"lbu %[temp1], 0(%[src1]) \n\t"
|
||
|
|
"addu %[accum], %[x_add] \n\t"
|
||
|
|
"2: \n\t"
|
||
|
|
"subu %[temp3], %[temp2], %[temp1] \n\t"
|
||
|
|
"mul %[temp3], %[temp3], %[accum] \n\t"
|
||
|
|
"mul %[base], %[temp1], %[x_add] \n\t"
|
||
|
|
"subu %[accum], %[accum], %[x_sub] \n\t"
|
||
|
|
"lw %[frac], 0(%[irow]) \n\t"
|
||
|
|
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
|
||
|
|
"addu %[temp3], %[base], %[temp3] \n\t"
|
||
|
|
"sw %[temp3], 0(%[frow]) \n\t"
|
||
|
|
"addu %[frow], %[x_stride1] \n\t"
|
||
|
|
"addu %[frac], %[temp3] \n\t"
|
||
|
|
"sw %[frac], 0(%[irow]) \n\t"
|
||
|
|
"addu %[irow], %[x_stride1] \n\t"
|
||
|
|
"bgtz %[loop_c], 1b \n\t"
|
||
|
|
|
||
|
|
: [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
|
||
|
|
[temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [base] "=&r" (base),
|
||
|
|
[frac] "=&r" (frac), [frow] "+r" (frow), [irow] "+r" (irow)
|
||
|
|
: [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
|
||
|
|
[x_stride1] "r" (x_stride1), [loop_c] "r" (loop_c)
|
||
|
|
: "memory", "hi", "lo"
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ExportRowMIPS(WebPRescaler* const wrk, int x_out) {
|
||
|
|
if (wrk->y_accum <= 0) {
|
||
|
|
uint8_t* const dst = wrk->dst;
|
||
|
|
int32_t* const irow = wrk->irow;
|
||
|
|
const int32_t* const frow = wrk->frow;
|
||
|
|
const int yscale = wrk->fy_scale * (-wrk->y_accum);
|
||
|
|
const int x_out_max = wrk->dst_width * wrk->num_channels;
|
||
|
|
// if wrk->fxy_scale can fit into 32 bits use optimized code,
|
||
|
|
// otherwise use C code
|
||
|
|
if ((wrk->fxy_scale >> 32) == 0) {
|
||
|
|
int temp0, temp1, temp3, temp4, temp5, temp6, temp7, loop_end;
|
||
|
|
const int temp2 = (int)(wrk->fxy_scale);
|
||
|
|
const int temp8 = x_out_max << 2;
|
||
|
|
uint8_t* dst_t = (uint8_t*)dst;
|
||
|
|
int32_t* irow_t = (int32_t*)irow;
|
||
|
|
const int32_t* frow_t = (const int32_t*)frow;
|
||
|
|
|
||
|
|
__asm__ volatile(
|
||
|
|
"addiu %[temp6], $zero, -256 \n\t"
|
||
|
|
"addiu %[temp7], $zero, 255 \n\t"
|
||
|
|
"li %[temp3], 0x10000 \n\t"
|
||
|
|
"li %[temp4], 0x8000 \n\t"
|
||
|
|
"addu %[loop_end], %[frow_t], %[temp8] \n\t"
|
||
|
|
"1: \n\t"
|
||
|
|
"lw %[temp0], 0(%[frow_t]) \n\t"
|
||
|
|
"mult %[temp3], %[temp4] \n\t"
|
||
|
|
"addiu %[frow_t], %[frow_t], 4 \n\t"
|
||
|
|
"sll %[temp0], %[temp0], 2 \n\t"
|
||
|
|
"madd %[temp0], %[yscale] \n\t"
|
||
|
|
"mfhi %[temp1] \n\t"
|
||
|
|
"lw %[temp0], 0(%[irow_t]) \n\t"
|
||
|
|
"addiu %[dst_t], %[dst_t], 1 \n\t"
|
||
|
|
"addiu %[irow_t], %[irow_t], 4 \n\t"
|
||
|
|
"subu %[temp0], %[temp0], %[temp1] \n\t"
|
||
|
|
"mult %[temp3], %[temp4] \n\t"
|
||
|
|
"sll %[temp0], %[temp0], 2 \n\t"
|
||
|
|
"madd %[temp0], %[temp2] \n\t"
|
||
|
|
"mfhi %[temp5] \n\t"
|
||
|
|
"sw %[temp1], -4(%[irow_t]) \n\t"
|
||
|
|
"and %[temp0], %[temp5], %[temp6] \n\t"
|
||
|
|
"slti %[temp1], %[temp5], 0 \n\t"
|
||
|
|
"beqz %[temp0], 2f \n\t"
|
||
|
|
"xor %[temp5], %[temp5], %[temp5] \n\t"
|
||
|
|
"movz %[temp5], %[temp7], %[temp1] \n\t"
|
||
|
|
"2: \n\t"
|
||
|
|
"sb %[temp5], -1(%[dst_t]) \n\t"
|
||
|
|
"bne %[frow_t], %[loop_end], 1b \n\t"
|
||
|
|
|
||
|
|
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
|
||
|
|
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
|
||
|
|
[temp7]"=&r"(temp7), [frow_t]"+r"(frow_t), [irow_t]"+r"(irow_t),
|
||
|
|
[dst_t]"+r"(dst_t), [loop_end]"=&r"(loop_end)
|
||
|
|
: [temp2]"r"(temp2), [yscale]"r"(yscale), [temp8]"r"(temp8)
|
||
|
|
: "memory", "hi", "lo"
|
||
|
|
);
|
||
|
|
wrk->y_accum += wrk->y_add;
|
||
|
|
wrk->dst += wrk->dst_stride;
|
||
|
|
} else {
|
||
|
|
ExportRowC(wrk, x_out);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif // WEBP_USE_MIPS32
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,
|
||
|
|
uint8_t* const dst, int dst_width, int dst_height,
|
||
|
|
int dst_stride, int num_channels, int x_add, int x_sub,
|
||
|
|
int y_add, int y_sub, int32_t* const work) {
|
||
|
|
wrk->x_expand = (src_width < dst_width);
|
||
|
|
wrk->src_width = src_width;
|
||
|
|
wrk->src_height = src_height;
|
||
|
|
wrk->dst_width = dst_width;
|
||
|
|
wrk->dst_height = dst_height;
|
||
|
|
wrk->dst = dst;
|
||
|
|
wrk->dst_stride = dst_stride;
|
||
|
|
wrk->num_channels = num_channels;
|
||
|
|
// for 'x_expand', we use bilinear interpolation
|
||
|
|
wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add - x_sub;
|
||
|
|
wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub;
|
||
|
|
wrk->y_accum = y_add;
|
||
|
|
wrk->y_add = y_add;
|
||
|
|
wrk->y_sub = y_sub;
|
||
|
|
wrk->fx_scale = (1 << RFIX) / x_sub;
|
||
|
|
wrk->fy_scale = (1 << RFIX) / y_sub;
|
||
|
|
wrk->fxy_scale = wrk->x_expand ?
|
||
|
|
((int64_t)dst_height << RFIX) / (x_sub * src_height) :
|
||
|
|
((int64_t)dst_height << RFIX) / (x_add * src_height);
|
||
|
|
wrk->irow = work;
|
||
|
|
wrk->frow = work + num_channels * dst_width;
|
||
|
|
|
||
|
|
if (WebPRescalerImportRow == NULL) {
|
||
|
|
WebPRescalerImportRow = ImportRowC;
|
||
|
|
WebPRescalerExportRow = ExportRowC;
|
||
|
|
if (VP8GetCPUInfo != NULL) {
|
||
|
|
#if defined(WEBP_USE_MIPS32)
|
||
|
|
if (VP8GetCPUInfo(kMIPS32)) {
|
||
|
|
WebPRescalerImportRow = ImportRowMIPS;
|
||
|
|
WebPRescalerExportRow = ExportRowMIPS;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#undef MULT_FIX
|
||
|
|
#undef RFIX
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// all-in-one calls
|
||
|
|
|
||
|
|
int WebPRescaleNeededLines(const WebPRescaler* const wrk, int max_num_lines) {
|
||
|
|
const int num_lines = (wrk->y_accum + wrk->y_sub - 1) / wrk->y_sub;
|
||
|
|
return (num_lines > max_num_lines) ? max_num_lines : num_lines;
|
||
|
|
}
|
||
|
|
|
||
|
|
int WebPRescalerImport(WebPRescaler* const wrk, int num_lines,
|
||
|
|
const uint8_t* src, int src_stride) {
|
||
|
|
int total_imported = 0;
|
||
|
|
while (total_imported < num_lines && wrk->y_accum > 0) {
|
||
|
|
int channel;
|
||
|
|
for (channel = 0; channel < wrk->num_channels; ++channel) {
|
||
|
|
WebPRescalerImportRow(wrk, src, channel);
|
||
|
|
}
|
||
|
|
src += src_stride;
|
||
|
|
++total_imported;
|
||
|
|
wrk->y_accum -= wrk->y_sub;
|
||
|
|
}
|
||
|
|
return total_imported;
|
||
|
|
}
|
||
|
|
|
||
|
|
int WebPRescalerExport(WebPRescaler* const rescaler) {
|
||
|
|
int total_exported = 0;
|
||
|
|
while (WebPRescalerHasPendingOutput(rescaler)) {
|
||
|
|
WebPRescalerExportRow(rescaler, 0);
|
||
|
|
++total_exported;
|
||
|
|
}
|
||
|
|
return total_exported;
|
||
|
|
}
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|