2 * Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "swscale_internal.h"
23 /// Scaler instance data
24 typedef struct FilterContext
32 /// Color conversion instance data
33 typedef struct ColorContext
38 static int lum_h_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
40 FilterContext *instance = desc->instance;
41 int srcW = desc->src->width;
42 int dstW = desc->dst->width;
43 int xInc = instance->xInc;
46 for (i = 0; i < sliceH; ++i) {
47 uint8_t ** src = desc->src->plane[0].line;
48 uint8_t ** dst = desc->dst->plane[0].line;
49 int src_pos = sliceY+i - desc->src->plane[0].sliceY;
50 int dst_pos = sliceY+i - desc->dst->plane[0].sliceY;
53 if (c->hyscale_fast) {
54 c->hyscale_fast(c, (int16_t*)dst[dst_pos], dstW, src[src_pos], srcW, xInc);
56 c->hyScale(c, (int16_t*)dst[dst_pos], dstW, (const uint8_t *)src[src_pos], instance->filter,
57 instance->filter_pos, instance->filter_size);
60 if (c->lumConvertRange)
61 c->lumConvertRange((int16_t*)dst[dst_pos], dstW);
63 desc->dst->plane[0].sliceH += 1;
66 src = desc->src->plane[3].line;
67 dst = desc->dst->plane[3].line;
69 src_pos = sliceY+i - desc->src->plane[3].sliceY;
70 dst_pos = sliceY+i - desc->dst->plane[3].sliceY;
72 desc->dst->plane[3].sliceH += 1;
74 if (c->hyscale_fast) {
75 c->hyscale_fast(c, (int16_t*)dst[dst_pos], dstW, src[src_pos], srcW, xInc);
77 c->hyScale(c, (int16_t*)dst[dst_pos], dstW, (const uint8_t *)src[src_pos], instance->filter,
78 instance->filter_pos, instance->filter_size);
86 static int lum_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
88 int srcW = desc->src->width;
89 ColorContext * instance = desc->instance;
90 uint32_t * pal = instance->pal;
93 desc->dst->plane[0].sliceY = sliceY;
94 desc->dst->plane[0].sliceH = sliceH;
95 desc->dst->plane[3].sliceY = sliceY;
96 desc->dst->plane[3].sliceH = sliceH;
98 for (i = 0; i < sliceH; ++i) {
99 int sp0 = sliceY+i - desc->src->plane[0].sliceY;
100 int sp1 = ((sliceY+i) >> desc->src->v_chr_sub_sample) - desc->src->plane[1].sliceY;
101 const uint8_t * src[4] = { desc->src->plane[0].line[sp0],
102 desc->src->plane[1].line[sp1],
103 desc->src->plane[2].line[sp1],
104 desc->src->plane[3].line[sp0]};
105 uint8_t * dst = desc->dst->plane[0].line[i];
108 c->lumToYV12(dst, src[0], src[1], src[2], srcW, pal);
109 } else if (c->readLumPlanar) {
110 c->readLumPlanar(dst, src, srcW, c->input_rgb2yuv_table);
115 dst = desc->dst->plane[3].line[i];
117 c->alpToYV12(dst, src[3], src[1], src[2], srcW, pal);
118 } else if (c->readAlpPlanar) {
119 c->readAlpPlanar(dst, src, srcW, NULL);
127 int ff_init_desc_fmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal)
129 ColorContext * li = av_malloc(sizeof(ColorContext));
131 return AVERROR(ENOMEM);
135 desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
138 desc->process = &lum_convert;
144 int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc)
146 FilterContext *li = av_malloc(sizeof(FilterContext));
148 return AVERROR(ENOMEM);
151 li->filter_pos = filter_pos;
152 li->filter_size = filter_size;
157 desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
161 desc->process = &lum_h_scale;
166 static int chr_h_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
168 FilterContext *instance = desc->instance;
169 int srcW = AV_CEIL_RSHIFT(desc->src->width, desc->src->h_chr_sub_sample);
170 int dstW = AV_CEIL_RSHIFT(desc->dst->width, desc->dst->h_chr_sub_sample);
171 int xInc = instance->xInc;
173 uint8_t ** src1 = desc->src->plane[1].line;
174 uint8_t ** dst1 = desc->dst->plane[1].line;
175 uint8_t ** src2 = desc->src->plane[2].line;
176 uint8_t ** dst2 = desc->dst->plane[2].line;
178 int src_pos1 = sliceY - desc->src->plane[1].sliceY;
179 int dst_pos1 = sliceY - desc->dst->plane[1].sliceY;
181 int src_pos2 = sliceY - desc->src->plane[2].sliceY;
182 int dst_pos2 = sliceY - desc->dst->plane[2].sliceY;
185 for (i = 0; i < sliceH; ++i) {
186 if (c->hcscale_fast) {
187 c->hcscale_fast(c, (uint16_t*)dst1[dst_pos1+i], (uint16_t*)dst2[dst_pos2+i], dstW, src1[src_pos1+i], src2[src_pos2+i], srcW, xInc);
189 c->hcScale(c, (uint16_t*)dst1[dst_pos1+i], dstW, src1[src_pos1+i], instance->filter, instance->filter_pos, instance->filter_size);
190 c->hcScale(c, (uint16_t*)dst2[dst_pos2+i], dstW, src2[src_pos2+i], instance->filter, instance->filter_pos, instance->filter_size);
193 if (c->chrConvertRange)
194 c->chrConvertRange((uint16_t*)dst1[dst_pos1+i], (uint16_t*)dst2[dst_pos2+i], dstW);
196 desc->dst->plane[1].sliceH += 1;
197 desc->dst->plane[2].sliceH += 1;
202 static int chr_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
204 int srcW = AV_CEIL_RSHIFT(desc->src->width, desc->src->h_chr_sub_sample);
205 ColorContext * instance = desc->instance;
206 uint32_t * pal = instance->pal;
208 int sp0 = (sliceY - (desc->src->plane[0].sliceY >> desc->src->v_chr_sub_sample)) << desc->src->v_chr_sub_sample;
209 int sp1 = sliceY - desc->src->plane[1].sliceY;
213 desc->dst->plane[1].sliceY = sliceY;
214 desc->dst->plane[1].sliceH = sliceH;
215 desc->dst->plane[2].sliceY = sliceY;
216 desc->dst->plane[2].sliceH = sliceH;
218 for (i = 0; i < sliceH; ++i) {
219 const uint8_t * src[4] = { desc->src->plane[0].line[sp0+i],
220 desc->src->plane[1].line[sp1+i],
221 desc->src->plane[2].line[sp1+i],
222 desc->src->plane[3].line[sp0+i]};
224 uint8_t * dst1 = desc->dst->plane[1].line[i];
225 uint8_t * dst2 = desc->dst->plane[2].line[i];
227 c->chrToYV12(dst1, dst2, src[0], src[1], src[2], srcW, pal);
228 } else if (c->readChrPlanar) {
229 c->readChrPlanar(dst1, dst2, src, srcW, c->input_rgb2yuv_table);
235 int ff_init_desc_cfmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal)
237 ColorContext * li = av_malloc(sizeof(ColorContext));
239 return AVERROR(ENOMEM);
245 desc->process = &chr_convert;
250 int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc)
252 FilterContext *li = av_malloc(sizeof(FilterContext));
254 return AVERROR(ENOMEM);
257 li->filter_pos = filter_pos;
258 li->filter_size = filter_size;
263 desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
267 desc->process = &chr_h_scale;
272 static int no_chr_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
274 desc->dst->plane[1].sliceY = sliceY + sliceH - desc->dst->plane[1].available_lines;
275 desc->dst->plane[1].sliceH = desc->dst->plane[1].available_lines;
276 desc->dst->plane[2].sliceY = sliceY + sliceH - desc->dst->plane[2].available_lines;
277 desc->dst->plane[2].sliceH = desc->dst->plane[2].available_lines;
281 int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst)
286 desc->instance = NULL;
287 desc->process = &no_chr_scale;