/* * Copyright (c) 2010 Niel van der Westhuizen <nielkie@gmail.com> * Copyright (c) 2002 A'rpi * Copyright (c) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com ) * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU 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 * Super 2xSaI video filter * Ported from MPlayer libmpcodecs/vf_2xsai.c. */ #include "libavutil/pixdesc.h" #include "libavutil/intreadwrite.h" #include "avfilter.h" #include "formats.h" #include "internal.h" #include "video.h" typedef struct Super2xSaIContext { /* masks used for two pixels interpolation */ uint32_t hi_pixel_mask; uint32_t lo_pixel_mask; /* masks used for four pixels interpolation */ uint32_t q_hi_pixel_mask; uint32_t q_lo_pixel_mask; int bpp; ///< bytes per pixel, pixel stride for each (packed) pixel int is_be; } Super2xSaIContext; #define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D)) #define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask)) #define Q_INTERPOLATE(A, B, C, D) ((A & q_hi_pixel_mask) >> 2) + ((B & q_hi_pixel_mask) >> 2) + ((C & q_hi_pixel_mask) >> 2) + ((D & q_hi_pixel_mask) >> 2) \ + ((((A & q_lo_pixel_mask) + (B & q_lo_pixel_mask) + (C & q_lo_pixel_mask) + (D & q_lo_pixel_mask)) >> 2) & q_lo_pixel_mask) static void super2xsai(AVFilterContext *ctx, uint8_t *src, int src_linesize, uint8_t *dst, int dst_linesize, int width, int height) { Super2xSaIContext *s = ctx->priv; unsigned int x, y; uint32_t color[4][4]; unsigned char *src_line[4]; const int bpp = s->bpp; const uint32_t hi_pixel_mask = s->hi_pixel_mask; const uint32_t lo_pixel_mask = s->lo_pixel_mask; const uint32_t q_hi_pixel_mask = s->q_hi_pixel_mask; const uint32_t q_lo_pixel_mask = s->q_lo_pixel_mask; /* Point to the first 4 lines, first line is duplicated */ src_line[0] = src; src_line[1] = src; src_line[2] = src + src_linesize*FFMIN(1, height-1); src_line[3] = src + src_linesize*FFMIN(2, height-1); #define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off) #define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off) #define READ_COLOR2(dst, src_line, off) dst = s->is_be ? AV_RB16(src_line + 2 * off) : AV_RL16(src_line + 2 * off) for (y = 0; y < height; y++) { uint8_t *dst_line[2]; dst_line[0] = dst + dst_linesize*2*y; dst_line[1] = dst + dst_linesize*(2*y+1); switch (bpp) { case 4: READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2); READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2); READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2); READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2); break; case 3: READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2); READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2); READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2); READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2); break; default: READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2); READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2); READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2); READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2); } for (x = 0; x < width; x++) { uint32_t product1a, product1b, product2a, product2b; //--------------------------------------- B0 B1 B2 B3 0 1 2 3 // 4 5* 6 S2 -> 4 5* 6 7 // 1 2 3 S1 8 9 10 11 // A0 A1 A2 A3 12 13 14 15 //-------------------------------------- if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) { product2b = color[2][1]; product1b = product2b; } else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) { product2b = color[1][1]; product1b = product2b; } else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) { int r = 0; r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]); r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]); r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]); r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]); if (r > 0) product1b = color[1][2]; else if (r < 0) product1b = color[1][1]; else product1b = INTERPOLATE(color[1][1], color[1][2]); product2b = product1b; } else { if (color[1][2] == color[2][2] && color[2][2] == color[3][1] && color[2][1] != color[3][2] && color[2][2] != color[3][0]) product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]); else if (color[1][1] == color[2][1] && color[2][1] == color[3][2] && color[3][1] != color[2][2] && color[2][1] != color[3][3]) product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]); else product2b = INTERPOLATE(color[2][1], color[2][2]); if (color[1][2] == color[2][2] && color[1][2] == color[0][1] && color[1][1] != color[0][2] && color[1][2] != color[0][0]) product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]); else if (color[1][1] == color[2][1] && color[1][1] == color[0][2] && color[0][1] != color[1][2] && color[1][1] != color[0][3]) product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]); else product1b = INTERPOLATE(color[1][1], color[1][2]); } if (color[1][1] == color[2][2] && color[2][1] != color[1][2] && color[1][0] == color[1][1] && color[1][1] != color[3][2]) product2a = INTERPOLATE(color[2][1], color[1][1]); else if (color[1][1] == color[2][0] && color[1][2] == color[1][1] && color[1][0] != color[2][1] && color[1][1] != color[3][0]) product2a = INTERPOLATE(color[2][1], color[1][1]); else product2a = color[2][1]; if (color[2][1] == color[1][2] && color[1][1] != color[2][2] && color[2][0] == color[2][1] && color[2][1] != color[0][2]) product1a = INTERPOLATE(color[2][1], color[1][1]); else if (color[1][0] == color[2][1] && color[2][2] == color[2][1] && color[2][0] != color[1][1] && color[2][1] != color[0][0]) product1a = INTERPOLATE(color[2][1], color[1][1]); else product1a = color[1][1]; /* Set the calculated pixels */ switch (bpp) { case 4: AV_WN32A(dst_line[0] + x * 8, product1a); AV_WN32A(dst_line[0] + x * 8 + 4, product1b); AV_WN32A(dst_line[1] + x * 8, product2a); AV_WN32A(dst_line[1] + x * 8 + 4, product2b); break; case 3: AV_WL24(dst_line[0] + x * 6, product1a); AV_WL24(dst_line[0] + x * 6 + 3, product1b); AV_WL24(dst_line[1] + x * 6, product2a); AV_WL24(dst_line[1] + x * 6 + 3, product2b); break; default: // bpp = 2 if (s->is_be) { AV_WB32(dst_line[0] + x * 4, product1a | (product1b << 16)); AV_WB32(dst_line[1] + x * 4, product2a | (product2b << 16)); } else { AV_WL32(dst_line[0] + x * 4, product1a | (product1b << 16)); AV_WL32(dst_line[1] + x * 4, product2a | (product2b << 16)); } } /* Move color matrix forward */ color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3]; color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3]; color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3]; color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3]; if (x < width - 3) { x += 3; switch (bpp) { case 4: READ_COLOR4(color[0][3], src_line[0], x); READ_COLOR4(color[1][3], src_line[1], x); READ_COLOR4(color[2][3], src_line[2], x); READ_COLOR4(color[3][3], src_line[3], x); break; case 3: READ_COLOR3(color[0][3], src_line[0], x); READ_COLOR3(color[1][3], src_line[1], x); READ_COLOR3(color[2][3], src_line[2], x); READ_COLOR3(color[3][3], src_line[3], x); break; default: /* case 2 */ READ_COLOR2(color[0][3], src_line[0], x); READ_COLOR2(color[1][3], src_line[1], x); READ_COLOR2(color[2][3], src_line[2], x); READ_COLOR2(color[3][3], src_line[3], x); } x -= 3; } } /* We're done with one line, so we shift the source lines up */ src_line[0] = src_line[1]; src_line[1] = src_line[2]; src_line[2] = src_line[3]; /* Read next line */ src_line[3] = src_line[2]; if (y < height - 3) src_line[3] += src_linesize; } // y loop } static int query_formats(AVFilterContext *ctx) { static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB565BE, AV_PIX_FMT_BGR565BE, AV_PIX_FMT_RGB555BE, AV_PIX_FMT_BGR555BE, AV_PIX_FMT_RGB565LE, AV_PIX_FMT_BGR565LE, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_BGR555LE, AV_PIX_FMT_NONE }; AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); if (!fmts_list) return AVERROR(ENOMEM); return ff_set_common_formats(ctx, fmts_list); } static int config_input(AVFilterLink *inlink) { Super2xSaIContext *s = inlink->dst->priv; s->hi_pixel_mask = 0xFEFEFEFE; s->lo_pixel_mask = 0x01010101; s->q_hi_pixel_mask = 0xFCFCFCFC; s->q_lo_pixel_mask = 0x03030303; s->bpp = 4; switch (inlink->format) { case AV_PIX_FMT_RGB24: case AV_PIX_FMT_BGR24: s->bpp = 3; break; case AV_PIX_FMT_RGB565BE: case AV_PIX_FMT_BGR565BE: s->is_be = 1; case AV_PIX_FMT_RGB565LE: case AV_PIX_FMT_BGR565LE: s->hi_pixel_mask = 0xF7DEF7DE; s->lo_pixel_mask = 0x08210821; s->q_hi_pixel_mask = 0xE79CE79C; s->q_lo_pixel_mask = 0x18631863; s->bpp = 2; break; case AV_PIX_FMT_BGR555BE: case AV_PIX_FMT_RGB555BE: s->is_be = 1; case AV_PIX_FMT_BGR555LE: case AV_PIX_FMT_RGB555LE: s->hi_pixel_mask = 0x7BDE7BDE; s->lo_pixel_mask = 0x04210421; s->q_hi_pixel_mask = 0x739C739C; s->q_lo_pixel_mask = 0x0C630C63; s->bpp = 2; break; } return 0; } static int config_output(AVFilterLink *outlink) { AVFilterLink *inlink = outlink->src->inputs[0]; outlink->w = inlink->w*2; outlink->h = inlink->h*2; av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n", av_get_pix_fmt_name(inlink->format), inlink->w, inlink->h, outlink->w, outlink->h); return 0; } static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref) { AVFilterLink *outlink = inlink->dst->outputs[0]; AVFrame *outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h); if (!outpicref) { av_frame_free(&inpicref); return AVERROR(ENOMEM); } av_frame_copy_props(outpicref, inpicref); outpicref->width = outlink->w; outpicref->height = outlink->h; super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0], outpicref->data[0], outpicref->linesize[0], inlink->w, inlink->h); av_frame_free(&inpicref); return ff_filter_frame(outlink, outpicref); } static const AVFilterPad super2xsai_inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_input, .filter_frame = filter_frame, }, { NULL } }; static const AVFilterPad super2xsai_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_output, }, { NULL } }; AVFilter ff_vf_super2xsai = { .name = "super2xsai", .description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."), .priv_size = sizeof(Super2xSaIContext), .query_formats = query_formats, .inputs = super2xsai_inputs, .outputs = super2xsai_outputs, };