| /* |
| * 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, |
| }; |
