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00029 #include "libavutil/pixdesc.h"
00030 #include "libavutil/intreadwrite.h"
00031 #include "avfilter.h"
00032 #include "formats.h"
00033 #include "internal.h"
00034 #include "video.h"
00035
00036 typedef struct {
00037
00038 uint32_t hi_pixel_mask;
00039 uint32_t lo_pixel_mask;
00040
00041
00042 uint32_t q_hi_pixel_mask;
00043 uint32_t q_lo_pixel_mask;
00044
00045 int bpp;
00046 int is_be;
00047 } Super2xSaIContext;
00048
00049 #define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
00050
00051 #define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask))
00052
00053 #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) \
00054 + ((((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)
00055
00056 static void super2xsai(AVFilterContext *ctx,
00057 uint8_t *src, int src_linesize,
00058 uint8_t *dst, int dst_linesize,
00059 int width, int height)
00060 {
00061 Super2xSaIContext *sai = ctx->priv;
00062 unsigned int x, y;
00063 uint32_t color[4][4];
00064 unsigned char *src_line[4];
00065 const int bpp = sai->bpp;
00066 const uint32_t hi_pixel_mask = sai->hi_pixel_mask;
00067 const uint32_t lo_pixel_mask = sai->lo_pixel_mask;
00068 const uint32_t q_hi_pixel_mask = sai->q_hi_pixel_mask;
00069 const uint32_t q_lo_pixel_mask = sai->q_lo_pixel_mask;
00070
00071
00072 src_line[0] = src;
00073 src_line[1] = src;
00074 src_line[2] = src + src_linesize*FFMIN(1, height-1);
00075 src_line[3] = src + src_linesize*FFMIN(2, height-1);
00076
00077 #define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off)
00078 #define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off)
00079 #define READ_COLOR2(dst, src_line, off) dst = sai->is_be ? AV_RB16(src_line + 2 * off) : AV_RL16(src_line + 2 * off)
00080
00081 for (y = 0; y < height; y++) {
00082 uint8_t *dst_line[2];
00083
00084 dst_line[0] = dst + dst_linesize*2*y;
00085 dst_line[1] = dst + dst_linesize*(2*y+1);
00086
00087 switch (bpp) {
00088 case 4:
00089 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);
00090 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);
00091 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);
00092 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);
00093 break;
00094 case 3:
00095 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);
00096 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);
00097 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);
00098 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);
00099 break;
00100 default:
00101 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);
00102 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);
00103 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);
00104 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);
00105 }
00106
00107 for (x = 0; x < width; x++) {
00108 uint32_t product1a, product1b, product2a, product2b;
00109
00110
00111
00112
00113
00114
00115 if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) {
00116 product2b = color[2][1];
00117 product1b = product2b;
00118 } else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) {
00119 product2b = color[1][1];
00120 product1b = product2b;
00121 } else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) {
00122 int r = 0;
00123
00124 r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]);
00125 r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]);
00126 r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]);
00127 r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]);
00128
00129 if (r > 0)
00130 product1b = color[1][2];
00131 else if (r < 0)
00132 product1b = color[1][1];
00133 else
00134 product1b = INTERPOLATE(color[1][1], color[1][2]);
00135
00136 product2b = product1b;
00137 } else {
00138 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])
00139 product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]);
00140 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])
00141 product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]);
00142 else
00143 product2b = INTERPOLATE(color[2][1], color[2][2]);
00144
00145 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])
00146 product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]);
00147 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])
00148 product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]);
00149 else
00150 product1b = INTERPOLATE(color[1][1], color[1][2]);
00151 }
00152
00153 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])
00154 product2a = INTERPOLATE(color[2][1], color[1][1]);
00155 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])
00156 product2a = INTERPOLATE(color[2][1], color[1][1]);
00157 else
00158 product2a = color[2][1];
00159
00160 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])
00161 product1a = INTERPOLATE(color[2][1], color[1][1]);
00162 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])
00163 product1a = INTERPOLATE(color[2][1], color[1][1]);
00164 else
00165 product1a = color[1][1];
00166
00167
00168 switch (bpp) {
00169 case 4:
00170 AV_WN32A(dst_line[0] + x * 8, product1a);
00171 AV_WN32A(dst_line[0] + x * 8 + 4, product1b);
00172 AV_WN32A(dst_line[1] + x * 8, product2a);
00173 AV_WN32A(dst_line[1] + x * 8 + 4, product2b);
00174 break;
00175 case 3:
00176 AV_WL24(dst_line[0] + x * 6, product1a);
00177 AV_WL24(dst_line[0] + x * 6 + 3, product1b);
00178 AV_WL24(dst_line[1] + x * 6, product2a);
00179 AV_WL24(dst_line[1] + x * 6 + 3, product2b);
00180 break;
00181 default:
00182 if (sai->is_be) {
00183 AV_WB32(dst_line[0] + x * 4, product1a | (product1b << 16));
00184 AV_WB32(dst_line[1] + x * 4, product2a | (product2b << 16));
00185 } else {
00186 AV_WL32(dst_line[0] + x * 4, product1a | (product1b << 16));
00187 AV_WL32(dst_line[1] + x * 4, product2a | (product2b << 16));
00188 }
00189 }
00190
00191
00192 color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3];
00193 color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3];
00194 color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3];
00195 color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3];
00196
00197 if (x < width - 3) {
00198 x += 3;
00199 switch (bpp) {
00200 case 4:
00201 READ_COLOR4(color[0][3], src_line[0], x);
00202 READ_COLOR4(color[1][3], src_line[1], x);
00203 READ_COLOR4(color[2][3], src_line[2], x);
00204 READ_COLOR4(color[3][3], src_line[3], x);
00205 break;
00206 case 3:
00207 READ_COLOR3(color[0][3], src_line[0], x);
00208 READ_COLOR3(color[1][3], src_line[1], x);
00209 READ_COLOR3(color[2][3], src_line[2], x);
00210 READ_COLOR3(color[3][3], src_line[3], x);
00211 break;
00212 default:
00213 READ_COLOR2(color[0][3], src_line[0], x);
00214 READ_COLOR2(color[1][3], src_line[1], x);
00215 READ_COLOR2(color[2][3], src_line[2], x);
00216 READ_COLOR2(color[3][3], src_line[3], x);
00217 }
00218 x -= 3;
00219 }
00220 }
00221
00222
00223 src_line[0] = src_line[1];
00224 src_line[1] = src_line[2];
00225 src_line[2] = src_line[3];
00226
00227
00228 src_line[3] = src_line[2];
00229 if (y < height - 3)
00230 src_line[3] += src_linesize;
00231 }
00232 }
00233
00234 static int query_formats(AVFilterContext *ctx)
00235 {
00236 static const enum AVPixelFormat pix_fmts[] = {
00237 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
00238 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
00239 AV_PIX_FMT_RGB565BE, AV_PIX_FMT_BGR565BE, AV_PIX_FMT_RGB555BE, AV_PIX_FMT_BGR555BE,
00240 AV_PIX_FMT_RGB565LE, AV_PIX_FMT_BGR565LE, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_BGR555LE,
00241 AV_PIX_FMT_NONE
00242 };
00243
00244 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
00245 return 0;
00246 }
00247
00248 static int config_input(AVFilterLink *inlink)
00249 {
00250 Super2xSaIContext *sai = inlink->dst->priv;
00251
00252 sai->hi_pixel_mask = 0xFEFEFEFE;
00253 sai->lo_pixel_mask = 0x01010101;
00254 sai->q_hi_pixel_mask = 0xFCFCFCFC;
00255 sai->q_lo_pixel_mask = 0x03030303;
00256 sai->bpp = 4;
00257
00258 switch (inlink->format) {
00259 case AV_PIX_FMT_RGB24:
00260 case AV_PIX_FMT_BGR24:
00261 sai->bpp = 3;
00262 break;
00263
00264 case AV_PIX_FMT_RGB565BE:
00265 case AV_PIX_FMT_BGR565BE:
00266 sai->is_be = 1;
00267 case AV_PIX_FMT_RGB565LE:
00268 case AV_PIX_FMT_BGR565LE:
00269 sai->hi_pixel_mask = 0xF7DEF7DE;
00270 sai->lo_pixel_mask = 0x08210821;
00271 sai->q_hi_pixel_mask = 0xE79CE79C;
00272 sai->q_lo_pixel_mask = 0x18631863;
00273 sai->bpp = 2;
00274 break;
00275
00276 case AV_PIX_FMT_BGR555BE:
00277 case AV_PIX_FMT_RGB555BE:
00278 sai->is_be = 1;
00279 case AV_PIX_FMT_BGR555LE:
00280 case AV_PIX_FMT_RGB555LE:
00281 sai->hi_pixel_mask = 0x7BDE7BDE;
00282 sai->lo_pixel_mask = 0x04210421;
00283 sai->q_hi_pixel_mask = 0x739C739C;
00284 sai->q_lo_pixel_mask = 0x0C630C63;
00285 sai->bpp = 2;
00286 break;
00287 }
00288
00289 return 0;
00290 }
00291
00292 static int config_output(AVFilterLink *outlink)
00293 {
00294 AVFilterLink *inlink = outlink->src->inputs[0];
00295
00296 outlink->w = inlink->w*2;
00297 outlink->h = inlink->h*2;
00298
00299 av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n",
00300 av_get_pix_fmt_name(inlink->format),
00301 inlink->w, inlink->h, outlink->w, outlink->h);
00302
00303 return 0;
00304 }
00305
00306 static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
00307 {
00308 AVFilterLink *outlink = inlink->dst->outputs[0];
00309 AVFilterBufferRef *outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
00310 if (!outpicref) {
00311 avfilter_unref_bufferp(&inpicref);
00312 return AVERROR(ENOMEM);
00313 }
00314 avfilter_copy_buffer_ref_props(outpicref, inpicref);
00315 outpicref->video->w = outlink->w;
00316 outpicref->video->h = outlink->h;
00317
00318 super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0],
00319 outpicref->data[0], outpicref->linesize[0],
00320 inlink->w, inlink->h);
00321
00322 avfilter_unref_bufferp(&inpicref);
00323 return ff_filter_frame(outlink, outpicref);
00324 }
00325
00326 static const AVFilterPad super2xsai_inputs[] = {
00327 {
00328 .name = "default",
00329 .type = AVMEDIA_TYPE_VIDEO,
00330 .config_props = config_input,
00331 .filter_frame = filter_frame,
00332 .min_perms = AV_PERM_READ,
00333 },
00334 { NULL }
00335 };
00336
00337 static const AVFilterPad super2xsai_outputs[] = {
00338 {
00339 .name = "default",
00340 .type = AVMEDIA_TYPE_VIDEO,
00341 .config_props = config_output,
00342 },
00343 { NULL }
00344 };
00345
00346 AVFilter avfilter_vf_super2xsai = {
00347 .name = "super2xsai",
00348 .description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."),
00349 .priv_size = sizeof(Super2xSaIContext),
00350 .query_formats = query_formats,
00351 .inputs = super2xsai_inputs,
00352 .outputs = super2xsai_outputs,
00353 };