Libav 0.7.1
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00001 /* 00002 * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com> 00003 * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org> 00004 * Relicensed to the LGPL with permission from Remi Guyomarch. 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00039 #include "avfilter.h" 00040 #include "libavutil/common.h" 00041 #include "libavutil/mem.h" 00042 #include "libavutil/pixdesc.h" 00043 00044 #define MIN_SIZE 3 00045 #define MAX_SIZE 13 00046 00047 #define CHROMA_WIDTH(link) -((-link->w) >> av_pix_fmt_descriptors[link->format].log2_chroma_w) 00048 #define CHROMA_HEIGHT(link) -((-link->h) >> av_pix_fmt_descriptors[link->format].log2_chroma_h) 00049 00050 typedef struct FilterParam { 00051 int msize_x; 00052 int msize_y; 00053 int amount; 00054 int steps_x; 00055 int steps_y; 00056 int scalebits; 00057 int32_t halfscale; 00058 uint32_t *sc[(MAX_SIZE * MAX_SIZE) - 1]; 00059 } FilterParam; 00060 00061 typedef struct { 00062 FilterParam luma; 00063 FilterParam chroma; 00064 } UnsharpContext; 00065 00066 static void unsharpen(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride, int width, int height, FilterParam *fp) 00067 { 00068 uint32_t **sc = fp->sc; 00069 uint32_t sr[(MAX_SIZE * MAX_SIZE) - 1], tmp1, tmp2; 00070 00071 int32_t res; 00072 int x, y, z; 00073 const uint8_t *src2; 00074 00075 if (!fp->amount) { 00076 if (dst_stride == src_stride) 00077 memcpy(dst, src, src_stride * height); 00078 else 00079 for (y = 0; y < height; y++, dst += dst_stride, src += src_stride) 00080 memcpy(dst, src, width); 00081 return; 00082 } 00083 00084 for (y = 0; y < 2 * fp->steps_y; y++) 00085 memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * fp->steps_x)); 00086 00087 for (y = -fp->steps_y; y < height + fp->steps_y; y++) { 00088 if (y < height) 00089 src2 = src; 00090 00091 memset(sr, 0, sizeof(sr[0]) * (2 * fp->steps_x - 1)); 00092 for (x = -fp->steps_x; x < width + fp->steps_x; x++) { 00093 tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; 00094 for (z = 0; z < fp->steps_x * 2; z += 2) { 00095 tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1; 00096 tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2; 00097 } 00098 for (z = 0; z < fp->steps_y * 2; z += 2) { 00099 tmp2 = sc[z + 0][x + fp->steps_x] + tmp1; sc[z + 0][x + fp->steps_x] = tmp1; 00100 tmp1 = sc[z + 1][x + fp->steps_x] + tmp2; sc[z + 1][x + fp->steps_x] = tmp2; 00101 } 00102 if (x >= fp->steps_x && y >= fp->steps_y) { 00103 uint8_t* srx = src - fp->steps_y * src_stride + x - fp->steps_x; 00104 uint8_t* dsx = dst - fp->steps_y * dst_stride + x - fp->steps_x; 00105 00106 res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + fp->halfscale) >> fp->scalebits)) * fp->amount) >> 16); 00107 *dsx = av_clip_uint8(res); 00108 } 00109 } 00110 if (y >= 0) { 00111 dst += dst_stride; 00112 src += src_stride; 00113 } 00114 } 00115 } 00116 00117 static void set_filter_param(FilterParam *fp, int msize_x, int msize_y, double amount) 00118 { 00119 fp->msize_x = msize_x; 00120 fp->msize_y = msize_y; 00121 fp->amount = amount * 65536.0; 00122 00123 fp->steps_x = msize_x / 2; 00124 fp->steps_y = msize_y / 2; 00125 fp->scalebits = (fp->steps_x + fp->steps_y) * 2; 00126 fp->halfscale = 1 << (fp->scalebits - 1); 00127 } 00128 00129 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) 00130 { 00131 UnsharpContext *unsharp = ctx->priv; 00132 int lmsize_x = 5, cmsize_x = 0; 00133 int lmsize_y = 5, cmsize_y = 0; 00134 double lamount = 1.0f, camount = 0.0f; 00135 00136 if (args) 00137 sscanf(args, "%d:%d:%lf:%d:%d:%lf", &lmsize_x, &lmsize_y, &lamount, 00138 &cmsize_x, &cmsize_y, &camount); 00139 00140 if ((lamount && (lmsize_x < 2 || lmsize_y < 2)) || 00141 (camount && (cmsize_x < 2 || cmsize_y < 2))) { 00142 av_log(ctx, AV_LOG_ERROR, 00143 "Invalid value <2 for lmsize_x:%d or lmsize_y:%d or cmsize_x:%d or cmsize_y:%d\n", 00144 lmsize_x, lmsize_y, cmsize_x, cmsize_y); 00145 return AVERROR(EINVAL); 00146 } 00147 00148 set_filter_param(&unsharp->luma, lmsize_x, lmsize_y, lamount); 00149 set_filter_param(&unsharp->chroma, cmsize_x, cmsize_y, camount); 00150 00151 return 0; 00152 } 00153 00154 static int query_formats(AVFilterContext *ctx) 00155 { 00156 enum PixelFormat pix_fmts[] = { 00157 PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_YUV410P, 00158 PIX_FMT_YUV411P, PIX_FMT_YUV440P, PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, 00159 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ440P, PIX_FMT_NONE 00160 }; 00161 00162 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts)); 00163 00164 return 0; 00165 } 00166 00167 static void init_filter_param(AVFilterContext *ctx, FilterParam *fp, const char *effect_type, int width) 00168 { 00169 int z; 00170 const char *effect; 00171 00172 effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; 00173 00174 av_log(ctx, AV_LOG_INFO, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", 00175 effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); 00176 00177 for (z = 0; z < 2 * fp->steps_y; z++) 00178 fp->sc[z] = av_malloc(sizeof(*(fp->sc[z])) * (width + 2 * fp->steps_x)); 00179 } 00180 00181 static int config_props(AVFilterLink *link) 00182 { 00183 UnsharpContext *unsharp = link->dst->priv; 00184 00185 init_filter_param(link->dst, &unsharp->luma, "luma", link->w); 00186 init_filter_param(link->dst, &unsharp->chroma, "chroma", CHROMA_WIDTH(link)); 00187 00188 return 0; 00189 } 00190 00191 static void free_filter_param(FilterParam *fp) 00192 { 00193 int z; 00194 00195 for (z = 0; z < 2 * fp->steps_y; z++) 00196 av_free(fp->sc[z]); 00197 } 00198 00199 static av_cold void uninit(AVFilterContext *ctx) 00200 { 00201 UnsharpContext *unsharp = ctx->priv; 00202 00203 free_filter_param(&unsharp->luma); 00204 free_filter_param(&unsharp->chroma); 00205 } 00206 00207 static void end_frame(AVFilterLink *link) 00208 { 00209 UnsharpContext *unsharp = link->dst->priv; 00210 AVFilterBufferRef *in = link->cur_buf; 00211 AVFilterBufferRef *out = link->dst->outputs[0]->out_buf; 00212 00213 unsharpen(out->data[0], in->data[0], out->linesize[0], in->linesize[0], link->w, link->h, &unsharp->luma); 00214 unsharpen(out->data[1], in->data[1], out->linesize[1], in->linesize[1], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma); 00215 unsharpen(out->data[2], in->data[2], out->linesize[2], in->linesize[2], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma); 00216 00217 avfilter_unref_buffer(in); 00218 avfilter_draw_slice(link->dst->outputs[0], 0, link->h, 1); 00219 avfilter_end_frame(link->dst->outputs[0]); 00220 avfilter_unref_buffer(out); 00221 } 00222 00223 static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir) 00224 { 00225 } 00226 00227 AVFilter avfilter_vf_unsharp = { 00228 .name = "unsharp", 00229 .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), 00230 00231 .priv_size = sizeof(UnsharpContext), 00232 00233 .init = init, 00234 .uninit = uninit, 00235 .query_formats = query_formats, 00236 00237 .inputs = (AVFilterPad[]) {{ .name = "default", 00238 .type = AVMEDIA_TYPE_VIDEO, 00239 .draw_slice = draw_slice, 00240 .end_frame = end_frame, 00241 .config_props = config_props, 00242 .min_perms = AV_PERM_READ, }, 00243 { .name = NULL}}, 00244 00245 .outputs = (AVFilterPad[]) {{ .name = "default", 00246 .type = AVMEDIA_TYPE_VIDEO, }, 00247 { .name = NULL}}, 00248 };