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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
00074 if (!fp->amount) {
00075 if (dst_stride == src_stride)
00076 memcpy(dst, src, src_stride * height);
00077 else
00078 for (y = 0; y < height; y++, dst += dst_stride, src += src_stride)
00079 memcpy(dst, src, width);
00080 return;
00081 }
00082
00083 for (y = 0; y < 2 * fp->steps_y; y++)
00084 memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * fp->steps_x));
00085
00086 for (y = -fp->steps_y; y < height + fp->steps_y; y++) {
00087 memset(sr, 0, sizeof(sr[0]) * (2 * fp->steps_x - 1));
00088 for (x = -fp->steps_x; x < width + fp->steps_x; x++) {
00089 tmp1 = x <= 0 ? src[0] : x >= width ? src[width-1] : src[x];
00090 for (z = 0; z < fp->steps_x * 2; z += 2) {
00091 tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1;
00092 tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2;
00093 }
00094 for (z = 0; z < fp->steps_y * 2; z += 2) {
00095 tmp2 = sc[z + 0][x + fp->steps_x] + tmp1; sc[z + 0][x + fp->steps_x] = tmp1;
00096 tmp1 = sc[z + 1][x + fp->steps_x] + tmp2; sc[z + 1][x + fp->steps_x] = tmp2;
00097 }
00098 if (x >= fp->steps_x && y >= fp->steps_y) {
00099 uint8_t* srx = src - fp->steps_y * src_stride + x - fp->steps_x;
00100 uint8_t* dsx = dst - fp->steps_y * dst_stride + x - fp->steps_x;
00101
00102 res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + fp->halfscale) >> fp->scalebits)) * fp->amount) >> 16);
00103 *dsx = av_clip_uint8(res);
00104 }
00105 }
00106 if (y >= 0) {
00107 dst += dst_stride;
00108 src += src_stride;
00109 }
00110 }
00111 }
00112
00113 static void set_filter_param(FilterParam *fp, int msize_x, int msize_y, double amount)
00114 {
00115 fp->msize_x = msize_x;
00116 fp->msize_y = msize_y;
00117 fp->amount = amount * 65536.0;
00118
00119 fp->steps_x = msize_x / 2;
00120 fp->steps_y = msize_y / 2;
00121 fp->scalebits = (fp->steps_x + fp->steps_y) * 2;
00122 fp->halfscale = 1 << (fp->scalebits - 1);
00123 }
00124
00125 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
00126 {
00127 UnsharpContext *unsharp = ctx->priv;
00128 int lmsize_x = 5, cmsize_x = 0;
00129 int lmsize_y = 5, cmsize_y = 0;
00130 double lamount = 1.0f, camount = 0.0f;
00131
00132 if (args)
00133 sscanf(args, "%d:%d:%lf:%d:%d:%lf", &lmsize_x, &lmsize_y, &lamount,
00134 &cmsize_x, &cmsize_y, &camount);
00135
00136 if ((lamount && (lmsize_x < 2 || lmsize_y < 2)) ||
00137 (camount && (cmsize_x < 2 || cmsize_y < 2))) {
00138 av_log(ctx, AV_LOG_ERROR,
00139 "Invalid value <2 for lmsize_x:%d or lmsize_y:%d or cmsize_x:%d or cmsize_y:%d\n",
00140 lmsize_x, lmsize_y, cmsize_x, cmsize_y);
00141 return AVERROR(EINVAL);
00142 }
00143
00144 set_filter_param(&unsharp->luma, lmsize_x, lmsize_y, lamount);
00145 set_filter_param(&unsharp->chroma, cmsize_x, cmsize_y, camount);
00146
00147 return 0;
00148 }
00149
00150 static int query_formats(AVFilterContext *ctx)
00151 {
00152 enum PixelFormat pix_fmts[] = {
00153 PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_YUV410P,
00154 PIX_FMT_YUV411P, PIX_FMT_YUV440P, PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P,
00155 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ440P, PIX_FMT_NONE
00156 };
00157
00158 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
00159
00160 return 0;
00161 }
00162
00163 static void init_filter_param(AVFilterContext *ctx, FilterParam *fp, const char *effect_type, int width)
00164 {
00165 int z;
00166 const char *effect;
00167
00168 effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen";
00169
00170 av_log(ctx, AV_LOG_INFO, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n",
00171 effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0);
00172
00173 for (z = 0; z < 2 * fp->steps_y; z++)
00174 fp->sc[z] = av_malloc(sizeof(*(fp->sc[z])) * (width + 2 * fp->steps_x));
00175 }
00176
00177 static int config_props(AVFilterLink *link)
00178 {
00179 UnsharpContext *unsharp = link->dst->priv;
00180
00181 init_filter_param(link->dst, &unsharp->luma, "luma", link->w);
00182 init_filter_param(link->dst, &unsharp->chroma, "chroma", CHROMA_WIDTH(link));
00183
00184 return 0;
00185 }
00186
00187 static void free_filter_param(FilterParam *fp)
00188 {
00189 int z;
00190
00191 for (z = 0; z < 2 * fp->steps_y; z++)
00192 av_free(fp->sc[z]);
00193 }
00194
00195 static av_cold void uninit(AVFilterContext *ctx)
00196 {
00197 UnsharpContext *unsharp = ctx->priv;
00198
00199 free_filter_param(&unsharp->luma);
00200 free_filter_param(&unsharp->chroma);
00201 }
00202
00203 static void end_frame(AVFilterLink *link)
00204 {
00205 UnsharpContext *unsharp = link->dst->priv;
00206 AVFilterBufferRef *in = link->cur_buf;
00207 AVFilterBufferRef *out = link->dst->outputs[0]->out_buf;
00208
00209 unsharpen(out->data[0], in->data[0], out->linesize[0], in->linesize[0], link->w, link->h, &unsharp->luma);
00210 unsharpen(out->data[1], in->data[1], out->linesize[1], in->linesize[1], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma);
00211 unsharpen(out->data[2], in->data[2], out->linesize[2], in->linesize[2], CHROMA_WIDTH(link), CHROMA_HEIGHT(link), &unsharp->chroma);
00212
00213 avfilter_unref_buffer(in);
00214 avfilter_draw_slice(link->dst->outputs[0], 0, link->h, 1);
00215 avfilter_end_frame(link->dst->outputs[0]);
00216 avfilter_unref_buffer(out);
00217 }
00218
00219 static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
00220 {
00221 }
00222
00223 AVFilter avfilter_vf_unsharp = {
00224 .name = "unsharp",
00225 .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
00226
00227 .priv_size = sizeof(UnsharpContext),
00228
00229 .init = init,
00230 .uninit = uninit,
00231 .query_formats = query_formats,
00232
00233 .inputs = (AVFilterPad[]) {{ .name = "default",
00234 .type = AVMEDIA_TYPE_VIDEO,
00235 .draw_slice = draw_slice,
00236 .end_frame = end_frame,
00237 .config_props = config_props,
00238 .min_perms = AV_PERM_READ, },
00239 { .name = NULL}},
00240
00241 .outputs = (AVFilterPad[]) {{ .name = "default",
00242 .type = AVMEDIA_TYPE_VIDEO, },
00243 { .name = NULL}},
00244 };