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00027 #include "avfilter.h"
00028 #include "libavutil/pixdesc.h"
00029 #include "libavutil/colorspace.h"
00030 #include "libavutil/avassert.h"
00031 #include "libavutil/imgutils.h"
00032 #include "libavutil/parseutils.h"
00033 #include "drawutils.h"
00034
00035 static int query_formats(AVFilterContext *ctx)
00036 {
00037 static const enum PixelFormat pix_fmts[] = {
00038 PIX_FMT_ARGB, PIX_FMT_RGBA,
00039 PIX_FMT_ABGR, PIX_FMT_BGRA,
00040 PIX_FMT_RGB24, PIX_FMT_BGR24,
00041
00042 PIX_FMT_YUV444P, PIX_FMT_YUV422P,
00043 PIX_FMT_YUV420P, PIX_FMT_YUV411P,
00044 PIX_FMT_YUV410P, PIX_FMT_YUV440P,
00045 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
00046 PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P,
00047 PIX_FMT_YUVA420P,
00048
00049 PIX_FMT_NONE
00050 };
00051
00052 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
00053 return 0;
00054 }
00055
00056 typedef struct {
00057 int w, h;
00058 int x, y;
00059 int in_w, in_h;
00060
00061 uint8_t color[4];
00062 uint8_t *line[4];
00063 int line_step[4];
00064 int hsub, vsub;
00065 int needs_copy;
00066 } PadContext;
00067
00068 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
00069 {
00070 PadContext *pad = ctx->priv;
00071 char color_string[128] = "black";
00072
00073 if (args)
00074 sscanf(args, "%d:%d:%d:%d:%s", &pad->w, &pad->h, &pad->x, &pad->y, color_string);
00075
00076 if (av_parse_color(pad->color, color_string, -1, ctx) < 0)
00077 return AVERROR(EINVAL);
00078
00079
00080 if (pad->w < 0 || pad->h < 0) {
00081 av_log(ctx, AV_LOG_ERROR, "Negative size values are not acceptable.\n");
00082 return AVERROR(EINVAL);
00083 }
00084
00085 return 0;
00086 }
00087
00088 static av_cold void uninit(AVFilterContext *ctx)
00089 {
00090 PadContext *pad = ctx->priv;
00091 int i;
00092
00093 for (i = 0; i < 4; i++) {
00094 av_freep(&pad->line[i]);
00095 pad->line_step[i] = 0;
00096 }
00097 }
00098
00099 static int config_input(AVFilterLink *inlink)
00100 {
00101 AVFilterContext *ctx = inlink->dst;
00102 PadContext *pad = ctx->priv;
00103 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
00104 uint8_t rgba_color[4];
00105 int is_packed_rgba;
00106
00107 pad->hsub = pix_desc->log2_chroma_w;
00108 pad->vsub = pix_desc->log2_chroma_h;
00109
00110 if (!pad->w)
00111 pad->w = inlink->w;
00112 if (!pad->h)
00113 pad->h = inlink->h;
00114
00115 pad->w &= ~((1 << pad->hsub) - 1);
00116 pad->h &= ~((1 << pad->vsub) - 1);
00117 pad->x &= ~((1 << pad->hsub) - 1);
00118 pad->y &= ~((1 << pad->vsub) - 1);
00119
00120 pad->in_w = inlink->w & ~((1 << pad->hsub) - 1);
00121 pad->in_h = inlink->h & ~((1 << pad->vsub) - 1);
00122
00123 memcpy(rgba_color, pad->color, sizeof(rgba_color));
00124 ff_fill_line_with_color(pad->line, pad->line_step, pad->w, pad->color,
00125 inlink->format, rgba_color, &is_packed_rgba, NULL);
00126
00127 av_log(ctx, AV_LOG_INFO, "w:%d h:%d -> w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X[%s]\n",
00128 inlink->w, inlink->h, pad->w, pad->h, pad->x, pad->y,
00129 pad->color[0], pad->color[1], pad->color[2], pad->color[3],
00130 is_packed_rgba ? "rgba" : "yuva");
00131
00132 if (pad->x < 0 || pad->y < 0 ||
00133 pad->w <= 0 || pad->h <= 0 ||
00134 (unsigned)pad->x + (unsigned)inlink->w > pad->w ||
00135 (unsigned)pad->y + (unsigned)inlink->h > pad->h) {
00136 av_log(ctx, AV_LOG_ERROR,
00137 "Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
00138 pad->x, pad->y, pad->x + inlink->w, pad->y + inlink->h, pad->w, pad->h);
00139 return AVERROR(EINVAL);
00140 }
00141
00142 return 0;
00143 }
00144
00145 static int config_output(AVFilterLink *outlink)
00146 {
00147 PadContext *pad = outlink->src->priv;
00148
00149 outlink->w = pad->w;
00150 outlink->h = pad->h;
00151 return 0;
00152 }
00153
00154 static AVFilterBufferRef *get_video_buffer(AVFilterLink *inlink, int perms, int w, int h)
00155 {
00156 PadContext *pad = inlink->dst->priv;
00157
00158 AVFilterBufferRef *picref = avfilter_get_video_buffer(inlink->dst->outputs[0], perms,
00159 w + (pad->w - pad->in_w),
00160 h + (pad->h - pad->in_h));
00161 int plane;
00162
00163 picref->video->w = w;
00164 picref->video->h = h;
00165
00166 for (plane = 0; plane < 4 && picref->data[plane]; plane++) {
00167 int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0;
00168 int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0;
00169
00170 picref->data[plane] += (pad->x >> hsub) * pad->line_step[plane] +
00171 (pad->y >> vsub) * picref->linesize[plane];
00172 }
00173
00174 return picref;
00175 }
00176
00177 static int does_clip(PadContext *pad, AVFilterBufferRef *outpicref, int plane, int hsub, int vsub, int x, int y)
00178 {
00179 int64_t x_in_buf, y_in_buf;
00180
00181 x_in_buf = outpicref->data[plane] - outpicref->buf->data[plane]
00182 + (x >> hsub) * pad ->line_step[plane]
00183 + (y >> vsub) * outpicref->linesize [plane];
00184
00185 if(x_in_buf < 0 || x_in_buf % pad->line_step[plane])
00186 return 1;
00187 x_in_buf /= pad->line_step[plane];
00188
00189 av_assert0(outpicref->buf->linesize[plane]>0);
00190
00191 y_in_buf = x_in_buf / outpicref->buf->linesize[plane];
00192 x_in_buf %= outpicref->buf->linesize[plane];
00193
00194 if( y_in_buf<<vsub >= outpicref->buf->h
00195 || x_in_buf<<hsub >= outpicref->buf->w)
00196 return 1;
00197 return 0;
00198 }
00199
00200 static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
00201 {
00202 PadContext *pad = inlink->dst->priv;
00203 AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0);
00204 int plane;
00205
00206 for (plane = 0; plane < 4 && outpicref->data[plane]; plane++) {
00207 int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0;
00208 int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0;
00209
00210 av_assert0(outpicref->buf->w>0 && outpicref->buf->h>0);
00211
00212 if(outpicref->format != outpicref->buf->format)
00213 break;
00214
00215 outpicref->data[plane] -= (pad->x >> hsub) * pad ->line_step[plane]
00216 + (pad->y >> vsub) * outpicref->linesize [plane];
00217
00218 if( does_clip(pad, outpicref, plane, hsub, vsub, 0, 0)
00219 || does_clip(pad, outpicref, plane, hsub, vsub, 0, pad->h-1)
00220 || does_clip(pad, outpicref, plane, hsub, vsub, pad->w-1, 0)
00221 || does_clip(pad, outpicref, plane, hsub, vsub, pad->w-1, pad->h-1)
00222 )
00223 break;
00224 }
00225 pad->needs_copy= plane < 4 && outpicref->data[plane];
00226 if(pad->needs_copy){
00227 av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
00228 avfilter_unref_buffer(outpicref);
00229 outpicref = avfilter_get_video_buffer(inlink->dst->outputs[0], AV_PERM_WRITE | AV_PERM_NEG_LINESIZES,
00230 FFMAX(inlink->w, pad->w),
00231 FFMAX(inlink->h, pad->h));
00232 avfilter_copy_buffer_ref_props(outpicref, inpicref);
00233 }
00234
00235 inlink->dst->outputs[0]->out_buf = outpicref;
00236
00237 outpicref->video->w = pad->w;
00238 outpicref->video->h = pad->h;
00239
00240 avfilter_start_frame(inlink->dst->outputs[0], outpicref);
00241 }
00242
00243 static void end_frame(AVFilterLink *link)
00244 {
00245 avfilter_end_frame(link->dst->outputs[0]);
00246 avfilter_unref_buffer(link->cur_buf);
00247 }
00248
00249 static void draw_send_bar_slice(AVFilterLink *link, int y, int h, int slice_dir, int before_slice)
00250 {
00251 PadContext *pad = link->dst->priv;
00252 int bar_y, bar_h = 0;
00253
00254 if (slice_dir * before_slice == 1 && y == pad->y) {
00255
00256 bar_y = 0;
00257 bar_h = pad->y;
00258 } else if (slice_dir * before_slice == -1 && (y + h) == (pad->y + pad->in_h)) {
00259
00260 bar_y = pad->y + pad->in_h;
00261 bar_h = pad->h - pad->in_h - pad->y;
00262 }
00263
00264 if (bar_h) {
00265 ff_draw_rectangle(link->dst->outputs[0]->out_buf->data,
00266 link->dst->outputs[0]->out_buf->linesize,
00267 pad->line, pad->line_step, pad->hsub, pad->vsub,
00268 0, bar_y, pad->w, bar_h);
00269 avfilter_draw_slice(link->dst->outputs[0], bar_y, bar_h, slice_dir);
00270 }
00271 }
00272
00273 static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
00274 {
00275 PadContext *pad = link->dst->priv;
00276 AVFilterBufferRef *outpic = link->dst->outputs[0]->out_buf;
00277 AVFilterBufferRef *inpic = link->cur_buf;
00278
00279 y += pad->y;
00280
00281 y &= ~((1 << pad->vsub) - 1);
00282 h &= ~((1 << pad->vsub) - 1);
00283
00284 if (!h)
00285 return;
00286 draw_send_bar_slice(link, y, h, slice_dir, 1);
00287
00288
00289 ff_draw_rectangle(outpic->data, outpic->linesize, pad->line, pad->line_step,
00290 pad->hsub, pad->vsub, 0, y, pad->x, h);
00291
00292 if(pad->needs_copy){
00293 ff_copy_rectangle(outpic->data, outpic->linesize,
00294 inpic->data, inpic->linesize, pad->line_step,
00295 pad->hsub, pad->vsub,
00296 pad->x, y, y-pad->y, inpic->video->w, h);
00297 }
00298
00299
00300 ff_draw_rectangle(outpic->data, outpic->linesize,
00301 pad->line, pad->line_step, pad->hsub, pad->vsub,
00302 pad->x + pad->in_w, y, pad->w - pad->x - pad->in_w, h);
00303 avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
00304
00305 draw_send_bar_slice(link, y, h, slice_dir, -1);
00306 }
00307
00308 AVFilter avfilter_vf_pad = {
00309 .name = "pad",
00310 .description = NULL_IF_CONFIG_SMALL("Pad input image to width:height[:x:y[:color]] (default x and y: 0, default color: black)."),
00311
00312 .priv_size = sizeof(PadContext),
00313 .init = init,
00314 .uninit = uninit,
00315 .query_formats = query_formats,
00316
00317 .inputs = (AVFilterPad[]) {{ .name = "default",
00318 .type = AVMEDIA_TYPE_VIDEO,
00319 .config_props = config_input,
00320 .get_video_buffer = get_video_buffer,
00321 .start_frame = start_frame,
00322 .draw_slice = draw_slice,
00323 .end_frame = end_frame, },
00324 { .name = NULL}},
00325
00326 .outputs = (AVFilterPad[]) {{ .name = "default",
00327 .type = AVMEDIA_TYPE_VIDEO,
00328 .config_props = config_output, },
00329 { .name = NULL}},
00330 };