libavfilter/vsrc_testsrc.c
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00001 /*
00002  * Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
00003  * Copyright (c) 2011 Stefano Sabatini
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00033 #include <float.h>
00034 
00035 #include "libavutil/mathematics.h"
00036 #include "libavutil/opt.h"
00037 #include "libavutil/intreadwrite.h"
00038 #include "libavutil/parseutils.h"
00039 #include "avfilter.h"
00040 
00041 typedef struct {
00042     const AVClass *class;
00043     int h, w;
00044     unsigned int nb_frame;
00045     AVRational time_base;
00046     int64_t pts, max_pts;
00047     char *size;                 
00048     char *rate;                 
00049     char *duration;             
00050     AVRational sar;             
00051 
00052     void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
00053 
00054     /* only used by rgbtest */
00055     int rgba_map[4];
00056 } TestSourceContext;
00057 
00058 #define OFFSET(x) offsetof(TestSourceContext, x)
00059 
00060 static const AVOption testsrc_options[] = {
00061     { "size",     "set video size",     OFFSET(size),     FF_OPT_TYPE_STRING, {.str = "320x240"}},
00062     { "s",        "set video size",     OFFSET(size),     FF_OPT_TYPE_STRING, {.str = "320x240"}},
00063     { "rate",     "set video rate",     OFFSET(rate),     FF_OPT_TYPE_STRING, {.str = "25"},    },
00064     { "r",        "set video rate",     OFFSET(rate),     FF_OPT_TYPE_STRING, {.str = "25"},    },
00065     { "duration", "set video duration", OFFSET(duration), FF_OPT_TYPE_STRING, {.str = NULL},    },
00066     { "sar",      "set video sample aspect ratio", OFFSET(sar), FF_OPT_TYPE_RATIONAL, {1},  0, INT_MAX },
00067     { NULL },
00068 };
00069 
00070 static av_cold int init_common(AVFilterContext *ctx, const char *args, void *opaque)
00071 {
00072     TestSourceContext *test = ctx->priv;
00073     AVRational frame_rate_q;
00074     int64_t duration = -1;
00075     int ret = 0;
00076 
00077     av_opt_set_defaults(test);
00078 
00079     if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0) {
00080         av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
00081         return ret;
00082     }
00083 
00084     if ((ret = av_parse_video_size(&test->w, &test->h, test->size)) < 0) {
00085         av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", test->size);
00086         return ret;
00087     }
00088 
00089     if ((ret = av_parse_video_rate(&frame_rate_q, test->rate)) < 0 ||
00090         frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
00091         av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", test->rate);
00092         return ret;
00093     }
00094 
00095     if ((test->duration) && (ret = av_parse_time(&duration, test->duration, 1)) < 0) {
00096         av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration);
00097         return ret;
00098     }
00099 
00100     test->time_base.num = frame_rate_q.den;
00101     test->time_base.den = frame_rate_q.num;
00102     test->max_pts = duration >= 0 ?
00103         av_rescale_q(duration, AV_TIME_BASE_Q, test->time_base) : -1;
00104     test->nb_frame = 0;
00105     test->pts = 0;
00106 
00107     av_log(ctx, AV_LOG_DEBUG, "size:%dx%d rate:%d/%d duration:%f sar:%d/%d\n",
00108            test->w, test->h, frame_rate_q.num, frame_rate_q.den,
00109            duration < 0 ? -1 : test->max_pts * av_q2d(test->time_base),
00110            test->sar.num, test->sar.den);
00111     return 0;
00112 }
00113 
00114 static int config_props(AVFilterLink *outlink)
00115 {
00116     TestSourceContext *test = outlink->src->priv;
00117 
00118     outlink->w = test->w;
00119     outlink->h = test->h;
00120     outlink->sample_aspect_ratio = test->sar;
00121     outlink->time_base = test->time_base;
00122 
00123     return 0;
00124 }
00125 
00126 static int request_frame(AVFilterLink *outlink)
00127 {
00128     TestSourceContext *test = outlink->src->priv;
00129     AVFilterBufferRef *picref;
00130 
00131     if (test->max_pts >= 0 && test->pts > test->max_pts)
00132         return AVERROR_EOF;
00133     picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
00134                                        test->w, test->h);
00135     picref->pts = test->pts++;
00136     picref->pos = -1;
00137     picref->video->key_frame = 1;
00138     picref->video->interlaced = 0;
00139     picref->video->pict_type = AV_PICTURE_TYPE_I;
00140     picref->video->pixel_aspect = test->sar;
00141     test->nb_frame++;
00142     test->fill_picture_fn(outlink->src, picref);
00143 
00144     avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
00145     avfilter_draw_slice(outlink, 0, picref->video->h, 1);
00146     avfilter_end_frame(outlink);
00147     avfilter_unref_buffer(picref);
00148 
00149     return 0;
00150 }
00151 
00152 #if CONFIG_TESTSRC_FILTER
00153 
00154 static const char *testsrc_get_name(void *ctx)
00155 {
00156     return "testsrc";
00157 }
00158 
00159 static const AVClass testsrc_class = {
00160     .class_name = "TestSourceContext",
00161     .item_name  = testsrc_get_name,
00162     .option     = testsrc_options,
00163 };
00164 
00177 static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, unsigned segment_width,
00178                            unsigned x, unsigned y, unsigned w, unsigned h)
00179 {
00180     int i;
00181     int step = 3;
00182 
00183     dst += segment_width * (step * x + y * dst_linesize);
00184     w *= segment_width * step;
00185     h *= segment_width;
00186     for (i = 0; i < h; i++) {
00187         memset(dst, val, w);
00188         dst += dst_linesize;
00189     }
00190 }
00191 
00192 static void draw_digit(int digit, uint8_t *dst, unsigned dst_linesize,
00193                        unsigned segment_width)
00194 {
00195 #define TOP_HBAR        1
00196 #define MID_HBAR        2
00197 #define BOT_HBAR        4
00198 #define LEFT_TOP_VBAR   8
00199 #define LEFT_BOT_VBAR  16
00200 #define RIGHT_TOP_VBAR 32
00201 #define RIGHT_BOT_VBAR 64
00202     struct {
00203         int x, y, w, h;
00204     } segments[] = {
00205         { 1,  0, 5, 1 }, /* TOP_HBAR */
00206         { 1,  6, 5, 1 }, /* MID_HBAR */
00207         { 1, 12, 5, 1 }, /* BOT_HBAR */
00208         { 0,  1, 1, 5 }, /* LEFT_TOP_VBAR */
00209         { 0,  7, 1, 5 }, /* LEFT_BOT_VBAR */
00210         { 6,  1, 1, 5 }, /* RIGHT_TOP_VBAR */
00211         { 6,  7, 1, 5 }  /* RIGHT_BOT_VBAR */
00212     };
00213     static const unsigned char masks[10] = {
00214         /* 0 */ TOP_HBAR         |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00215         /* 1 */                                                        RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00216         /* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR                             |RIGHT_TOP_VBAR,
00217         /* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR                            |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00218         /* 4 */          MID_HBAR         |LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00219         /* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR                             |RIGHT_BOT_VBAR,
00220         /* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR               |RIGHT_BOT_VBAR,
00221         /* 7 */ TOP_HBAR                                              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00222         /* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00223         /* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
00224     };
00225     unsigned mask = masks[digit];
00226     int i;
00227 
00228     draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
00229     for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
00230         if (mask & (1<<i))
00231             draw_rectangle(255, dst, dst_linesize, segment_width,
00232                            segments[i].x, segments[i].y, segments[i].w, segments[i].h);
00233 }
00234 
00235 #define GRADIENT_SIZE (6 * 256)
00236 
00237 static void test_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
00238 {
00239     TestSourceContext *test = ctx->priv;
00240     uint8_t *p, *p0;
00241     int x, y;
00242     int color, color_rest;
00243     int icolor;
00244     int radius;
00245     int quad0, quad;
00246     int dquad_x, dquad_y;
00247     int grad, dgrad, rgrad, drgrad;
00248     int seg_size;
00249     int second;
00250     int i;
00251     uint8_t *data = picref->data[0];
00252     int width  = picref->video->w;
00253     int height = picref->video->h;
00254 
00255     /* draw colored bars and circle */
00256     radius = (width + height) / 4;
00257     quad0 = width * width / 4 + height * height / 4 - radius * radius;
00258     dquad_y = 1 - height;
00259     p0 = data;
00260     for (y = 0; y < height; y++) {
00261         p = p0;
00262         color = 0;
00263         color_rest = 0;
00264         quad = quad0;
00265         dquad_x = 1 - width;
00266         for (x = 0; x < width; x++) {
00267             icolor = color;
00268             if (quad < 0)
00269                 icolor ^= 7;
00270             quad += dquad_x;
00271             dquad_x += 2;
00272             *(p++) = icolor & 1 ? 255 : 0;
00273             *(p++) = icolor & 2 ? 255 : 0;
00274             *(p++) = icolor & 4 ? 255 : 0;
00275             color_rest += 8;
00276             if (color_rest >= width) {
00277                 color_rest -= width;
00278                 color++;
00279             }
00280         }
00281         quad0 += dquad_y;
00282         dquad_y += 2;
00283         p0 += picref->linesize[0];
00284     }
00285 
00286     /* draw sliding color line */
00287     p = data + picref->linesize[0] * height * 3/4;
00288     grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
00289         GRADIENT_SIZE;
00290     rgrad = 0;
00291     dgrad = GRADIENT_SIZE / width;
00292     drgrad = GRADIENT_SIZE % width;
00293     for (x = 0; x < width; x++) {
00294         *(p++) =
00295             grad < 256 || grad >= 5 * 256 ? 255 :
00296             grad >= 2 * 256 && grad < 4 * 256 ? 0 :
00297             grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
00298         *(p++) =
00299             grad >= 4 * 256 ? 0 :
00300             grad >= 1 * 256 && grad < 3 * 256 ? 255 :
00301             grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
00302         *(p++) =
00303             grad < 2 * 256 ? 0 :
00304             grad >= 3 * 256 && grad < 5 * 256 ? 255 :
00305             grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
00306         grad += dgrad;
00307         rgrad += drgrad;
00308         if (rgrad >= GRADIENT_SIZE) {
00309             grad++;
00310             rgrad -= GRADIENT_SIZE;
00311         }
00312         if (grad >= GRADIENT_SIZE)
00313             grad -= GRADIENT_SIZE;
00314     }
00315     for (y = height / 8; y > 0; y--) {
00316         memcpy(p, p - picref->linesize[0], 3 * width);
00317         p += picref->linesize[0];
00318     }
00319 
00320     /* draw digits */
00321     seg_size = width / 80;
00322     if (seg_size >= 1 && height >= 13 * seg_size) {
00323         second = test->nb_frame * test->time_base.num / test->time_base.den;
00324         x = width - (width - seg_size * 64) / 2;
00325         y = (height - seg_size * 13) / 2;
00326         p = data + (x*3 + y * picref->linesize[0]);
00327         for (i = 0; i < 8; i++) {
00328             p -= 3 * 8 * seg_size;
00329             draw_digit(second % 10, p, picref->linesize[0], seg_size);
00330             second /= 10;
00331             if (second == 0)
00332                 break;
00333         }
00334     }
00335 }
00336 
00337 static av_cold int test_init(AVFilterContext *ctx, const char *args, void *opaque)
00338 {
00339     TestSourceContext *test = ctx->priv;
00340 
00341     test->class = &testsrc_class;
00342     test->fill_picture_fn = test_fill_picture;
00343     return init_common(ctx, args, opaque);
00344 }
00345 
00346 static int test_query_formats(AVFilterContext *ctx)
00347 {
00348     static const enum PixelFormat pix_fmts[] = {
00349         PIX_FMT_RGB24, PIX_FMT_NONE
00350     };
00351     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
00352     return 0;
00353 }
00354 
00355 AVFilter avfilter_vsrc_testsrc = {
00356     .name          = "testsrc",
00357     .description   = NULL_IF_CONFIG_SMALL("Generate test pattern."),
00358     .priv_size     = sizeof(TestSourceContext),
00359     .init          = test_init,
00360 
00361     .query_formats = test_query_formats,
00362 
00363     .inputs    = (AVFilterPad[]) {{ .name = NULL}},
00364 
00365     .outputs   = (AVFilterPad[]) {{ .name = "default",
00366                                     .type = AVMEDIA_TYPE_VIDEO,
00367                                     .request_frame = request_frame,
00368                                     .config_props  = config_props, },
00369                                   { .name = NULL }},
00370 };
00371 
00372 #endif /* CONFIG_TESTSRC_FILTER */
00373 
00374 #if CONFIG_RGBTESTSRC_FILTER
00375 
00376 static const char *rgbtestsrc_get_name(void *ctx)
00377 {
00378     return "rgbtestsrc";
00379 }
00380 
00381 static const AVClass rgbtestsrc_class = {
00382     .class_name = "RGBTestSourceContext",
00383     .item_name  = rgbtestsrc_get_name,
00384     .option     = testsrc_options,
00385 };
00386 
00387 #define R 0
00388 #define G 1
00389 #define B 2
00390 #define A 3
00391 
00392 static void rgbtest_put_pixel(uint8_t *dst, int dst_linesize,
00393                               int x, int y, int r, int g, int b, enum PixelFormat fmt,
00394                               int rgba_map[4])
00395 {
00396     int32_t v;
00397     uint8_t *p;
00398 
00399     switch (fmt) {
00400     case PIX_FMT_BGR444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r >> 4) << 8) | ((g >> 4) << 4) | (b >> 4); break;
00401     case PIX_FMT_RGB444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b >> 4) << 8) | ((g >> 4) << 4) | (r >> 4); break;
00402     case PIX_FMT_BGR555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<10) | ((g>>3)<<5) | (b>>3); break;
00403     case PIX_FMT_RGB555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<10) | ((g>>3)<<5) | (r>>3); break;
00404     case PIX_FMT_BGR565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); break;
00405     case PIX_FMT_RGB565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); break;
00406     case PIX_FMT_RGB24:
00407     case PIX_FMT_BGR24:
00408         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
00409         p = dst + 3*x + y*dst_linesize;
00410         AV_WL24(p, v);
00411         break;
00412     case PIX_FMT_RGBA:
00413     case PIX_FMT_BGRA:
00414     case PIX_FMT_ARGB:
00415     case PIX_FMT_ABGR:
00416         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
00417         p = dst + 4*x + y*dst_linesize;
00418         AV_WL32(p, v);
00419         break;
00420     }
00421 }
00422 
00423 static void rgbtest_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
00424 {
00425     TestSourceContext *test = ctx->priv;
00426     int x, y, w = picref->video->w, h = picref->video->h;
00427 
00428     for (y = 0; y < h; y++) {
00429          for (x = 0; x < picref->video->w; x++) {
00430              int c = 256*x/w;
00431              int r = 0, g = 0, b = 0;
00432 
00433              if      (3*y < h  ) r = c;
00434              else if (3*y < 2*h) g = c;
00435              else                b = c;
00436 
00437              rgbtest_put_pixel(picref->data[0], picref->linesize[0], x, y, r, g, b,
00438                                ctx->outputs[0]->format, test->rgba_map);
00439          }
00440      }
00441 }
00442 
00443 static av_cold int rgbtest_init(AVFilterContext *ctx, const char *args, void *opaque)
00444 {
00445     TestSourceContext *test = ctx->priv;
00446 
00447     test->class = &rgbtestsrc_class;
00448     test->fill_picture_fn = rgbtest_fill_picture;
00449     return init_common(ctx, args, opaque);
00450 }
00451 
00452 static int rgbtest_query_formats(AVFilterContext *ctx)
00453 {
00454     static const enum PixelFormat pix_fmts[] = {
00455         PIX_FMT_RGBA, PIX_FMT_ARGB, PIX_FMT_BGRA, PIX_FMT_ABGR,
00456         PIX_FMT_BGR24, PIX_FMT_RGB24,
00457         PIX_FMT_RGB444, PIX_FMT_BGR444,
00458         PIX_FMT_RGB565, PIX_FMT_BGR565,
00459         PIX_FMT_RGB555, PIX_FMT_BGR555,
00460         PIX_FMT_NONE
00461     };
00462     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
00463     return 0;
00464 }
00465 
00466 static int rgbtest_config_props(AVFilterLink *outlink)
00467 {
00468     TestSourceContext *test = outlink->src->priv;
00469 
00470     switch (outlink->format) {
00471     case PIX_FMT_ARGB:  test->rgba_map[A] = 0; test->rgba_map[R] = 1; test->rgba_map[G] = 2; test->rgba_map[B] = 3; break;
00472     case PIX_FMT_ABGR:  test->rgba_map[A] = 0; test->rgba_map[B] = 1; test->rgba_map[G] = 2; test->rgba_map[R] = 3; break;
00473     case PIX_FMT_RGBA:
00474     case PIX_FMT_RGB24: test->rgba_map[R] = 0; test->rgba_map[G] = 1; test->rgba_map[B] = 2; test->rgba_map[A] = 3; break;
00475     case PIX_FMT_BGRA:
00476     case PIX_FMT_BGR24: test->rgba_map[B] = 0; test->rgba_map[G] = 1; test->rgba_map[R] = 2; test->rgba_map[A] = 3; break;
00477     }
00478 
00479     return config_props(outlink);
00480 }
00481 
00482 AVFilter avfilter_vsrc_rgbtestsrc = {
00483     .name          = "rgbtestsrc",
00484     .description   = NULL_IF_CONFIG_SMALL("Generate RGB test pattern."),
00485     .priv_size     = sizeof(TestSourceContext),
00486     .init          = rgbtest_init,
00487 
00488     .query_formats = rgbtest_query_formats,
00489 
00490     .inputs    = (AVFilterPad[]) {{ .name = NULL}},
00491 
00492     .outputs   = (AVFilterPad[]) {{ .name = "default",
00493                                     .type = AVMEDIA_TYPE_VIDEO,
00494                                     .request_frame = request_frame,
00495                                     .config_props  = rgbtest_config_props, },
00496                                   { .name = NULL }},
00497 };
00498 
00499 #endif /* CONFIG_RGBTESTSRC_FILTER */