/* * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * Copyright (c) 2014 Clément Bœsch <u pkh me> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Codec debug viewer filter. * * All the MV drawing code from Michael Niedermayer is extracted from * libavcodec/mpegvideo.c. * * TODO: segmentation * TODO: quantization */ #include "libavutil/imgutils.h" #include "libavutil/motion_vector.h" #include "libavutil/opt.h" #include "avfilter.h" #include "internal.h" #define MV_P_FOR (1<<0) #define MV_B_FOR (1<<1) #define MV_B_BACK (1<<2) typedef struct { const AVClass *class; unsigned mv; } CodecViewContext; #define OFFSET(x) offsetof(CodecViewContext, x) #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM static const AVOption codecview_options[] = { { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" }, {"pf", "forward predicted MVs of P-frames", 0, AV_OPT_TYPE_CONST, {.i64 = MV_P_FOR }, INT_MIN, INT_MAX, FLAGS, "mv"}, {"bf", "forward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.i64 = MV_B_FOR }, INT_MIN, INT_MAX, FLAGS, "mv"}, {"bb", "backward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.i64 = MV_B_BACK }, INT_MIN, INT_MAX, FLAGS, "mv"}, { NULL } }; AVFILTER_DEFINE_CLASS(codecview); static int query_formats(AVFilterContext *ctx) { // TODO: we can probably add way more pixel formats without any other // changes; anything with 8-bit luma in first plane should be working static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE}; AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); if (!fmts_list) return AVERROR(ENOMEM); return ff_set_common_formats(ctx, fmts_list); } static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx) { if(*sx > *ex) return clip_line(ex, ey, sx, sy, maxx); if (*sx < 0) { if (*ex < 0) return 1; *sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx); *sx = 0; } if (*ex > maxx) { if (*sx > maxx) return 1; *ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx); *ex = maxx; } return 0; } /** * Draw a line from (ex, ey) -> (sx, sy). * @param w width of the image * @param h height of the image * @param stride stride/linesize of the image * @param color color of the arrow */ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color) { int x, y, fr, f; if (clip_line(&sx, &sy, &ex, &ey, w - 1)) return; if (clip_line(&sy, &sx, &ey, &ex, h - 1)) return; sx = av_clip(sx, 0, w - 1); sy = av_clip(sy, 0, h - 1); ex = av_clip(ex, 0, w - 1); ey = av_clip(ey, 0, h - 1); buf[sy * stride + sx] += color; if (FFABS(ex - sx) > FFABS(ey - sy)) { if (sx > ex) { FFSWAP(int, sx, ex); FFSWAP(int, sy, ey); } buf += sx + sy * stride; ex -= sx; f = ((ey - sy) << 16) / ex; for (x = 0; x <= ex; x++) { y = (x * f) >> 16; fr = (x * f) & 0xFFFF; buf[ y * stride + x] += (color * (0x10000 - fr)) >> 16; if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16; } } else { if (sy > ey) { FFSWAP(int, sx, ex); FFSWAP(int, sy, ey); } buf += sx + sy * stride; ey -= sy; if (ey) f = ((ex - sx) << 16) / ey; else f = 0; for(y= 0; y <= ey; y++){ x = (y*f) >> 16; fr = (y*f) & 0xFFFF; buf[y * stride + x ] += (color * (0x10000 - fr)) >> 16; if(fr) buf[y * stride + x + 1] += (color * fr ) >> 16; } } } /** * Draw an arrow from (ex, ey) -> (sx, sy). * @param w width of the image * @param h height of the image * @param stride stride/linesize of the image * @param color color of the arrow */ static void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color, int tail, int direction) { int dx,dy; if (direction) { FFSWAP(int, sx, ex); FFSWAP(int, sy, ey); } sx = av_clip(sx, -100, w + 100); sy = av_clip(sy, -100, h + 100); ex = av_clip(ex, -100, w + 100); ey = av_clip(ey, -100, h + 100); dx = ex - sx; dy = ey - sy; if (dx * dx + dy * dy > 3 * 3) { int rx = dx + dy; int ry = -dx + dy; int length = sqrt((rx * rx + ry * ry) << 8); // FIXME subpixel accuracy rx = ROUNDED_DIV(rx * 3 << 4, length); ry = ROUNDED_DIV(ry * 3 << 4, length); if (tail) { rx = -rx; ry = -ry; } draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color); draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color); } draw_line(buf, sx, sy, ex, ey, w, h, stride, color); } static int filter_frame(AVFilterLink *inlink, AVFrame *frame) { AVFilterContext *ctx = inlink->dst; CodecViewContext *s = ctx->priv; AVFilterLink *outlink = ctx->outputs[0]; AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS); if (sd) { int i; const AVMotionVector *mvs = (const AVMotionVector *)sd->data; for (i = 0; i < sd->size / sizeof(*mvs); i++) { const AVMotionVector *mv = &mvs[i]; const int direction = mv->source > 0; if ((direction == 0 && (s->mv & MV_P_FOR) && frame->pict_type == AV_PICTURE_TYPE_P) || (direction == 0 && (s->mv & MV_B_FOR) && frame->pict_type == AV_PICTURE_TYPE_B) || (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B)) draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y, frame->width, frame->height, frame->linesize[0], 100, 0, mv->source > 0); } } return ff_filter_frame(outlink, frame); } static const AVFilterPad codecview_inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame, .needs_writable = 1, }, { NULL } }; static const AVFilterPad codecview_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, }, { NULL } }; AVFilter ff_vf_codecview = { .name = "codecview", .description = NULL_IF_CONFIG_SMALL("Visualize information about some codecs"), .priv_size = sizeof(CodecViewContext), .query_formats = query_formats, .inputs = codecview_inputs, .outputs = codecview_outputs, .priv_class = &codecview_class, .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, };