/* * 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 */ #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)#define MV_TYPE_FOR  (1<<0)#define MV_TYPE_BACK (1<<1)#define FRAME_TYPE_I (1<<0)#define FRAME_TYPE_P (1<<1)#define FRAME_TYPE_B (1<<2) typedef struct {    const AVClass *class;    unsigned mv;    unsigned frame_type;    unsigned mv_type;    int hsub, vsub;    int qp;} CodecViewContext; #define OFFSET(x) offsetof(CodecViewContext, x)#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit } static const AVOption codecview_options[] = {    { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" },        CONST("pf", "forward predicted MVs of P-frames",  MV_P_FOR,  "mv"),        CONST("bf", "forward predicted MVs of B-frames",  MV_B_FOR,  "mv"),        CONST("bb", "backward predicted MVs of B-frames", MV_B_BACK, "mv"),    { "qp", NULL, OFFSET(qp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },    { "mv_type", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },    { "mvt",     "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },        CONST("fp", "forward predicted MVs",  MV_TYPE_FOR,  "mv_type"),        CONST("bp", "backward predicted MVs", MV_TYPE_BACK, "mv_type"),    { "frame_type", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },    { "ft",         "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },        CONST("if", "I-frames", FRAME_TYPE_I, "frame_type"),        CONST("pf", "P-frames", FRAME_TYPE_P, "frame_type"),        CONST("bf", "B-frames", FRAME_TYPE_B, "frame_type"),    { 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];     if (s->qp) {        int qstride, qp_type;        int8_t *qp_table = av_frame_get_qp_table(frame, &qstride, &qp_type);         if (qp_table) {            int x, y;            const int w = AV_CEIL_RSHIFT(frame->width,  s->hsub);            const int h = AV_CEIL_RSHIFT(frame->height, s->vsub);            uint8_t *pu = frame->data[1];            uint8_t *pv = frame->data[2];            const int lzu = frame->linesize[1];            const int lzv = frame->linesize[2];             for (y = 0; y < h; y++) {                for (x = 0; x < w; x++) {                    const int qp = ff_norm_qscale(qp_table[(y >> 3) * qstride + (x >> 3)], qp_type) * 128/31;                    pu[x] = pv[x] = qp;                }                pu += lzu;                pv += lzv;            }        }    }     if (s->mv || s->mv_type) {        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);        if (sd) {            int i;            const AVMotionVector *mvs = (const AVMotionVector *)sd->data;            const int is_iframe = (s->frame_type & FRAME_TYPE_I) && frame->pict_type == AV_PICTURE_TYPE_I;            const int is_pframe = (s->frame_type & FRAME_TYPE_P) && frame->pict_type == AV_PICTURE_TYPE_P;            const int is_bframe = (s->frame_type & FRAME_TYPE_B) && frame->pict_type == AV_PICTURE_TYPE_B;             for (i = 0; i < sd->size / sizeof(*mvs); i++) {                const AVMotionVector *mv = &mvs[i];                const int direction = mv->source > 0;                 if (s->mv_type) {                    const int is_fp = direction == 0 && (s->mv_type & MV_TYPE_FOR);                    const int is_bp = direction == 1 && (s->mv_type & MV_TYPE_BACK);                     if ((!s->frame_type && (is_fp || is_bp)) ||                        is_iframe && is_fp || is_iframe && is_bp ||                        is_pframe && is_fp ||                        is_bframe && is_fp || is_bframe && is_bp)                        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, direction);                } else if (s->mv)                    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, direction);            }        }    }     return ff_filter_frame(outlink, frame);} static int config_input(AVFilterLink *inlink){    AVFilterContext *ctx = inlink->dst;    CodecViewContext *s = ctx->priv;    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);     s->hsub = desc->log2_chroma_w;    s->vsub = desc->log2_chroma_h;    return 0;} static const AVFilterPad codecview_inputs[] = {    {        .name           = "default",        .type           = AVMEDIA_TYPE_VIDEO,        .filter_frame   = filter_frame,        .config_props   = config_input,        .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,};