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-rw-r--r--libavfilter/vf_codecview.c322
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diff --git a/libavfilter/vf_codecview.c b/libavfilter/vf_codecview.c
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+/*
+ * 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 CodecViewContext {
+ 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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-21 05:00:57 +0000