yading@10: /* yading@10: * Copyright (C) 2010 Georg Martius yading@10: * Copyright (C) 2010 Daniel G. Taylor yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * fast deshake / depan video filter yading@10: * yading@10: * SAD block-matching motion compensation to fix small changes in yading@10: * horizontal and/or vertical shift. This filter helps remove camera shake yading@10: * from hand-holding a camera, bumping a tripod, moving on a vehicle, etc. yading@10: * yading@10: * Algorithm: yading@10: * - For each frame with one previous reference frame yading@10: * - For each block in the frame yading@10: * - If contrast > threshold then find likely motion vector yading@10: * - For all found motion vectors yading@10: * - Find most common, store as global motion vector yading@10: * - Find most likely rotation angle yading@10: * - Transform image along global motion yading@10: * yading@10: * TODO: yading@10: * - Fill frame edges based on previous/next reference frames yading@10: * - Fill frame edges by stretching image near the edges? yading@10: * - Can this be done quickly and look decent? yading@10: * yading@10: * Dark Shikari links to http://wiki.videolan.org/SoC_x264_2010#GPU_Motion_Estimation_2 yading@10: * for an algorithm similar to what could be used here to get the gmv yading@10: * It requires only a couple diamond searches + fast downscaling yading@10: * yading@10: * Special thanks to Jason Kotenko for his help with the algorithm and my yading@10: * inability to see simple errors in C code. yading@10: */ yading@10: yading@10: #include "avfilter.h" yading@10: #include "formats.h" yading@10: #include "internal.h" yading@10: #include "video.h" yading@10: #include "libavutil/common.h" yading@10: #include "libavutil/mem.h" yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/pixdesc.h" yading@10: #include "libavcodec/dsputil.h" yading@10: yading@10: #include "deshake.h" yading@10: #include "deshake_opencl.h" yading@10: yading@10: #define CHROMA_WIDTH(link) -((-link->w) >> av_pix_fmt_desc_get(link->format)->log2_chroma_w) yading@10: #define CHROMA_HEIGHT(link) -((-link->h) >> av_pix_fmt_desc_get(link->format)->log2_chroma_h) yading@10: yading@10: #define OFFSET(x) offsetof(DeshakeContext, x) yading@10: #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM yading@10: yading@10: #define MAX_R 64 yading@10: yading@10: static const AVOption deshake_options[] = { yading@10: { "x", "set x for the rectangular search area", OFFSET(cx), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS }, yading@10: { "y", "set y for the rectangular search area", OFFSET(cy), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS }, yading@10: { "w", "set width for the rectangular search area", OFFSET(cw), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS }, yading@10: { "h", "set height for the rectangular search area", OFFSET(ch), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS }, yading@10: { "rx", "set x for the rectangular search area", OFFSET(rx), AV_OPT_TYPE_INT, {.i64=16}, 0, MAX_R, .flags = FLAGS }, yading@10: { "ry", "set y for the rectangular search area", OFFSET(ry), AV_OPT_TYPE_INT, {.i64=16}, 0, MAX_R, .flags = FLAGS }, yading@10: { "edge", "set edge mode", OFFSET(edge), AV_OPT_TYPE_INT, {.i64=FILL_MIRROR}, FILL_BLANK, FILL_COUNT-1, FLAGS, "edge"}, yading@10: { "blank", "fill zeroes at blank locations", 0, AV_OPT_TYPE_CONST, {.i64=FILL_BLANK}, INT_MIN, INT_MAX, FLAGS, "edge" }, yading@10: { "original", "original image at blank locations", 0, AV_OPT_TYPE_CONST, {.i64=FILL_ORIGINAL}, INT_MIN, INT_MAX, FLAGS, "edge" }, yading@10: { "clamp", "extruded edge value at blank locations", 0, AV_OPT_TYPE_CONST, {.i64=FILL_CLAMP}, INT_MIN, INT_MAX, FLAGS, "edge" }, yading@10: { "mirror", "mirrored edge at blank locations", 0, AV_OPT_TYPE_CONST, {.i64=FILL_MIRROR}, INT_MIN, INT_MAX, FLAGS, "edge" }, yading@10: { "blocksize", "set motion search blocksize", OFFSET(blocksize), AV_OPT_TYPE_INT, {.i64=8}, 4, 128, .flags = FLAGS }, yading@10: { "contrast", "set contrast threshold for blocks", OFFSET(contrast), AV_OPT_TYPE_INT, {.i64=125}, 1, 255, .flags = FLAGS }, yading@10: { "search", "set search strategy", OFFSET(search), AV_OPT_TYPE_INT, {.i64=EXHAUSTIVE}, EXHAUSTIVE, SEARCH_COUNT-1, FLAGS, "smode" }, yading@10: { "exhaustive", "exhaustive search", 0, AV_OPT_TYPE_CONST, {.i64=EXHAUSTIVE}, INT_MIN, INT_MAX, FLAGS, "smode" }, yading@10: { "less", "less exhaustive search", 0, AV_OPT_TYPE_CONST, {.i64=SMART_EXHAUSTIVE}, INT_MIN, INT_MAX, FLAGS, "smode" }, yading@10: { "filename", "set motion search detailed log file name", OFFSET(filename), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, yading@10: { "opencl", "use OpenCL filtering capabilities", OFFSET(opencl), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags = FLAGS }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFILTER_DEFINE_CLASS(deshake); yading@10: yading@10: static int cmp(const double *a, const double *b) yading@10: { yading@10: return *a < *b ? -1 : ( *a > *b ? 1 : 0 ); yading@10: } yading@10: yading@10: /** yading@10: * Cleaned mean (cuts off 20% of values to remove outliers and then averages) yading@10: */ yading@10: static double clean_mean(double *values, int count) yading@10: { yading@10: double mean = 0; yading@10: int cut = count / 5; yading@10: int x; yading@10: yading@10: qsort(values, count, sizeof(double), (void*)cmp); yading@10: yading@10: for (x = cut; x < count - cut; x++) { yading@10: mean += values[x]; yading@10: } yading@10: yading@10: return mean / (count - cut * 2); yading@10: } yading@10: yading@10: /** yading@10: * Find the most likely shift in motion between two frames for a given yading@10: * macroblock. Test each block against several shifts given by the rx yading@10: * and ry attributes. Searches using a simple matrix of those shifts and yading@10: * chooses the most likely shift by the smallest difference in blocks. yading@10: */ yading@10: static void find_block_motion(DeshakeContext *deshake, uint8_t *src1, yading@10: uint8_t *src2, int cx, int cy, int stride, yading@10: IntMotionVector *mv) yading@10: { yading@10: int x, y; yading@10: int diff; yading@10: int smallest = INT_MAX; yading@10: int tmp, tmp2; yading@10: yading@10: #define CMP(i, j) deshake->c.sad[0](deshake, src1 + cy * stride + cx, \ yading@10: src2 + (j) * stride + (i), stride, \ yading@10: deshake->blocksize) yading@10: yading@10: if (deshake->search == EXHAUSTIVE) { yading@10: // Compare every possible position - this is sloooow! yading@10: for (y = -deshake->ry; y <= deshake->ry; y++) { yading@10: for (x = -deshake->rx; x <= deshake->rx; x++) { yading@10: diff = CMP(cx - x, cy - y); yading@10: if (diff < smallest) { yading@10: smallest = diff; yading@10: mv->x = x; yading@10: mv->y = y; yading@10: } yading@10: } yading@10: } yading@10: } else if (deshake->search == SMART_EXHAUSTIVE) { yading@10: // Compare every other possible position and find the best match yading@10: for (y = -deshake->ry + 1; y < deshake->ry; y += 2) { yading@10: for (x = -deshake->rx + 1; x < deshake->rx; x += 2) { yading@10: diff = CMP(cx - x, cy - y); yading@10: if (diff < smallest) { yading@10: smallest = diff; yading@10: mv->x = x; yading@10: mv->y = y; yading@10: } yading@10: } yading@10: } yading@10: yading@10: // Hone in on the specific best match around the match we found above yading@10: tmp = mv->x; yading@10: tmp2 = mv->y; yading@10: yading@10: for (y = tmp2 - 1; y <= tmp2 + 1; y++) { yading@10: for (x = tmp - 1; x <= tmp + 1; x++) { yading@10: if (x == tmp && y == tmp2) yading@10: continue; yading@10: yading@10: diff = CMP(cx - x, cy - y); yading@10: if (diff < smallest) { yading@10: smallest = diff; yading@10: mv->x = x; yading@10: mv->y = y; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (smallest > 512) { yading@10: mv->x = -1; yading@10: mv->y = -1; yading@10: } yading@10: emms_c(); yading@10: //av_log(NULL, AV_LOG_ERROR, "%d\n", smallest); yading@10: //av_log(NULL, AV_LOG_ERROR, "Final: (%d, %d) = %d x %d\n", cx, cy, mv->x, mv->y); yading@10: } yading@10: yading@10: /** yading@10: * Find the contrast of a given block. When searching for global motion we yading@10: * really only care about the high contrast blocks, so using this method we yading@10: * can actually skip blocks we don't care much about. yading@10: */ yading@10: static int block_contrast(uint8_t *src, int x, int y, int stride, int blocksize) yading@10: { yading@10: int highest = 0; yading@10: int lowest = 0; yading@10: int i, j, pos; yading@10: yading@10: for (i = 0; i <= blocksize * 2; i++) { yading@10: // We use a width of 16 here to match the libavcodec sad functions yading@10: for (j = 0; i <= 15; i++) { yading@10: pos = (y - i) * stride + (x - j); yading@10: if (src[pos] < lowest) yading@10: lowest = src[pos]; yading@10: else if (src[pos] > highest) { yading@10: highest = src[pos]; yading@10: } yading@10: } yading@10: } yading@10: yading@10: return highest - lowest; yading@10: } yading@10: yading@10: /** yading@10: * Find the rotation for a given block. yading@10: */ yading@10: static double block_angle(int x, int y, int cx, int cy, IntMotionVector *shift) yading@10: { yading@10: double a1, a2, diff; yading@10: yading@10: a1 = atan2(y - cy, x - cx); yading@10: a2 = atan2(y - cy + shift->y, x - cx + shift->x); yading@10: yading@10: diff = a2 - a1; yading@10: yading@10: return (diff > M_PI) ? diff - 2 * M_PI : yading@10: (diff < -M_PI) ? diff + 2 * M_PI : yading@10: diff; yading@10: } yading@10: yading@10: /** yading@10: * Find the estimated global motion for a scene given the most likely shift yading@10: * for each block in the frame. The global motion is estimated to be the yading@10: * same as the motion from most blocks in the frame, so if most blocks yading@10: * move one pixel to the right and two pixels down, this would yield a yading@10: * motion vector (1, -2). yading@10: */ yading@10: static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2, yading@10: int width, int height, int stride, Transform *t) yading@10: { yading@10: int x, y; yading@10: IntMotionVector mv = {0, 0}; yading@10: int counts[2*MAX_R+1][2*MAX_R+1]; yading@10: int count_max_value = 0; yading@10: int contrast; yading@10: yading@10: int pos; yading@10: double *angles = av_malloc(sizeof(*angles) * width * height / (16 * deshake->blocksize)); yading@10: int center_x = 0, center_y = 0; yading@10: double p_x, p_y; yading@10: yading@10: // Reset counts to zero yading@10: for (x = 0; x < deshake->rx * 2 + 1; x++) { yading@10: for (y = 0; y < deshake->ry * 2 + 1; y++) { yading@10: counts[x][y] = 0; yading@10: } yading@10: } yading@10: yading@10: pos = 0; yading@10: // Find motion for every block and store the motion vector in the counts yading@10: for (y = deshake->ry; y < height - deshake->ry - (deshake->blocksize * 2); y += deshake->blocksize * 2) { yading@10: // We use a width of 16 here to match the libavcodec sad functions yading@10: for (x = deshake->rx; x < width - deshake->rx - 16; x += 16) { yading@10: // If the contrast is too low, just skip this block as it probably yading@10: // won't be very useful to us. yading@10: contrast = block_contrast(src2, x, y, stride, deshake->blocksize); yading@10: if (contrast > deshake->contrast) { yading@10: //av_log(NULL, AV_LOG_ERROR, "%d\n", contrast); yading@10: find_block_motion(deshake, src1, src2, x, y, stride, &mv); yading@10: if (mv.x != -1 && mv.y != -1) { yading@10: counts[mv.x + deshake->rx][mv.y + deshake->ry] += 1; yading@10: if (x > deshake->rx && y > deshake->ry) yading@10: angles[pos++] = block_angle(x, y, 0, 0, &mv); yading@10: yading@10: center_x += mv.x; yading@10: center_y += mv.y; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (pos) { yading@10: center_x /= pos; yading@10: center_y /= pos; yading@10: t->angle = clean_mean(angles, pos); yading@10: if (t->angle < 0.001) yading@10: t->angle = 0; yading@10: } else { yading@10: t->angle = 0; yading@10: } yading@10: yading@10: // Find the most common motion vector in the frame and use it as the gmv yading@10: for (y = deshake->ry * 2; y >= 0; y--) { yading@10: for (x = 0; x < deshake->rx * 2 + 1; x++) { yading@10: //av_log(NULL, AV_LOG_ERROR, "%5d ", counts[x][y]); yading@10: if (counts[x][y] > count_max_value) { yading@10: t->vector.x = x - deshake->rx; yading@10: t->vector.y = y - deshake->ry; yading@10: count_max_value = counts[x][y]; yading@10: } yading@10: } yading@10: //av_log(NULL, AV_LOG_ERROR, "\n"); yading@10: } yading@10: yading@10: p_x = (center_x - width / 2); yading@10: p_y = (center_y - height / 2); yading@10: t->vector.x += (cos(t->angle)-1)*p_x - sin(t->angle)*p_y; yading@10: t->vector.y += sin(t->angle)*p_x + (cos(t->angle)-1)*p_y; yading@10: yading@10: // Clamp max shift & rotation? yading@10: t->vector.x = av_clipf(t->vector.x, -deshake->rx * 2, deshake->rx * 2); yading@10: t->vector.y = av_clipf(t->vector.y, -deshake->ry * 2, deshake->ry * 2); yading@10: t->angle = av_clipf(t->angle, -0.1, 0.1); yading@10: yading@10: //av_log(NULL, AV_LOG_ERROR, "%d x %d\n", avg->x, avg->y); yading@10: av_free(angles); yading@10: } yading@10: yading@10: static int deshake_transform_c(AVFilterContext *ctx, yading@10: int width, int height, int cw, int ch, yading@10: const float *matrix_y, const float *matrix_uv, yading@10: enum InterpolateMethod interpolate, yading@10: enum FillMethod fill, AVFrame *in, AVFrame *out) yading@10: { yading@10: int i = 0, ret = 0; yading@10: const float *matrixs[3]; yading@10: int plane_w[3], plane_h[3]; yading@10: matrixs[0] = matrix_y; yading@10: matrixs[1] = matrixs[2] = matrix_uv; yading@10: plane_w[0] = width; yading@10: plane_w[1] = plane_w[2] = cw; yading@10: plane_h[0] = height; yading@10: plane_h[1] = plane_h[2] = ch; yading@10: yading@10: for (i = 0; i < 3; i++) { yading@10: // Transform the luma and chroma planes yading@10: ret = avfilter_transform(in->data[i], out->data[i], in->linesize[i], out->linesize[i], yading@10: plane_w[i], plane_h[i], matrixs[i], interpolate, fill); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: return ret; yading@10: } yading@10: yading@10: static av_cold int init(AVFilterContext *ctx) yading@10: { yading@10: int ret; yading@10: DeshakeContext *deshake = ctx->priv; yading@10: yading@10: deshake->refcount = 20; // XXX: add to options? yading@10: deshake->blocksize /= 2; yading@10: deshake->blocksize = av_clip(deshake->blocksize, 4, 128); yading@10: yading@10: if (deshake->filename) yading@10: deshake->fp = fopen(deshake->filename, "w"); yading@10: if (deshake->fp) yading@10: fwrite("Ori x, Avg x, Fin x, Ori y, Avg y, Fin y, Ori angle, Avg angle, Fin angle, Ori zoom, Avg zoom, Fin zoom\n", sizeof(char), 104, deshake->fp); yading@10: yading@10: // Quadword align left edge of box for MMX code, adjust width if necessary yading@10: // to keep right margin yading@10: if (deshake->cx > 0) { yading@10: deshake->cw += deshake->cx - (deshake->cx & ~15); yading@10: deshake->cx &= ~15; yading@10: } yading@10: deshake->transform = deshake_transform_c; yading@10: if (!CONFIG_OPENCL && deshake->opencl) { yading@10: av_log(ctx, AV_LOG_ERROR, "OpenCL support was not enabled in this build, cannot be selected\n"); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: yading@10: if (CONFIG_OPENCL && deshake->opencl) { yading@10: deshake->transform = ff_opencl_transform; yading@10: ret = ff_opencl_deshake_init(ctx); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: av_log(ctx, AV_LOG_VERBOSE, "cx: %d, cy: %d, cw: %d, ch: %d, rx: %d, ry: %d, edge: %d blocksize: %d contrast: %d search: %d\n", yading@10: deshake->cx, deshake->cy, deshake->cw, deshake->ch, yading@10: deshake->rx, deshake->ry, deshake->edge, deshake->blocksize * 2, deshake->contrast, deshake->search); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int query_formats(AVFilterContext *ctx) yading@10: { yading@10: static const enum AVPixelFormat pix_fmts[] = { yading@10: AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, yading@10: AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, yading@10: AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE yading@10: }; yading@10: yading@10: ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int config_props(AVFilterLink *link) yading@10: { yading@10: DeshakeContext *deshake = link->dst->priv; yading@10: yading@10: deshake->ref = NULL; yading@10: deshake->last.vector.x = 0; yading@10: deshake->last.vector.y = 0; yading@10: deshake->last.angle = 0; yading@10: deshake->last.zoom = 0; yading@10: yading@10: deshake->avctx = avcodec_alloc_context3(NULL); yading@10: avpriv_dsputil_init(&deshake->c, deshake->avctx); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold void uninit(AVFilterContext *ctx) yading@10: { yading@10: DeshakeContext *deshake = ctx->priv; yading@10: if (CONFIG_OPENCL && deshake->opencl) { yading@10: ff_opencl_deshake_uninit(ctx); yading@10: } yading@10: av_frame_free(&deshake->ref); yading@10: if (deshake->fp) yading@10: fclose(deshake->fp); yading@10: if (deshake->avctx) yading@10: avcodec_close(deshake->avctx); yading@10: av_freep(&deshake->avctx); yading@10: } yading@10: yading@10: static int filter_frame(AVFilterLink *link, AVFrame *in) yading@10: { yading@10: DeshakeContext *deshake = link->dst->priv; yading@10: AVFilterLink *outlink = link->dst->outputs[0]; yading@10: AVFrame *out; yading@10: Transform t = {{0},0}, orig = {{0},0}; yading@10: float matrix_y[9], matrix_uv[9]; yading@10: float alpha = 2.0 / deshake->refcount; yading@10: char tmp[256]; yading@10: int ret = 0; yading@10: yading@10: out = ff_get_video_buffer(outlink, outlink->w, outlink->h); yading@10: if (!out) { yading@10: av_frame_free(&in); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: av_frame_copy_props(out, in); yading@10: yading@10: if (CONFIG_OPENCL && deshake->opencl) { yading@10: ret = ff_opencl_deshake_process_inout_buf(link->dst,in, out); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: yading@10: if (deshake->cx < 0 || deshake->cy < 0 || deshake->cw < 0 || deshake->ch < 0) { yading@10: // Find the most likely global motion for the current frame yading@10: find_motion(deshake, (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0], in->data[0], link->w, link->h, in->linesize[0], &t); yading@10: } else { yading@10: uint8_t *src1 = (deshake->ref == NULL) ? in->data[0] : deshake->ref->data[0]; yading@10: uint8_t *src2 = in->data[0]; yading@10: yading@10: deshake->cx = FFMIN(deshake->cx, link->w); yading@10: deshake->cy = FFMIN(deshake->cy, link->h); yading@10: yading@10: if ((unsigned)deshake->cx + (unsigned)deshake->cw > link->w) deshake->cw = link->w - deshake->cx; yading@10: if ((unsigned)deshake->cy + (unsigned)deshake->ch > link->h) deshake->ch = link->h - deshake->cy; yading@10: yading@10: // Quadword align right margin yading@10: deshake->cw &= ~15; yading@10: yading@10: src1 += deshake->cy * in->linesize[0] + deshake->cx; yading@10: src2 += deshake->cy * in->linesize[0] + deshake->cx; yading@10: yading@10: find_motion(deshake, src1, src2, deshake->cw, deshake->ch, in->linesize[0], &t); yading@10: } yading@10: yading@10: yading@10: // Copy transform so we can output it later to compare to the smoothed value yading@10: orig.vector.x = t.vector.x; yading@10: orig.vector.y = t.vector.y; yading@10: orig.angle = t.angle; yading@10: orig.zoom = t.zoom; yading@10: yading@10: // Generate a one-sided moving exponential average yading@10: deshake->avg.vector.x = alpha * t.vector.x + (1.0 - alpha) * deshake->avg.vector.x; yading@10: deshake->avg.vector.y = alpha * t.vector.y + (1.0 - alpha) * deshake->avg.vector.y; yading@10: deshake->avg.angle = alpha * t.angle + (1.0 - alpha) * deshake->avg.angle; yading@10: deshake->avg.zoom = alpha * t.zoom + (1.0 - alpha) * deshake->avg.zoom; yading@10: yading@10: // Remove the average from the current motion to detect the motion that yading@10: // is not on purpose, just as jitter from bumping the camera yading@10: t.vector.x -= deshake->avg.vector.x; yading@10: t.vector.y -= deshake->avg.vector.y; yading@10: t.angle -= deshake->avg.angle; yading@10: t.zoom -= deshake->avg.zoom; yading@10: yading@10: // Invert the motion to undo it yading@10: t.vector.x *= -1; yading@10: t.vector.y *= -1; yading@10: t.angle *= -1; yading@10: yading@10: // Write statistics to file yading@10: if (deshake->fp) { yading@10: snprintf(tmp, 256, "%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f\n", orig.vector.x, deshake->avg.vector.x, t.vector.x, orig.vector.y, deshake->avg.vector.y, t.vector.y, orig.angle, deshake->avg.angle, t.angle, orig.zoom, deshake->avg.zoom, t.zoom); yading@10: fwrite(tmp, sizeof(char), strlen(tmp), deshake->fp); yading@10: } yading@10: yading@10: // Turn relative current frame motion into absolute by adding it to the yading@10: // last absolute motion yading@10: t.vector.x += deshake->last.vector.x; yading@10: t.vector.y += deshake->last.vector.y; yading@10: t.angle += deshake->last.angle; yading@10: t.zoom += deshake->last.zoom; yading@10: yading@10: // Shrink motion by 10% to keep things centered in the camera frame yading@10: t.vector.x *= 0.9; yading@10: t.vector.y *= 0.9; yading@10: t.angle *= 0.9; yading@10: yading@10: // Store the last absolute motion information yading@10: deshake->last.vector.x = t.vector.x; yading@10: deshake->last.vector.y = t.vector.y; yading@10: deshake->last.angle = t.angle; yading@10: deshake->last.zoom = t.zoom; yading@10: yading@10: // Generate a luma transformation matrix yading@10: avfilter_get_matrix(t.vector.x, t.vector.y, t.angle, 1.0 + t.zoom / 100.0, matrix_y); yading@10: // Generate a chroma transformation matrix yading@10: avfilter_get_matrix(t.vector.x / (link->w / CHROMA_WIDTH(link)), t.vector.y / (link->h / CHROMA_HEIGHT(link)), t.angle, 1.0 + t.zoom / 100.0, matrix_uv); yading@10: // Transform the luma and chroma planes yading@10: ret = deshake->transform(link->dst, link->w, link->h, CHROMA_WIDTH(link), CHROMA_HEIGHT(link), yading@10: matrix_y, matrix_uv, INTERPOLATE_BILINEAR, deshake->edge, in, out); yading@10: yading@10: // Cleanup the old reference frame yading@10: av_frame_free(&deshake->ref); yading@10: yading@10: if (ret < 0) yading@10: return ret; yading@10: yading@10: // Store the current frame as the reference frame for calculating the yading@10: // motion of the next frame yading@10: deshake->ref = in; yading@10: yading@10: return ff_filter_frame(outlink, out); yading@10: } yading@10: yading@10: static const AVFilterPad deshake_inputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .filter_frame = filter_frame, yading@10: .config_props = config_props, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: static const AVFilterPad deshake_outputs[] = { yading@10: { yading@10: .name = "default", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: }, yading@10: { NULL } yading@10: }; yading@10: yading@10: AVFilter avfilter_vf_deshake = { yading@10: .name = "deshake", yading@10: .description = NULL_IF_CONFIG_SMALL("Stabilize shaky video."), yading@10: .priv_size = sizeof(DeshakeContext), yading@10: .init = init, yading@10: .uninit = uninit, yading@10: .query_formats = query_formats, yading@10: .inputs = deshake_inputs, yading@10: .outputs = deshake_outputs, yading@10: .priv_class = &deshake_class, yading@10: };