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Diffstat (limited to 'libavfilter/vf_vidstabdetect.c')
-rw-r--r-- | libavfilter/vf_vidstabdetect.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/libavfilter/vf_vidstabdetect.c b/libavfilter/vf_vidstabdetect.c new file mode 100644 index 0000000..145d7f9 --- /dev/null +++ b/libavfilter/vf_vidstabdetect.c @@ -0,0 +1,239 @@ +/* + * Copyright (c) 2013 Georg Martius <georg dot martius at web dot de> + * + * 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 + */ + +#define DEFAULT_RESULT_NAME "transforms.trf" + +#include <vid.stab/libvidstab.h> + +#include "libavutil/common.h" +#include "libavutil/opt.h" +#include "libavutil/imgutils.h" +#include "avfilter.h" +#include "internal.h" + +#include "vidstabutils.h" + +typedef struct { + const AVClass* class; + + VSMotionDetect md; + VSMotionDetectConfig conf; + + char* result; + FILE* f; +} StabData; + + +#define OFFSET(x) offsetof(StabData, x) +#define OFFSETC(x) (offsetof(StabData, conf)+offsetof(VSMotionDetectConfig, x)) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption vidstabdetect_options[]= { + {"result", "path to the file used to write the transforms (def:transforms.trf)", OFFSET(result), AV_OPT_TYPE_STRING, {.str = DEFAULT_RESULT_NAME}}, + {"shakiness", "how shaky is the video and how quick is the camera?" + " 1: little (fast) 10: very strong/quick (slow) (def: 5)", OFFSETC(shakiness), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 10, FLAGS}, + {"accuracy", "(>=shakiness) 1: low 15: high (slow) (def: 9)", OFFSETC(accuracy), AV_OPT_TYPE_INT, {.i64 = 9 }, 1, 15, FLAGS}, + {"stepsize", "region around minimum is scanned with 1 pixel resolution (def: 6)", OFFSETC(stepSize), AV_OPT_TYPE_INT, {.i64 = 6}, 1, 32, FLAGS}, + {"mincontrast", "below this contrast a field is discarded (0-1) (def: 0.3)", OFFSETC(contrastThreshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.25}, 0.0, 1.0, FLAGS}, + {"show", "0: draw nothing (def); 1,2: show fields and transforms", OFFSETC(show), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 2, FLAGS}, + {"tripod", "virtual tripod mode (if >0): motion is compared to a reference" + " reference frame (frame # is the value) (def: 0)", OFFSETC(virtualTripod), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS}, + {NULL}, +}; + +AVFILTER_DEFINE_CLASS(vidstabdetect); + +static av_cold int init(AVFilterContext *ctx) +{ + StabData* sd = ctx->priv; + vs_set_mem_and_log_functions(); + sd->class = &vidstabdetect_class; + av_log(ctx, AV_LOG_VERBOSE, "vidstabdetect filter: init %s\n", LIBVIDSTAB_VERSION); + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + StabData *sd = ctx->priv; + VSMotionDetect* md = &(sd->md); + + if (sd->f) { + fclose(sd->f); + sd->f = NULL; + } + + vsMotionDetectionCleanup(md); + +} + +static int query_formats(AVFilterContext *ctx) +{ + // If you add something here also add it in vidstabutils.c + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, + AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P, + AV_PIX_FMT_YUV440P, AV_PIX_FMT_GRAY8, + AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGBA, + AV_PIX_FMT_NONE + }; + + ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); + return 0; +} + + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + StabData *sd = ctx->priv; + + VSMotionDetect* md = &(sd->md); + VSFrameInfo fi; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + + vsFrameInfoInit(&fi,inlink->w, inlink->h, av_2_vs_pixel_format(ctx, inlink->format)); + if(fi.bytesPerPixel != av_get_bits_per_pixel(desc)/8){ + av_log(ctx, AV_LOG_ERROR, "pixel-format error: wrong bits/per/pixel, please report a BUG"); + return AVERROR(EINVAL); + } + if(fi.log2ChromaW != desc->log2_chroma_w){ + av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_w, please report a BUG"); + return AVERROR(EINVAL); + } + + if(fi.log2ChromaH != desc->log2_chroma_h){ + av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_h, please report a BUG"); + return AVERROR(EINVAL); + } + + // set values that are not initializes by the options + sd->conf.algo = 1; + sd->conf.modName = "vidstabdetect"; + if(vsMotionDetectInit(md, &sd->conf, &fi) != VS_OK){ + av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG"); + return AVERROR(EINVAL); + } + + vsMotionDetectGetConfig(&sd->conf, md); + av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n"); + av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", sd->conf.shakiness); + av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", sd->conf.accuracy); + av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", sd->conf.stepSize); + av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", sd->conf.contrastThreshold); + av_log(ctx, AV_LOG_INFO, " show = %d\n", sd->conf.show); + av_log(ctx, AV_LOG_INFO, " result = %s\n", sd->result); + + sd->f = fopen(sd->result, "w"); + if (sd->f == NULL) { + av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", sd->result); + return AVERROR(EINVAL); + }else{ + if(vsPrepareFile(md, sd->f) != VS_OK){ + av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", sd->result); + return AVERROR(EINVAL); + } + } + return 0; +} + + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + StabData *sd = ctx->priv; + VSMotionDetect* md = &(sd->md); + LocalMotions localmotions; + + AVFilterLink *outlink = inlink->dst->outputs[0]; + int direct = 0; + AVFrame *out; + VSFrame frame; + int plane; + + if (av_frame_is_writable(in)) { + direct = 1; + out = in; + } else { + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) { + av_frame_free(&in); + return AVERROR(ENOMEM); + } + av_frame_copy_props(out, in); + } + + for(plane=0; plane < md->fi.planes; plane++){ + frame.data[plane] = in->data[plane]; + frame.linesize[plane] = in->linesize[plane]; + } + if(vsMotionDetection(md, &localmotions, &frame) != VS_OK){ + av_log(ctx, AV_LOG_ERROR, "motion detection failed"); + return AVERROR(AVERROR_EXTERNAL); + } else { + if(vsWriteToFile(md, sd->f, &localmotions) != VS_OK){ + av_log(ctx, AV_LOG_ERROR, "cannot write to transform file"); + return AVERROR(errno); + } + vs_vector_del(&localmotions); + } + if(sd->conf.show>0 && !direct){ + av_image_copy(out->data, out->linesize, + (void*)in->data, in->linesize, + in->format, in->width, in->height); + } + + if (!direct) + av_frame_free(&in); + + return ff_filter_frame(outlink, out); +} + +static const AVFilterPad avfilter_vf_vidstabdetect_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad avfilter_vf_vidstabdetect_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter avfilter_vf_vidstabdetect = { + .name = "vidstabdetect", + .description = NULL_IF_CONFIG_SMALL("pass 1 of 2 for stabilization" + "extracts relative transformations" + "(pass 2 see vidstabtransform)"), + .priv_size = sizeof(StabData), + .init = init, + .uninit = uninit, + .query_formats = query_formats, + + .inputs = avfilter_vf_vidstabdetect_inputs, + .outputs = avfilter_vf_vidstabdetect_outputs, + .priv_class = &vidstabdetect_class, +}; 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