diff options
Diffstat (limited to 'libavfilter/vf_vidstabdetect.c')
-rw-r--r-- | libavfilter/vf_vidstabdetect.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/libavfilter/vf_vidstabdetect.c b/libavfilter/vf_vidstabdetect.c new file mode 100644 index 0000000..1df6f74 --- /dev/null +++ b/libavfilter/vf_vidstabdetect.c @@ -0,0 +1,219 @@ +/* + * 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", OFFSET(result), AV_OPT_TYPE_STRING, {.str = DEFAULT_RESULT_NAME}, .flags = FLAGS}, + {"shakiness", "how shaky is the video and how quick is the camera?" + " 1: little (fast) 10: very strong/quick (slow)", OFFSETC(shakiness), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 10, FLAGS}, + {"accuracy", "(>=shakiness) 1: low 15: high (slow)", OFFSETC(accuracy), AV_OPT_TYPE_INT, {.i64 = 15}, 1, 15, FLAGS}, + {"stepsize", "region around minimum is scanned with 1 pixel resolution", OFFSETC(stepSize), AV_OPT_TYPE_INT, {.i64 = 6}, 1, 32, FLAGS}, + {"mincontrast", "below this contrast a field is discarded (0-1)", OFFSETC(contrastThreshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.25}, 0.0, 1.0, FLAGS}, + {"show", "0: draw nothing; 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)", 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; + ff_vs_init(); + 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, + ff_av2vs_pixfmt(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 initialized 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, " tripod = %d\n", sd->conf.virtualTripod); + 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]; + VSFrame frame; + int plane; + + if (sd->conf.show > 0 && !av_frame_is_writable(in)) + av_frame_make_writable(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) { + int ret = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "cannot write to transform file"); + return ret; + } + vs_vector_del(&localmotions); + } + + return ff_filter_frame(outlink, in); +} + +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 ff_vf_vidstabdetect = { + .name = "vidstabdetect", + .description = NULL_IF_CONFIG_SMALL("Extract relative transformations, " + "pass 1 of 2 for stabilization " + "(see vidstabtransform for pass 2)."), + .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, +}; |