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-rw-r--r--libavfilter/vf_framerate.c509
1 files changed, 509 insertions, 0 deletions
diff --git a/libavfilter/vf_framerate.c b/libavfilter/vf_framerate.c
new file mode 100644
index 0000000000..3e2615be5e
--- /dev/null
+++ b/libavfilter/vf_framerate.c
@@ -0,0 +1,509 @@
+/*
+ * Copyright (C) 2012 Mark Himsley
+ *
+ * get_scene_score() Copyright (c) 2011 Stefano Sabatini
+ * taken from libavfilter/vf_select.c
+ *
+ * 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
+ * filter for upsampling or downsampling a progressive source
+ */
+
+#define DEBUG
+
+#include "libavutil/avassert.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/pixelutils.h"
+
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+#include "framerate.h"
+
+#define OFFSET(x) offsetof(FrameRateContext, x)
+#define V AV_OPT_FLAG_VIDEO_PARAM
+#define F AV_OPT_FLAG_FILTERING_PARAM
+#define FRAMERATE_FLAG_SCD 01
+
+static const AVOption framerate_options[] = {
+ {"fps", "required output frames per second rate", OFFSET(dest_frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="50"}, 0, INT_MAX, V|F },
+
+ {"interp_start", "point to start linear interpolation", OFFSET(interp_start), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, V|F },
+ {"interp_end", "point to end linear interpolation", OFFSET(interp_end), AV_OPT_TYPE_INT, {.i64=240}, 0, 255, V|F },
+ {"scene", "scene change level", OFFSET(scene_score), AV_OPT_TYPE_DOUBLE, {.dbl=8.2}, 0, INT_MAX, V|F },
+
+ {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64=1}, 0, INT_MAX, V|F, "flags" },
+ {"scene_change_detect", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
+ {"scd", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
+
+ {NULL}
+};
+
+AVFILTER_DEFINE_CLASS(framerate);
+
+static av_always_inline int64_t sad_8x8_16(const uint16_t *src1, ptrdiff_t stride1,
+ const uint16_t *src2, ptrdiff_t stride2)
+{
+ int sum = 0;
+ int x, y;
+
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x++)
+ sum += FFABS(src1[x] - src2[x]);
+ src1 += stride1;
+ src2 += stride2;
+ }
+ return sum;
+}
+
+static int64_t scene_sad16(FrameRateContext *s, const uint16_t *p1, int p1_linesize, const uint16_t* p2, int p2_linesize, const int width, const int height)
+{
+ int64_t sad;
+ int x, y;
+ for (sad = y = 0; y < height - 7; y += 8) {
+ for (x = 0; x < width - 7; x += 8) {
+ sad += sad_8x8_16(p1 + y * p1_linesize + x,
+ p1_linesize,
+ p2 + y * p2_linesize + x,
+ p2_linesize);
+ }
+ }
+ return sad;
+}
+
+static int64_t scene_sad8(FrameRateContext *s, uint8_t *p1, int p1_linesize, uint8_t* p2, int p2_linesize, const int width, const int height)
+{
+ int64_t sad;
+ int x, y;
+ for (sad = y = 0; y < height - 7; y += 8) {
+ for (x = 0; x < width - 7; x += 8) {
+ sad += s->sad(p1 + y * p1_linesize + x,
+ p1_linesize,
+ p2 + y * p2_linesize + x,
+ p2_linesize);
+ }
+ }
+ emms_c();
+ return sad;
+}
+
+static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
+{
+ FrameRateContext *s = ctx->priv;
+ double ret = 0;
+
+ ff_dlog(ctx, "get_scene_score()\n");
+
+ if (crnt->height == next->height &&
+ crnt->width == next->width) {
+ int64_t sad;
+ double mafd, diff;
+
+ ff_dlog(ctx, "get_scene_score() process\n");
+ if (s->bitdepth == 8)
+ sad = scene_sad8(s, crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height);
+ else
+ sad = scene_sad16(s, (const uint16_t*)crnt->data[0], crnt->linesize[0] / 2, (const uint16_t*)next->data[0], next->linesize[0] / 2, crnt->width, crnt->height);
+
+ mafd = (double)sad * 100.0 / FFMAX(1, (crnt->height & ~7) * (crnt->width & ~7)) / (1 << s->bitdepth);
+ diff = fabs(mafd - s->prev_mafd);
+ ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
+ s->prev_mafd = mafd;
+ }
+ ff_dlog(ctx, "get_scene_score() result is:%f\n", ret);
+ return ret;
+}
+
+typedef struct ThreadData {
+ AVFrame *copy_src1, *copy_src2;
+ uint16_t src1_factor, src2_factor;
+} ThreadData;
+
+static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
+{
+ FrameRateContext *s = ctx->priv;
+ ThreadData *td = arg;
+ uint16_t src1_factor = td->src1_factor;
+ uint16_t src2_factor = td->src2_factor;
+ int plane;
+
+ for (plane = 0; plane < 4 && td->copy_src1->data[plane] && td->copy_src2->data[plane]; plane++) {
+ int cpy_line_width = s->line_size[plane];
+ uint8_t *cpy_src1_data = td->copy_src1->data[plane];
+ int cpy_src1_line_size = td->copy_src1->linesize[plane];
+ uint8_t *cpy_src2_data = td->copy_src2->data[plane];
+ int cpy_src2_line_size = td->copy_src2->linesize[plane];
+ int cpy_src_h = (plane > 0 && plane < 3) ? (td->copy_src1->height >> s->vsub) : (td->copy_src1->height);
+ uint8_t *cpy_dst_data = s->work->data[plane];
+ int cpy_dst_line_size = s->work->linesize[plane];
+ const int start = (cpy_src_h * job ) / nb_jobs;
+ const int end = (cpy_src_h * (job+1)) / nb_jobs;
+ cpy_src1_data += start * cpy_src1_line_size;
+ cpy_src2_data += start * cpy_src2_line_size;
+ cpy_dst_data += start * cpy_dst_line_size;
+
+ s->blend(cpy_src1_data, cpy_src1_line_size,
+ cpy_src2_data, cpy_src2_line_size,
+ cpy_dst_data, cpy_dst_line_size,
+ cpy_line_width, end - start,
+ src1_factor, src2_factor, s->blend_factor_max >> 1);
+ }
+
+ return 0;
+}
+
+static int blend_frames(AVFilterContext *ctx, int interpolate)
+{
+ FrameRateContext *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ double interpolate_scene_score = 0;
+
+ if ((s->flags & FRAMERATE_FLAG_SCD)) {
+ if (s->score >= 0.0)
+ interpolate_scene_score = s->score;
+ else
+ interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1);
+ ff_dlog(ctx, "blend_frames() interpolate scene score:%f\n", interpolate_scene_score);
+ }
+ // decide if the shot-change detection allows us to blend two frames
+ if (interpolate_scene_score < s->scene_score) {
+ ThreadData td;
+ td.copy_src1 = s->f0;
+ td.copy_src2 = s->f1;
+ td.src2_factor = interpolate;
+ td.src1_factor = s->blend_factor_max - td.src2_factor;
+
+ // get work-space for output frame
+ s->work = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!s->work)
+ return AVERROR(ENOMEM);
+
+ av_frame_copy_props(s->work, s->f0);
+
+ ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
+ ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx)));
+ return 1;
+ }
+ return 0;
+}
+
+static int process_work_frame(AVFilterContext *ctx)
+{
+ FrameRateContext *s = ctx->priv;
+ int64_t work_pts;
+ int64_t interpolate, interpolate8;
+ int ret;
+
+ if (!s->f1)
+ return 0;
+ if (!s->f0 && !s->flush)
+ return 0;
+
+ work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base);
+
+ if (work_pts >= s->pts1 && !s->flush)
+ return 0;
+
+ if (!s->f0) {
+ s->work = av_frame_clone(s->f1);
+ } else {
+ if (work_pts >= s->pts1 + s->delta && s->flush)
+ return 0;
+
+ interpolate = av_rescale(work_pts - s->pts0, s->blend_factor_max, s->delta);
+ interpolate8 = av_rescale(work_pts - s->pts0, 256, s->delta);
+ ff_dlog(ctx, "process_work_frame() interpolate: %"PRId64"/256\n", interpolate8);
+ if (interpolate >= s->blend_factor_max || interpolate8 > s->interp_end) {
+ s->work = av_frame_clone(s->f1);
+ } else if (interpolate <= 0 || interpolate8 < s->interp_start) {
+ s->work = av_frame_clone(s->f0);
+ } else {
+ ret = blend_frames(ctx, interpolate);
+ if (ret < 0)
+ return ret;
+ if (ret == 0)
+ s->work = av_frame_clone(interpolate > (s->blend_factor_max >> 1) ? s->f1 : s->f0);
+ }
+ }
+
+ if (!s->work)
+ return AVERROR(ENOMEM);
+
+ s->work->pts = work_pts;
+ s->n++;
+
+ return 1;
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ FrameRateContext *s = ctx->priv;
+ s->start_pts = AV_NOPTS_VALUE;
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ FrameRateContext *s = ctx->priv;
+ av_frame_free(&s->f0);
+ av_frame_free(&s->f1);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12,
+ AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12,
+ 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 void blend_frames_c(BLEND_FUNC_PARAMS)
+{
+ int line, pixel;
+ for (line = 0; line < height; line++) {
+ for (pixel = 0; pixel < width; pixel++)
+ dst[pixel] = ((src1[pixel] * factor1) + (src2[pixel] * factor2) + half) >> BLEND_FACTOR_DEPTH8;
+ src1 += src1_linesize;
+ src2 += src2_linesize;
+ dst += dst_linesize;
+ }
+}
+
+static void blend_frames16_c(BLEND_FUNC_PARAMS)
+{
+ int line, pixel;
+ uint16_t *dstw = (uint16_t *)dst;
+ uint16_t *src1w = (uint16_t *)src1;
+ uint16_t *src2w = (uint16_t *)src2;
+ width /= 2;
+ src1_linesize /= 2;
+ src2_linesize /= 2;
+ dst_linesize /= 2;
+ for (line = 0; line < height; line++) {
+ for (pixel = 0; pixel < width; pixel++)
+ dstw[pixel] = ((src1w[pixel] * factor1) + (src2w[pixel] * factor2) + half) >> BLEND_FACTOR_DEPTH16;
+ src1w += src1_linesize;
+ src2w += src2_linesize;
+ dstw += dst_linesize;
+ }
+}
+
+void ff_framerate_init(FrameRateContext *s)
+{
+ if (s->bitdepth == 8) {
+ s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH8;
+ s->blend = blend_frames_c;
+ } else {
+ s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH16;
+ s->blend = blend_frames16_c;
+ }
+ if (ARCH_X86)
+ ff_framerate_init_x86(s);
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ FrameRateContext *s = ctx->priv;
+ const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
+ int plane;
+
+ for (plane = 0; plane < 4; plane++) {
+ s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w,
+ plane);
+ }
+
+ s->bitdepth = pix_desc->comp[0].depth;
+ s->vsub = pix_desc->log2_chroma_h;
+
+ s->sad = av_pixelutils_get_sad_fn(3, 3, 2, s); // 8x8 both sources aligned
+ if (!s->sad)
+ return AVERROR(EINVAL);
+
+ s->srce_time_base = inlink->time_base;
+
+ ff_framerate_init(s);
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
+{
+ int ret;
+ AVFilterContext *ctx = inlink->dst;
+ FrameRateContext *s = ctx->priv;
+ int64_t pts;
+
+ if (inpicref->interlaced_frame)
+ av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
+
+ if (inpicref->pts == AV_NOPTS_VALUE) {
+ av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n");
+ return 0;
+ }
+
+ pts = av_rescale_q(inpicref->pts, s->srce_time_base, s->dest_time_base);
+ if (s->f1 && pts == s->pts1) {
+ av_log(ctx, AV_LOG_WARNING, "Ignoring frame with same PTS.\n");
+ return 0;
+ }
+
+ av_frame_free(&s->f0);
+ s->f0 = s->f1;
+ s->pts0 = s->pts1;
+ s->f1 = inpicref;
+ s->pts1 = pts;
+ s->delta = s->pts1 - s->pts0;
+ s->score = -1.0;
+
+ if (s->delta < 0) {
+ av_log(ctx, AV_LOG_WARNING, "PTS discontinuity.\n");
+ s->start_pts = s->pts1;
+ s->n = 0;
+ av_frame_free(&s->f0);
+ }
+
+ if (s->start_pts == AV_NOPTS_VALUE)
+ s->start_pts = s->pts1;
+
+ do {
+ ret = process_work_frame(ctx);
+ if (ret <= 0)
+ return ret;
+ ret = ff_filter_frame(ctx->outputs[0], s->work);
+ } while (ret >= 0);
+
+ return ret;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ FrameRateContext *s = ctx->priv;
+ int exact;
+
+ ff_dlog(ctx, "config_output()\n");
+
+ ff_dlog(ctx,
+ "config_output() input time base:%u/%u (%f)\n",
+ ctx->inputs[0]->time_base.num,ctx->inputs[0]->time_base.den,
+ av_q2d(ctx->inputs[0]->time_base));
+
+ // make sure timebase is small enough to hold the framerate
+
+ exact = av_reduce(&s->dest_time_base.num, &s->dest_time_base.den,
+ av_gcd((int64_t)s->srce_time_base.num * s->dest_frame_rate.num,
+ (int64_t)s->srce_time_base.den * s->dest_frame_rate.den ),
+ (int64_t)s->srce_time_base.den * s->dest_frame_rate.num, INT_MAX);
+
+ av_log(ctx, AV_LOG_INFO,
+ "time base:%u/%u -> %u/%u exact:%d\n",
+ s->srce_time_base.num, s->srce_time_base.den,
+ s->dest_time_base.num, s->dest_time_base.den, exact);
+ if (!exact) {
+ av_log(ctx, AV_LOG_WARNING, "Timebase conversion is not exact\n");
+ }
+
+ outlink->frame_rate = s->dest_frame_rate;
+ outlink->time_base = s->dest_time_base;
+
+ ff_dlog(ctx,
+ "config_output() output time base:%u/%u (%f) w:%d h:%d\n",
+ outlink->time_base.num, outlink->time_base.den,
+ av_q2d(outlink->time_base),
+ outlink->w, outlink->h);
+
+
+ av_log(ctx, AV_LOG_INFO, "fps -> fps:%u/%u scene score:%f interpolate start:%d end:%d\n",
+ s->dest_frame_rate.num, s->dest_frame_rate.den,
+ s->scene_score, s->interp_start, s->interp_end);
+
+ return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ FrameRateContext *s = ctx->priv;
+ int ret;
+
+ ff_dlog(ctx, "request_frame()\n");
+
+ ret = ff_request_frame(ctx->inputs[0]);
+ if (ret == AVERROR_EOF && s->f1 && !s->flush) {
+ s->flush = 1;
+ ret = process_work_frame(ctx);
+ if (ret < 0)
+ return ret;
+ ret = ret ? ff_filter_frame(ctx->outputs[0], s->work) : AVERROR_EOF;
+ }
+
+ ff_dlog(ctx, "request_frame() source's request_frame() returned:%d\n", ret);
+ return ret;
+}
+
+static const AVFilterPad framerate_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad framerate_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .request_frame = request_frame,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_framerate = {
+ .name = "framerate",
+ .description = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."),
+ .priv_size = sizeof(FrameRateContext),
+ .priv_class = &framerate_class,
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = framerate_inputs,
+ .outputs = framerate_outputs,
+ .flags = AVFILTER_FLAG_SLICE_THREADS,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-30 14:24:20 +0000