mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/vf_framerate: simplify filter
The framerate filter was quite convoluted with some filter_frame / request_frame logic bugs. It seemed easier to rewrite the whole filter_frame / request_frame part and also the frame interpolation ratio calculation part in one step. Notable changes: - The filter now only stores 2 frames instead of 3 - filter_frame outputs all the frames it can to be able to handle consecutive filter_frame calls which previously caused early drops of buffered frames. - because of this, request_frame is largely simplified and it only outputs frames on flush. Previously consecuitve request_frame calls could cause the filter to think it is in flush mode filling its buffer with the same frames causing a "ghost" effect on the output. - PTS discontinuities are handled better - frames with unknown PTS values are now dropped Fixes ticket #4870. Probably fixes ticket #5493. Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
parent
860d991fcd
commit
0c31a3876d
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@ -39,8 +39,6 @@
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#include "internal.h"
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#include "video.h"
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#define N_SRCE 3
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typedef struct FrameRateContext {
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const AVClass *class;
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// parameters
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@ -55,30 +53,25 @@ typedef struct FrameRateContext {
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int line_size[4]; ///< bytes of pixel data per line for each plane
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int vsub;
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int frst, next, prev, crnt, last;
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int pending_srce_frames; ///< how many input frames are still waiting to be processed
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int flush; ///< are we flushing final frames
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int pending_end_frame; ///< flag indicating we are waiting to call filter_frame()
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AVRational srce_time_base; ///< timebase of source
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AVRational dest_time_base; ///< timebase of destination
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int32_t dest_frame_num;
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int64_t last_dest_frame_pts; ///< pts of the last frame output
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int64_t average_srce_pts_dest_delta;///< average input pts delta converted from input rate to output rate
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int64_t average_dest_pts_delta; ///< calculated average output pts delta
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av_pixelutils_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
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double prev_mafd; ///< previous MAFD (scene detect only)
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AVFrame *srce[N_SRCE]; ///< buffered source frames
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int64_t srce_pts_dest[N_SRCE]; ///< pts for source frames scaled to output timebase
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double srce_score[N_SRCE]; ///< scene change score compared to the next srce frame
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int64_t pts; ///< pts of frame we are working on
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int max;
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int bitdepth;
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AVFrame *work;
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AVFrame *f0; ///< last frame
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AVFrame *f1; ///< current frame
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int64_t pts0; ///< last frame pts in dest_time_base
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int64_t pts1; ///< current frame pts in dest_time_base
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int64_t delta; ///< pts1 to pts0 delta
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double score; ///< scene change score (f0 to f1)
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int flush; ///< 1 if the filter is being flushed
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int64_t start_pts; ///< pts of the first output frame
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int64_t n; ///< output frame counter
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} FrameRateContext;
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#define OFFSET(x) offsetof(FrameRateContext, x)
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@ -102,27 +95,6 @@ static const AVOption framerate_options[] = {
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AVFILTER_DEFINE_CLASS(framerate);
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static void next_source(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int i;
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ff_dlog(ctx, "next_source()\n");
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if (s->srce[s->last] && s->srce[s->last] != s->srce[s->last-1]) {
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ff_dlog(ctx, "next_source() unlink %d\n", s->last);
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av_frame_free(&s->srce[s->last]);
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}
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for (i = s->last; i > s->frst; i--) {
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ff_dlog(ctx, "next_source() copy %d to %d\n", i - 1, i);
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s->srce[i] = s->srce[i - 1];
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s->srce_score[i] = s->srce_score[i - 1];
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}
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ff_dlog(ctx, "next_source() make %d null\n", s->frst);
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s->srce[s->frst] = NULL;
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s->srce_score[s->frst] = -1.0;
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}
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static av_always_inline int64_t sad_8x8_16(const uint16_t *src1, ptrdiff_t stride1,
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const uint16_t *src2, ptrdiff_t stride2)
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{
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@ -307,28 +279,25 @@ static int filter_slice16(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
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return 0;
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}
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static int blend_frames(AVFilterContext *ctx, int interpolate,
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int src1, int src2)
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static int blend_frames(AVFilterContext *ctx, int interpolate)
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{
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FrameRateContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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double interpolate_scene_score = 0;
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if ((s->flags & FRAMERATE_FLAG_SCD) && s->srce[src1] && s->srce[src2]) {
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int i1 = src1 < src2 ? src1 : src2;
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int i2 = src1 < src2 ? src2 : src1;
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if (i2 == i1 + 1 && s->srce_score[i1] >= 0.0)
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interpolate_scene_score = s->srce_score[i1];
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if ((s->flags & FRAMERATE_FLAG_SCD)) {
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if (s->score >= 0.0)
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interpolate_scene_score = s->score;
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else
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interpolate_scene_score = s->srce_score[i1] = get_scene_score(ctx, s->srce[i1], s->srce[i2]);
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interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1);
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ff_dlog(ctx, "blend_frames() interpolate scene score:%f\n", interpolate_scene_score);
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}
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// decide if the shot-change detection allows us to blend two frames
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if (interpolate_scene_score < s->scene_score && s->srce[src2]) {
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if (interpolate_scene_score < s->scene_score) {
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ThreadData td;
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td.copy_src1 = s->srce[src1];
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td.copy_src2 = s->srce[src2];
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td.src2_factor = FFABS(interpolate);
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td.copy_src1 = s->f0;
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td.copy_src2 = s->f1;
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td.src2_factor = interpolate;
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td.src1_factor = s->max - td.src2_factor;
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// get work-space for output frame
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@ -336,7 +305,7 @@ static int blend_frames(AVFilterContext *ctx, int interpolate,
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if (!s->work)
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return AVERROR(ENOMEM);
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av_frame_copy_props(s->work, s->srce[s->crnt]);
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av_frame_copy_props(s->work, s->f0);
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ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
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ctx->internal->execute(ctx, s->bitdepth == 8 ? filter_slice8 : filter_slice16, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
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@ -345,198 +314,65 @@ static int blend_frames(AVFilterContext *ctx, int interpolate,
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return 0;
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}
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static int process_work_frame(AVFilterContext *ctx, int stop)
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static int process_work_frame(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int64_t work_next_pts;
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int64_t work_pts;
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int interpolate;
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int src1, src2;
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int ret;
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ff_dlog(ctx, "process_work_frame()\n");
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ff_dlog(ctx, "process_work_frame() pending_input_frames %d\n", s->pending_srce_frames);
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if (s->srce[s->prev]) ff_dlog(ctx, "process_work_frame() srce prev pts:%"PRId64"\n", s->srce[s->prev]->pts);
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if (s->srce[s->crnt]) ff_dlog(ctx, "process_work_frame() srce crnt pts:%"PRId64"\n", s->srce[s->crnt]->pts);
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if (s->srce[s->next]) ff_dlog(ctx, "process_work_frame() srce next pts:%"PRId64"\n", s->srce[s->next]->pts);
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if (!s->srce[s->crnt]) {
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// the filter cannot do anything
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ff_dlog(ctx, "process_work_frame() no current frame cached: move on to next frame, do not output a frame\n");
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next_source(ctx);
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if (!s->f1)
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return 0;
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}
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work_next_pts = s->pts + s->average_dest_pts_delta;
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ff_dlog(ctx, "process_work_frame() work crnt pts:%"PRId64"\n", s->pts);
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ff_dlog(ctx, "process_work_frame() work next pts:%"PRId64"\n", work_next_pts);
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if (s->srce[s->prev])
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ff_dlog(ctx, "process_work_frame() srce prev pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->prev], s->dest_time_base.num, s->dest_time_base.den);
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if (s->srce[s->crnt])
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ff_dlog(ctx, "process_work_frame() srce crnt pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->crnt], s->dest_time_base.num, s->dest_time_base.den);
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if (s->srce[s->next])
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ff_dlog(ctx, "process_work_frame() srce next pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->next], s->dest_time_base.num, s->dest_time_base.den);
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av_assert0(s->srce[s->next]);
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// should filter be skipping input frame (output frame rate is lower than input frame rate)
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if (!s->flush && s->pts >= s->srce_pts_dest[s->next]) {
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ff_dlog(ctx, "process_work_frame() work crnt pts >= srce next pts: SKIP FRAME, move on to next frame, do not output a frame\n");
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next_source(ctx);
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s->pending_srce_frames--;
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if (!s->f0 && !s->flush)
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return 0;
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}
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// calculate interpolation
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interpolate = av_rescale(s->pts - s->srce_pts_dest[s->crnt], s->max, s->average_srce_pts_dest_delta);
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ff_dlog(ctx, "process_work_frame() interpolate:%d/%d\n", interpolate, s->max);
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src1 = s->crnt;
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if (interpolate > s->interp_end) {
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ff_dlog(ctx, "process_work_frame() source is:NEXT\n");
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src1 = s->next;
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}
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if (s->srce[s->prev] && interpolate < -s->interp_end) {
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ff_dlog(ctx, "process_work_frame() source is:PREV\n");
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src1 = s->prev;
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}
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work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base);
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// decide whether to blend two frames
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if ((interpolate >= s->interp_start && interpolate <= s->interp_end) || (interpolate <= -s->interp_start && interpolate >= -s->interp_end)) {
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if (interpolate > 0) {
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ff_dlog(ctx, "process_work_frame() interpolate source is:NEXT\n");
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src2 = s->next;
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if (work_pts >= s->pts1 && !s->flush)
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return 0;
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if (!s->f0) {
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s->work = av_frame_clone(s->f1);
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} else {
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if (work_pts >= s->pts1 + s->delta && s->flush)
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return 0;
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interpolate = av_rescale(work_pts - s->pts0, s->max, s->delta);
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ff_dlog(ctx, "process_work_frame() interpolate:%d/%d\n", interpolate, s->max);
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if (interpolate > s->interp_end) {
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s->work = av_frame_clone(s->f1);
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} else if (interpolate < s->interp_start) {
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s->work = av_frame_clone(s->f0);
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} else {
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ff_dlog(ctx, "process_work_frame() interpolate source is:PREV\n");
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src2 = s->prev;
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ret = blend_frames(ctx, interpolate);
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if (ret < 0)
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return ret;
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if (ret == 0)
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s->work = av_frame_clone(interpolate > (s->max >> 1) ? s->f1 : s->f0);
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}
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if (blend_frames(ctx, interpolate, src1, src2))
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goto copy_done;
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else
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ff_dlog(ctx, "process_work_frame() CUT - DON'T INTERPOLATE\n");
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}
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ff_dlog(ctx, "process_work_frame() COPY to the work frame\n");
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// copy the frame we decided is our base source
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s->work = av_frame_clone(s->srce[src1]);
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if (!s->work)
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return AVERROR(ENOMEM);
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copy_done:
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s->work->pts = s->pts;
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// should filter be re-using input frame (output frame rate is higher than input frame rate)
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if (!s->flush && (work_next_pts + s->average_dest_pts_delta) < (s->srce_pts_dest[s->crnt] + s->average_srce_pts_dest_delta)) {
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ff_dlog(ctx, "process_work_frame() REPEAT FRAME\n");
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} else {
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ff_dlog(ctx, "process_work_frame() CONSUME FRAME, move to next frame\n");
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s->pending_srce_frames--;
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next_source(ctx);
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}
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ff_dlog(ctx, "process_work_frame() output a frame\n");
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s->dest_frame_num++;
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if (stop)
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s->pending_end_frame = 0;
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s->last_dest_frame_pts = s->work->pts;
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s->work->pts = work_pts;
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s->n++;
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return 1;
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}
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static void set_srce_frame_dest_pts(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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ff_dlog(ctx, "set_srce_frame_output_pts()\n");
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// scale the input pts from the timebase difference between input and output
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if (s->srce[s->prev])
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s->srce_pts_dest[s->prev] = av_rescale_q(s->srce[s->prev]->pts, s->srce_time_base, s->dest_time_base);
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if (s->srce[s->crnt])
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s->srce_pts_dest[s->crnt] = av_rescale_q(s->srce[s->crnt]->pts, s->srce_time_base, s->dest_time_base);
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if (s->srce[s->next])
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s->srce_pts_dest[s->next] = av_rescale_q(s->srce[s->next]->pts, s->srce_time_base, s->dest_time_base);
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}
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static void set_work_frame_pts(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int64_t pts, average_srce_pts_delta = 0;
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ff_dlog(ctx, "set_work_frame_pts()\n");
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av_assert0(s->srce[s->next]);
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av_assert0(s->srce[s->crnt]);
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ff_dlog(ctx, "set_work_frame_pts() srce crnt pts:%"PRId64"\n", s->srce[s->crnt]->pts);
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ff_dlog(ctx, "set_work_frame_pts() srce next pts:%"PRId64"\n", s->srce[s->next]->pts);
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if (s->srce[s->prev])
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ff_dlog(ctx, "set_work_frame_pts() srce prev pts:%"PRId64"\n", s->srce[s->prev]->pts);
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average_srce_pts_delta = s->average_srce_pts_dest_delta;
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ff_dlog(ctx, "set_work_frame_pts() initial average srce pts:%"PRId64"\n", average_srce_pts_delta);
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set_srce_frame_dest_pts(ctx);
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// calculate the PTS delta
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if ((pts = (s->srce_pts_dest[s->next] - s->srce_pts_dest[s->crnt]))) {
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average_srce_pts_delta = average_srce_pts_delta?((average_srce_pts_delta+pts)>>1):pts;
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} else if (s->srce[s->prev] && (pts = (s->srce_pts_dest[s->crnt] - s->srce_pts_dest[s->prev]))) {
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average_srce_pts_delta = average_srce_pts_delta?((average_srce_pts_delta+pts)>>1):pts;
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}
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s->average_srce_pts_dest_delta = average_srce_pts_delta;
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ff_dlog(ctx, "set_work_frame_pts() average srce pts:%"PRId64"\n", average_srce_pts_delta);
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ff_dlog(ctx, "set_work_frame_pts() average srce pts:%"PRId64" at dest time base:%u/%u\n",
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s->average_srce_pts_dest_delta, s->dest_time_base.num, s->dest_time_base.den);
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if (ctx->inputs[0] && !s->average_dest_pts_delta) {
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int64_t d = av_q2d(av_inv_q(av_mul_q(s->dest_time_base, s->dest_frame_rate)));
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s->average_dest_pts_delta = d;
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ff_dlog(ctx, "set_work_frame_pts() average dest pts delta:%"PRId64"\n", s->average_dest_pts_delta);
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}
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if (!s->dest_frame_num) {
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s->pts = s->last_dest_frame_pts = s->srce_pts_dest[s->crnt];
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} else {
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s->pts = s->last_dest_frame_pts + s->average_dest_pts_delta;
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}
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ff_dlog(ctx, "set_work_frame_pts() calculated pts:%"PRId64" at dest time base:%u/%u\n",
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s->pts, s->dest_time_base.num, s->dest_time_base.den);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int i;
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s->dest_frame_num = 0;
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s->crnt = (N_SRCE)>>1;
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s->last = N_SRCE - 1;
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s->next = s->crnt - 1;
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s->prev = s->crnt + 1;
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for (i = 0; i < N_SRCE; i++)
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s->srce_score[i] = -1.0;
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s->start_pts = AV_NOPTS_VALUE;
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int i;
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for (i = s->frst; i < s->last; i++) {
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if (s->srce[i] && (s->srce[i] != s->srce[i + 1]))
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av_frame_free(&s->srce[i]);
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}
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av_frame_free(&s->srce[s->last]);
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av_frame_free(&s->f0);
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av_frame_free(&s->f1);
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}
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static int query_formats(AVFilterContext *ctx)
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@ -593,28 +429,48 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
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int ret;
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AVFilterContext *ctx = inlink->dst;
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FrameRateContext *s = ctx->priv;
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// we have one new frame
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s->pending_srce_frames++;
|
||||
int64_t pts;
|
||||
|
||||
if (inpicref->interlaced_frame)
|
||||
av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
|
||||
|
||||
// store the pointer to the new frame
|
||||
av_frame_free(&s->srce[s->frst]);
|
||||
s->srce[s->frst] = inpicref;
|
||||
|
||||
if (!s->pending_end_frame && s->srce[s->crnt]) {
|
||||
set_work_frame_pts(ctx);
|
||||
s->pending_end_frame = 1;
|
||||
} else {
|
||||
set_srce_frame_dest_pts(ctx);
|
||||
if (inpicref->pts == AV_NOPTS_VALUE) {
|
||||
av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
ret = process_work_frame(ctx, 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
return ret ? ff_filter_frame(ctx->outputs[0], s->work) : 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)
|
||||
|
|
@ -666,50 +522,21 @@ static int request_frame(AVFilterLink *outlink)
|
|||
{
|
||||
AVFilterContext *ctx = outlink->src;
|
||||
FrameRateContext *s = ctx->priv;
|
||||
int ret, i;
|
||||
int ret;
|
||||
|
||||
ff_dlog(ctx, "request_frame()\n");
|
||||
|
||||
// if there is no "next" frame AND we are not in flush then get one from our input filter
|
||||
if (!s->srce[s->frst] && !s->flush)
|
||||
goto request;
|
||||
|
||||
ff_dlog(ctx, "request_frame() REPEAT or FLUSH\n");
|
||||
|
||||
if (s->pending_srce_frames <= 0) {
|
||||
ff_dlog(ctx, "request_frame() nothing else to do, return:EOF\n");
|
||||
return AVERROR_EOF;
|
||||
}
|
||||
|
||||
// otherwise, make brand-new frame and pass to our output filter
|
||||
ff_dlog(ctx, "request_frame() FLUSH\n");
|
||||
|
||||
// back fill at end of file when source has no more frames
|
||||
for (i = s->last; i > s->frst; i--) {
|
||||
if (!s->srce[i - 1] && s->srce[i]) {
|
||||
ff_dlog(ctx, "request_frame() copy:%d to:%d\n", i, i - 1);
|
||||
s->srce[i - 1] = s->srce[i];
|
||||
}
|
||||
}
|
||||
|
||||
set_work_frame_pts(ctx);
|
||||
ret = process_work_frame(ctx, 0);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (ret)
|
||||
return ff_filter_frame(ctx->outputs[0], s->work);
|
||||
|
||||
request:
|
||||
ff_dlog(ctx, "request_frame() call source's request_frame()\n");
|
||||
ret = ff_request_frame(ctx->inputs[0]);
|
||||
if (ret < 0 && (ret != AVERROR_EOF)) {
|
||||
ff_dlog(ctx, "request_frame() source's request_frame() returned error:%d\n", ret);
|
||||
return ret;
|
||||
} else if (ret == AVERROR_EOF) {
|
||||
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 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const AVFilterPad framerate_inputs[] = {
|
||||
|
|
|
|||
|
|
@ -62,3 +62,4 @@
|
|||
0, 56, 56, 1, 307200, 0x8cf55128
|
||||
0, 57, 57, 1, 307200, 0x4e740b42
|
||||
0, 58, 58, 1, 307200, 0x8e7e705c
|
||||
0, 59, 59, 1, 307200, 0xe73f29ef
|
||||
|
|
|
|||
Loading…
Reference in New Issue