コード例 #1
0
ファイル: video.c プロジェクト: c-14/mpv
// Move the frame in next_frame[1] to next_frame[0]. This makes the frame
// "known" to the playback logic. A frame in next_frame[0] is either "known" or
// NULL, so the moving must always be done by this function.
static void shift_new_frame(struct MPContext *mpctx)
{
    if (mpctx->next_frame[0] || !mpctx->next_frame[1])
        return;

    mpctx->next_frame[0] = mpctx->next_frame[1];
    mpctx->next_frame[1] = NULL;

    double frame_time = 0;
    double pts = mpctx->next_frame[0]->pts;
    if (mpctx->video_pts != MP_NOPTS_VALUE) {
        frame_time = pts - mpctx->video_pts;
        double tolerance = 15;
        if (mpctx->demuxer->ts_resets_possible) {
            // Fortunately no real framerate is likely to go below this. It
            // still could be that the file is VFR, but the demuxer reports a
            // higher rate, so account for the case of e.g. 60hz demuxer fps
            // but 23hz actual fps.
            double fps = 23.976;
            if (mpctx->d_video->fps > 0 && mpctx->d_video->fps < fps)
                fps = mpctx->d_video->fps;
            tolerance = 3 * 1.0 / fps;
        }
        if (frame_time <= 0 || frame_time >= tolerance) {
            // Assume a discontinuity.
            MP_WARN(mpctx, "Invalid video timestamp: %f -> %f\n",
                    mpctx->video_pts, pts);
            frame_time = 0;
            mpctx->audio_status = STATUS_SYNCING;
        }
    }
    mpctx->video_next_pts = pts;
    mpctx->delay -= frame_time;
    if (mpctx->video_status >= STATUS_PLAYING) {
        mpctx->time_frame += frame_time / mpctx->opts->playback_speed;
        adjust_sync(mpctx, pts, frame_time);
    }
    mpctx->dropped_frames = 0;
    MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);
}
コード例 #2
0
ファイル: video.c プロジェクト: xnoreq/mpv
// Fill mpctx->next_frame[] with a newly filtered or decoded image.
// returns VD_* code
static int video_output_image(struct MPContext *mpctx, double endpts)
{
    bool hrseek = mpctx->hrseek_active && mpctx->video_status == STATUS_SYNCING;

    if (mpctx->d_video->header->attached_picture) {
        if (vo_has_frame(mpctx->video_out))
            return VD_EOF;
        if (mpctx->next_frame[0])
            return VD_NEW_FRAME;
        int r = video_decode_and_filter(mpctx);
        video_filter(mpctx, true); // force EOF filtering (avoid decoding more)
        mpctx->next_frame[0] = vf_read_output_frame(mpctx->d_video->vfilter);
        if (mpctx->next_frame[0])
            mpctx->next_frame[0]->pts = MP_NOPTS_VALUE;
        return r <= 0 ? VD_EOF : VD_PROGRESS;
    }

    if (have_new_frame(mpctx))
        return VD_NEW_FRAME;

    if (!mpctx->next_frame[0] && mpctx->next_frame[1]) {
        mpctx->next_frame[0] = mpctx->next_frame[1];
        mpctx->next_frame[1] = NULL;

        double pts = mpctx->next_frame[0]->pts;
        double last_pts = mpctx->video_pts;
        if (last_pts == MP_NOPTS_VALUE)
            last_pts = pts;
        double frame_time = pts - last_pts;
        if (frame_time < 0 || frame_time >= 60) {
            // Assume a PTS difference >= 60 seconds is a discontinuity.
            MP_WARN(mpctx, "Jump in video pts: %f -> %f\n", last_pts, pts);
            frame_time = 0;
        }
        mpctx->video_next_pts = pts;
        if (mpctx->d_audio)
            mpctx->delay -= frame_time;
        if (mpctx->video_status >= STATUS_READY) {
            mpctx->time_frame += frame_time / mpctx->opts->playback_speed;
            adjust_sync(mpctx, pts, frame_time);
        }
        mpctx->dropped_frames = 0;
        MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);
    }

    if (have_new_frame(mpctx))
        return VD_NEW_FRAME;

    // Get a new frame if we need one.
    int r = VD_PROGRESS;
    if (!mpctx->next_frame[1]) {
        // Filter a new frame.
        r = video_decode_and_filter(mpctx);
        if (r < 0)
            return r; // error
        struct mp_image *img = vf_read_output_frame(mpctx->d_video->vfilter);
        if (img) {
            // Always add these; they make backstepping after seeking faster.
            add_frame_pts(mpctx, img->pts);

            bool drop = false;
            if ((endpts != MP_NOPTS_VALUE && img->pts >= endpts) ||
                mpctx->max_frames == 0)
            {
                drop = true;
                r = VD_EOF;
            }
            if (!drop && hrseek && mpctx->hrseek_lastframe) {
                mp_image_setrefp(&mpctx->saved_frame, img);
                drop = true;
            }
            if (hrseek && img->pts < mpctx->hrseek_pts - .005)
                drop = true;
            if (drop) {
                talloc_free(img);
            } else {
                mpctx->next_frame[1] = img;
            }
        }
    }

    // On EOF, always allow the playloop to use the remaining frame.
    if (have_new_frame(mpctx) || (r <= 0 && mpctx->next_frame[0]))
        return VD_NEW_FRAME;

    // Last-frame seek
    if (r <= 0 && hrseek && mpctx->hrseek_lastframe && mpctx->saved_frame) {
        mpctx->next_frame[1] = mpctx->saved_frame;
        mpctx->saved_frame = NULL;
        return VD_PROGRESS;
    }

    return r;
}
コード例 #3
0
ファイル: video.c プロジェクト: NeilBINGOHIT/mpv
int reinit_video_chain(struct MPContext *mpctx)
{
    struct MPOpts *opts = mpctx->opts;
    assert(!mpctx->d_video);
    struct track *track = mpctx->current_track[0][STREAM_VIDEO];
    struct sh_stream *sh = track ? track->stream : NULL;
    if (!sh)
        goto no_video;

    MP_VERBOSE(mpctx, "[V] fourcc:0x%X  size:%dx%d  fps:%5.3f\n",
               sh->format,
               sh->video->disp_w, sh->video->disp_h,
               sh->video->fps);

    //================== Init VIDEO (codec & libvo) ==========================
    if (!mpctx->video_out) {
        struct vo_extra ex = {
            .input_ctx = mpctx->input,
            .osd = mpctx->osd,
            .encode_lavc_ctx = mpctx->encode_lavc_ctx,
            .opengl_cb_context = mpctx->gl_cb_ctx,
        };
        mpctx->video_out = init_best_video_out(mpctx->global, &ex);
        if (!mpctx->video_out) {
            MP_FATAL(mpctx, "Error opening/initializing "
                    "the selected video_out (-vo) device.\n");
            mpctx->error_playing = MPV_ERROR_VO_INIT_FAILED;
            goto err_out;
        }
        mpctx->mouse_cursor_visible = true;
    }

    update_window_title(mpctx, true);

    struct dec_video *d_video = talloc_zero(NULL, struct dec_video);
    mpctx->d_video = d_video;
    d_video->global = mpctx->global;
    d_video->log = mp_log_new(d_video, mpctx->log, "!vd");
    d_video->opts = mpctx->opts;
    d_video->header = sh;
    d_video->fps = sh->video->fps;
    d_video->vo = mpctx->video_out;

    MP_VERBOSE(d_video, "Container reported FPS: %f\n", sh->video->fps);

    if (opts->force_fps) {
        d_video->fps = opts->force_fps;
        MP_INFO(mpctx, "FPS forced to %5.3f.\n", d_video->fps);
        MP_INFO(mpctx, "Use --no-correct-pts to force FPS based timing.\n");
    }

#if HAVE_ENCODING
    if (mpctx->encode_lavc_ctx && d_video)
        encode_lavc_set_video_fps(mpctx->encode_lavc_ctx, d_video->fps);
#endif

    vo_control(mpctx->video_out, VOCTRL_GET_HWDEC_INFO, &d_video->hwdec_info);

    recreate_video_filters(mpctx);

    if (!video_init_best_codec(d_video, opts->video_decoders))
        goto err_out;

    bool saver_state = opts->pause || !opts->stop_screensaver;
    vo_control(mpctx->video_out, saver_state ? VOCTRL_RESTORE_SCREENSAVER
                                             : VOCTRL_KILL_SCREENSAVER, NULL);

    vo_set_paused(mpctx->video_out, mpctx->paused);

    mpctx->sync_audio_to_video = !sh->attached_picture;
    mpctx->vo_pts_history_seek_ts++;

    // If we switch on video again, ensure audio position matches up.
    if (mpctx->d_audio)
        mpctx->audio_status = STATUS_SYNCING;

    reset_video_state(mpctx);
    reset_subtitle_state(mpctx);

    return 1;

err_out:
no_video:
    uninit_video_chain(mpctx);
    if (track)
        error_on_track(mpctx, track);
    handle_force_window(mpctx, true);
    return 0;
}

// Try to refresh the video by doing a precise seek to the currently displayed
// frame. This can go wrong in all sorts of ways, so use sparingly.
void mp_force_video_refresh(struct MPContext *mpctx)
{
    struct MPOpts *opts = mpctx->opts;
    struct dec_video *d_video = mpctx->d_video;

    if (!d_video || !d_video->decoder_output.imgfmt)
        return;

    // If not paused, the next frame should come soon enough.
    if (opts->pause && mpctx->last_vo_pts != MP_NOPTS_VALUE) {
        queue_seek(mpctx, MPSEEK_ABSOLUTE, mpctx->last_vo_pts,
                   MPSEEK_VERY_EXACT, true);
    }
}

static int check_framedrop(struct MPContext *mpctx)
{
    struct MPOpts *opts = mpctx->opts;
    // check for frame-drop:
    if (mpctx->video_status == STATUS_PLAYING && !mpctx->paused &&
        mpctx->audio_status == STATUS_PLAYING && !ao_untimed(mpctx->ao))
    {
        float fps = mpctx->d_video->fps;
        double frame_time = fps > 0 ? 1.0 / fps : 0;
        // we should avoid dropping too many frames in sequence unless we
        // are too late. and we allow 100ms A-V delay here:
        if (mpctx->last_av_difference - 0.100 > mpctx->dropped_frames * frame_time)
            return !!(opts->frame_dropping & 2);
    }
    return 0;
}

// Read a packet, store decoded image into d_video->waiting_decoded_mpi
// returns VD_* code
static int decode_image(struct MPContext *mpctx)
{
    struct dec_video *d_video = mpctx->d_video;

    if (d_video->header->attached_picture) {
        d_video->waiting_decoded_mpi =
                    video_decode(d_video, d_video->header->attached_picture, 0);
        return d_video->waiting_decoded_mpi ? VD_EOF : VD_PROGRESS;
    }

    struct demux_packet *pkt;
    if (demux_read_packet_async(d_video->header, &pkt) == 0)
        return VD_WAIT;
    if (pkt && pkt->pts != MP_NOPTS_VALUE)
        pkt->pts += mpctx->video_offset;
    if (pkt && pkt->dts != MP_NOPTS_VALUE)
        pkt->dts += mpctx->video_offset;
    if ((pkt && pkt->pts >= mpctx->hrseek_pts - .005) ||
        d_video->has_broken_packet_pts ||
        !mpctx->opts->hr_seek_framedrop)
    {
        mpctx->hrseek_framedrop = false;
    }
    bool hrseek = mpctx->hrseek_active && mpctx->video_status == STATUS_SYNCING;
    int framedrop_type = hrseek && mpctx->hrseek_framedrop ?
                         2 : check_framedrop(mpctx);
    d_video->waiting_decoded_mpi =
        video_decode(d_video, pkt, framedrop_type);
    bool had_packet = !!pkt;
    talloc_free(pkt);

    if (had_packet && !d_video->waiting_decoded_mpi &&
        mpctx->video_status == STATUS_PLAYING &&
        (mpctx->opts->frame_dropping & 2))
    {
        mpctx->dropped_frames_total++;
        mpctx->dropped_frames++;
    }

    return had_packet ? VD_PROGRESS : VD_EOF;
}


// Called after video reinit. This can be generally used to try to insert more
// filters using the filter chain edit functionality in command.c.
static void init_filter_params(struct MPContext *mpctx)
{
    struct MPOpts *opts = mpctx->opts;

    // Note that the filter chain is already initialized. This code might
    // recreate the chain a second time, which is not very elegant, but allows
    // us to test whether enabling deinterlacing works with the current video
    // format and other filters.
    if (opts->deinterlace >= 0)
        mp_property_do("deinterlace", M_PROPERTY_SET, &opts->deinterlace, mpctx);
}

// Feed newly decoded frames to the filter, take care of format changes.
// If eof=true, drain the filter chain, and return VD_EOF if empty.
static int video_filter(struct MPContext *mpctx, bool eof)
{
    struct dec_video *d_video = mpctx->d_video;
    struct vf_chain *vf = d_video->vfilter;

    if (vf->initialized < 0)
        return VD_ERROR;

    // There is already a filtered frame available.
    // If vf_needs_input() returns > 0, the filter wants input anyway.
    if (vf_output_frame(vf, eof) > 0 && vf_needs_input(vf) < 1)
        return VD_PROGRESS;

    // Decoder output is different from filter input?
    bool need_vf_reconfig = !vf->input_params.imgfmt || vf->initialized < 1 ||
        !mp_image_params_equal(&d_video->decoder_output, &vf->input_params);

    // (If imgfmt==0, nothing was decoded yet, and the format is unknown.)
    if (need_vf_reconfig && d_video->decoder_output.imgfmt) {
        // Drain the filter chain.
        if (vf_output_frame(vf, true) > 0)
            return VD_PROGRESS;

        // The filter chain is drained; execute the filter format change.
        filter_reconfig(mpctx, false);
        if (vf->initialized == 0)
            return VD_PROGRESS; // hw decoding fallback; try again
        if (vf->initialized < 1)
            return VD_ERROR;
        init_filter_params(mpctx);
        return VD_RECONFIG;
    }

    // If something was decoded, and the filter chain is ready, filter it.
    if (!need_vf_reconfig && d_video->waiting_decoded_mpi) {
        vf_filter_frame(vf, d_video->waiting_decoded_mpi);
        d_video->waiting_decoded_mpi = NULL;
        return VD_PROGRESS;
    }

    return eof ? VD_EOF : VD_PROGRESS;
}

// Make sure at least 1 filtered image is available, decode new video if needed.
// returns VD_* code
// A return value of VD_PROGRESS doesn't necessarily output a frame, but makes
// the promise that calling this function again will eventually do something.
static int video_decode_and_filter(struct MPContext *mpctx)
{
    struct dec_video *d_video = mpctx->d_video;

    int r = video_filter(mpctx, false);
    if (r < 0)
        return r;

    if (!d_video->waiting_decoded_mpi) {
        // Decode a new image, or at least feed the decoder a packet.
        r = decode_image(mpctx);
        if (r == VD_WAIT)
            return r;
        if (d_video->waiting_decoded_mpi)
            d_video->decoder_output = d_video->waiting_decoded_mpi->params;
    }

    bool eof = !d_video->waiting_decoded_mpi && (r == VD_EOF || r < 0);
    r = video_filter(mpctx, eof);
    if (r == VD_RECONFIG) // retry feeding decoded image
        r = video_filter(mpctx, eof);
    return r;
}

static int video_feed_async_filter(struct MPContext *mpctx)
{
    struct dec_video *d_video = mpctx->d_video;
    struct vf_chain *vf = d_video->vfilter;

    if (vf->initialized < 0)
        return VD_ERROR;

    if (vf_needs_input(vf) < 1)
        return 0;
    mpctx->sleeptime = 0; // retry until done
    return video_decode_and_filter(mpctx);
}

/* Modify video timing to match the audio timeline. There are two main
 * reasons this is needed. First, video and audio can start from different
 * positions at beginning of file or after a seek (MPlayer starts both
 * immediately even if they have different pts). Second, the file can have
 * audio timestamps that are inconsistent with the duration of the audio
 * packets, for example two consecutive timestamp values differing by
 * one second but only a packet with enough samples for half a second
 * of playback between them.
 */
static void adjust_sync(struct MPContext *mpctx, double v_pts, double frame_time)
{
    struct MPOpts *opts = mpctx->opts;

    if (mpctx->audio_status != STATUS_PLAYING)
        return;

    double a_pts = written_audio_pts(mpctx) + opts->audio_delay - mpctx->delay;
    double av_delay = a_pts - v_pts;

    double change = av_delay * 0.1;
    double max_change = opts->default_max_pts_correction >= 0 ?
                        opts->default_max_pts_correction : frame_time * 0.1;
    if (change < -max_change)
        change = -max_change;
    else if (change > max_change)
        change = max_change;
    mpctx->delay += change;
    mpctx->total_avsync_change += change;
}

// Move the frame in next_frame[1] to next_frame[0]. This makes the frame
// "known" to the playback logic. A frame in next_frame[0] is either "known" or
// NULL, so the moving must always be done by this function.
static void shift_new_frame(struct MPContext *mpctx)
{
    if (mpctx->next_frame[0] || !mpctx->next_frame[1])
        return;

    mpctx->next_frame[0] = mpctx->next_frame[1];
    mpctx->next_frame[1] = NULL;

    double frame_time = 0;
    double pts = mpctx->next_frame[0]->pts;
    if (mpctx->video_pts != MP_NOPTS_VALUE) {
        frame_time = pts - mpctx->video_pts;
        double tolerance = 15;
        if (mpctx->demuxer->ts_resets_possible) {
            // Fortunately no real framerate is likely to go below this. It
            // still could be that the file is VFR, but the demuxer reports a
            // higher rate, so account for the case of e.g. 60hz demuxer fps
            // but 23hz actual fps.
            double fps = 23.976;
            if (mpctx->d_video->fps > 0 && mpctx->d_video->fps < fps)
                fps = mpctx->d_video->fps;
            tolerance = 3 * 1.0 / fps;
        }
        if (frame_time <= 0 || frame_time >= tolerance) {
            // Assume a discontinuity.
            MP_WARN(mpctx, "Invalid video timestamp: %f -> %f\n",
                    mpctx->video_pts, pts);
            frame_time = 0;
            mpctx->audio_status = STATUS_SYNCING;
        }
    }
    mpctx->video_next_pts = pts;
    mpctx->delay -= frame_time;
    if (mpctx->video_status >= STATUS_PLAYING) {
        mpctx->time_frame += frame_time / mpctx->opts->playback_speed;
        adjust_sync(mpctx, pts, frame_time);
    }
    mpctx->dropped_frames = 0;
    MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);
}

// Whether it's fine to call add_new_frame() now.
static bool needs_new_frame(struct MPContext *mpctx)
{
    return !mpctx->next_frame[1];
}

// Queue a frame to mpctx->next_frame[]. Call only if needs_new_frame() signals ok.
static void add_new_frame(struct MPContext *mpctx, struct mp_image *frame)
{
    assert(needs_new_frame(mpctx));
    assert(frame);
    mpctx->next_frame[1] = frame;
    shift_new_frame(mpctx);
}
コード例 #4
0
ファイル: video.c プロジェクト: jeremiejig/mpv
void write_video(struct MPContext *mpctx, double endpts)
{
    struct MPOpts *opts = mpctx->opts;
    struct vo *vo = mpctx->video_out;

    if (!mpctx->d_video)
        return;

    update_fps(mpctx);

    // Whether there's still at least 1 video frame that can be shown.
    // If false, it means we can reconfig the VO if needed (normally, this
    // would disrupt playback, so only do it on !still_playing).
    bool still_playing = vo_has_next_frame(vo, true);
    // For the last frame case (frame is being displayed).
    still_playing |= mpctx->playing_last_frame;
    still_playing |= mpctx->last_frame_duration > 0;

    double frame_time = 0;
    int r = update_video(mpctx, endpts, !still_playing, &frame_time);
    MP_TRACE(mpctx, "update_video: %d (still_playing=%d)\n", r, still_playing);

    if (r == VD_WAIT) // Demuxer will wake us up for more packets to decode.
        return;

    if (r < 0) {
        MP_FATAL(mpctx, "Could not initialize video chain.\n");
        int uninit = INITIALIZED_VCODEC;
        if (!opts->force_vo)
            uninit |= INITIALIZED_VO;
        uninit_player(mpctx, uninit);
        if (!mpctx->current_track[STREAM_AUDIO])
            mpctx->stop_play = PT_NEXT_ENTRY;
        mpctx->error_playing = true;
        handle_force_window(mpctx, true);
        return; // restart loop
    }

    if (r == VD_EOF) {
        if (!mpctx->playing_last_frame && mpctx->last_frame_duration > 0) {
            mpctx->time_frame += mpctx->last_frame_duration;
            mpctx->last_frame_duration = 0;
            mpctx->playing_last_frame = true;
            MP_VERBOSE(mpctx, "showing last frame\n");
        }
    }

    if (r == VD_NEW_FRAME) {
        MP_TRACE(mpctx, "frametime=%5.3f\n", frame_time);

        if (mpctx->video_status > STATUS_PLAYING)
            mpctx->video_status = STATUS_PLAYING;

        if (mpctx->video_status >= STATUS_READY) {
            mpctx->time_frame += frame_time / opts->playback_speed;
            adjust_sync(mpctx, frame_time);
        }
    } else if (r == VD_EOF && mpctx->playing_last_frame) {
        // Let video timing code continue displaying.
        mpctx->video_status = STATUS_DRAINING;
        MP_VERBOSE(mpctx, "still showing last frame\n");
    } else if (r <= 0) {
        // EOF or error
        mpctx->delay = 0;
        mpctx->last_av_difference = 0;
        mpctx->video_status = STATUS_EOF;
        MP_VERBOSE(mpctx, "video EOF\n");
        return;
    } else {
        if (mpctx->video_status > STATUS_PLAYING)
            mpctx->video_status = STATUS_PLAYING;

        // Decode more in next iteration.
        mpctx->sleeptime = 0;
        MP_TRACE(mpctx, "filtering more video\n");
    }

    // Actual playback starts when both audio and video are ready.
    if (mpctx->video_status == STATUS_READY)
        return;

    if (mpctx->paused && mpctx->video_status >= STATUS_READY)
        return;

    mpctx->time_frame -= get_relative_time(mpctx);
    double audio_pts = playing_audio_pts(mpctx);
    if (!mpctx->sync_audio_to_video || mpctx->video_status < STATUS_READY) {
        mpctx->time_frame = 0;
    } else if (mpctx->audio_status == STATUS_PLAYING &&
               mpctx->video_status == STATUS_PLAYING)
    {
        double buffered_audio = ao_get_delay(mpctx->ao);
        MP_TRACE(mpctx, "audio delay=%f\n", buffered_audio);

        if (opts->autosync) {
            /* Smooth reported playback position from AO by averaging
             * it with the value expected based on previus value and
             * time elapsed since then. May help smooth video timing
             * with audio output that have inaccurate position reporting.
             * This is badly implemented; the behavior of the smoothing
             * now undesirably depends on how often this code runs
             * (mainly depends on video frame rate). */
            float predicted = (mpctx->delay / opts->playback_speed +
                                mpctx->time_frame);
            float difference = buffered_audio - predicted;
            buffered_audio = predicted + difference / opts->autosync;
        }

        mpctx->time_frame = (buffered_audio -
                                mpctx->delay / opts->playback_speed);
    } else {
        /* If we're more than 200 ms behind the right playback
         * position, don't try to speed up display of following
         * frames to catch up; continue with default speed from
         * the current frame instead.
         * If untimed is set always output frames immediately
         * without sleeping.
         */
        if (mpctx->time_frame < -0.2 || opts->untimed || vo->untimed)
            mpctx->time_frame = 0;
    }

    double vsleep = mpctx->time_frame - vo->flip_queue_offset;
    if (vsleep > 0.050) {
        mpctx->sleeptime = MPMIN(mpctx->sleeptime, vsleep - 0.040);
        return;
    }
    mpctx->sleeptime = 0;
    mpctx->playing_last_frame = false;

    // last frame case
    if (r != VD_NEW_FRAME)
        return;

    //=================== FLIP PAGE (VIDEO BLT): ======================


    mpctx->video_pts = mpctx->video_next_pts;
    mpctx->last_vo_pts = mpctx->video_pts;
    mpctx->playback_pts = mpctx->video_pts;

    update_subtitles(mpctx);
    update_osd_msg(mpctx);

    MP_STATS(mpctx, "vo draw frame");

    vo_new_frame_imminent(vo);

    MP_STATS(mpctx, "vo sleep");

    mpctx->time_frame -= get_relative_time(mpctx);
    mpctx->time_frame -= vo->flip_queue_offset;
    if (mpctx->time_frame > 0.001)
        mpctx->time_frame = timing_sleep(mpctx, mpctx->time_frame);
    mpctx->time_frame += vo->flip_queue_offset;

    int64_t t2 = mp_time_us();
    /* Playing with playback speed it's possible to get pathological
     * cases with mpctx->time_frame negative enough to cause an
     * overflow in pts_us calculation, thus the MPMAX. */
    double time_frame = MPMAX(mpctx->time_frame, -1);
    int64_t pts_us = mpctx->last_time + time_frame * 1e6;
    int duration = -1;
    double pts2 = vo_get_next_pts(vo, 0); // this is the next frame PTS
    if (mpctx->video_pts != MP_NOPTS_VALUE && pts2 == MP_NOPTS_VALUE) {
        // Make up a frame duration. Using the frame rate is not a good
        // choice, since the frame rate could be unset/broken/random.
        float fps = mpctx->d_video->fps;
        double frame_duration = fps > 0 ? 1.0 / fps : 0;
        pts2 = mpctx->video_pts + MPCLAMP(frame_duration, 0.0, 5.0);
    }
    if (pts2 != MP_NOPTS_VALUE) {
        // expected A/V sync correction is ignored
        double diff = (pts2 - mpctx->video_pts);
        diff /= opts->playback_speed;
        if (mpctx->time_frame < 0)
            diff += mpctx->time_frame;
        if (diff < 0)
            diff = 0;
        if (diff > 10)
            diff = 10;
        duration = diff * 1e6;
        mpctx->last_frame_duration = diff;
    }
    if (mpctx->video_status != STATUS_PLAYING)
        duration = -1;

    MP_STATS(mpctx, "start flip");
    vo_flip_page(vo, pts_us | 1, duration);
    MP_STATS(mpctx, "end flip");

    if (audio_pts != MP_NOPTS_VALUE)
        MP_STATS(mpctx, "value %f ptsdiff", mpctx->video_pts - audio_pts);

    mpctx->last_vo_flip_duration = (mp_time_us() - t2) * 0.000001;
    if (vo->driver->flip_page_timed) {
        // No need to adjust sync based on flip speed
        mpctx->last_vo_flip_duration = 0;
        // For print_status - VO call finishing early is OK for sync
        mpctx->time_frame -= get_relative_time(mpctx);
    }
    mpctx->shown_vframes++;
    if (mpctx->video_status < STATUS_PLAYING)
        mpctx->video_status = STATUS_READY;
    update_avsync(mpctx);
    screenshot_flip(mpctx);

    mp_notify(mpctx, MPV_EVENT_TICK, NULL);

    if (!mpctx->sync_audio_to_video)
        mpctx->video_status = STATUS_EOF;
}