C++ (Cpp) avfilter_ref_pic Examples

Example #1

File: vsrc_buffer.c Project: csd/ffmpeg

static int request_frame(AVFilterLink *link)
{
    BufferSourceContext *c = link->src->priv;
    AVFilterPicRef *picref;

    if (!c->has_frame) {
        av_log(link->src, AV_LOG_ERROR,
               "request_frame() called with no available frame!\n");
        //return -1;
    }

    /* This picture will be needed unmodified later for decoding the next
     * frame */
    picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
                                       AV_PERM_REUSE2,
                                       link->w, link->h);

    av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
                    picref->pic->format, link->w, link->h);

    picref->pts             = c->pts;
    picref->pixel_aspect    = c->pixel_aspect;
    picref->interlaced      = c->frame.interlaced_frame;
    picref->top_field_first = c->frame.top_field_first;
    avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
    avfilter_draw_slice(link, 0, link->h, 1);
    avfilter_end_frame(link);
    avfilter_unref_pic(picref);

    c->has_frame = 0;

    return 0;
}

Example #2

File: vf_crop.c Project: CodeAsm/ffplay360

static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
    CropContext *crop = link->dst->priv;
    AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);

#ifdef _MSC_VER
	AVPixFmtDescriptor *av_pix_fmt_descriptors = get_av_pix_fmt_descriptors();
#endif

    int i;

    ref2->w        = crop->w;
    ref2->h        = crop->h;

    ref2->data[0] += crop->y * ref2->linesize[0];
    ref2->data[0] += (crop->x * crop->bpp) >> 3;

    if (!(av_pix_fmt_descriptors[link->format].flags & PIX_FMT_PAL)) {
        for (i = 1; i < 3; i ++) {
            if (ref2->data[i]) {
                ref2->data[i] += (crop->y >> crop->vsub) * ref2->linesize[i];
                ref2->data[i] += ((crop->x * crop->bpp) >> 3) >> crop->hsub;
            }
        }
    }

Example #3

File: defaults.c Project: Akuaksh/soc

void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
    AVFilterLink *out = NULL;

    if(link->dst->output_count)
        out = link->dst->outputs[0];

    if(out) {
        out->outpic      = avfilter_get_video_buffer(out, AV_PERM_WRITE);
        out->outpic->pts = picref->pts;
        avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0));
    }
}

Example #4

File: vf_transpose.c Project: Alwnikrotikz/servetome

static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
    AVFilterLink *out = link->dst->outputs[0];

    out->outpic      = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);
    out->outpic->pts = picref->pts;

    if(picref->pixel_aspect.num == 0) {
        out->outpic->pixel_aspect = picref->pixel_aspect;
    } else {
        out->outpic->pixel_aspect.num = picref->pixel_aspect.den;
        out->outpic->pixel_aspect.den = picref->pixel_aspect.num;
    }

    avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0));
}

Example #5

File: defaults.c Project: WangCrystal/FFplayer

void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
    AVFilterLink *out = NULL;

    if(link->dst->output_count)
        out = link->dst->outputs[0];

    if(out) {
        out->outpic      = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);
        out->outpic->pts = picref->pts;
        out->outpic->pos = picref->pos;
        out->outpic->pixel_aspect = picref->pixel_aspect;
        out->outpic->interlaced      = picref->interlaced;
        out->outpic->top_field_first = picref->top_field_first;
        avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0));
    }
}

Example #6

File: vf_crop.c Project: ericma2014/IvyVideo

static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
    CropContext *crop = link->dst->priv;
    AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);
    int i;

    ref2->w        = crop->w;
    ref2->h        = crop->h;

    ref2->data[0] += crop->y * ref2->linesize[0];
    ref2->data[0] += (crop->x * crop->bpp) >> 3;

    if (link->format != PIX_FMT_PAL8      &&
        link->format != PIX_FMT_BGR4_BYTE &&
        link->format != PIX_FMT_RGB4_BYTE &&
        link->format != PIX_FMT_BGR8      &&
        link->format != PIX_FMT_RGB8) {
        for (i = 1; i < 3; i ++) {
            if (ref2->data[i]) {
                ref2->data[i] += (crop->y >> crop->vsub) * ref2->linesize[i];
                ref2->data[i] += ((crop->x * crop->bpp) >> 3) >> crop->hsub;
            }
        }
    }

Example #7

File: vf_fps.c Project: hemanthm/ffmpeg-soc

static int request_frame(AVFilterLink *link)
{
    FPSContext *fps = link->src->priv;

    if (fps->videoend)
        return -1;

    if (!fps->has_frame) // support for filtering without poll_frame usage
        while(!fps->pic || fps->pic->pts < fps->pts)
            if(avfilter_request_frame(link->src->inputs[0]))
                return -1;

    fps->has_frame=0;
    avfilter_start_frame(link, avfilter_ref_pic(fps->pic, ~AV_PERM_WRITE));
    avfilter_draw_slice (link, 0, fps->pic->h, 1);
    avfilter_end_frame  (link);

    avfilter_unref_pic(fps->pic);
    fps->pic = NULL;

    fps->pts += fps->timebase;

    return 0;
}