#define HIST_SIZE (3*256)
struct thumb_frame {
- AVFilterBufferRef *buf; ///< cached frame
+ AVFrame *buf; ///< cached frame
int histogram[HIST_SIZE]; ///< RGB color distribution histogram of the frame
};
return sum_sq_err;
}
-static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
int i, j, best_frame_idx = 0;
double avg_hist[HIST_SIZE] = {0}, sq_err, min_sq_err = -1;
AVFilterContext *ctx = inlink->dst;
ThumbContext *thumb = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
- AVFilterBufferRef *picref;
+ AVFrame *picref;
int *hist = thumb->frames[thumb->n].histogram;
const uint8_t *p = frame->data[0];
memset(thumb->frames[i].histogram, 0, sizeof(thumb->frames[i].histogram));
if (i == best_frame_idx)
continue;
- avfilter_unref_bufferp(&thumb->frames[i].buf);
+ av_frame_unref(thumb->frames[i].buf);
}
thumb->n = 0;
int i;
ThumbContext *thumb = ctx->priv;
for (i = 0; i < thumb->n_frames && thumb->frames[i].buf; i++)
- avfilter_unref_bufferp(&thumb->frames[i].buf);
+ av_frame_unref(thumb->frames[i].buf);
av_freep(&thumb->frames);
}
return 0;
}
-static int poll_frame(AVFilterLink *link)
-{
- ThumbContext *thumb = link->src->priv;
- AVFilterLink *inlink = link->src->inputs[0];
- int ret, available_frames = ff_poll_frame(inlink);
-
- /* If the input link is not able to provide any frame, we can't do anything
- * at the moment and thus have zero thumbnail available. */
- if (!available_frames)
- return 0;
-
- /* Since at least one frame is available and the next frame will allow us
- * to compute a thumbnail, we can return 1 frame. */
- if (thumb->n == thumb->n_frames - 1)
- return 1;
-
- /* we have some frame(s) available in the input link, but not yet enough to
- * output a thumbnail, so we request more */
- ret = ff_request_frame(inlink);
- return ret < 0 ? ret : 0;
-}
-
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
- .min_perms = AV_PERM_PRESERVE,
.filter_frame = filter_frame,
},
{ NULL }
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
- .poll_frame = poll_frame,
},
{ NULL }
};