int avfilter_link(AVFilterContext *src, unsigned srcpad,
AVFilterContext *dst, unsigned dstpad)
{
AVFilterLink *link;
av_assert0(src->graph);
av_assert0(dst->graph);
av_assert0(src->graph == dst->graph);
if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
src->outputs[srcpad] || dst->inputs[dstpad])
return AVERROR(EINVAL);
if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
av_log(src, AV_LOG_ERROR,
"Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
return AVERROR(EINVAL);
}
link = av_mallocz(sizeof(*link));
if (!link)
return AVERROR(ENOMEM);
src->outputs[srcpad] = dst->inputs[dstpad] = link;
link->src = src;
link->dst = dst;
link->srcpad = &src->output_pads[srcpad];
link->dstpad = &dst->input_pads[dstpad];
link->type = src->output_pads[srcpad].type;
av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
link->format = -1;
ff_framequeue_init(&link->fifo, &src->graph->internal->frame_queues);
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
CueContext *s = ctx->priv;
ff_framequeue_init(&s->queue, &ctx->graph->internal->frame_queues);
return 0;
}
