return ret;
}
-
-int ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
-{
- AVFilterBufferRef *buf_out = avfilter_ref_buffer(picref, ~0);
- if (!buf_out)
- return AVERROR(ENOMEM);
- return ff_start_frame(link->dst->outputs[0], buf_out);
-}
-
-// for filters that support (but don't require) outpic==inpic
-int ff_inplace_start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
-{
- AVFilterLink *outlink = inlink->dst->outputs[0];
- AVFilterBufferRef *outpicref = NULL, *for_next_filter;
- int ret = 0;
-
- if ((inpicref->perms & AV_PERM_WRITE) && !(inpicref->perms & AV_PERM_PRESERVE)) {
- outpicref = avfilter_ref_buffer(inpicref, ~0);
- if (!outpicref)
- return AVERROR(ENOMEM);
- } else {
- outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
- if (!outpicref)
- return AVERROR(ENOMEM);
-
- avfilter_copy_buffer_ref_props(outpicref, inpicref);
- outpicref->video->w = outlink->w;
- outpicref->video->h = outlink->h;
- }
-
- for_next_filter = avfilter_ref_buffer(outpicref, ~0);
- if (for_next_filter)
- ret = ff_start_frame(outlink, for_next_filter);
- else
- ret = AVERROR(ENOMEM);
-
- if (ret < 0) {
- avfilter_unref_bufferp(&outpicref);
- return ret;
- }
-
- outlink->out_buf = outpicref;
- return 0;
-}
-
-static int default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->nb_outputs)
- outlink = inlink->dst->outputs[0];
-
- if (outlink) {
- AVFilterBufferRef *buf_out;
- outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
- if (!outlink->out_buf)
- return AVERROR(ENOMEM);
-
- avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
- buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
- if (!buf_out)
- return AVERROR(ENOMEM);
-
- return ff_start_frame(outlink, buf_out);
- }
- return 0;
-}
-
-static void clear_link(AVFilterLink *link)
-{
- avfilter_unref_bufferp(&link->cur_buf);
- avfilter_unref_bufferp(&link->src_buf);
- avfilter_unref_bufferp(&link->out_buf);
-}
-
-/* XXX: should we do the duplicating of the picture ref here, instead of
- * forcing the source filter to do it? */
-int ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
-{
- int (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
- AVFilterPad *dst = link->dstpad;
- int ret, perms = picref->perms;
-
- FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
-
- if (!(start_frame = dst->start_frame))
- start_frame = default_start_frame;
-
- if (picref->linesize[0] < 0)
- perms |= AV_PERM_NEG_LINESIZES;
- /* prepare to copy the picture if it has insufficient permissions */
- if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
- av_log(link->dst, AV_LOG_DEBUG,
- "frame copy needed (have perms %x, need %x, reject %x)\n",
- picref->perms,
- link->dstpad->min_perms, link->dstpad->rej_perms);
-
- link->cur_buf = ff_get_video_buffer(link, dst->min_perms, link->w, link->h);
- if (!link->cur_buf) {
- avfilter_unref_bufferp(&picref);
- return AVERROR(ENOMEM);
- }
-
- link->src_buf = picref;
- avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
- }
- else
- link->cur_buf = picref;
-
- ret = start_frame(link, link->cur_buf);
- if (ret < 0)
- clear_link(link);
-
- return ret;
-}
-
-int ff_null_end_frame(AVFilterLink *link)
-{
- return ff_end_frame(link->dst->outputs[0]);
-}
-
-static int default_end_frame(AVFilterLink *inlink)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->nb_outputs)
- outlink = inlink->dst->outputs[0];
-
- if (outlink) {
- return ff_end_frame(outlink);
- }
- return 0;
-}
-
-int ff_end_frame(AVFilterLink *link)
-{
- int (*end_frame)(AVFilterLink *);
- int ret;
-
- if (!(end_frame = link->dstpad->end_frame))
- end_frame = default_end_frame;
-
- ret = end_frame(link);
-
- clear_link(link);
-
- return ret;
-}
-
-int ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
- return ff_draw_slice(link->dst->outputs[0], y, h, slice_dir);
-}
-
-static int default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->nb_outputs)
- outlink = inlink->dst->outputs[0];
-
- if (outlink)
- return ff_draw_slice(outlink, y, h, slice_dir);
- return 0;
-}
-
-int ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
- uint8_t *src[4], *dst[4];
- int i, j, vsub, ret;
- int (*draw_slice)(AVFilterLink *, int, int, int);
-
- FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
-
- /* copy the slice if needed for permission reasons */
- if (link->src_buf) {
- const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
- vsub = desc->log2_chroma_h;
-
- for (i = 0; i < 4; i++) {
- if (link->src_buf->data[i]) {
- src[i] = link->src_buf-> data[i] +
- (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
- dst[i] = link->cur_buf->data[i] +
- (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
- } else
- src[i] = dst[i] = NULL;
- }
-
- for (i = 0; i < 4; i++) {
- int planew =
- av_image_get_linesize(link->format, link->cur_buf->video->w, i);
-
- if (!src[i]) continue;
-
- for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
- memcpy(dst[i], src[i], planew);
- src[i] += link->src_buf->linesize[i];
- dst[i] += link->cur_buf->linesize[i];
- }
- }
- }
-
- if (!(draw_slice = link->dstpad->draw_slice))
- draw_slice = default_draw_slice;
- ret = draw_slice(link, y, h, slice_dir);
- if (ret < 0)
- clear_link(link);
- return ret;
-}
projects / ffmpeg / blobdiff