static int draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { PixdescTestContext *priv = inlink->dst->priv; AVFilterBufferRef *inpic = inlink->cur_buf; AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf; int i, c, w = inlink->w; for (c = 0; c < priv->pix_desc->nb_components; c++) { int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w; int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h; int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y; for (i = y1; i < y1 + h1; i++) { av_read_image_line(priv->line, inpic->data, inpic->linesize, priv->pix_desc, 0, i, c, w1, 0); av_write_image_line(priv->line, outpic->data, outpic->linesize, priv->pix_desc, 0, i, c, w1); } } return ff_draw_slice(inlink->dst->outputs[0], y, h, slice_dir); }
static int filter_frame(AVFilterLink *inlink, AVFrame *in) { PixdescTestContext *priv = inlink->dst->priv; AVFilterLink *outlink = inlink->dst->outputs[0]; AVFrame *out; int i, c, w = inlink->w, h = inlink->h; const int cw = FF_CEIL_RSHIFT(w, priv->pix_desc->log2_chroma_w); const int ch = FF_CEIL_RSHIFT(h, priv->pix_desc->log2_chroma_h); out = ff_get_video_buffer(outlink, outlink->w, outlink->h); if (!out) { av_frame_free(&in); return AVERROR(ENOMEM); } av_frame_copy_props(out, in); for (i = 0; i < 4; i++) { const int h1 = i == 1 || i == 2 ? ch : h; if (out->data[i]) { uint8_t *data = out->data[i] + (out->linesize[i] > 0 ? 0 : out->linesize[i] * (h1-1)); memset(data, 0, FFABS(out->linesize[i]) * h1); } } /* copy palette */ if (priv->pix_desc->flags & AV_PIX_FMT_FLAG_PAL || priv->pix_desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) memcpy(out->data[1], in->data[1], AVPALETTE_SIZE); for (c = 0; c < priv->pix_desc->nb_components; c++) { const int w1 = c == 1 || c == 2 ? cw : w; const int h1 = c == 1 || c == 2 ? ch : h; for (i = 0; i < h1; i++) { av_read_image_line(priv->line, (void*)in->data, in->linesize, priv->pix_desc, 0, i, c, w1, 0); av_write_image_line(priv->line, out->data, out->linesize, priv->pix_desc, 0, i, c, w1); } } av_frame_free(&in); return ff_filter_frame(outlink, out); }