static int hwdownload_query_formats(AVFilterContext *avctx) { AVFilterFormats *infmts = NULL; AVFilterFormats *outfmts = NULL; const AVPixFmtDescriptor *desc; int err; for (desc = av_pix_fmt_desc_next(NULL); desc; desc = av_pix_fmt_desc_next(desc)) { if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) err = ff_add_format(&infmts, av_pix_fmt_desc_get_id(desc)); else err = ff_add_format(&outfmts, av_pix_fmt_desc_get_id(desc)); if (err) { ff_formats_unref(&infmts); ff_formats_unref(&outfmts); return err; } } if ((err = ff_formats_ref(infmts, &avctx->inputs[0]->out_formats)) < 0 || (err = ff_formats_ref(outfmts, &avctx->outputs[0]->in_formats)) < 0) return err; return 0; }
static int query_formats(AVFilterContext *ctx) { AVFilterFormats *formats; enum AVPixelFormat pix_fmt; int ret; /** accept any input pixel format that is not hardware accelerated, not * a bitstream format, and does not have vertically sub-sampled chroma */ if (ctx->inputs[0]) { const AVPixFmtDescriptor *desc = NULL; formats = NULL; while ((desc = av_pix_fmt_desc_next(desc))) { pix_fmt = av_pix_fmt_desc_get_id(desc); if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL || desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) && desc->nb_components && !desc->log2_chroma_h && (ret = ff_add_format(&formats, pix_fmt)) < 0) { ff_formats_unref(&formats); return ret; } } ff_formats_ref(formats, &ctx->inputs[0]->out_formats); ff_formats_ref(formats, &ctx->outputs[0]->in_formats); } return 0; }
AVFilterFormats *ff_all_formats(enum AVMediaType type) { AVFilterFormats *ret = NULL; if (type == AVMEDIA_TYPE_VIDEO) { const AVPixFmtDescriptor *desc = NULL; while ((desc = av_pix_fmt_desc_next(desc))) { if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) ff_add_format(&ret, av_pix_fmt_desc_get_id(desc)); } } else if (type == AVMEDIA_TYPE_AUDIO) { enum AVSampleFormat fmt = 0; while (av_get_sample_fmt_name(fmt)) { ff_add_format(&ret, fmt); fmt++; } } return ret; }