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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include "video/vdpau.h"
#include "video/vdpau_mixer.h"
#include "vf.h"
// This filter will read back decoded frames that have been decoded by vdpau
// so they can be post-processed by regular filters. As vdpau is still doing
// the decoding, a vdpau compatible vo must always be used.
//
// NB: This filter assumes the video surface will have a 420 chroma type and
// can always be read back in NV12 format. This is a safe assumption at the
// time of writing, but may not always remain true.
struct vf_priv_s {
struct mp_vdpau_ctx *ctx;
};
static int filter_ext(struct vf_instance *vf, struct mp_image *mpi)
{
struct vf_priv_s *p = vf->priv;
if (!mpi) {
return 0;
}
// Pass-through anything that's not been decoded by VDPAU
if (mpi->imgfmt != IMGFMT_VDPAU) {
vf_add_output_frame(vf, mpi);
return 0;
}
if (mp_vdpau_mixed_frame_get(mpi)) {
MP_ERR(vf, "Can't apply vdpaurb filter after vdpaupp filter.\n");
mp_image_unrefp(&mpi);
return -1;
}
struct mp_hwdec_ctx *hwctx = &p->ctx->hwctx;
struct mp_image *out = hwctx->download_image(hwctx, mpi, vf->out_pool);
if (!out || out->imgfmt != IMGFMT_NV12) {
mp_image_unrefp(&mpi);
mp_image_unrefp(&out);
return -1;
}
vf_add_output_frame(vf, out);
mp_image_unrefp(&mpi);
return 0;
}
static int reconfig(struct vf_instance *vf, struct mp_image_params *in,
struct mp_image_params *out)
{
*out = *in;
if (in->imgfmt == IMGFMT_VDPAU) {
out->imgfmt = IMGFMT_NV12;
out->hw_subfmt = 0;
}
return 0;
}
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
return vf_next_query_format(vf, fmt == IMGFMT_VDPAU ? IMGFMT_NV12 : fmt);
}
static int vf_open(vf_instance_t *vf)
{
struct vf_priv_s *p = vf->priv;
vf->filter_ext = filter_ext;
vf->filter = NULL;
vf->reconfig = reconfig;
vf->query_format = query_format;
p->ctx = hwdec_devices_load(vf->hwdec_devs, HWDEC_VDPAU);
if (!p->ctx)
return 0;
return 1;
}
const vf_info_t vf_info_vdpaurb = {
.description = "vdpau readback",
.name = "vdpaurb",
.open = vf_open,
.priv_size = sizeof(struct vf_priv_s),
};
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