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104 lines
3.5 KiB
104 lines
3.5 KiB
3 years ago
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// SPDX-License-Identifier: LGPL-2.1-or-later
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// alpha_d3d11.cpp : helper to combine D3D11 planes to generate pictures with alpha
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// Copyright © 2023 VideoLabs, VLC authors and VideoLAN
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// Authors: Steve Lhomme <robux4@videolabs.io>
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "alpha_combine.h"
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#include "../video_chroma/d3d11_fmt.h"
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struct d3d11_alpha_context
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{
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d3d11_pic_context ctx;
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picture_t *opaque;
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picture_t *alpha;
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};
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static void d3d11_alpha_pic_context_destroy(picture_context_t *ctx)
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{
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d3d11_alpha_context *pic_ctx = container_of(ctx, d3d11_alpha_context, ctx);
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picture_Release(pic_ctx->opaque);
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picture_Release(pic_ctx->alpha);
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auto *picsys_out = &pic_ctx->ctx.picsys;
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// texture objects have been be released by their parents
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picsys_out->renderSrc[0] = nullptr;
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picsys_out->renderSrc[1] = nullptr;
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picsys_out->renderSrc[2] = nullptr;
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picsys_out->renderSrc[3] = nullptr;
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picsys_out->texture[0] = nullptr;
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picsys_out->texture[1] = nullptr;
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picsys_out->texture[2] = nullptr;
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picsys_out->texture[3] = nullptr;
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d3d11_pic_context_destroy(ctx);
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}
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static picture_context_t *d3d11_alpha_pic_context_copy(picture_context_t *)
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{
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assert(!"unsupported yet!");
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return nullptr;
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}
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picture_t *CombineD3D11(decoder_t *dec, picture_t *opaque, picture_t *alpha, vlc_video_context *vctx)
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{
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auto *out = decoder_NewPicture(dec);
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if (out == nullptr)
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return nullptr;
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d3d11_alpha_context *pic_ctx = static_cast<d3d11_alpha_context *>(calloc(1, sizeof(*pic_ctx)));
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if (unlikely(pic_ctx == NULL))
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{
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picture_Release(out);
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return nullptr;
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}
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pic_ctx->ctx.picsys.sharedHandle = INVALID_HANDLE_VALUE;
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pic_ctx->ctx.s.copy = d3d11_alpha_pic_context_copy;
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pic_ctx->ctx.s.destroy = d3d11_alpha_pic_context_destroy;
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pic_ctx->ctx.s.vctx = vlc_video_context_Hold(vctx);
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pic_ctx->opaque = picture_Hold(opaque);
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pic_ctx->alpha = picture_Hold(alpha);
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out->context = &pic_ctx->ctx.s;
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auto *picsys_out = &pic_ctx->ctx.picsys;
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auto *picsys_opaque = ActiveD3D11PictureSys(opaque);
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auto *picsys_alpha = ActiveD3D11PictureSys(alpha);
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picsys_out->renderSrc[0] = picsys_opaque->renderSrc[0]; // opaque Y
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picsys_out->renderSrc[1] = picsys_opaque->renderSrc[1]; // opaque UV
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picsys_out->renderSrc[2] = picsys_alpha->renderSrc[0]; // alpha Y
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picsys_out->renderSrc[3] = picsys_alpha->renderSrc[1]; // alpha UV
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picsys_out->texture[0] = picsys_opaque->texture[0];
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picsys_out->texture[1] = picsys_opaque->texture[1];
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picsys_out->texture[2] = picsys_alpha->texture[0];
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picsys_out->texture[3] = picsys_alpha->texture[1];
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return out;
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}
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int SetupD3D11(decoder_t *dec, vlc_video_context *vctx, vlc_video_context **vctx_out)
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{
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auto *vctx_sys = GetD3D11ContextPrivate(vctx);
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assert(vctx_sys->secondary == DXGI_FORMAT_UNKNOWN);
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assert(*vctx_out == nullptr); // TODO handle multiple format updates
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auto *dec_dev = vlc_video_context_HoldDevice(vctx);
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*vctx_out = D3D11CreateVideoContext(dec_dev, vctx_sys->format, DXGI_FORMAT_NV12);
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vlc_decoder_device_Release(dec_dev);
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if (unlikely(*vctx_out == nullptr))
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{
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msg_Dbg(dec,"Failed to create output vctx.");
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return VLC_EGENERIC;
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}
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dec->fmt_out.video.i_chroma = dec->fmt_out.i_codec = VLC_CODEC_D3D11_OPAQUE_ALPHA;
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return VLC_SUCCESS;
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}
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