/* * 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 . */ #include #include #include #include #include #include #include #include #include "config.h" #include "libmpv/render_gl.h" #include "options/m_config.h" #include "video/fmt-conversion.h" #include "video/out/drm_common.h" #include "video/out/gpu/hwdec.h" #include "video/out/hwdec/dmabuf_interop.h" extern const struct m_sub_options drm_conf; struct priv_owner { struct mp_hwdec_ctx hwctx; int *formats; struct dmabuf_interop dmabuf_interop; }; static void uninit(struct ra_hwdec *hw) { struct priv_owner *p = hw->priv; if (p->hwctx.driver_name) hwdec_devices_remove(hw->devs, &p->hwctx); av_buffer_unref(&p->hwctx.av_device_ref); } const static dmabuf_interop_init interop_inits[] = { #if HAVE_DMABUF_INTEROP_GL dmabuf_interop_gl_init, #endif #if HAVE_VAAPI dmabuf_interop_pl_init, #endif #if HAVE_DMABUF_WAYLAND dmabuf_interop_wl_init, #endif NULL }; static int init(struct ra_hwdec *hw) { struct priv_owner *p = hw->priv; for (int i = 0; interop_inits[i]; i++) { if (interop_inits[i](hw, &p->dmabuf_interop)) { break; } } if (!p->dmabuf_interop.interop_map || !p->dmabuf_interop.interop_unmap) { MP_VERBOSE(hw, "drmprime hwdec requires at least one dmabuf interop backend.\n"); return -1; } /* * The drm_params resource is not provided when using X11 or Wayland, but * there are extensions that supposedly provide this information from the * drivers. Not properly documented. Of course. */ mpv_opengl_drm_params_v2 *params = ra_get_native_resource(hw->ra_ctx->ra, "drm_params_v2"); /* * Respect drm_device option, so there is a way to control this when not * using a DRM gpu context. If drm_params_v2 are present, they will already * respect this option. */ void *tmp = talloc_new(NULL); struct drm_opts *drm_opts = mp_get_config_group(tmp, hw->global, &drm_conf); const char *opt_path = drm_opts->device_path; const char *device_path = params && params->render_fd > -1 ? drmGetRenderDeviceNameFromFd(params->render_fd) : opt_path ? opt_path : "/dev/dri/renderD128"; MP_VERBOSE(hw, "Using DRM device: %s\n", device_path); int ret = av_hwdevice_ctx_create(&p->hwctx.av_device_ref, AV_HWDEVICE_TYPE_DRM, device_path, NULL, 0); talloc_free(tmp); if (ret != 0) { MP_VERBOSE(hw, "Failed to create hwdevice_ctx: %s\n", av_err2str(ret)); return -1; } /* * At the moment, there is no way to discover compatible formats * from the hwdevice_ctx, and in fact the ffmpeg hwaccels hard-code * formats too, so we're not missing out on anything. */ int num_formats = 0; MP_TARRAY_APPEND(p, p->formats, num_formats, IMGFMT_NV12); MP_TARRAY_APPEND(p, p->formats, num_formats, IMGFMT_420P); MP_TARRAY_APPEND(p, p->formats, num_formats, pixfmt2imgfmt(AV_PIX_FMT_NV16)); MP_TARRAY_APPEND(p, p->formats, num_formats, 0); // terminate it p->hwctx.hw_imgfmt = IMGFMT_DRMPRIME; p->hwctx.supported_formats = p->formats; p->hwctx.driver_name = hw->driver->name; hwdec_devices_add(hw->devs, &p->hwctx); return 0; } static void mapper_unmap(struct ra_hwdec_mapper *mapper) { struct priv_owner *p_owner = mapper->owner->priv; struct dmabuf_interop_priv *p = mapper->priv; p_owner->dmabuf_interop.interop_unmap(mapper); if (p->surface_acquired) { for (int n = 0; n < p->desc.nb_objects; n++) { if (p->desc.objects[n].fd > -1) close(p->desc.objects[n].fd); } p->surface_acquired = false; } } static void mapper_uninit(struct ra_hwdec_mapper *mapper) { struct priv_owner *p_owner = mapper->owner->priv; if (p_owner->dmabuf_interop.interop_uninit) { p_owner->dmabuf_interop.interop_uninit(mapper); } } static bool check_fmt(struct ra_hwdec_mapper *mapper, int fmt) { struct priv_owner *p_owner = mapper->owner->priv; for (int n = 0; p_owner->formats && p_owner->formats[n]; n++) { if (p_owner->formats[n] == fmt) return true; } return false; } static int mapper_init(struct ra_hwdec_mapper *mapper) { struct priv_owner *p_owner = mapper->owner->priv; struct dmabuf_interop_priv *p = mapper->priv; mapper->dst_params = mapper->src_params; /* * rpi4_8 and rpi4_10 function identically to NV12. These two pixel * formats however are not defined in upstream ffmpeg so a string * comparison is used to identify them instead of a mpv IMGFMT. */ const char* fmt_name = mp_imgfmt_to_name(mapper->src_params.hw_subfmt); if (strcmp(fmt_name, "rpi4_8") == 0 || strcmp(fmt_name, "rpi4_10") == 0) mapper->dst_params.imgfmt = IMGFMT_NV12; else mapper->dst_params.imgfmt = mapper->src_params.hw_subfmt; mapper->dst_params.hw_subfmt = 0; struct ra_imgfmt_desc desc = {0}; if (mapper->ra->num_formats && !ra_get_imgfmt_desc(mapper->ra, mapper->dst_params.imgfmt, &desc)) return -1; p->num_planes = desc.num_planes; mp_image_set_params(&p->layout, &mapper->dst_params); if (p_owner->dmabuf_interop.interop_init) if (!p_owner->dmabuf_interop.interop_init(mapper, &desc)) return -1; if (!check_fmt(mapper, mapper->dst_params.imgfmt)) { MP_FATAL(mapper, "unsupported DRM image format %s\n", mp_imgfmt_to_name(mapper->dst_params.imgfmt)); return -1; } return 0; } static int mapper_map(struct ra_hwdec_mapper *mapper) { struct priv_owner *p_owner = mapper->owner->priv; struct dmabuf_interop_priv *p = mapper->priv; /* * Although we use the same AVDRMFrameDescriptor to hold the dmabuf * properties, we additionally need to dup the fds to ensure the * frame doesn't disappear out from under us. And then for clarity, * we copy all the individual fields. */ const AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)mapper->src->planes[0]; p->desc.nb_layers = desc->nb_layers; p->desc.nb_objects = desc->nb_objects; for (int i = 0; i < desc->nb_layers; i++) { p->desc.layers[i].format = desc->layers[i].format; p->desc.layers[i].nb_planes = desc->layers[i].nb_planes; for (int j = 0; j < desc->layers[i].nb_planes; j++) { p->desc.layers[i].planes[j].object_index = desc->layers[i].planes[j].object_index; p->desc.layers[i].planes[j].offset = desc->layers[i].planes[j].offset; p->desc.layers[i].planes[j].pitch = desc->layers[i].planes[j].pitch; } } for (int i = 0; i < desc->nb_objects; i++) { p->desc.objects[i].format_modifier = desc->objects[i].format_modifier; p->desc.objects[i].size = desc->objects[i].size; // Initialise fds to -1 to make partial failure cleanup easier. p->desc.objects[i].fd = -1; } // Surface is now safe to treat as acquired to allow for unmapping to run. p->surface_acquired = true; // Now actually dup the fds for (int i = 0; i < desc->nb_objects; i++) { p->desc.objects[i].fd = fcntl(desc->objects[i].fd, F_DUPFD_CLOEXEC, 0); if (p->desc.objects[i].fd == -1) { MP_ERR(mapper, "Failed to duplicate dmabuf fd: %s\n", mp_strerror(errno)); goto err; } } // We can handle composed formats if the total number of planes is still // equal the number of planes we expect. Complex formats with auxiliary // planes cannot be supported. int num_returned_planes = 0; for (int i = 0; i < p->desc.nb_layers; i++) { num_returned_planes += p->desc.layers[i].nb_planes; } if (p->num_planes != 0 && p->num_planes != num_returned_planes) { MP_ERR(mapper, "Mapped surface with format '%s' has unexpected number of planes. " "(%d layers and %d planes, but expected %d planes)\n", mp_imgfmt_to_name(mapper->src->params.hw_subfmt), p->desc.nb_layers, num_returned_planes, p->num_planes); goto err; } if (!p_owner->dmabuf_interop.interop_map(mapper, &p_owner->dmabuf_interop, false)) goto err; return 0; err: mapper_unmap(mapper); MP_FATAL(mapper, "mapping DRM dmabuf failed\n"); return -1; } const struct ra_hwdec_driver ra_hwdec_drmprime = { .name = "drmprime", .priv_size = sizeof(struct priv_owner), .imgfmts = {IMGFMT_DRMPRIME, 0}, .init = init, .uninit = uninit, .mapper = &(const struct ra_hwdec_mapper_driver){ .priv_size = sizeof(struct dmabuf_interop_priv), .init = mapper_init, .uninit = mapper_uninit, .map = mapper_map, .unmap = mapper_unmap, }, };