static gboolean default_map (GstVideoMeta * meta, guint plane, GstMapInfo * info, gpointer * data, gint * stride, GstMapFlags flags) { guint idx, length; gsize offset, skip; GstBuffer *buffer = meta->buffer; offset = meta->offset[plane]; /* find the memory block for this plane, this is the memory block containing * the plane offset. FIXME use plane size */ if (!gst_buffer_find_memory (buffer, offset, 1, &idx, &length, &skip)) goto no_memory; if (!gst_buffer_map_range (buffer, idx, length, info, flags)) goto cannot_map; *stride = meta->stride[plane]; *data = (guint8 *) info->data + skip; return TRUE; /* ERRORS */ no_memory: { GST_DEBUG ("plane %u, no memory at offset %" G_GSIZE_FORMAT, plane, offset); return FALSE; } cannot_map: { GST_DEBUG ("cannot map memory range %u-%u", idx, length); return FALSE; } }
static gboolean gst_kms_sink_import_dmabuf (GstKMSSink * self, GstBuffer * inbuf, GstBuffer ** outbuf) { gint prime_fds[GST_VIDEO_MAX_PLANES] = { 0, }; GstVideoMeta *meta; guint i, n_mem, n_planes; GstKMSMemory *kmsmem; guint mems_idx[GST_VIDEO_MAX_PLANES]; gsize mems_skip[GST_VIDEO_MAX_PLANES]; GstMemory *mems[GST_VIDEO_MAX_PLANES]; if (!self->has_prime_import) return FALSE; /* This will eliminate most non-dmabuf out there */ if (!gst_is_dmabuf_memory (gst_buffer_peek_memory (inbuf, 0))) return FALSE; n_planes = GST_VIDEO_INFO_N_PLANES (&self->vinfo); n_mem = gst_buffer_n_memory (inbuf); meta = gst_buffer_get_video_meta (inbuf); GST_TRACE_OBJECT (self, "Found a dmabuf with %u planes and %u memories", n_planes, n_mem); /* We cannot have multiple dmabuf per plane */ if (n_mem > n_planes) return FALSE; /* Update video info based on video meta */ if (meta) { GST_VIDEO_INFO_WIDTH (&self->vinfo) = meta->width; GST_VIDEO_INFO_HEIGHT (&self->vinfo) = meta->height; for (i = 0; i < meta->n_planes; i++) { GST_VIDEO_INFO_PLANE_OFFSET (&self->vinfo, i) = meta->offset[i]; GST_VIDEO_INFO_PLANE_STRIDE (&self->vinfo, i) = meta->stride[i]; } } /* Find and validate all memories */ for (i = 0; i < n_planes; i++) { guint length; if (!gst_buffer_find_memory (inbuf, GST_VIDEO_INFO_PLANE_OFFSET (&self->vinfo, i), 1, &mems_idx[i], &length, &mems_skip[i])) return FALSE; mems[i] = gst_buffer_peek_memory (inbuf, mems_idx[i]); /* And all memory found must be dmabuf */ if (!gst_is_dmabuf_memory (mems[i])) return FALSE; } kmsmem = (GstKMSMemory *) get_cached_kmsmem (mems[0]); if (kmsmem) { GST_LOG_OBJECT (self, "found KMS mem %p in DMABuf mem %p with fb id = %d", kmsmem, mems[0], kmsmem->fb_id); goto wrap_mem; } for (i = 0; i < n_planes; i++) prime_fds[i] = gst_dmabuf_memory_get_fd (mems[i]); GST_LOG_OBJECT (self, "found these prime ids: %d, %d, %d, %d", prime_fds[0], prime_fds[1], prime_fds[2], prime_fds[3]); kmsmem = gst_kms_allocator_dmabuf_import (self->allocator, prime_fds, n_planes, mems_skip, &self->vinfo); if (!kmsmem) return FALSE; GST_LOG_OBJECT (self, "setting KMS mem %p to DMABuf mem %p with fb id = %d", kmsmem, mems[0], kmsmem->fb_id); set_cached_kmsmem (mems[0], GST_MEMORY_CAST (kmsmem)); wrap_mem: *outbuf = gst_buffer_new (); if (!*outbuf) return FALSE; gst_buffer_append_memory (*outbuf, gst_memory_ref (GST_MEMORY_CAST (kmsmem))); gst_buffer_add_parent_buffer_meta (*outbuf, inbuf); return TRUE; }