Adds a sunxi-cedrus-drv-video libVA backend
This VA backend uses v4l2's Frame API proposal to interface with the "sunxi-cedrus" video driver on Allwinner SoC. Only a few parts of the code are really dependent on sunxi-cedrus and this VA backend could be reused for other v4l drivers using the Frame API.
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Florent Revest
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/*
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* Copyright (c) 2016 Florent Revest, <florent.revest@free-electrons.com>
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* 2007 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "sunxi_cedrus_drv_video.h"
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#include "picture.h"
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#include "buffer.h"
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#include "context.h"
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#include "surface.h"
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#include "va_config.h"
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <linux/videodev2.h>
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/*
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* A Picture is an encoded input frame made of several buffers. A single input
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* can contain slice data, headers and IQ matrix. Each Picture is assigned a
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* request ID when created and each corresponding buffer might be turned into a
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* v4l buffers or extended control when rendered. Finally they are submitted to
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* kernel space when reaching EndPicture.
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*/
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VAStatus sunxi_cedrus_BeginPicture(VADriverContextP ctx, VAContextID context,
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VASurfaceID render_target)
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{
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INIT_DRIVER_DATA
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VAStatus vaStatus = VA_STATUS_SUCCESS;
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object_context_p obj_context;
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object_surface_p obj_surface;
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obj_context = CONTEXT(context);
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assert(obj_context);
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obj_surface = SURFACE(render_target);
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assert(obj_surface);
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if(obj_surface->status == VASurfaceRendering)
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sunxi_cedrus_SyncSurface(ctx, render_target);
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obj_surface->status = VASurfaceRendering;
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obj_surface->request = (obj_context->num_rendered_surfaces)%INPUT_BUFFERS_NB+1;
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obj_surface->input_buf_index = obj_context->num_rendered_surfaces%INPUT_BUFFERS_NB;
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obj_context->num_rendered_surfaces ++;
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obj_context->current_render_target = obj_surface->base.id;
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return vaStatus;
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}
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VAStatus sunxi_cedrus_RenderPicture(VADriverContextP ctx, VAContextID context,
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VABufferID *buffers, int num_buffers)
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{
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INIT_DRIVER_DATA
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VAStatus vaStatus = VA_STATUS_SUCCESS;
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object_context_p obj_context;
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object_surface_p obj_surface;
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object_config_p obj_config;
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int i;
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obj_context = CONTEXT(context);
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assert(obj_context);
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obj_config = CONFIG(obj_context->config_id);
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if (NULL == obj_config)
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{
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vaStatus = VA_STATUS_ERROR_INVALID_CONFIG;
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return vaStatus;
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}
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obj_surface = SURFACE(obj_context->current_render_target);
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assert(obj_surface);
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/* verify that we got valid buffer references */
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for(i = 0; i < num_buffers; i++)
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{
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object_buffer_p obj_buffer = BUFFER(buffers[i]);
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assert(obj_buffer);
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if (NULL == obj_buffer)
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{
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vaStatus = VA_STATUS_ERROR_INVALID_BUFFER;
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break;
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}
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}
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return vaStatus;
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}
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VAStatus sunxi_cedrus_EndPicture(VADriverContextP ctx, VAContextID context)
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{
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INIT_DRIVER_DATA
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VAStatus vaStatus = VA_STATUS_SUCCESS;
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object_context_p obj_context;
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object_surface_p obj_surface;
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struct v4l2_buffer out_buf, cap_buf;
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struct v4l2_plane plane[1];
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struct v4l2_plane planes[2];
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struct v4l2_ext_control ctrl;
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struct v4l2_ext_controls extCtrls;
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object_config_p obj_config;
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obj_context = CONTEXT(context);
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assert(obj_context);
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obj_surface = SURFACE(obj_context->current_render_target);
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assert(obj_surface);
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obj_config = CONFIG(obj_context->config_id);
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if (NULL == obj_config)
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{
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vaStatus = VA_STATUS_ERROR_INVALID_CONFIG;
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return vaStatus;
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}
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memset(&(out_buf), 0, sizeof(out_buf));
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out_buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
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out_buf.memory = V4L2_MEMORY_MMAP;
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out_buf.index = obj_surface->input_buf_index;
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out_buf.length = 1;
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out_buf.m.planes = plane;
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out_buf.request = obj_surface->request;
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switch(obj_config->profile) {
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default:
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out_buf.m.planes[0].bytesused = 0;
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ctrl.id = V4L2_CID_MPEG_VIDEO_MPEG2_FRAME_HDR;
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ctrl.ptr = NULL;
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ctrl.size = 0;
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break;
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}
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memset(&(cap_buf), 0, sizeof(cap_buf));
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cap_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
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cap_buf.memory = V4L2_MEMORY_MMAP;
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cap_buf.index = obj_surface->output_buf_index;
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cap_buf.length = 2;
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cap_buf.m.planes = planes;
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assert(ioctl(driver_data->mem2mem_fd, VIDIOC_QUERYBUF, &cap_buf)==0);
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extCtrls.controls = &ctrl;
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extCtrls.count = 1;
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extCtrls.request = obj_surface->request;
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assert(ioctl(driver_data->mem2mem_fd, VIDIOC_S_EXT_CTRLS, &extCtrls)==0);
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if(ioctl(driver_data->mem2mem_fd, VIDIOC_QBUF, &cap_buf)) {
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obj_surface->status = VASurfaceSkipped;
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sunxi_cedrus_msg("Error when queuing output: %s\n", strerror(errno));
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return VA_STATUS_ERROR_UNKNOWN;
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}
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if(ioctl(driver_data->mem2mem_fd, VIDIOC_QBUF, &out_buf)) {
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obj_surface->status = VASurfaceSkipped;
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sunxi_cedrus_msg("Error when queuing input: %s\n", strerror(errno));
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ioctl(driver_data->mem2mem_fd, VIDIOC_DQBUF, &cap_buf);
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return VA_STATUS_ERROR_UNKNOWN;
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}
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/* For now, assume that we are done with rendering right away */
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obj_context->current_render_target = -1;
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return vaStatus;
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}
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