Add MPEG 2 codec
This patch introduces the support of MPEG2 video decoding. It basically just copies data from VA's frame/slice headers data structures to v4l's MPEG2 frame header extended controls data structures.
This commit is contained in:
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 "mpeg2.h"
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#include <assert.h>
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#include <string.h>
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#include <sys/mman.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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* This file takes care of filling v4l2's frame API MPEG2 headers extended
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* controls from VA's data structures.
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*/
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VAStatus sunxi_cedrus_render_mpeg2_slice_data(VADriverContextP ctx,
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object_context_p obj_context, object_surface_p obj_surface,
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object_buffer_p obj_buffer)
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{
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INIT_DRIVER_DATA
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VAStatus vaStatus = VA_STATUS_SUCCESS;
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struct v4l2_buffer buf;
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struct v4l2_plane plane[1];
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/* Query */
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memset(&(buf), 0, sizeof(buf));
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buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
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buf.memory = V4L2_MEMORY_MMAP;
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buf.index = obj_surface->input_buf_index;
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buf.length = 1;
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buf.m.planes = plane;
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assert(ioctl(driver_data->mem2mem_fd, VIDIOC_QUERYBUF, &buf)==0);
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/* Populate frame */
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char *src_buf = mmap(NULL, obj_buffer->size,
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PROT_READ | PROT_WRITE, MAP_SHARED,
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driver_data->mem2mem_fd, buf.m.planes[0].m.mem_offset);
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assert(src_buf != MAP_FAILED);
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memcpy(src_buf, obj_buffer->buffer_data, obj_buffer->size);
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obj_context->mpeg2_frame_hdr.slice_pos = 0;
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obj_context->mpeg2_frame_hdr.slice_len = obj_buffer->size*8;
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return vaStatus;
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}
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VAStatus sunxi_cedrus_render_mpeg2_picture_parameter(VADriverContextP ctx,
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object_context_p obj_context, object_surface_p obj_surface,
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object_buffer_p obj_buffer)
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{
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INIT_DRIVER_DATA
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VAStatus vaStatus = VA_STATUS_SUCCESS;
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VAPictureParameterBufferMPEG2 *pic_param = (VAPictureParameterBufferMPEG2 *)obj_buffer->buffer_data;
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obj_context->mpeg2_frame_hdr.type = MPEG2;
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obj_context->mpeg2_frame_hdr.width = pic_param->horizontal_size;
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obj_context->mpeg2_frame_hdr.height = pic_param->vertical_size;
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obj_context->mpeg2_frame_hdr.picture_coding_type = pic_param->picture_coding_type;
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obj_context->mpeg2_frame_hdr.f_code[0][0] = (pic_param->f_code >> 12) & 0xf;
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obj_context->mpeg2_frame_hdr.f_code[0][1] = (pic_param->f_code >> 8) & 0xf;
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obj_context->mpeg2_frame_hdr.f_code[1][0] = (pic_param->f_code >> 4) & 0xf;
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obj_context->mpeg2_frame_hdr.f_code[1][1] = pic_param->f_code & 0xf;
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obj_context->mpeg2_frame_hdr.intra_dc_precision = pic_param->picture_coding_extension.bits.intra_dc_precision;
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obj_context->mpeg2_frame_hdr.picture_structure = pic_param->picture_coding_extension.bits.picture_structure;
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obj_context->mpeg2_frame_hdr.top_field_first = pic_param->picture_coding_extension.bits.top_field_first;
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obj_context->mpeg2_frame_hdr.frame_pred_frame_dct = pic_param->picture_coding_extension.bits.frame_pred_frame_dct;
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obj_context->mpeg2_frame_hdr.concealment_motion_vectors = pic_param->picture_coding_extension.bits.concealment_motion_vectors;
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obj_context->mpeg2_frame_hdr.q_scale_type = pic_param->picture_coding_extension.bits.q_scale_type;
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obj_context->mpeg2_frame_hdr.intra_vlc_format = pic_param->picture_coding_extension.bits.intra_vlc_format;
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obj_context->mpeg2_frame_hdr.alternate_scan = pic_param->picture_coding_extension.bits.alternate_scan;
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object_surface_p fwd_surface = SURFACE(pic_param->forward_reference_picture);
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if(fwd_surface)
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obj_context->mpeg2_frame_hdr.forward_index = fwd_surface->output_buf_index;
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else
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obj_context->mpeg2_frame_hdr.forward_index = obj_surface->output_buf_index;
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object_surface_p bwd_surface = SURFACE(pic_param->backward_reference_picture);
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if(bwd_surface)
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obj_context->mpeg2_frame_hdr.backward_index = bwd_surface->output_buf_index;
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else
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obj_context->mpeg2_frame_hdr.backward_index = obj_surface->output_buf_index;
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return vaStatus;
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}
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