LXR linux/drivers/media/platform/mtk-vcodec/vdec_drv

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (c) 2016 MediaTek Inc.
   4 * Author: PC Chen <pc.chen@mediatek.com>
   5 *                 Tiffany Lin <tiffany.lin@mediatek.com>
   6 */
   7
   8#ifndef _VDEC_DRV_IF_H_
   9#define _VDEC_DRV_IF_H_
  10
  11#include "mtk_vcodec_drv.h"
  12#include "mtk_vcodec_dec.h"
  13#include "mtk_vcodec_util.h"
  14
  15
  16/**
  17 * struct vdec_fb_status  - decoder frame buffer status
  18 * @FB_ST_NORMAL        : initial state
  19 * @FB_ST_DISPLAY       : frmae buffer is ready to be displayed
  20 * @FB_ST_FREE          : frame buffer is not used by decoder any more
  21 */
  22enum vdec_fb_status {
  23        FB_ST_NORMAL            = 0,
  24        FB_ST_DISPLAY           = (1 << 0),
  25        FB_ST_FREE              = (1 << 1)
  26};
  27
  28/* For GET_PARAM_DISP_FRAME_BUFFER and GET_PARAM_FREE_FRAME_BUFFER,
  29 * the caller does not own the returned buffer. The buffer will not be
  30 *                              released before vdec_if_deinit.
  31 * GET_PARAM_DISP_FRAME_BUFFER  : get next displayable frame buffer,
  32 *                              struct vdec_fb**
  33 * GET_PARAM_FREE_FRAME_BUFFER  : get non-referenced framebuffer, vdec_fb**
  34 * GET_PARAM_PIC_INFO           : get picture info, struct vdec_pic_info*
  35 * GET_PARAM_CROP_INFO          : get crop info, struct v4l2_crop*
  36 * GET_PARAM_DPB_SIZE           : get dpb size, unsigned int*
  37 */
  38enum vdec_get_param_type {
  39        GET_PARAM_DISP_FRAME_BUFFER,
  40        GET_PARAM_FREE_FRAME_BUFFER,
  41        GET_PARAM_PIC_INFO,
  42        GET_PARAM_CROP_INFO,
  43        GET_PARAM_DPB_SIZE
  44};
  45
  46/**
  47 * struct vdec_fb_node  - decoder frame buffer node
  48 * @list        : list to hold this node
  49 * @fb  : point to frame buffer (vdec_fb), fb could point to frame buffer and
  50 *      working buffer this is for maintain buffers in different state
  51 */
  52struct vdec_fb_node {
  53        struct list_head list;
  54        struct vdec_fb *fb;
  55};
  56
  57extern const struct vdec_common_if vdec_h264_if;
  58extern const struct vdec_common_if vdec_vp8_if;
  59extern const struct vdec_common_if vdec_vp9_if;
  60
  61/**
  62 * vdec_if_init() - initialize decode driver
  63 * @ctx : [in] v4l2 context
  64 * @fourcc      : [in] video format fourcc, V4L2_PIX_FMT_H264/VP8/VP9..
  65 */
  66int vdec_if_init(struct mtk_vcodec_ctx *ctx, unsigned int fourcc);
  67
  68/**
  69 * vdec_if_deinit() - deinitialize decode driver
  70 * @ctx : [in] v4l2 context
  71 *
  72 */
  73void vdec_if_deinit(struct mtk_vcodec_ctx *ctx);
  74
  75/**
  76 * vdec_if_decode() - trigger decode
  77 * @ctx : [in] v4l2 context
  78 * @bs  : [in] input bitstream
  79 * @fb  : [in] frame buffer to store decoded frame, when null means parse
  80 *      header only
  81 * @res_chg     : [out] resolution change happens if current bs have different
  82 *      picture width/height
  83 * Note: To flush the decoder when reaching EOF, set input bitstream as NULL.
  84 *
  85 * Return: 0 on success. -EIO on unrecoverable error.
  86 */
  87int vdec_if_decode(struct mtk_vcodec_ctx *ctx, struct mtk_vcodec_mem *bs,
  88                   struct vdec_fb *fb, bool *res_chg);
  89
  90/**
  91 * vdec_if_get_param() - get driver's parameter
  92 * @ctx : [in] v4l2 context
  93 * @type        : [in] input parameter type
  94 * @out : [out] buffer to store query result
  95 */
  96int vdec_if_get_param(struct mtk_vcodec_ctx *ctx, enum vdec_get_param_type type,
  97                      void *out);
  98
  99#endif
 100