drivers/media/platform/mtk-vcodec/vdec_drv_if.h

   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  */
  22 enum 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  */
  38 enum 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  */
  52 struct vdec_fb_node {
  53         struct list_head list;
  54         struct vdec_fb *fb;
  55 };
  56
  57 extern const struct vdec_common_if vdec_h264_if;
  58 extern const struct vdec_common_if vdec_vp8_if;
  59 extern 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  */
  66 int 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  */
  73 void 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  */
  87 int 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  */
  96 int vdec_if_get_param(struct mtk_vcodec_ctx *ctx, enum vdec_get_param_type type,
  97                       void *out);
  98
  99 #endif