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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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