mirror of
https://github.com/openharmony/drivers_peripheral.git
synced 2026-08-24 07:45:51 -04:00
yanghaizhou
84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/*
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @addtogroup format
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* @{
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*
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* @brief Defines format-related APIs.
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*
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* For example, you use this module to define custom data types and to initialize, create,
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* destroy the muxer and demuxer, and set their parameters. Also, you can read demuxer data frames,
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* select demuxer tracks, add muxer tracks, and write data frames into a container.
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*
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* @since 1.0
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* @version 1.0
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*/
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/**
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* @file parameter_item.h
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*
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* @brief Defines format-related structures and enumerations used to configure and obtain dynamic parameters.
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*
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*
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*
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* @since 1.0
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* @version 1.0
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*/
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#ifndef PARAMETER_ITEM_H
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#define PARAMETER_ITEM_H
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/**
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* @brief Enumerates key types used for setting and obtaining parameters.
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*
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* @since 1.0
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* @version 1.0
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*/
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typedef enum {
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KEY_TYPE_MIME = 0x6d696d65, /**< MIME type. The value type is <b>cstring</b>. */
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KEY_TYPE_HTTP_HEADERS = 0x68706864, /**< HTTP header. The value type is <b>cstring</b>. */
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KEY_TYPE_LANGUAGE = 0x6c616e67, /**< Track language, which is usually the language of audio and subtitles.
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* The value type is <b>cstring</b>.
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*/
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KEY_TYPE_PRE_CACHE = 0x70726361, /**< Precapture cache size. The value type is <b>int</b> */
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KEY_TYPE_SET_SYNC_BUFFER_MSEC = 0x73796e62, /**< Set sync buffer size, uint ms. The value type is <b>int</b> */
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KEY_TYPE_EXTRADATA = 0x65787472, /**< Extra data. The value type is <b>pointer</b> */
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KEY_TYPE_THUMBNAIL = 0x74686e6c /**< Thumbnail. The value type is <b>pointer<b>. */
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} KeyType;
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/**
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* @brief Defines a structure for configuring and obtaining dynamic parameters.
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*/
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typedef struct {
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uint32_t key; /**< Key type. For details, see {@link KeyType} */
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int32_t size; /**< Data size, which indicates the size of the buffer memory pointed by <b>pValue</b> */
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/**
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* @brief Defines value types of the parameters.
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*/
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union {
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int32_t s32Value; /**< 32-bit integer */
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uint32_t u32Value; /**< 32-bit unsigned integer */
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int64_t s64Value; /**< 64-bit integer */
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uint64_t u64Value; /**< 64-bit unsigned integer */
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float fValue; /**< Single-precision floating point number */
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double dValue; /**< Double-precision floating point number */
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const void *pValue; /**< Pointer */
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} value;
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} ParameterItem;
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#endif // PARAMETER_ITEM_H
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/** @} */
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