parse_m4a_atom_containers.c 文件参考

解析m4a格式头信息以获取aac解码需要的信息 更多...

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "parse_m4a_atom_containers_port.h"
#include "parse_m4a_atom_containers.h"
#include "romlib_runtime.h"
#include "ci_log.h"
#include "ci130x_system.h"

宏定义
#define	USE_M4A_ATOM_PARSE_VERBOSE   0
#define	BE16TOH(x)   (uint16_t)be16toh(*((uint16_t *)(x)))
#define	BE32TOH(x)   (uint32_t)be32toh(*((uint32_t *)(x)))
#define	ATOM_ITEMS   (sizeof(atomHasChild) / sizeof(atomHasChild[0]))
#define	CMARK   0xA9
#define	TAG_MAX_CNT   100

函数
static uint16_t	be16toh (uint16_t value)
static uint32_t	be32toh (uint32_t value)
static uint32_t	getAtomSize (void *atom)
	转换字节序返回atom size 更多...
int	collectMediaData (mem_file_t *fp, m4a_file_info_t *m4a_file_info, uint32_t parentAtomSize, uint32_t child)
	解析m4a容器 更多...
int32_t	alloc_m4a_info (m4a_file_info_t *m4a_file_info)
	申请m4a容器解码器 更多...
int32_t	free_m4a_info (m4a_file_info_t *m4a_file_info)
	销毁m4a容器解码器 更多...

变量
static uint8_t	atomHasChild []
static const uint8_t	atomTypeString [(sizeof(atomHasChild)/sizeof(atomHasChild[0]))][5]
static uint8_t	atombuf [512]

详细描述

解析m4a格式头信息以获取aac解码需要的信息

版本

1.0

日期

2019-07-18

版权所有

Copyright (c) 2019 Chipintelli Technology Co., Ltd.

宏定义说明

ATOM_ITEMS

#define ATOM_ITEMS   (sizeof(atomHasChild) / sizeof(atomHasChild[0]))

BE16TOH

#define BE16TOH

(

x

)

(uint16_t)be16toh(*((uint16_t *)(x)))

BE32TOH

#define BE32TOH

(

x

)

(uint32_t)be32toh(*((uint32_t *)(x)))

CMARK

#define CMARK   0xA9

TAG_MAX_CNT

#define TAG_MAX_CNT   100

USE_M4A_ATOM_PARSE_VERBOSE

#define USE_M4A_ATOM_PARSE_VERBOSE   0

函数说明

alloc_m4a_info()

int32_t alloc_m4a_info

(

m4a_file_info_t *

m4a_file_info

)

申请m4a容器解码器

参数

m4a_file_info

m4a容器解码器

返回值

RETURN_OK	申请成功
RETURN_ERR	申请失败

be16toh()

static uint16_t be16toh ( uint16_t  value )

static

be32toh()

static uint32_t be32toh ( uint32_t  value )

static

collectMediaData()

int collectMediaData	(	mem_file_t *	fp,
		m4a_file_info_t *	m4a_file_info,
		uint32_t	parentAtomSize,
		uint32_t	child
	)

解析m4a容器

参数

fp	数据读取描述符
m4a_file_info	m4a容器解码器
parentAtomSize	文件大小
child	atom节点

返回值

RETURN_OK	播放启动成功
RETURN_ERR	播放启动失败

free_m4a_info()

int32_t free_m4a_info

(

m4a_file_info_t *

m4a_file_info

)

销毁m4a容器解码器

参数

m4a_file_info

m4a容器解码器

返回值

RETURN_OK	销毁成功
RETURN_ERR	销毁失败

getAtomSize()

static uint32_t getAtomSize ( void *  atom )

inlinestatic

转换字节序返回atom size

参数

atom

buff地址

返回

uint32_t atom值

变量说明

atombuf

uint8_t atombuf[512]

static

atomHasChild

uint8_t atomHasChild[]

static

初始值:

= 
{
    0, 0, 0, 1, 0, 1,
    0, 1, 0, 0, 0, 1,
    0, 1, 0 ,0, 1, 0,
    0, 1, 0, 1, 0, 0,
    0, 0, 0, 1, 0, 0,
    1, 0, 0, 1, 0, 0,
    1, 1, 1, 1, 1, 1,
    0,
    
    0, 0,
    0, 0,
    0, 0,
    0,

    0
}

atomTypeString

const uint8_t atomTypeString[(sizeof(atomHasChild)/sizeof(atomHasChild[0]))][5]

static

初始值:

=
{
    "ftyp",  "wide",  "mdat",  "moov",  "mvhd",  "trak", 
    "tkhd",  "tapt",  "clef",  "prof",  "enof",  "edts", 
    "elst",  "mdia",  "mdhd",  "hdlr",  "minf",  "vmhd", 
    "smhd",  "dinf",  "dref",  "stbl",  "stsd",  "stts", 
    "stsc",  "stsz",  "stco",  "udta",  "free",  "skip", 
    "meta",  "load",  "iods",  "ilst",  "keys",  "data", 
    "trkn",  "disk",  "cpil",  "pgap",  "tmpo",  "gnre", 
    "covr", 

    { 0xA9 , 'n', 'a', 'm', '\0'},  { 0xA9 , 'A', 'R', 'T', '\0'}, 
    { 0xA9 , 'a', 'l', 'b', '\0'},  { 0xA9 , 'g', 'e', 'n', '\0'}, 
    { 0xA9 , 'd', 'a', 'y', '\0'},  { 0xA9 , 't', 'o', 'o', '\0'}, 
    { 0xA9 , 'w', 'r', 't', '\0'}, 

    "----", 
}