音视频 | MP4格式文件开发与学习
时间：2025年2月11日12:23:29
参考资料
MP4文件格式的解析2.mp4文件解析(纯c解析代码) - leaffei - 博客园
3.MP4文件格式详解——元数据moov（一）mvhd box_moov详细解析-优快云博客
1.MP4文件格式的解析
代码
/*******************************************************************
* > File Name: MP4Parser.c
* > Author: Lucky fly
* > Mail: MTM1ODMyNjI3NEBxcS5jb20=
* > Create Time: Tue 11 Feb 2025 12:38:40 PM CST
* > Note: 6YCP5piO5rC05pm2
******************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PRINTF_DEBUG
#define BOX_TYPE_FTYPE "ftyp"
#define BOX_TYPE_MOOV "moov"
#define BOX_TYPE_MVHD "mvhd"
#define BOX_TYPE_TRAK "trak"
#define BOX_TYPE_TKHD "tkhd"
#define BOX_TYPE_EDTS "edts"
#define BOX_TYPE_MDIA "mdia"
#define BOX_TYPE_MDHD "mdhd"
#define BOX_TYPE_HDLR "hdlr"
#define BOX_TYPE_MINF "minf"
#define BOX_TYPE_VMHD "vmhd"
#define BOX_TYPE_DINF "dinf"
#define BOX_TYPE_DREF "dref"
#define BOX_TYPE_STBL "stbl"
#define BOX_TYPE_STSD "stsd"
#define BOX_TYPE_STTS "stts"
#define BOX_TYPE_STSS "stss"
#define BOX_TYPE_STSC "stsc"
#define BOX_TYPE_STSZ "stsz"
#define BOX_TYPE_STCO "stco"
#define BOX_TYPE_UDTA "udta"
#define MAX_BOX_SIZE_LEN 4
#define MAX_BOX_TYPE_LEN 4
#define MAX_HANDLER_TYPE_LEN 4
#define MAX_FTYP_BRABDS_LEN 4
#define MAX_FTYP_BRABDS_NUM 4
#define MAX_STTS_ENTRY_NUM 8
#define MAX_STSS_ENTRY_NUM 8
#define MAX_STSC_ENTRY_NUM 100
#define MAX_STSZ_ENTRY_NUM 100 /* now parse 100 frame */
#define MAX_STCO_ENTRY_NUM 100
#define MAX_MVHD_RESERVED_LEN 10
#define MAX_PRE_DEFINE_LEN 24
#define MAX_MATRIX_LEN 36
#define MAX_HDLR_NAME_LEN 100
typedef struct t_box_header
{
int boxSize;
unsigned char boxType[MAX_BOX_TYPE_LEN+1];
long largeBoxSize; /* if boxSize=1 use, if boxSize=0, end of file */
} T_BOX_HEADER;
/********************************************************************************************
** File Type Box (ftyp): file type, 表明文件类型
**
--------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
--------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** major_brand | 4 |
** minor_version | 4 | 版本号
** compatible_brands | 4 * N | 本文件遵从的多种协议(ismo, iso2, mp41)
********************************************************************************************/
typedef struct t_box4ftyp_brand
{
unsigned char brands[MAX_FTYP_BRABDS_LEN+1];
} T_BOX4FTYP_BRAN;
typedef struct t_box4ftyp
{
unsigned char major_brand[MAX_FTYP_BRABDS_LEN+1];
int minor_version;
T_BOX4FTYP_BRAN compatible_brands[MAX_FTYP_BRABDS_NUM];
} T_BOX4FTYP;
/************************************************************************************************************
** mvhd: movie header, 文件的总体信息: 时长, 创建时间等
**
--------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
--------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** creation time | 4 | 创建时间（相对于UTC时间1904 - 01 - 01零点的秒数）
** modification time | 4 | 修改时间
** time scale | 4 | 文件媒体在1秒时间内的刻度值，可以理解为1秒长度的时间单元数
** duration | 4 | 该track的时间长度，用duration和time scale值可以计算track时长
** rate | 4 | 推荐播放速率，高16位和低16位分别为小数点整数部分和小数部分，即[16.16] 格式.该值为1.0 (0x00010000)
** volume | 2 | 与rate类似，[8.8] 格式，1.0（0x0100）表示最大音量
** reserved | 10 | 保留位
** matrix | 36 | 视频变换矩阵
** pre-defined | 24 |
** next track id | 4 | 下一个track使用的id号
**
if (version==1)
{
unsigned int(64) creation_time;
unsigned int(64) modification_time;
unsigned int(32) timescale;
unsigned int(64) duration;
}
else
{
unsigned int(32) creation_time;
unsigned int(32) modification_time;
unsigned int(32) timescale;
unsigned int(32) duration;
}
************************************************************************************************************/
typedef struct t_box4mvhd
{
int creation_time;
int modification_time;
int timescale;
int duration;
float rate;
float volume;
int next_track_id;
} T_BOX4MVHD;
/************************************************************************************************************
** tkhd: track header, track的总体信息, 如时长, 宽高等
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0。（以下字节数均按version = 0）
** flags | 3 | 按位或操作结果值，预定义如下;
0x000001 track_enabled，否则该track不被播放；
0x000002 track_in_movie，表示该track在播放中被引用；
0x000004 track_in_preview，表示该track在预览时被引用。
一般该值为7，如果一个媒体所有track均未设置track_in_movie和track_in_preview,将被理解为所有track均设置了这两项;
对于hint track，该值为0;
** creation_time | 4 | 创建时间（相对于UTC时间1904 - 01 - 01零点的秒数）
** modification_time | 4 | 修改时间
** track_id | 4 | id号 不能重复且不能为0
** reserved | 4 | 保留位
** duration | 4 | track的时间长度
** reserved | 8 | 保留位
** layer | 2 | 视频层，默认为0，值小的在上层
** alternate_group | 2 | track分组信息，默认为0表示该track未与其他track有群组关系
** volume | 2 | [8.8] 格式，如果为音频track，1.0（0x0100）表示最大音量；否则为0
** reserved | 2 | 保留位
** matrix | 36 | 视频变换矩阵
** width | 4 | 宽
** height | 4 | 高，均为[16.16] 格式值 与sample描述中的实际画面大小比值，用于播放时的展示宽高
if (version==1)
{
unsigned int(64) creation_time;
unsigned int(64) modification_time;
unsigned int(32) track_ID;
const unsigned int(32) reserved = 0;
unsigned int(64) duration;
}
else
{
unsigned int(32) creation_time;
unsigned int(32) modification_time;
unsigned int(32) track_ID;
const unsigned int(32) reserved = 0;
unsigned int(32) duration;
}
************************************************************************************************************/
typedef struct t_box4tkhd
{
int flags;
int creation_time;
int modification_time;
int track_id;
int duration;
int layer;
int alternate_group;
float volume;
float width;
float height;
} T_BOX4TKHD;
/************************************************************************************************************
** mdhd: 包含了了该track的总体信息, mdhd和tkhd 内容大致都是一样的.
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本0或1 一般为0 (以下字节数均按version=0)
** flags | 3 |
** creation_time | 4 | 创建时间（相对于UTC时间1904 - 01 - 01零点的秒数）
** modification_time | 4 | 修改时间
** time_scale | 4 |
** duration | 4 | track的时间长度
** language | 2 | 媒体语言码,最高位为0 后面15位为3个字符[见ISO 639-2/T标准中定义]
** pre-defined | 2 | 保留位
** tkhd通常是对指定的track设定相关属性和内容, 而mdhd是针对于独立的media来设置的, 一般情况下二者相同.
************************************************************************************************************/
typedef struct t_box4mdhd
{
int creation_time;
int modification_time;
int timescale;
int duration;
short language;
} T_BOX4MDHD;
/************************************************************************************************************
** hdlr: Handler Reference Box, 媒体的播放过程信息, 该box也可以被包含在meta box(meta)中
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本0或1 一般为0 (以下字节数均按version=0)
** flags | 3 |
** pre-defined | 4 |
** handler type | 4 | 在media box中，该值为4个字符
"vide"— video track
"soun"— audio track
"hint"— hint track
** reserved | 12 |
** name | 不定 | track type name，以‘\0’结尾的字符串
************************************************************************************************************/
typedef struct t_box4hdlr
{
unsigned char handler_type[MAX_HANDLER_TYPE_LEN+1];
unsigned char name[MAX_HDLR_NAME_LEN+1];
} T_BOX4HDLR;
/************************************************************************************************************
** vmhd: Video Media Header Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本0或1 一般为0 (以下字节数均按version=0)
** flags | 3 |
** graphics_mode | 4 | 视频合成模式，为0时拷贝原始图像，否则与opcolor进行合成
** opcolor | 2 ×3 | ｛red，green，blue｝
"vide"—vmhd 视频
"soun"— smhd 音频
"hint"—hmhd 忽略
************************************************************************************************************/
typedef struct t_box4vmhd
{
int graphics_mode;
} T_BOX4VMHD;
/************************************************************************************************************
** dref: data reference box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本0或1 一般为0 (以下字节数均按version=0)
** flags | 3 |
** entry count | 4 | "url"或"urn"表的元素个数
** "url"或"urn"列表 | 不定 |
** "dref"下会包含若干个"url"或"urn", 这些box组成一个表, 用来定位track数据. 简单的说, track可以被分成若干段,
每一段都可以根据"url"或"urn"指向的地址来获取数据, sample描述中会用这些片段的序号将这些片段组成一个完整的track.
一般情况下, 当数据被完全包含在文件中时, "url"或"urn"中的定位字符串是空的.
************************************************************************************************************/
typedef struct t_box4dref
{
int entry_count;
} T_BOX4DREF;
/************************************************************************************************************
** stsd: Sample Description Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本0或1 一般为0 (以下字节数均按version=0)
** entry count | 4 | "url"或"urn"表的元素个数
** box header和version字段后会有一个entry count字段, 根据entry的个数, 每个entry会有type信息, 如"vide", "sund"等,
根据type不同sample description会提供不同的信息, 例如对于video track, 会有"VisualSampleEntry"类型信息,
对于audio track会有"AudioSampleEntry"类型信息. 视频的编码类型, 宽高, 长度, 音频的声道, 采样等信息都会出现在这个box中
************************************************************************************************************/
typedef struct t_box4stsd
{
int entry_count;
//TODO
} T_BOX4STSD;
/************************************************************************************************************
** stts: Time To Sample Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** entry count | 4 | sample_count和sample_delta的个数
** sample_count | 4 |
** sample_delta | 4 |
** "stts”"存储了sample的duration, 描述了sample时序的映射方法, 我们通过它可以找到任何时间的sample. "stts"可以
包含一个压缩的表来映射时间和sample序号, 用其他的表来提供每个sample的长度和指针. 表中每个条目提供了在同一个
时间偏移量里面连续的sample序号, 以及samples的偏移量. 递增这些偏移量, 就可以建立一个完整的time to sample表.
例: 说明该视频包含87帧数据(sample_count), 每帧包含512个采样(sample_delta). 总共512*87=44544个采样,
和我们前面mdhd box的Duration完全一致。
Duration/TimeScale = 44544/12288 = 3.625s, 正是我们的视频播放长度.
12288/512 = 24 p/s (帧率)
************************************************************************************************************/
typedef struct t_box4stts_entry
{
int sample_count;
int sample_delta;
} T_BOX4STTS_ENTRY;
typedef struct t_box4stts
{
int entry_count;
T_BOX4STTS_ENTRY entrys[MAX_STTS_ENTRY_NUM];
} T_BOX4STTS;
/************************************************************************************************************
** stss: Sync Sample Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** entry count | 4 | sample_num的个数
** sample_num | 4 |
** "stss"确定media中的关键帧. 对于压缩媒体数据, 关键帧是一系列压缩序列的开始帧, 其解压缩时不依赖以前的帧,
而后续帧的解压缩将依赖于这个关键帧. "stss"可以非常紧凑的标记媒体内的随机存取点, 它包含一个sample序号表,
表内的每一项严格按照sample的序号排列, 说明了媒体中的哪一个sample是关键帧. 如果此表不存在, 说明每一个sample
都是一个关键帧, 是一个随机存取点.
************************************************************************************************************/
typedef struct t_box4stss_entry
{
int sample_num;
} T_BOX4STSS_ENTRY;
typedef struct t_box4stss
{
int entry_count;
T_BOX4STSS_ENTRY entrys[MAX_STSS_ENTRY_NUM];
} T_BOX4STSS;
/************************************************************************************************************
** stsc: Sample To Chunk Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** entry count | 4 | entry的个数
** first_chunk | 4 |
** samples_per_chunk | 4 |
** sample_des_index | 4 |
** 用chunk组织sample可以方便优化数据获取, 一个thunk包含一个或多个sample. "stsc"中用一个表描述了sample与chunk的映射关系,
查看这张表就可以找到包含指定sample的thunk, 从而找到这个sample.
************************************************************************************************************/
typedef struct t_box4stsc_entry
{
int first_chunk;
int samples_per_chunk;
int sample_description_index;
} T_BOX4STSC_ENTRY;
typedef struct t_box4stsc
{
int entry_count;
T_BOX4STSC_ENTRY entrys[MAX_STSC_ENTRY_NUM];
} T_BOX4STSC;
/************************************************************************************************************
** stsz: Sample To Chunk Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** sample_size | 4 |
** sample_count | 4 | entry的个数
** entry_size | 4 |
** "stsz"定义了每个sample的大小, 包含了媒体中全部sample的数目和一张给出每个sample大小的表. 这个box相对来说体积是比较大的.
************************************************************************************************************/
typedef struct t_box4stsz_entry
{
int entry_size;
} T_BOX4STSZ_ENTRY;
typedef struct t_box4stsz
{
int sample_size;
int sample_count;
T_BOX4STSZ_ENTRY entrys[MAX_STSZ_ENTRY_NUM];
} T_BOX4STSZ;
/************************************************************************************************************
** stco: Chunk Offset Box
**
-------------------------------------------------------------------------------------------------------------
** 字段名称 | 长度(bytes) | 有关描述
-------------------------------------------------------------------------------------------------------------
** boxsize | 4 | box的长度
** boxtype | 4 | box的类型
** version | 1 | box版本，0或1，一般为0（以下字节数均按version = 0）
** flags | 3 |
** entry_count | 4 |
** chunk_offset | 4 |
** "stco"定义了每个thunk在媒体流中的位置, sample的偏移可以根据其他box推算出来. 位置有两种可能, 32位的和64位的,
后者对非常大的电影很有用. 在一个表中只会有一种可能, 这个位置是在整个文件中的, 而不是在任何box中的.
这样做就可以直接在文件中找到媒体数据, 而不用解释box. 需要注意的是一旦前面的box有了任何改变, 这张表都要重新建立, 因为位置信息已经改变了.
************************************************************************************************************/
typedef struct t_box4stco_entry
{
int chunk_offset;
} T_BOX4STCO_ENTRY;
typedef struct t_box4stco
{
int entry_count;
T_BOX4STCO_ENTRY entrys[MAX_STCO_ENTRY_NUM];
} T_BOX4STCO;
typedef struct t_box
{
T_BOX_HEADER boxHeader;
unsigned char *boxData;
} T_BOX;
static void DealBox4ftyp(const T_BOX *box)
{
int i = 0;
//int j = 0;
int brandsNum = 0;
T_BOX4FTYP box4ftyp = {0};
memset(&box4ftyp, 0x0, sizeof(T_BOX4FTYP));
memcpy(box4ftyp.major_brand, box->boxData, 4);
box4ftyp.major_brand[MAX_FTYP_BRABDS_LEN] = '\0';
box4ftyp.minor_version = box->boxData[4] << 24 | box->boxData[5] << 16 | box->boxData[6] << 8 | box->boxData[7];
brandsNum = (box->boxHeader.boxSize - MAX_BOX_SIZE_LEN - MAX_BOX_TYPE_LEN - MAX_FTYP_BRABDS_LEN - 4) / 4;
/* 1. if not have '\0', 每个brands的内存是连续的, 导致打印时后面的每4个数据都会加到前面;
2. unsigned char brands[MAX_FTYP_BRABDS_LEN+1]; 可解决, 此时也不必加'\0', 但需初始化;
3. 因此字符串最好定义+1并赋'\0';
4. 复现: unsigned char brands[MAX_FTYP_BRABDS_LEN]
*/
for (i=0; i<brandsNum; i++)
{
memcpy(box4ftyp.compatible_brands[i].brands, box->boxData+MAX_FTYP_BRABDS_LEN+4+4*i, 4);
box4ftyp.compatible_brands[i].brands[MAX_FTYP_BRABDS_LEN] = '\0';
}
#ifdef PRINTF_DEBUG
printf("\tmajor_brand: %s, minor_version: %d, compatible_brands: ", box4ftyp.major_brand, box4ftyp.minor_version);
for (i=0; i<brandsNum; i++)
{
if (i==brandsNum-1)
{
printf("%s", box4ftyp.compatible_brands[i].brands);
}
else
{
printf("%s,", box4ftyp.compatible_brands[i].brands);
}
}
printf("\n");
#endif
}
static void DealBox4mvhd(const unsigned char *mvhdData)
{
unsigned char *data = NULL;
T_BOX4MVHD box4mvhd = {0};
memset(&box4mvhd, 0x0, sizeof(T_BOX4MVHD));
data = (unsigned char *)mvhdData;
data += 4;
box4mvhd.creation_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mvhd.modification_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mvhd.timescale = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mvhd.duration = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
//box4mvhd.rate = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
box4mvhd.rate = (data[0] << 8 | data[1]) + (data[2] << 8 | data[3]);
data += 4;
//box4mvhd.volume = data[0] << 8 | data[1];
box4mvhd.volume = data[0] + data[1];
data += 2;
data += (MAX_MVHD_RESERVED_LEN + MAX_PRE_DEFINE_LEN + MAX_MATRIX_LEN);
box4mvhd.next_track_id = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
#ifdef PRINTF_DEBUG
printf("\t\tcreation_time: %d, modification_time: %d, timescale: %d, duration: %d, rate: %f, volume: %f, next_track_id: %d\n",
box4mvhd.creation_time, box4mvhd.modification_time, box4mvhd.timescale, box4mvhd.duration, box4mvhd.rate, box4mvhd.volume, box4mvhd.next_track_id);
#endif
}
static void DealBox4tkhd(const unsigned char *tkhdData)
{
unsigned char *data = NULL;
T_BOX4TKHD box4tkhd = {0};
memset(&box4tkhd, 0x0, sizeof(box4tkhd));
data = (unsigned char *)tkhdData;
box4tkhd.flags = data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4tkhd.creation_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4tkhd.modification_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4tkhd.track_id = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
data += 4; /* 4 reserved */
box4tkhd.duration = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
data += 8; /* 8 reserved */
box4tkhd.layer = data[0] << 8 | data[1];
data += 2;
box4tkhd.alternate_group = data[0] << 8 | data[1];
data += 2;
box4tkhd.volume = data[0] + data[1];
data += 2;
data += 2;
data += 36;
box4tkhd.width = (data[0] << 8 | data[1]) + (data[2] << 8 | data[3]);
data += 4;
box4tkhd.height = (data[0] << 8 | data[1]) + (data[2] << 8 | data[3]);
#ifdef PRINTF_DEBUG
printf("\t\t\tflags: %d, creation_time: %d, modification_time: %d, track_id: %d, duration: %d, layer: %d, alternate_group: %d, volume: %f, width: %f, height: %f\n",
box4tkhd.flags, box4tkhd.creation_time, box4tkhd.modification_time, box4tkhd.track_id, box4tkhd.duration, box4tkhd.layer, box4tkhd.alternate_group, box4tkhd.volume, box4tkhd.width, box4tkhd.height);
#endif
}
static void DealBox4dref(const T_BOX *box)
{
// TODO
}
static void DealBox4dinf(const T_BOX *box)
{ int boxSize = 0;
int dinfDataSize = 0;
unsigned char *dinfData = NULL;
//unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
T_BOX drefBox = {0};
dinfData = box->boxData;
dinfDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (dinfDataSize > 0)
{
boxSize = dinfData[0] << 24 | dinfData[1] << 16 | dinfData[2] << 8 | dinfData[3];
memcpy(boxType, dinfData+MAX_BOX_SIZE_LEN, 4);
#ifdef PRINTF_DEBUG
printf("\t\t\t\t\t****BOX: Layer6****\n");
printf("\t\t\t\t\t\tsize: %d\n", boxSize);
printf("\t\t\t\t\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_DREF))
{
memset(&drefBox, 0x0, sizeof(T_BOX));
drefBox.boxHeader.boxSize = boxSize;
memcpy(drefBox.boxHeader.boxType, boxType, strlen(boxType));
drefBox.boxData = (unsigned char*)malloc(boxSize);
if (drefBox.boxData)
{
memcpy(drefBox.boxData, dinfData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4dref((const T_BOX*)&drefBox);
free(drefBox.boxData);
drefBox.boxData = NULL;
}
}
dinfData += boxSize;
dinfDataSize -= boxSize;
}
}
static void DealBox4stts(const unsigned char *sttsData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4STTS box4stts = {0};
memset(&box4stts, 0x0, sizeof(box4stts));
data = (unsigned char *)sttsData;
data += 4;
box4stts.entry_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
for (i=0; i<box4stts.entry_count; i++)
{
if (i == MAX_STTS_ENTRY_NUM)
{
break;
}
box4stts.entrys[i].sample_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4stts.entrys[i].sample_delta = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
}
#ifdef PRINTF_DEBUG
printf("\t\t\tentry_count: %d, [sample_count, sample_delta]: ", box4stts.entry_count);
if (box4stts.entry_count>MAX_STTS_ENTRY_NUM)
{
box4stts.entry_count = MAX_STTS_ENTRY_NUM;
}
for (i=0; i<box4stts.entry_count; i++)
{
if (i>0)
{
printf(", ");
}
printf("[%d, %d]", box4stts.entrys[i].sample_count, box4stts.entrys[i].sample_delta);
}
if (box4stts.entry_count==MAX_STTS_ENTRY_NUM)
{
printf("...(just show %d now)", MAX_STTS_ENTRY_NUM);
}
printf("\n");
#endif
}
static void DealBox4stss(const unsigned char *stssData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4STSS box4stss = {0};
memset(&box4stss, 0x0, sizeof(box4stss));
data = (unsigned char *)stssData;
data += 4;
box4stss.entry_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
for (i=0; i<box4stss.entry_count; i++)
{
if (i == MAX_STSS_ENTRY_NUM)
{
break;
}
box4stss.entrys[i].sample_num = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
}
#ifdef PRINTF_DEBUG
printf("\t\t\tentry_count: %d, sample_num: ", box4stss.entry_count);
if (box4stss.entry_count>MAX_STSS_ENTRY_NUM)
{
box4stss.entry_count = MAX_STSS_ENTRY_NUM;
}
for (i=0; i<box4stss.entry_count; i++)
{
if (i>0)
{
printf(", ");
}
printf("%d", box4stss.entrys[i].sample_num);
}
if (box4stss.entry_count==MAX_STSS_ENTRY_NUM)
{
printf("...(just show %d now)", MAX_STSS_ENTRY_NUM);
}
printf("\n");
#endif
}
static void DealBox4stsc(const unsigned char *stscData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4STSC box4stsc = {0};
memset(&box4stsc, 0x0, sizeof(box4stsc));
data = (unsigned char *)stscData;
data += 4;
box4stsc.entry_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
for (i=0; i<box4stsc.entry_count; i++)
{
if (i == MAX_STSC_ENTRY_NUM)
{
break;
}
box4stsc.entrys[i].first_chunk = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4stsc.entrys[i].samples_per_chunk = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4stsc.entrys[i].sample_description_index = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
}
#ifdef PRINTF_DEBUG
printf("\t\t\tentry_count: %d, [first_chunk, samples_per_chunk, sample_description_index]: ", box4stsc.entry_count);
if (box4stsc.entry_count>MAX_STSC_ENTRY_NUM)
{
box4stsc.entry_count = MAX_STSC_ENTRY_NUM;
}
for (i=0; i<box4stsc.entry_count; i++)
{
if (i>0)
{
printf(", ");
}
printf("[%d, %d, %d]", box4stsc.entrys[i].first_chunk, box4stsc.entrys[i].samples_per_chunk, box4stsc.entrys[i].sample_description_index);
}
if (box4stsc.entry_count==MAX_STSC_ENTRY_NUM)
{
printf("...(just show %d now)", MAX_STSC_ENTRY_NUM);
}
printf("\n");
#endif
}
static void DealBox4stsz(const unsigned char *stszData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4STSZ box4stsz = {0};
memset(&box4stsz, 0x0, sizeof(box4stsz));
data = (unsigned char *)stszData;
data += 4;
box4stsz.sample_size = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4stsz.sample_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
for (i=0; i<box4stsz.sample_count; i++)
{
if (i == MAX_STSZ_ENTRY_NUM)
{
break;
}
box4stsz.entrys[i].entry_size = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
}
#ifdef PRINTF_DEBUG
printf("\t\t\tsample_size: %d, sample_count: %d, [entry_size]: ", box4stsz.sample_size, box4stsz.sample_count);
if (box4stsz.sample_count>MAX_STSZ_ENTRY_NUM)
{
box4stsz.sample_count = MAX_STSZ_ENTRY_NUM;
}
for (i=0; i<box4stsz.sample_count; i++)
{
if (i>0)
{
printf(", ");
}
printf("[%d]", box4stsz.entrys[i].entry_size);
}
if (box4stsz.sample_count==MAX_STSZ_ENTRY_NUM)
{
printf("...(just show %d now)", MAX_STSZ_ENTRY_NUM);
}
printf("\n");
#endif
}
static void DealBox4stco(const unsigned char *stcoData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4STCO box4stco = {0};
memset(&box4stco, 0x0, sizeof(box4stco));
data = (unsigned char *)stcoData;
data += 4;
box4stco.entry_count = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
for (i=0; i<box4stco.entry_count; i++)
{
if (i == MAX_STCO_ENTRY_NUM)
{
break;
}
box4stco.entrys[i].chunk_offset = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
}
#ifdef PRINTF_DEBUG
printf("\t\t\entry_count: %d, [chunk_offset]: ", box4stco.entry_count);
if (box4stco.entry_count>MAX_STCO_ENTRY_NUM)
{
box4stco.entry_count = MAX_STCO_ENTRY_NUM;
}
for (i=0; i<box4stco.entry_count; i++)
{
if (i>0)
{
printf(", ");
}
printf("[%d]", box4stco.entrys[i].chunk_offset);
}
if (box4stco.entry_count==MAX_STCO_ENTRY_NUM)
{
printf("...(just show %d now)", MAX_STCO_ENTRY_NUM);
}
printf("\n");
#endif
}
static void DealBox4stbl(const T_BOX *box)
{
int boxSize = 0;
int stblDataSize = 0;
unsigned char *stblData = NULL;
unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
stblData = box->boxData;
stblDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (stblDataSize > 0)
{
boxSize = stblData[0] << 24 | stblData[1] << 16 | stblData[2] << 8 | stblData[3];
memcpy(boxType, stblData+MAX_BOX_SIZE_LEN, 4);
#ifdef PRINTF_DEBUG
printf("\t\t\t\t\t****BOX: Layer6****\n");
printf("\t\t\t\t\t\tsize: %d\n", boxSize);
printf("\t\t\t\t\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_STTS))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, stblData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stts(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_STSS))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, stblData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stss(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_STSC))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, stblData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stsc(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_STSZ))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, stblData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stsz(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_STCO))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, stblData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stco(data);
free(data);
data = NULL;
}
}
stblData += boxSize;
stblDataSize -= boxSize;
}
}
static void DealBox4mdhd(const unsigned char *mdhdData)
{
unsigned char *data = NULL;
T_BOX4MDHD box4mdhd = {0};
memset(&box4mdhd, 0x0, sizeof(box4mdhd));
data = (unsigned char *)mdhdData;
data += 4;
box4mdhd.creation_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mdhd.modification_time = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mdhd.timescale = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mdhd.duration = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3];
data += 4;
box4mdhd.language = data[0] << 8 | data[1];
#ifdef PRINTF_DEBUG
//printf("\t\t\tcreation_time: %d, modification_time: %d, timescale: %d, duration: %d, language: %c%c%c\n",
//box4mdhd.creation_time, box4mdhd.modification_time, box4mdhd.timescale, box4mdhd.duration, (box4mdhd.language>>10&0x1f), (box4mdhd.language>>5&0x1f), (box4mdhd.language&0x1f));
printf("\t\t\t\tcreation_time: %d, modification_time: %d, timescale: %d, duration: %d, language:%d\n",
box4mdhd.creation_time, box4mdhd.modification_time, box4mdhd.timescale, box4mdhd.duration, box4mdhd.language);
#endif
}
static void DealBox4hdlr(const unsigned char *hdlrData)
{
int i = 0;
unsigned char *data = NULL;
T_BOX4HDLR box4hdlr = {0};
memset(&box4hdlr, 0x0, sizeof(box4hdlr));
data = (unsigned char *)hdlrData;
data += 4;
data += 4;
memcpy(box4hdlr.handler_type, data, 4);
box4hdlr.handler_type[MAX_HANDLER_TYPE_LEN] = '\0';
data += 4;
data += 12;
while ('\0' != data[i])
{
i++;
}
memcpy(box4hdlr.name, data, i);
box4hdlr.name[MAX_HDLR_NAME_LEN] = '\0';
#ifdef PRINTF_DEBUG
printf("\t\t\t\thandler_type: %s, name: %s\n", box4hdlr.handler_type, box4hdlr.name);
#endif
}
static void DealBox4vmdhd(const unsigned char *vmdhdData)
{
// TODO
}
static void DealBox4minf(const T_BOX *box)
{ int boxSize = 0;
int minfDataSize = 0;
unsigned char *minfData = NULL;
unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
T_BOX dinfBox = {0};
T_BOX stblBox = {0};
minfData = box->boxData;
minfDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (minfDataSize > 0)
{
boxSize = minfData[0] << 24 | minfData[1] << 16 | minfData[2] << 8 | minfData[3];
memcpy(boxType, minfData+MAX_BOX_SIZE_LEN, 4);
#ifdef PRINTF_DEBUG
printf("\t\t\t\t********BOX: Layer5********\n");
printf("\t\t\t\t\tsize: %d\n", boxSize);
printf("\t\t\t\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_VMHD))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, minfData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4vmdhd(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_DINF))
{
memset(&dinfBox, 0x0, sizeof(T_BOX));
dinfBox.boxHeader.boxSize = boxSize;
memcpy(dinfBox.boxHeader.boxType, boxType, strlen(boxType));
dinfBox.boxData = (unsigned char*)malloc(boxSize);
if (dinfBox.boxData)
{
memcpy(dinfBox.boxData, minfData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4dinf((const T_BOX*)&dinfBox);
free(dinfBox.boxData);
dinfBox.boxData = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_STBL))
{
memset(&stblBox, 0x0, sizeof(T_BOX));
stblBox.boxHeader.boxSize = boxSize;
memcpy(stblBox.boxHeader.boxType, boxType, strlen(boxType));
stblBox.boxData = (unsigned char*)malloc(boxSize);
if (stblBox.boxData)
{
memcpy(stblBox.boxData, minfData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4stbl((const T_BOX*)&stblBox);
free(stblBox.boxData);
stblBox.boxData = NULL;
}
}
minfData += boxSize;
minfDataSize -= boxSize;
}
}
static void DealBox4mdia(const T_BOX *box)
{ int boxSize = 0;
int mdiaDataSize = 0;
unsigned char *mdiaData = NULL;
unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
T_BOX minfBox = {0};
mdiaData = box->boxData;
mdiaDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (mdiaDataSize > 0)
{
boxSize = mdiaData[0] << 24 | mdiaData[1] << 16 | mdiaData[2] << 8 | mdiaData[3];
memcpy(boxType, mdiaData+MAX_BOX_SIZE_LEN, 4);
#ifdef PRINTF_DEBUG
printf("\t\t\t************BOX: Layer4************\n");
printf("\t\t\t\tsize: %d\n", boxSize);
printf("\t\t\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_MDHD))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, mdiaData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4mdhd(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_HDLR))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, mdiaData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4hdlr(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_MINF))
{
memset(&minfBox, 0x0, sizeof(T_BOX));
minfBox.boxHeader.boxSize = boxSize;
memcpy(minfBox.boxHeader.boxType, boxType, strlen(boxType));
minfBox.boxData = (unsigned char*)malloc(boxSize);
if (minfBox.boxData)
{
memcpy(minfBox.boxData, mdiaData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4minf((const T_BOX*)&minfBox);
free(minfBox.boxData);
minfBox.boxData = NULL;
}
}
mdiaData += boxSize;
mdiaDataSize -= boxSize;
}
}
static void DealBox4trak(const T_BOX *box)
{
int boxSize = 0;
int trakDataSize = 0;
unsigned char *trakData = NULL;
unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
T_BOX mdiaBox = {0};
trakData = box->boxData;
trakDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (trakDataSize > 0)
{
boxSize = trakData[0] << 24 | trakData[1] << 16 | trakData[2] << 8 | trakData[3];
memcpy(boxType, trakData+MAX_BOX_SIZE_LEN, 4);
#ifdef PRINTF_DEBUG
printf("\t\t****************BOX: Layer3****************\n");
printf("\t\t\tsize: %d\n", boxSize);
printf("\t\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_TKHD))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, trakData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4tkhd(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_MDIA))
{
memset(&mdiaBox, 0x0, sizeof(T_BOX));
mdiaBox.boxHeader.boxSize = boxSize;
memcpy(mdiaBox.boxHeader.boxType, boxType, strlen(boxType));
mdiaBox.boxData = (unsigned char*)malloc(boxSize);
if (mdiaBox.boxData)
{
memcpy(mdiaBox.boxData, trakData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4mdia((const T_BOX*)&mdiaBox);
free(mdiaBox.boxData);
mdiaBox.boxData = NULL;
}
}
trakData += boxSize;
trakDataSize -= boxSize;
}
}
static void DealBox4moov(const T_BOX *box)
{
int boxSize = 0;
int moovDataSize = 0;
unsigned char *moovData = NULL;
unsigned char *data = NULL;
char boxType[MAX_BOX_TYPE_LEN+1] = {0};
T_BOX trakBox = {0};
moovData = box->boxData;
moovDataSize = box->boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN;
while (moovDataSize > 0)
{
boxSize = moovData[0] << 24 | moovData[1] << 16 | moovData[2] << 8 | moovData[3];
memcpy(boxType, moovData+MAX_BOX_SIZE_LEN, 4);
boxType[MAX_BOX_TYPE_LEN] = '\0';
#ifdef PRINTF_DEBUG
printf("\t********************BOX: Layer2********************\n");
printf("\t\tsize: %d\n", boxSize);
printf("\t\ttype: %s\n", boxType);
#endif
if (0 == strcmp(boxType, BOX_TYPE_MVHD))
{
data = (unsigned char*)malloc(boxSize);
if (data)
{
memcpy(data, moovData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4mvhd(data);
free(data);
data = NULL;
}
}
else if (0 == strcmp(boxType, BOX_TYPE_TRAK))
{
memset(&trakBox, 0x0, sizeof(T_BOX));
trakBox.boxHeader.boxSize = boxSize;
memcpy(trakBox.boxHeader.boxType, boxType, strlen(boxType));
trakBox.boxData = (unsigned char*)malloc(boxSize);
if (trakBox.boxData)
{
memcpy(trakBox.boxData, moovData+MAX_BOX_SIZE_LEN+MAX_BOX_TYPE_LEN, boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
DealBox4trak((const T_BOX*)&trakBox);
free(trakBox.boxData);
trakBox.boxData = NULL;
}
}
moovData += boxSize;
moovDataSize -= boxSize;
}
}
static void DealBox(const T_BOX *box)
{
#ifdef PRINTF_DEBUG
printf("****************************BOX: Layer1****************************\n");
printf("\tsize: %d\n", box->boxHeader.boxSize);
printf("\ttype: %s\n", box->boxHeader.boxType);
#endif
if (0 == strcmp((const char *)box->boxHeader.boxType, (const char *)BOX_TYPE_FTYPE))
{
DealBox4ftyp(box);
}
else if (0 == strcmp((const char *)box->boxHeader.boxType, (const char *)BOX_TYPE_MOOV))
{
DealBox4moov(box);
}
}
int main(int argc, char *argv[])
{
unsigned char boxSize[MAX_BOX_SIZE_LEN] = {0};
FILE *fp = NULL;
T_BOX box = {0};
if (2 != argc)
{
printf("Usage: mp4parse **.mp4\n");
return -1;
}
fp = fopen(argv[1], "rb");
if (!fp)
{
printf("open file[%s] error!\n", argv[1]);
return -1;
}
while (1)
{
memset(&box, 0x0, sizeof(T_BOX));
if (fread(boxSize, 1, 4, fp) <= 0)
{
break;
}
box.boxHeader.boxSize = boxSize[0] << 24 | boxSize[1] << 16 | boxSize[2] << 8 | boxSize[3];
fread(box.boxHeader.boxType, 1, 4, fp);
box.boxHeader.boxType[MAX_BOX_TYPE_LEN] = '\0';
box.boxData = (unsigned char*)malloc(box.boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN);
if (!box.boxData)
{
printf("malloc data error!\n");
break;
}
fread(box.boxData, 1, box.boxHeader.boxSize-MAX_BOX_SIZE_LEN-MAX_BOX_TYPE_LEN, fp);
printf("\n=====================================\n");
/* deal box data */
DealBox(&box);
/* free box */
free(box.boxData);
box.boxData = NULL;
}
fclose(fp);
printf("\n");
return 0;
}
演示
[fly@752fac4b02e9 00-MP4Parser]$ make clean
rm -f a.out MP4Parser
[fly@752fac4b02e9 00-MP4Parser]$ make
cc -o MP4Parser MP4Parser.c -g -Wall -lm
[fly@752fac4b02e9 00-MP4Parser]$ ls
20241211_103341_0020_A.MP4 Makefile MP4Parser MP4Parser.c MP4Parser.h
[fly@752fac4b02e9 00-MP4Parser]$ ./MP4Parser 20241211_103341_0020_A.MP4
=====================================
****************************BOX: Layer1****************************
size: 28
type: ftyp
major_brand: mp42, minor_version: 0, compatible_brands: isom,avc1,mp42
=====================================
****************************BOX: Layer1****************************
size: 20100
type: skip
=====================================
****************************BOX: Layer1****************************
size: 111353112
type: mdat
=====================================
****************************BOX: Layer1****************************
size: 35100
type: moov
********************BOX: Layer2********************
size: 108
type: mvhd
creation_time: -478209215, modification_time: -478209215, timescale: 92400, duration: 5544000, rate: 1.000000, volume: 1.000000, next_track_id: 3
********************BOX: Layer2********************
size: 22710
type: trak
****************BOX: Layer3****************
size: 92
type: tkhd
flags: 15, creation_time: -478209215, modification_time: -478209215, track_id: 1, duration: 5544000, layer: 0, alternate_group: 0, volume: 0.000000, width: 2560.000000, height: 1440.000000
****************BOX: Layer3****************
size: 22610
type: mdia
************BOX: Layer4************
size: 32
type: mdhd
creation_time: -478209215, modification_time: -478209215, timescale: 92400, duration: 5544000, language:0
************BOX: Layer4************
size: 45
type: hdlr
handler_type: vide, name:
VideoHandler
************BOX: Layer4************
size: 22525
type: minf
********BOX: Layer5********
size: 20
type: vmhd
********BOX: Layer5********
size: 44
type: hdlr
********BOX: Layer5********
size: 36
type: dinf
****BOX: Layer6****
size: 28
type: dref
********BOX: Layer5********
size: 22417
type: stbl
****BOX: Layer6****
size: 225
type: stsd
****BOX: Layer6****
size: 24
type: stts
entry_count: 1, [sample_count, sample_delta]: [1800, 3080]
****BOX: Layer6****
size: 496
type: stss
entry_count: 120, sample_num: 1, 16, 31, 46, 61, 76, 91, 106...(just show 8 now)
****BOX: Layer6****
size: 28
type: stsc
entry_count: 1, [first_chunk, samples_per_chunk, sample_description_index]: [1, 1, 1]
****BOX: Layer6****
size: 7220
type: stsz
sample_size: 0, sample_count: 1800, [entry_size]: [82131], [57695], [57111], [57473], [57050], [57493], [58025], [58169], [59855], [58491], [57972], [56701], [56552], [58768], [61443], [98901], [55968], [53286], [54026], [54212], [55800], [54518], [51819], [55666], [53734], [58426], [59647], [59919], [58575], [65054], [91548], [56979], [57223], [56495], [56882], [56405], [57225], [58475], [57025], [55040], [56343], [57450], [59858], [58927], [59552], [92405], [57185], [55376], [54453], [57618], [56854], [57775], [56262], [57266], [58742], [58777], [58896], [58481], [57592], [60597], [83526], [57731], [57413], [55612], [57602], [56864], [58129], [55354], [55384], [53694], [59621], [58191], [59478], [59197], [66161], [90683], [57589], [55651], [59535], [58239], [58271], [56469], [62643], [60543], [66631], [61779], [57583], [51429], [52775], [52517], [83308], [57529], [56762], [57441], [59046], [57500], [57492], [58551], [56506], [57538]...(just show 100 now)
****BOX: Layer6****
size: 14416
type: co64
********************BOX: Layer2********************
size: 11720
type: trak
****************BOX: Layer3****************
size: 92
type: tkhd
flags: 15, creation_time: -478209215, modification_time: -478209215, track_id: 2, duration: 5541043, layer: 0, alternate_group: 0, volume: 1.000000, width: 0.000000, height: 0.000000
****************BOX: Layer3****************
size: 11620
type: mdia
************BOX: Layer4************
size: 32
type: mdhd
creation_time: -478209215, modification_time: -478209215, timescale: 16000, duration: 959487, language:0
************BOX: Layer4************
size: 45
type: hdlr
handler_type: soun, name:
SoundHandler
************BOX: Layer4************
size: 11535
type: minf
********BOX: Layer5********
size: 16
type: smhd
********BOX: Layer5********
size: 44
type: hdlr
********BOX: Layer5********
size: 36
type: dinf
****BOX: Layer6****
size: 28
type: dref
********BOX: Layer5********
size: 11431
type: stbl
****BOX: Layer6****
size: 91
type: stsd
****BOX: Layer6****
size: 24
type: stts
entry_count: 1, [sample_count, sample_delta]: [937, 1024]
****BOX: Layer6****
size: 28
type: stsc
entry_count: 1, [first_chunk, samples_per_chunk, sample_description_index]: [1, 1, 1]
****BOX: Layer6****
size: 3768
type: stsz
sample_size: 0, sample_count: 937, [entry_size]: [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512], [512]...(just show 100 now)
****BOX: Layer6****
size: 7512
type: co64
********************BOX: Layer2********************
size: 58
type: udta
********************BOX: Layer2********************
size: 496
type: gps
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