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#include <windows.h>
#include "header_asf.h"
#include <mmsystem.h>
#include <stdio.h>
#include <bfc/platform/types.h>
#pragma pack(1)
///////////////////////
// MS GUID definition
///////////////////////
#ifndef GUID_DEFINED
#define GUID_DEFINED
// Size of GUID is 16 bytes!
typedef struct {
uint32_t Data1; // 4 bytes
uint16_t Data2; // 2 bytes
uint16_t Data3; // 2 bytes
uint8_t Data4[8]; // 8 bytes
} GUID_t;
#endif
///////////////////////
// ASF Object Header
///////////////////////
typedef struct {
uint8_t guid[16];
uint64_t size;
} ASF_obj_header_t;
////////////////
// ASF Header
////////////////
typedef struct {
ASF_obj_header_t objh;
uint32_t cno; // number of subchunks
uint8_t v1; // unknown (0x01)
uint8_t v2; // unknown (0x02)
} ASF_header_t;
/////////////////////
// ASF File Header
/////////////////////
typedef struct {
uint8_t client[16]; // Client GUID
uint64_t file_size;
uint64_t creat_time; //File creation time FILETIME 8
uint64_t packets; //Number of packets UINT64 8
uint64_t end_timestamp; //Timestamp of the end position UINT64 8
uint64_t duration; //Duration of the playback UINT64 8
uint32_t start_timestamp; //Timestamp of the start position UINT32 4
uint32_t preroll; //Time to bufferize before playing UINT32 4
uint32_t flags; //Unknown, maybe flags ( usually contains 2 ) UINT32 4
uint32_t packetsize; //Size of packet, in bytes UINT32 4
uint32_t packetsize2; //Size of packet ( confirm ) UINT32 4
uint32_t frame_size; //Size of uncompressed video frame UINT32 4
} ASF_file_header_t;
///////////////////////
// ASF Stream Header
///////////////////////
typedef struct {
uint8_t type[16]; // Stream type (audio/video) GUID 16
uint8_t concealment[16]; // Audio error concealment type GUID 16
uint64_t unk1; // Unknown, maybe reserved ( usually contains 0 ) UINT64 8
uint32_t type_size; //Total size of type-specific data UINT32 4
uint32_t stream_size; //Size of stream-specific data UINT32 4
uint16_t stream_no; //Stream number UINT16 2
uint32_t unk2; //Unknown UINT32 4
} ASF_stream_header_t;
///////////////////////////
// ASF Content Description
///////////////////////////
typedef struct {
uint16_t title_size;
uint16_t author_size;
uint16_t copyright_size;
uint16_t comment_size;
uint16_t rating_size;
} ASF_content_description_t;
////////////////////////
// ASF Segment Header
////////////////////////
typedef struct {
uint8_t streamno;
uint8_t seq;
uint32_t x;
uint8_t flag;
} ASF_segmhdr_t;
//////////////////////
// ASF Stream Chunck
//////////////////////
typedef struct {
uint16_t type;
uint16_t size;
uint32_t sequence_number;
uint16_t unknown;
uint16_t size_confirm;
} ASF_stream_chunck_t;
#pragma pack()
// Definition of the differents type of ASF streaming
typedef enum {
ASF_Unknown_e,
ASF_Live_e,
ASF_Prerecorded_e,
ASF_Redirector_e,
ASF_PlainText_e
} ASF_StreamType_e;
#define ASF_LOAD_GUID_PREFIX(guid) (*(uint32_t *)(guid))
#define ASF_GUID_PREFIX_audio_stream 0xF8699E40
#define ASF_GUID_PREFIX_video_stream 0xBC19EFC0
#define ASF_GUID_PREFIX_audio_conceal_none 0x49f1a440
#define ASF_GUID_PREFIX_audio_conceal_interleave 0xbfc3cd50
#define ASF_GUID_PREFIX_header 0x75B22630
#define ASF_GUID_PREFIX_data_chunk 0x75b22636
#define ASF_GUID_PREFIX_index_chunk 0x33000890
#define ASF_GUID_PREFIX_stream_header 0xB7DC0791
#define ASF_GUID_PREFIX_header_2_0 0xD6E229D1
#define ASF_GUID_PREFIX_file_header 0x8CABDCA1
#define ASF_GUID_PREFIX_content_desc 0x75b22633
HeaderAsf::HeaderAsf()
{
}
int HeaderAsf::getInfos(const wchar_t *filename, bool checkMetadata)
{
ASF_header_t asfh;
DWORD bytesRead = 0;
unsigned char asfhdrguid[16]={0x30,0x26,0xB2,0x75,0x8E,0x66,0xCF,0x11,0xA6,0xD9,0x00,0xAA,0x00,0x62,0xCE,0x6C};
HANDLE fh=CreateFileW(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (fh==INVALID_HANDLE_VALUE)
return 0;
ReadFile(fh,&asfh, sizeof(ASF_header_t), &bytesRead, NULL);
// check for ASF guid
if(memcmp(asfhdrguid,asfh.objh.guid,16) || asfh.cno>256)
{
CloseHandle(fh);
return 0;
}
for(int i=0;i<(int)asfh.cno;i++) {
int pos = SetFilePointer(fh, 0, 0, FILE_CURRENT);
ASF_obj_header_t objh;
bytesRead = 0;
ReadFile(fh, &objh, sizeof(objh), &bytesRead, NULL);
switch(ASF_LOAD_GUID_PREFIX(objh.guid)) {
case ASF_GUID_PREFIX_file_header:
{
ASF_file_header_t fileh;
bytesRead = 0;
ReadFile(fh, &fileh, sizeof(fileh), &bytesRead, NULL);
length=(int)(fileh.duration/10000);
}
break;
case ASF_GUID_PREFIX_stream_header:
{
ASF_stream_header_t streamh;
bytesRead = 0;
ReadFile(fh, &streamh, sizeof(streamh), &bytesRead, NULL);
switch(ASF_LOAD_GUID_PREFIX(streamh.type))
{
case ASF_GUID_PREFIX_audio_stream:
{
WAVEFORMATEX wfe = {0};
bytesRead = 0;
ReadFile(fh, &wfe, sizeof(wfe), &bytesRead, NULL);
audio_bps=wfe.wBitsPerSample;
audio_srate=wfe.nSamplesPerSec;
audio_nch=wfe.nChannels;
has_audio=true;
}
break;
case ASF_GUID_PREFIX_video_stream:
{
bytesRead = 0;
ReadFile(fh, &video_w, sizeof(video_w), &bytesRead, NULL);
bytesRead = 0;
ReadFile(fh, &video_h, sizeof(video_h), &bytesRead, NULL);
has_video=true;
}
break;
}
}
break;
}
SetFilePointer(fh, pos+(int)objh.size, NULL, FILE_BEGIN);
}
CloseHandle(fh);
return 1;
}
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