/**
* Takes an initialized asf_file_t structure file as a parameter. Allocates
* a new asf_object_header_t in file->header and uses the file->iostream to
* read all fields and subobjects into it. Finally calls the
* asf_parse_header_validate function to validate the values and parse the
* commonly used values into the asf_file_t struct itself.
*/
int
asf_parse_header(asf_file_t *file)
{
asf_object_header_t *header;
asf_iostream_t *iostream;
uint8_t hdata[30];
int tmp;
file->header = NULL;
iostream = &file->iostream;
/* object minimum is 24 bytes and header needs to have
* the subobject count field and two reserved fields */
tmp = asf_byteio_read(iostream, hdata, 30);
if (tmp < 0) {
/* not enough data to read the header object */
return tmp;
}
file->header = malloc(sizeof(asf_object_header_t));
header = file->header;
if (!header) {
return ASF_ERROR_OUTOFMEM;
}
/* read the object and check its size value */
asf_parse_read_object((asfint_object_t *) header, hdata);
if (header->size < 30) {
/* invalid size for header object */
return ASF_ERROR_INVALID_OBJECT_SIZE;
}
/* read header object specific compulsory fields */
header->subobjects = GetDWLE(hdata + 24);
header->reserved1 = hdata[28];
header->reserved2 = hdata[29];
/* clear header extension object and subobject list */
header->ext = NULL;
header->first = NULL;
header->last = NULL;
/* the header data needs to be allocated for reading */
header->datalen = header->size - 30;
header->data = malloc(header->datalen * sizeof(uint8_t));
if (!header->data) {
return ASF_ERROR_OUTOFMEM;
}
tmp = asf_byteio_read(iostream, header->data, header->datalen);
if (tmp < 0) {
return tmp;
}
if (header->subobjects > 0) {
uint64_t datalen;
uint8_t *data;
int i;
debug_printf("starting to read subobjects");
/* use temporary variables for use during the read */
datalen = header->datalen;
data = header->data;
for (i=0; i<header->subobjects; i++) {
asfint_object_t *current;
if (datalen < 24) {
/* not enough data for reading object */
break;
}
current = malloc(sizeof(asfint_object_t));
if (!current) {
return ASF_ERROR_OUTOFMEM;
}
asf_parse_read_object(current, data);
if (current->size > datalen || current->size < 24) {
/* invalid object size */
break;
}
/* Check if the current subobject is a header extension
* object or just a normal subobject */
if (current->type == GUID_HEADER_EXTENSION && !header->ext) {
int ret;
asf_object_headerext_t *headerext;
/* we handle header extension separately because it has
* some subobjects as well */
current = realloc(current, sizeof(asf_object_headerext_t));
headerext = (asf_object_headerext_t *) current;
headerext->first = NULL;
headerext->last = NULL;
ret = asf_parse_headerext(headerext, data, datalen);
if (ret < 0) {
/* error parsing header extension */
return ret;
}
header->ext = headerext;
} else {
if (current->type == GUID_HEADER_EXTENSION) {
debug_printf("WARNING! Second header extension object found, ignoring it!");
}
current->datalen = current->size - 24;
current->data = data + 24;
/* add to list of subobjects */
if (!header->first) {
header->first = current;
header->last = current;
} else {
header->last->next = current;
header->last = current;
}
}
data += current->size;
datalen -= current->size;
}
if (i != header->subobjects || datalen != 0) {
/* header data size doesn't match given subobject count */
return ASF_ERROR_INVALID_VALUE;
}
debug_printf("%d subobjects read successfully", i);
}
tmp = asf_parse_header_validate(file, file->header);
if (tmp < 0) {
/* header read ok but doesn't validate correctly */
return tmp;
}
debug_printf("header validated correctly");
return header->size;
}
/**
* Takes an initialized asf_file_t structure file as a parameter. Allocates
* a new asf_object_header_t in file->header and uses the file->iostream to
* read all fields and subobjects into it. Finally calls the
* asf_parse_header_validate function to validate the values and parse the
* commonly used values into the asf_file_t struct itself.
*/
int ASFParser::asf_parse_header() {
asf_object_header_t *header = NULL;
asf_iostream_t *iostream = NULL;
uint8_t hdata[30];
int tmp;
file->header = NULL;
iostream = &file->iostream;
/* object minimum is 24 bytes and header needs to have
* the subobject count field and two reserved fields */
memset(hdata, 0, 30);
tmp = ASFByteIO::asf_byteio_read(hdata, 30, iostream);
if (tmp < 0) {
/* not enough data to read the header object */
ALOGE("asf_parse_header:error 1\n");
return tmp;
}
file->header = (asf_object_header_t*)malloc(sizeof(asf_object_header_t));
if (!file->header) {
return ASF_ERROR_OUTOFMEM;
}
memset(file->header, 0, sizeof(asf_object_header_t));
header = file->header;
/* clear header extension object and subobject list */
header->ext = NULL;
header->first = NULL;
header->last = NULL;
/* read the object and check its size value */
asf_parse_read_object((asfint_object_t *) header, hdata);
if (header->size < 30) {
/* invalid size for header object */
ALOGE("asf_parse_header:error 2\n");
return ASF_ERROR_OBJECT_SIZE;
}
/* to check not ASF file type */
if (header->type == GUID_UNKNOWN) {
/* invalid GUID for header object */
return ASF_ERROR_INVALID_VALUE;
}
/* read header object specific compulsory fields */
header->subobjects = ASFByteIO::asf_byteio_getDWLE(hdata + 24);//sub header object number
header->reserved1 = hdata[28];
header->reserved2 = hdata[29];
header->datalen = header->size - 30;
//seek to Data Object and check if Data Object follows by Header Object
{
file->iostream.seek(iostream->source, header->size);
//read 50B from data_object
asfint_object_t *data = NULL;
uint8_t ddata[50];
int tmp;
memset(ddata, 0, 50);
/* object minimum is 24 bytes and data object needs to have
* 26 additional bytes for its internal fields */
tmp = ASFByteIO::asf_byteio_read(ddata, 50, iostream);
if (tmp < 0) {
ALOGI("read data 50B error");
return tmp;
}
data = (asfint_object_t*)calloc(1,sizeof(asfint_object_t));
if (!data) {
return ASF_ERROR_OUTOFMEM;
}
asf_parse_read_object((asfint_object_t *)data, ddata);
/* read the object and check its size value */
if (data->size < 50) {
/* invalid size for data object */
ALOGI("ASF Data Object Size Error");
return ASF_ERROR_OBJECT_SIZE;
} else if (data->type != GUID_DATA) {
ALOGE("Data Object Not follow by Header Object");
return ASF_ERROR_INVALID_OBJECT;
}
}
//seek to Header Object's data, and read header->data from iostream
file->iostream.seek(iostream->source, 30);
header->data = (uint8_t*)malloc(header->datalen * sizeof(uint8_t));
if (!header->data) {
return ASF_ERROR_OUTOFMEM;
}
memset(header->data, 0, header->datalen * sizeof(uint8_t));
tmp = ASFByteIO::asf_byteio_read(header->data, header->datalen, iostream);
if (tmp < 0) {
ALOGE("asf_parse_header:error 3\n");
return tmp;
}
if (header->subobjects > 0) {
uint64_t datalen;
uint8_t *data = NULL;
int i;
ALOGV("starting to read subobjects\n");
/* use temporary variables for use during the read */
datalen = header->datalen;
data = header->data;
for (i=0; i<header->subobjects; i++) {
void * tmp = NULL;
asfint_object_t *current = NULL;
if (datalen < 24) {//UUID+Size ==24
/* not enough data for reading object */
break;
}
//current = (asfint_object_t *)oscl_malloc(sizeof(asfint_object_t));
tmp = (void*)malloc(sizeof(asfint_object_t));
memset(tmp, 0, sizeof(asfint_object_t));
current = (asfint_object_t *)tmp;
if (!current) {
return ASF_ERROR_OUTOFMEM;
}
asf_parse_read_object(current, data);
if (current->size > datalen || current->size < 24) {
/* invalid object size */
ALOGE("invalid object size\n");
break;
}
/* Check if the current subobject is a header extension
* object or just a normal subobject */
if (current->type == GUID_HEADER_EXTENSION && !header->ext) {
int ret;
asf_object_headerext_t *headerext = NULL;
/* we handle header extension separately because it has
* some subobjects as well */
//current = (asf_object_headerext_t*)oscl_realloc(current, sizeof(asf_object_headerext_t));
//headerext = (asf_object_headerext_t *) current;
//changed by satish to fix compiler conversion problem
tmp = (void*)realloc(tmp, sizeof(asf_object_headerext_t));
current = (asfint_object_t *)tmp;
headerext = (asf_object_headerext_t *) tmp;
headerext->first = NULL;
headerext->last = NULL;
ret = asf_parse_headerext(headerext, data, datalen);
if (ret < 0) {
/* error parsing header extension */
return ret;
}
header->ext = headerext;
} else {
if (current->type == GUID_HEADER_EXTENSION) {
ALOGV("WARNING! Second header extension object found, ignoring it!\n");
}
current->datalen = current->size - 24;
current->data = data + 24;
/* add to list of subobjects */
if (!header->first) {
header->first = current;
header->last = current;
} else {
header->last->next = current;
header->last = current;
}
}
data += current->size;
datalen -= current->size;
}
if (i != header->subobjects || datalen != 0) {
/* header data size doesn't match given subobject count */
return ASF_ERROR_INVALID_VALUE;
}
ALOGV("%d subobjects read successfully\n", i);
}
tmp = asf_parse_header_validate(file->header);
if (tmp < 0) {
/* header read ok but doesn't validate correctly */
return tmp;
}
ALOGV("header validated correctly\n");
return header->size;
}
