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add FLAC__metadata_simple_iterator_get_application_id()

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This commit is contained in:
Josh Coalson
2007-08-15 05:59:09 +00:00
parent 4b279f76a7
commit 4e56b06d63
5 changed files with 63 additions and 3 deletions
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2
doc/html/changelog.html
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@@ -121,6 +121,7 @@
<li><b>Added</b> FLAC__metadata_simple_iterator_is_last()</li>
<li><b>Added</b> FLAC__metadata_simple_iterator_get_block_offset()</li>
<li><b>Added</b> FLAC__metadata_simple_iterator_get_block_length()</li>
<li><b>Added</b> FLAC__metadata_simple_iterator_get_application_id()</li>
</ul>
</li>
<li>
@@ -129,6 +130,7 @@
<li><b>Added</b> FLAC::Metadata::SimpleIterator::is_last()</li>
<li><b>Added</b> FLAC::Metadata::SimpleIterator::get_block_offset()</li>
<li><b>Added</b> FLAC::Metadata::SimpleIterator::get_block_length()</li>
<li><b>Added</b> FLAC::Metadata::SimpleIterator::get_application_id()</li>
</ul>
</li>
</ul>

1
include/FLAC++/metadata.h
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@@ -1023,6 +1023,7 @@ namespace FLAC {
off_t get_block_offset() const; ///< See FLAC__metadata_simple_iterator_get_block_offset().
::FLAC__MetadataType get_block_type() const; ///< See FLAC__metadata_simple_iterator_get_block_type().
unsigned get_block_length() const; ///< See FLAC__metadata_simple_iterator_get_block_length().
bool get_application_id(FLAC__byte *id); ///< See FLAC__metadata_simple_iterator_get_application_id().
Prototype *get_block(); ///< See FLAC__metadata_simple_iterator_get_block().
bool set_block(Prototype *block, bool use_padding = true); ///< See FLAC__metadata_simple_iterator_set_block().
bool insert_block_after(Prototype *block, bool use_padding = true); ///< See FLAC__metadata_simple_iterator_insert_block_after().

29
include/FLAC/metadata.h
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@@ -472,7 +472,6 @@ FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_
* This is the byte offset relative to the beginning of the file of
* the current metadata block's header.
*/
FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator);
/** Get the type of the metadata block at the current position. This
@@ -487,7 +486,6 @@ FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metad
* \retval FLAC__MetadataType
* The type of the metadata block at the current iterator position.
*/
FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator);
/*@@@@add to tests*/
@@ -506,9 +504,34 @@ FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const
* <a href="http://flac.sourceforge.net/format.html#metadata_block_header">metadata block header</a>,
* i.e. the length of the metadata body that follows the header.
*/
FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator);
/*@@@@add to tests*/
/** Get the application ID of the \c APPLICATION block at the current
* position. This avoids reading the actual block data which can save
* time for large blocks.
*
* \param iterator A pointer to an existing initialized iterator.
* \param id A pointer to a buffer of at least \c 4 bytes where
* the ID will be stored.
* \assert
* \code iterator != NULL \endcode
* \code id != NULL \endcode
* \a iterator has been successfully initialized with
* FLAC__metadata_simple_iterator_init()
* \retval FLAC__bool
* \c true if the ID was successfully read, else \c false, in which
* case you should check FLAC__metadata_simple_iterator_status() to
* find out why. If the status is
* \c FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT, then the
* current metadata block is not an \c APPLICATION block. Otherwise
* if the status is
* \c FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR or
* \c FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR, an I/O error
* occurred and the iterator can no longer be used.
*/
FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id);
/** Get the metadata block at the current position. You can modify the
* block but must use FLAC__metadata_simple_iterator_set_block() to
* write it back to the FLAC file.

7
src/libFLAC++/metadata.cpp
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@@ -1363,6 +1363,13 @@ namespace FLAC {
return ::FLAC__metadata_simple_iterator_get_block_length(iterator_);
}
//@@@@ add to tests
bool SimpleIterator::get_application_id(FLAC__byte *id)
{
FLAC__ASSERT(is_valid());
return (bool)::FLAC__metadata_simple_iterator_get_application_id(iterator_, id);
}
Prototype *SimpleIterator::get_block()
{
FLAC__ASSERT(is_valid());

27
src/libFLAC/metadata_iterators.c
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@@ -609,6 +609,33 @@ FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Me
return iterator->length;
}
FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
{
const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
FLAC__ASSERT(0 != iterator);
FLAC__ASSERT(0 != iterator->file);
FLAC__ASSERT(0 != id);
if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
return false;
}
if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
return false;
}
/* back up */
if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
return false;
}
return true;
}
FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
{
FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);