metadata.cpp

这是著名的TCPMP播放器在WINDWOWS,和WINCE下编译通过的源程序.笔者对其中的LIBMAD库做了针对ARM MPU的优化. 并增加了词幕功能.

		FLAC__uint64 CueSheet::get_lead_in() const
		{
			FLAC__ASSERT(is_valid());
			return object_->data.cue_sheet.lead_in;
		}

		bool CueSheet::get_is_cd() const
		{
			FLAC__ASSERT(is_valid());
			return object_->data.cue_sheet.is_cd? true : false;
		}

		unsigned CueSheet::get_num_tracks() const
		{
			FLAC__ASSERT(is_valid());
			return object_->data.cue_sheet.num_tracks;
		}

		CueSheet::Track CueSheet::get_track(unsigned i) const
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
			return Track(object_->data.cue_sheet.tracks + i);
		}

		void CueSheet::set_media_catalog_number(const char value[128])
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(0 != value);
			memcpy(object_->data.cue_sheet.media_catalog_number, value, 128);
			object_->data.cue_sheet.media_catalog_number[128] = '\0';
		}

		void CueSheet::set_lead_in(FLAC__uint64 value)
		{
			FLAC__ASSERT(is_valid());
			object_->data.cue_sheet.lead_in = value;
		}

		void CueSheet::set_is_cd(bool value)
		{
			FLAC__ASSERT(is_valid());
			object_->data.cue_sheet.is_cd = value;
		}

		void CueSheet::set_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
			FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
			object_->data.cue_sheet.tracks[track_num].indices[index_num] = index;
		}

		bool CueSheet::insert_index(unsigned track_num, unsigned index_num, const ::FLAC__StreamMetadata_CueSheet_Index &index)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
			FLAC__ASSERT(index_num <= object_->data.cue_sheet.tracks[track_num].num_indices);
			return (bool)::FLAC__metadata_object_cuesheet_track_insert_index(object_, track_num, index_num, index);
		}

		bool CueSheet::delete_index(unsigned track_num, unsigned index_num)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(track_num < object_->data.cue_sheet.num_tracks);
			FLAC__ASSERT(index_num < object_->data.cue_sheet.tracks[track_num].num_indices);
			return (bool)::FLAC__metadata_object_cuesheet_track_delete_index(object_, track_num, index_num);
		}

		bool CueSheet::set_track(unsigned i, const CueSheet::Track &track)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
			// We can safely const_cast since copy=true
			return (bool)::FLAC__metadata_object_cuesheet_set_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
		}

		bool CueSheet::insert_track(unsigned i, const CueSheet::Track &track)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(i <= object_->data.cue_sheet.num_tracks);
			// We can safely const_cast since copy=true
			return (bool)::FLAC__metadata_object_cuesheet_insert_track(object_, i, const_cast< ::FLAC__StreamMetadata_CueSheet_Track*>(track.get_track()), /*copy=*/true);
		}

		bool CueSheet::delete_track(unsigned i)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(i < object_->data.cue_sheet.num_tracks);
			return (bool)::FLAC__metadata_object_cuesheet_delete_track(object_, i);
		}

		bool CueSheet::is_legal(bool check_cd_da_subset, const char **violation) const
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_object_cuesheet_is_legal(object_, check_cd_da_subset, violation);
		}


		//
		// Unknown
		//

		Unknown::Unknown():
		Prototype(FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION), /*copy=*/false)
		{ }

		Unknown::~Unknown()
		{ }

		const FLAC__byte *Unknown::get_data() const
		{
			FLAC__ASSERT(is_valid());
			return object_->data.application.data;
		}

		bool Unknown::set_data(const FLAC__byte *data, unsigned length)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_object_application_set_data(object_, (FLAC__byte*)data, length, true);
		}

		bool Unknown::set_data(FLAC__byte *data, unsigned length, bool copy)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_object_application_set_data(object_, data, length, copy);
		}


		// ============================================================
		//
		//  Level 0
		//
		// ============================================================

		FLACPP_API bool get_streaminfo(const char *filename, StreamInfo &streaminfo)
		{
			FLAC__ASSERT(0 != filename);

			::FLAC__StreamMetadata object;

			if(::FLAC__metadata_get_streaminfo(filename, &object)) {
				streaminfo = object;
				return true;
			}
			else
				return false;
		}

		FLACPP_API bool get_tags(const char *filename, VorbisComment *&tags)
		{
			FLAC__ASSERT(0 != filename);

			::FLAC__StreamMetadata *object;

			tags = 0;

			if(::FLAC__metadata_get_tags(filename, &object)) {
				tags = new VorbisComment(object, /*copy=*/false);
				return true;
			}
			else
				return false;
		}

		FLACPP_API bool get_tags(const char *filename, VorbisComment &tags)
		{
			FLAC__ASSERT(0 != filename);

			::FLAC__StreamMetadata *object;

			if(::FLAC__metadata_get_tags(filename, &object)) {
				tags.assign(object, /*copy=*/false);
				return true;
			}
			else
				return false;
		}


		// ============================================================
		//
		//  Level 1
		//
		// ============================================================

		SimpleIterator::SimpleIterator():
		iterator_(::FLAC__metadata_simple_iterator_new())
		{ }

		SimpleIterator::~SimpleIterator()
		{
			clear();
		}

		void SimpleIterator::clear()
		{
			if(0 != iterator_)
				FLAC__metadata_simple_iterator_delete(iterator_);
			iterator_ = 0;
		}

		bool SimpleIterator::init(const char *filename, bool read_only, bool preserve_file_stats)
		{
			FLAC__ASSERT(0 != filename);
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_init(iterator_, filename, read_only, preserve_file_stats);
		}

		bool SimpleIterator::is_valid() const
		{
			return 0 != iterator_;
		}

		SimpleIterator::Status SimpleIterator::status()
		{
			FLAC__ASSERT(is_valid());
			return Status(::FLAC__metadata_simple_iterator_status(iterator_));
		}

		bool SimpleIterator::is_writable() const
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_is_writable(iterator_);
		}

		bool SimpleIterator::next()
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_next(iterator_);
		}

		bool SimpleIterator::prev()
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_prev(iterator_);
		}

		::FLAC__MetadataType SimpleIterator::get_block_type() const
		{
			FLAC__ASSERT(is_valid());
			return ::FLAC__metadata_simple_iterator_get_block_type(iterator_);
		}

		Prototype *SimpleIterator::get_block()
		{
			FLAC__ASSERT(is_valid());
			return local::construct_block(::FLAC__metadata_simple_iterator_get_block(iterator_));
		}

		bool SimpleIterator::set_block(Prototype *block, bool use_padding)
		{
			FLAC__ASSERT(0 != block);
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_set_block(iterator_, block->object_, use_padding);
		}

		bool SimpleIterator::insert_block_after(Prototype *block, bool use_padding)
		{
			FLAC__ASSERT(0 != block);
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_insert_block_after(iterator_, block->object_, use_padding);
		}

		bool SimpleIterator::delete_block(bool use_padding)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_simple_iterator_delete_block(iterator_, use_padding);
		}


		// ============================================================
		//
		//  Level 2
		//
		// ============================================================

		Chain::Chain():
		chain_(::FLAC__metadata_chain_new())
		{ }

		Chain::~Chain()
		{
			clear();
		}

		void Chain::clear()
		{
			if(0 != chain_)
				FLAC__metadata_chain_delete(chain_);
			chain_ = 0;
		}

		bool Chain::is_valid() const
		{
			return 0 != chain_;
		}

		Chain::Status Chain::status()
		{
			FLAC__ASSERT(is_valid());
			return Status(::FLAC__metadata_chain_status(chain_));
		}

		bool Chain::read(const char *filename)
		{
			FLAC__ASSERT(0 != filename);
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_read(chain_, filename);
		}

		bool Chain::read(FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_read_with_callbacks(chain_, handle, callbacks);
		}

		bool Chain::check_if_tempfile_needed(bool use_padding)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_check_if_tempfile_needed(chain_, use_padding);
		}

		bool Chain::write(bool use_padding, bool preserve_file_stats)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_write(chain_, use_padding, preserve_file_stats);
		}

		bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_write_with_callbacks(chain_, use_padding, handle, callbacks);
		}

		bool Chain::write(bool use_padding, ::FLAC__IOHandle handle, ::FLAC__IOCallbacks callbacks, ::FLAC__IOHandle temp_handle, ::FLAC__IOCallbacks temp_callbacks)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain_, use_padding, handle, callbacks, temp_handle, temp_callbacks);
		}

		void Chain::merge_padding()
		{
			FLAC__ASSERT(is_valid());
			::FLAC__metadata_chain_merge_padding(chain_);
		}

		void Chain::sort_padding()
		{
			FLAC__ASSERT(is_valid());
			::FLAC__metadata_chain_sort_padding(chain_);
		}


		Iterator::Iterator():
		iterator_(::FLAC__metadata_iterator_new())
		{ }

		Iterator::~Iterator()
		{
			clear();
		}

		void Iterator::clear()
		{
			if(0 != iterator_)
				FLAC__metadata_iterator_delete(iterator_);
			iterator_ = 0;
		}

		bool Iterator::is_valid() const
		{
			return 0 != iterator_;
		}

		void Iterator::init(Chain &chain)
		{
			FLAC__ASSERT(is_valid());
			FLAC__ASSERT(chain.is_valid());
			::FLAC__metadata_iterator_init(iterator_, chain.chain_);
		}

		bool Iterator::next()
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_iterator_next(iterator_);
		}

		bool Iterator::prev()
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_iterator_prev(iterator_);
		}

		::FLAC__MetadataType Iterator::get_block_type() const
		{
			FLAC__ASSERT(is_valid());
			return ::FLAC__metadata_iterator_get_block_type(iterator_);
		}

		Prototype *Iterator::get_block()
		{
			FLAC__ASSERT(is_valid());
			Prototype *block = local::construct_block(::FLAC__metadata_iterator_get_block(iterator_));
			if(0 != block)
				block->set_reference(true);
			return block;
		}

		bool Iterator::set_block(Prototype *block)
		{
			FLAC__ASSERT(0 != block);
			FLAC__ASSERT(is_valid());
			bool ret = (bool)::FLAC__metadata_iterator_set_block(iterator_, block->object_);
			if(ret) {
				block->set_reference(true);
				delete block;
			}
			return ret;
		}

		bool Iterator::delete_block(bool replace_with_padding)
		{
			FLAC__ASSERT(is_valid());
			return (bool)::FLAC__metadata_iterator_delete_block(iterator_, replace_with_padding);
		}

		bool Iterator::insert_block_before(Prototype *block)
		{
			FLAC__ASSERT(0 != block);
			FLAC__ASSERT(is_valid());
			bool ret = (bool)::FLAC__metadata_iterator_insert_block_before(iterator_, block->object_);
			if(ret) {
				block->set_reference(true);
				delete block;
			}
			return ret;
		}

		bool Iterator::insert_block_after(Prototype *block)
		{
			FLAC__ASSERT(0 != block);
			FLAC__ASSERT(is_valid());
			bool ret = (bool)::FLAC__metadata_iterator_insert_block_after(iterator_, block->object_);
			if(ret) {
				block->set_reference(true);
				delete block;
			}
			return ret;
		}

	}
}