metadata_manip.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.

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]PP\tset APPLICATION (grow), expand into padding which is exactly consumed\n");
	if(!app->set_data(data, 91, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	delete_from_our_metadata_(our_current_position+1);
	if(!iterator.set_block(app, true))
		return die_ss_("iterator.set_block(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]P\tset APPLICATION (grow), expand into padding which is exactly consumed\n");
	if(!app->set_data(data, 100, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	delete_from_our_metadata_(our_current_position+1);
	our_metadata_.blocks[our_current_position]->set_is_last(true);
	if(!iterator.set_block(app, true))
		return die_ss_("iterator.set_block(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tset PADDING (equal size)\n");
	padding->set_length(app->get_length());
	if(!replace_in_our_metadata_(padding, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(padding, true))
		return die_ss_("iterator.set_block(padding, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[P]\tinsert PADDING after\n");
	if(!iterator.insert_block_after(padding, false))
		return die_ss_("iterator.insert_block_after(padding, false)", iterator);
	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
		return false;

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SVP[P]\tinsert PADDING after\n");
	padding->set_length(5);
	if(!iterator.insert_block_after(padding, false))
		return die_ss_("iterator.insert_block_after(padding, false)", iterator);
	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
		return false;

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SVPP[P]\tprev\n");
	if(!iterator.prev())
		return die_("iterator ended early\n");
	our_current_position--;

	printf("SVP[P]P\tprev\n");
	if(!iterator.prev())
		return die_("iterator ended early\n");
	our_current_position--;

	printf("SV[P]PP\tprev\n");
	if(!iterator.prev())
		return die_("iterator ended early\n");
	our_current_position--;

	printf("S[V]PPP\tinsert APPLICATION after, try to expand into padding which is too small\n");
	if(!app->set_data(data, 101, true))
		return die_("setting APPLICATION data");
	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.insert_block_after(app, true))
		return die_ss_("iterator.insert_block_after(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]PPP\tdelete (middle block), don't replace with padding\n");
	if(!iterator.delete_block(false))
		return die_ss_("iterator.delete_block(false)", iterator);
	delete_from_our_metadata_(our_current_position--);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("S[V]PPP\tinsert APPLICATION after, try to expand into padding which is 'close' but still too small\n");
	if(!app->set_data(data, 97, true))
		return die_("setting APPLICATION data");
	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.insert_block_after(app, true))
		return die_ss_("iterator.insert_block_after(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]PPP\tdelete (middle block), don't replace with padding\n");
	if(!iterator.delete_block(false))
		return die_ss_("iterator.delete_block(false)", iterator);
	delete_from_our_metadata_(our_current_position--);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("S[V]PPP\tinsert APPLICATION after, expand into padding which is exactly consumed\n");
	if(!app->set_data(data, 100, true))
		return die_("setting APPLICATION data");
	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
		return die_("copying object");
	delete_from_our_metadata_(our_current_position+1);
	if(!iterator.insert_block_after(app, true))
		return die_ss_("iterator.insert_block_after(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]PP\tdelete (middle block), don't replace with padding\n");
	if(!iterator.delete_block(false))
		return die_ss_("iterator.delete_block(false)", iterator);
	delete_from_our_metadata_(our_current_position--);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("S[V]PP\tinsert APPLICATION after, expand into padding which will leave 0-length pad\n");
	if(!app->set_data(data, 96, true))
		return die_("setting APPLICATION data");
	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
		return die_("copying object");
	dynamic_cast<FLAC::Metadata::Padding *>(our_metadata_.blocks[our_current_position+1])->set_length(0);
	if(!iterator.insert_block_after(app, true))
		return die_ss_("iterator.insert_block_after(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]PP\tdelete (middle block), don't replace with padding\n");
	if(!iterator.delete_block(false))
		return die_ss_("iterator.delete_block(false)", iterator);
	delete_from_our_metadata_(our_current_position--);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("S[V]PP\tnext\n");
	if(!iterator.next())
		return die_("iterator ended early\n");
	our_current_position++;

	printf("SV[P]P\tdelete (middle block), don't replace with padding\n");
	if(!iterator.delete_block(false))
		return die_ss_("iterator.delete_block(false)", iterator);
	delete_from_our_metadata_(our_current_position--);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("S[V]P\tinsert APPLICATION after, expand into padding which is exactly consumed\n");
	if(!app->set_data(data, 1, true))
		return die_("setting APPLICATION data");
	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
		return die_("copying object");
	delete_from_our_metadata_(our_current_position+1);
	if(!iterator.insert_block_after(app, true))
		return die_ss_("iterator.insert_block_after(app, true)", iterator);

	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;
	}

	delete app;
	delete padding;

	if(!remove_file_(flacfile_))
		return false;

	return true;
}

static bool test_level_2_(bool filename_based)
{
	FLAC::Metadata::Prototype *block;
	FLAC::Metadata::StreamInfo *streaminfo;
	FLAC::Metadata::Application *app;
	FLAC::Metadata::Padding *padding;
	FLAC__byte data[2000];
	unsigned our_current_position;

	// initialize 'data' to avoid Valgrind errors
	memset(data, 0, sizeof(data));

	printf("\n\n++++++ testing level 2 interface (%s-based)\n", filename_based? "filename":"callback");

	printf("generate read-only file\n");

	if(!generate_file_())
		return false;

	if(!change_stats_(flacfile_, /*read_only=*/true))
		return false;

	printf("create chain\n");
	FLAC::Metadata::Chain chain;
	if(!chain.is_valid())
		return die_("allocating memory for chain");

	printf("read chain\n");

	if(!read_chain_(chain, flacfile_, filename_based))
		return die_c_("reading chain", chain.status());

	printf("[S]VP\ttest initial metadata\n");

	if(!compare_chain_(chain, 0, 0))
		return false;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("switch file to read-write\n");

	if(!change_stats_(flacfile_, /*read-only=*/false))
		return false;

	printf("create iterator\n");
	{
	FLAC::Metadata::Iterator iterator;
	if(!iterator.is_valid())
		return die_("allocating memory for iterator");

	our_current_position = 0;

	iterator.init(chain);

	if(0 == (block = iterator.get_block()))
		return die_("getting block from iterator");

	FLAC__ASSERT(block->get_type() == FLAC__METADATA_TYPE_STREAMINFO);

	printf("[S]VP\tmodify STREAMINFO, write\n");

	streaminfo = dynamic_cast<FLAC::Metadata::StreamInfo *>(block);
	FLAC__ASSERT(0 != streaminfo);
	streaminfo->set_sample_rate(32000);
	if(!replace_in_our_metadata_(block, our_current_position, /*copy=*/true))
		return die_("copying object");
	delete block;

	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/true, filename_based, flacfile_))
		return die_c_("during chain.write(false, true)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("[S]VP\tnext\n");
	if(!iterator.next())
		return die_("iterator ended early\n");
	our_current_position++;

	printf("S[V]P\tnext\n");
	if(!iterator.next())
		return die_("iterator ended early\n");
	our_current_position++;

	printf("SV[P]\treplace PADDING with identical-size APPLICATION\n");
	if(0 == (block = iterator.get_block()))
		return die_("getting block from iterator");
	if(0 == (app = new FLAC::Metadata::Application()))
		return die_("new FLAC::Metadata::Application()");
	app->set_id((const unsigned char *)"duh");
	if(!app->set_data(data, block->get_length()-(FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), true))
		return die_("setting APPLICATION data");
	delete block;
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(app))
		return die_c_("iterator.set_block(app)", chain.status());

	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfile_))
		return die_c_("during chain.write(false, false)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tshrink APPLICATION, don't use padding\n");
	if(0 == (app = dynamic_cast<FLAC::Metadata::Application *>(FLAC::Metadata::clone(our_metadata_.blocks[our_current_position]))))
		return die_("copying object");
	if(!app->set_data(data, 26, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(app))
		return die_c_("iterator.set_block(app)", chain.status());

	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfile_))
		return die_c_("during chain.write(false, false)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tgrow APPLICATION, don't use padding\n");
	if(0 == (app = dynamic_cast<FLAC::Metadata::Application *>(FLAC::Metadata::clone(our_metadata_.blocks[our_current_position]))))
		return die_("copying object");
	if(!app->set_data(data, 28, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(app))
		return die_c_("iterator.set_block(app)", chain.status());

	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfile_))
		return die_c_("during chain.write(false, false)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tgrow APPLICATION, use padding, but last block is not padding\n");
	if(0 == (app = dynamic_cast<FLAC::Metadata::Application *>(FLAC::Metadata::clone(our_metadata_.blocks[our_current_position]))))
		return die_("copying object");
	if(!app->set_data(data, 36, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(app))
		return die_c_("iterator.set_block(app)", chain.status());

	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfile_))
		return die_c_("during chain.write(false, false)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tshrink APPLICATION, use padding, last block is not padding, but delta is too small for new PADDING block\n");
	if(0 == (app = dynamic_cast<FLAC::Metadata::Application *>(FLAC::Metadata::clone(our_metadata_.blocks[our_current_position]))))
		return die_("copying object");
	if(!app->set_data(data, 33, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
		return die_("copying object");
	if(!iterator.set_block(app))
		return die_c_("iterator.set_block(app)", chain.status());

	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfile_))
		return die_c_("during chain.write(true, false)", chain.status());
	block = iterator.get_block();
	if(!compare_chain_(chain, our_current_position, block))
		return false;
	delete block;
	if(!test_file_(flacfile_, /*ignore_metadata=*/false))
		return false;

	printf("SV[A]\tshrink APPLICATION, use padding, last block is not padding, delta is enough for new PADDING block\n");
	if(0 == (padding = new FLAC::Metadata::Padding()))
		return die_("creating PADDING block");
	if(0 == (app = dynamic_cast<FLAC::Metadata::Application *>(FLAC::Metadata::clone(our_metadata_.blocks[our_current_position]))))
		return die_("copying object");
	if(!app->set_data(data, 29, true))
		return die_("setting APPLICATION data");
	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))