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📄 file_decoder.c

📁 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.
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{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	decoder->private_->error_callback = value;
	return true;
}

FLAC_API FLAC__bool FLAC__file_decoder_set_client_data(FLAC__FileDecoder *decoder, void *value)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	decoder->private_->client_data = value;
	return true;
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_respond(FLAC__FileDecoder *decoder, FLAC__MetadataType type)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_respond(decoder->private_->seekable_stream_decoder, type);
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_respond_application(FLAC__FileDecoder *decoder, const FLAC__byte id[4])
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_respond_application(decoder->private_->seekable_stream_decoder, id);
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_respond_all(FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_respond_all(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_ignore(FLAC__FileDecoder *decoder, FLAC__MetadataType type)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_ignore(decoder->private_->seekable_stream_decoder, type);
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_ignore_application(FLAC__FileDecoder *decoder, const FLAC__byte id[4])
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_ignore_application(decoder->private_->seekable_stream_decoder, id);
}

FLAC_API FLAC__bool FLAC__file_decoder_set_metadata_ignore_all(FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	FLAC__ASSERT(0 != decoder->protected_);
	FLAC__ASSERT(0 != decoder->private_->seekable_stream_decoder);
	if(decoder->protected_->state != FLAC__FILE_DECODER_UNINITIALIZED)
		return false;
	return FLAC__seekable_stream_decoder_set_metadata_ignore_all(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__FileDecoderState FLAC__file_decoder_get_state(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->protected_);
	return decoder->protected_->state;
}

FLAC_API FLAC__SeekableStreamDecoderState FLAC__file_decoder_get_seekable_stream_decoder_state(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_state(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__StreamDecoderState FLAC__file_decoder_get_stream_decoder_state(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_stream_decoder_state(decoder->private_->seekable_stream_decoder);
}

FLAC_API const char *FLAC__file_decoder_get_resolved_state_string(const FLAC__FileDecoder *decoder)
{
	if(decoder->protected_->state != FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR)
		return FLAC__FileDecoderStateString[decoder->protected_->state];
	else
		return FLAC__seekable_stream_decoder_get_resolved_state_string(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__bool FLAC__file_decoder_get_md5_checking(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_md5_checking(decoder->private_->seekable_stream_decoder);
}

FLAC_API unsigned FLAC__file_decoder_get_channels(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_channels(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__ChannelAssignment FLAC__file_decoder_get_channel_assignment(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_channel_assignment(decoder->private_->seekable_stream_decoder);
}

FLAC_API unsigned FLAC__file_decoder_get_bits_per_sample(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_bits_per_sample(decoder->private_->seekable_stream_decoder);
}

FLAC_API unsigned FLAC__file_decoder_get_sample_rate(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_sample_rate(decoder->private_->seekable_stream_decoder);
}

FLAC_API unsigned FLAC__file_decoder_get_blocksize(const FLAC__FileDecoder *decoder)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_blocksize(decoder->private_->seekable_stream_decoder);
}

FLAC_API FLAC__bool FLAC__file_decoder_get_decode_position(const FLAC__FileDecoder *decoder, FLAC__uint64 *position)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(0 != decoder->private_);
	return FLAC__seekable_stream_decoder_get_decode_position(decoder->private_->seekable_stream_decoder, position);
}

FLAC_API FLAC__bool FLAC__file_decoder_process_single(FLAC__FileDecoder *decoder)
{
	FLAC__bool ret;
	FLAC__ASSERT(0 != decoder);

	if(decoder->private_->seekable_stream_decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
		decoder->protected_->state = FLAC__FILE_DECODER_END_OF_FILE;

	if(decoder->protected_->state == FLAC__FILE_DECODER_END_OF_FILE)
		return true;

	FLAC__ASSERT(decoder->protected_->state == FLAC__FILE_DECODER_OK);

	ret = FLAC__seekable_stream_decoder_process_single(decoder->private_->seekable_stream_decoder);
	if(!ret)
		decoder->protected_->state = FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR;

	return ret;
}

FLAC_API FLAC__bool FLAC__file_decoder_process_until_end_of_metadata(FLAC__FileDecoder *decoder)
{
	FLAC__bool ret;
	FLAC__ASSERT(0 != decoder);

	if(decoder->private_->seekable_stream_decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
		decoder->protected_->state = FLAC__FILE_DECODER_END_OF_FILE;

	if(decoder->protected_->state == FLAC__FILE_DECODER_END_OF_FILE)
		return true;

	FLAC__ASSERT(decoder->protected_->state == FLAC__FILE_DECODER_OK);

	ret = FLAC__seekable_stream_decoder_process_until_end_of_metadata(decoder->private_->seekable_stream_decoder);
	if(!ret)
		decoder->protected_->state = FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR;

	return ret;
}

FLAC_API FLAC__bool FLAC__file_decoder_process_until_end_of_file(FLAC__FileDecoder *decoder)
{
	FLAC__bool ret;
	FLAC__ASSERT(0 != decoder);

	if(decoder->private_->seekable_stream_decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
		decoder->protected_->state = FLAC__FILE_DECODER_END_OF_FILE;

	if(decoder->protected_->state == FLAC__FILE_DECODER_END_OF_FILE)
		return true;

	FLAC__ASSERT(decoder->protected_->state == FLAC__FILE_DECODER_OK);

	ret = FLAC__seekable_stream_decoder_process_until_end_of_stream(decoder->private_->seekable_stream_decoder);
	if(!ret)
		decoder->protected_->state = FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR;

	return ret;
}

FLAC_API FLAC__bool FLAC__file_decoder_skip_single_frame(FLAC__FileDecoder *decoder)
{
	FLAC__bool ret;
	FLAC__ASSERT(0 != decoder);

	if(decoder->private_->seekable_stream_decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
		decoder->protected_->state = FLAC__FILE_DECODER_END_OF_FILE;

	if(decoder->protected_->state == FLAC__FILE_DECODER_END_OF_FILE)
		return true;

	FLAC__ASSERT(decoder->protected_->state == FLAC__FILE_DECODER_OK);

	ret = FLAC__seekable_stream_decoder_skip_single_frame(decoder->private_->seekable_stream_decoder);
	if(!ret)
		decoder->protected_->state = FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR;

	return ret;
}

FLAC_API FLAC__bool FLAC__file_decoder_seek_absolute(FLAC__FileDecoder *decoder, FLAC__uint64 sample)
{
	FLAC__ASSERT(0 != decoder);
	FLAC__ASSERT(decoder->protected_->state == FLAC__FILE_DECODER_OK || decoder->protected_->state == FLAC__FILE_DECODER_END_OF_FILE);

	if(decoder->private_->filename == 0) { /* means the file is stdin... */
		decoder->protected_->state = FLAC__FILE_DECODER_SEEK_ERROR;
		return false;
	}

	if(!FLAC__seekable_stream_decoder_seek_absolute(decoder->private_->seekable_stream_decoder, sample)) {
		decoder->protected_->state = FLAC__FILE_DECODER_SEEK_ERROR;
		return false;
	}
	else {
		decoder->protected_->state = FLAC__FILE_DECODER_OK;
		return true;
	}
}
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