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📄 stream_encoder.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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			/* the above function sets the state for us in case of an error */
			return encoder->protected_->state;
		}
	}

	/*
	 * write the user's metadata blocks
	 */
	for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
		encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1);
		if(!FLAC__bitbuffer_clear(encoder->private_->frame))
			return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
		if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame))
			return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
		if(!write_bitbuffer_(encoder, 0)) {
			/* the above function sets the state for us in case of an error */
			return encoder->protected_->state;
		}
	}

	if(encoder->protected_->verify)
		encoder->private_->verify.state_hint = ENCODER_IN_AUDIO;

	return encoder->protected_->state;
}

FLAC_API void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);

	if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
		return;

	if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
		if(encoder->private_->current_sample_number != 0) {
			encoder->protected_->blocksize = encoder->private_->current_sample_number;
			process_frame_(encoder, true); /* true => is last frame */
		}
	}

	FLAC__MD5Final(encoder->private_->metadata.data.stream_info.md5sum, &encoder->private_->md5context);

	if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
		encoder->private_->metadata_callback(encoder, &encoder->private_->metadata, encoder->private_->client_data);
	}

	if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder)
		FLAC__stream_decoder_finish(encoder->private_->verify.decoder);

	free_(encoder);
	set_defaults_(encoder);

	encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
#ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
	encoder->protected_->verify = value;
#endif
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->streamable_subset = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->do_mid_side_stereo = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->loose_mid_side_stereo = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->channels = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->bits_per_sample = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->sample_rate = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->blocksize = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->max_lpc_order = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->qlp_coeff_precision = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->do_qlp_coeff_prec_search = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
#if 0
	/*@@@ deprecated: */
	encoder->protected_->do_escape_coding = value;
#else
	(void)value;
#endif
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->do_exhaustive_model_search = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->min_residual_partition_order = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->max_residual_partition_order = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
#if 0
	/*@@@ deprecated: */
	encoder->protected_->rice_parameter_search_dist = value;
#else
	(void)value;
#endif
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->total_samples_estimate = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->protected_->metadata = metadata;
	encoder->protected_->num_metadata_blocks = num_blocks;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_write_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteCallback value)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != value);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->write_callback = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderMetadataCallback value)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != value);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->metadata_callback = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_set_client_data(FLAC__StreamEncoder *encoder, void *value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->client_data = value;
	return true;
}

/*
 * These three functions are not static, but not publically exposed in
 * include/FLAC/ either.  They are used by the test suite.
 */
FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->disable_constant_subframes = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->disable_fixed_subframes = value;
	return true;
}

FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
		return false;
	encoder->private_->disable_verbatim_subframes = value;
	return true;
}

FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	return encoder->protected_->state;
}

FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	if(encoder->protected_->verify)
		return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder);
	else
		return FLAC__STREAM_DECODER_UNINITIALIZED;
}

FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder)
{
	if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR)
		return FLAC__StreamEncoderStateString[encoder->protected_->state];
	else
		return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder);
}
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