file_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.

	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_stream_encoder_state(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__StreamDecoderState FLAC__file_encoder_get_verify_decoder_state(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_verify_decoder_state(encoder->private_->seekable_stream_encoder);
}

FLAC_API const char *FLAC__file_encoder_get_resolved_state_string(const FLAC__FileEncoder *encoder)
{
	if(encoder->protected_->state != FLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR)
		return FLAC__FileEncoderStateString[encoder->protected_->state];
	else
		return FLAC__seekable_stream_encoder_get_resolved_state_string(encoder->private_->seekable_stream_encoder);
}

FLAC_API void FLAC__file_encoder_get_verify_decoder_error_stats(const FLAC__FileEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	FLAC__seekable_stream_encoder_get_verify_decoder_error_stats(encoder->private_->seekable_stream_encoder, absolute_sample, frame_number, channel, sample, expected, got);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_verify(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_verify(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_streamable_subset(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_streamable_subset(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_do_mid_side_stereo(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_do_mid_side_stereo(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_loose_mid_side_stereo(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_loose_mid_side_stereo(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_channels(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_channels(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_bits_per_sample(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_bits_per_sample(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_sample_rate(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_sample_rate(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_blocksize(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_blocksize(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_max_lpc_order(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_max_lpc_order(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_qlp_coeff_precision(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_qlp_coeff_precision(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_do_qlp_coeff_prec_search(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_do_qlp_coeff_prec_search(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_do_escape_coding(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_do_escape_coding(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_get_do_exhaustive_model_search(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_do_exhaustive_model_search(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_min_residual_partition_order(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_min_residual_partition_order(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_max_residual_partition_order(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_max_residual_partition_order(encoder->private_->seekable_stream_encoder);
}

FLAC_API unsigned FLAC__file_encoder_get_rice_parameter_search_dist(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_rice_parameter_search_dist(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__uint64 FLAC__file_encoder_get_total_samples_estimate(const FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return FLAC__seekable_stream_encoder_get_total_samples_estimate(encoder->private_->seekable_stream_encoder);
}

FLAC_API FLAC__bool FLAC__file_encoder_process(FLAC__FileEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	if(!FLAC__seekable_stream_encoder_process(encoder->private_->seekable_stream_encoder, buffer, samples)) {
		encoder->protected_->state = FLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR;
		return false;
	}
	else
		return true;
}

/* 'samples' is channel-wide samples, e.g. for 1 second at 44100Hz, 'samples' = 44100 regardless of the number of channels */
FLAC_API FLAC__bool FLAC__file_encoder_process_interleaved(FLAC__FileEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	if(!FLAC__seekable_stream_encoder_process_interleaved(encoder->private_->seekable_stream_encoder, buffer, samples)) {
		encoder->protected_->state = FLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR;
		return false;
	}
	else
		return true;
}


/***********************************************************************
 *
 * Private class methods
 *
 ***********************************************************************/

void set_defaults_(FLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);

	encoder->private_->progress_callback = 0;
	encoder->private_->client_data = 0;
	encoder->private_->total_frames_estimate = 0;
	encoder->private_->filename = 0;
}

FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data)
{
	FLAC__FileEncoder *file_encoder = (FLAC__FileEncoder*)client_data;

	(void)encoder;

	FLAC__ASSERT(0 != file_encoder);

	if(fseek(file_encoder->private_->file, (long)absolute_byte_offset, SEEK_SET) < 0)
		return FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_ERROR;
	else
		return FLAC__SEEKABLE_STREAM_ENCODER_SEEK_STATUS_OK;
}

FLAC__SeekableStreamEncoderTellStatus tell_callback_(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
	FLAC__FileEncoder *file_encoder = (FLAC__FileEncoder*)client_data;
	long offset;

	(void)encoder;

	FLAC__ASSERT(0 != file_encoder);

	offset = ftell(file_encoder->private_->file);

	if(offset < 0) {
		return FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_ERROR;
	}
	else {
		*absolute_byte_offset = (FLAC__uint64)offset;
		return FLAC__SEEKABLE_STREAM_ENCODER_TELL_STATUS_OK;
	}
}

#ifdef FLAC__VALGRIND_TESTING
static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
{
	size_t ret = fwrite(ptr, size, nmemb, stream);
	if(!ferror(stream))
		fflush(stream);
	return ret;
}
#else
#define local__fwrite fwrite
#endif

FLAC__StreamEncoderWriteStatus write_callback_(const FLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
{
	FLAC__FileEncoder *file_encoder = (FLAC__FileEncoder*)client_data;

	(void)encoder, (void)samples, (void)current_frame;

	FLAC__ASSERT(0 != file_encoder);

	if(local__fwrite(buffer, sizeof(FLAC__byte), bytes, file_encoder->private_->file) == bytes) {
		file_encoder->private_->bytes_written += bytes;
		file_encoder->private_->samples_written += samples;
		/* we keep a high watermark on the number of frames written because
		 * when the encoder goes back to write metadata, 'current_frame'
		 * will drop back to 0.
		 */
		file_encoder->private_->frames_written = max(file_encoder->private_->frames_written, current_frame+1);
		if(0 != file_encoder->private_->progress_callback && samples > 0)
			file_encoder->private_->progress_callback(file_encoder, file_encoder->private_->bytes_written, file_encoder->private_->samples_written, file_encoder->private_->frames_written, file_encoder->private_->total_frames_estimate, file_encoder->private_->client_data);
		return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
	}
	else
		return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
}