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.

OggFLAC_API const char *OggFLAC__file_encoder_get_resolved_state_string(const OggFLAC__FileEncoder *encoder)
{
	if(encoder->protected_->state != OggFLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR)
		return OggFLAC__FileEncoderStateString[encoder->protected_->state];
	else
		return OggFLAC__seekable_stream_encoder_get_resolved_state_string(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API void OggFLAC__file_encoder_get_verify_decoder_error_stats(const OggFLAC__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_);
	OggFLAC__seekable_stream_encoder_get_verify_decoder_error_stats(encoder->private_->seekable_stream_encoder, absolute_sample, frame_number, channel, sample, expected, got);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_verify(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_verify(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_streamable_subset(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_streamable_subset(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_do_mid_side_stereo(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_do_mid_side_stereo(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_loose_mid_side_stereo(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_loose_mid_side_stereo(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_channels(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_channels(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_bits_per_sample(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_bits_per_sample(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_sample_rate(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_sample_rate(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_blocksize(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_blocksize(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_max_lpc_order(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_max_lpc_order(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_qlp_coeff_precision(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_qlp_coeff_precision(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_do_qlp_coeff_prec_search(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_do_qlp_coeff_prec_search(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_do_escape_coding(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_do_escape_coding(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_get_do_exhaustive_model_search(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_do_exhaustive_model_search(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_min_residual_partition_order(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_min_residual_partition_order(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_max_residual_partition_order(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_max_residual_partition_order(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API unsigned OggFLAC__file_encoder_get_rice_parameter_search_dist(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_rice_parameter_search_dist(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__uint64 OggFLAC__file_encoder_get_total_samples_estimate(const OggFLAC__FileEncoder *encoder)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	return OggFLAC__seekable_stream_encoder_get_total_samples_estimate(encoder->private_->seekable_stream_encoder);
}

OggFLAC_API FLAC__bool OggFLAC__file_encoder_process(OggFLAC__FileEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	if(!OggFLAC__seekable_stream_encoder_process(encoder->private_->seekable_stream_encoder, buffer, samples)) {
		encoder->protected_->state = OggFLAC__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 */
OggFLAC_API FLAC__bool OggFLAC__file_encoder_process_interleaved(OggFLAC__FileEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
{
	FLAC__ASSERT(0 != encoder);
	FLAC__ASSERT(0 != encoder->private_);
	if(!OggFLAC__seekable_stream_encoder_process_interleaved(encoder->private_->seekable_stream_encoder, buffer, samples)) {
		encoder->protected_->state = OggFLAC__FILE_ENCODER_SEEKABLE_STREAM_ENCODER_ERROR;
		return false;
	}
	else
		return true;
}


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

void set_defaults_(OggFLAC__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;
}

OggFLAC__SeekableStreamEncoderReadStatus read_callback_(const OggFLAC__SeekableStreamEncoder *encoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
{
	OggFLAC__FileEncoder *file_encoder = (OggFLAC__FileEncoder*)client_data;

	(void)encoder;

	FLAC__ASSERT(0 != file_encoder);

	*bytes = (unsigned)fread(buffer, 1, *bytes, file_encoder->private_->file);
	if (*bytes == 0) {
		if (feof(file_encoder->private_->file))
			return OggFLAC__SEEKABLE_STREAM_ENCODER_READ_STATUS_END_OF_STREAM;
		else if (ferror(file_encoder->private_->file))
			return OggFLAC__SEEKABLE_STREAM_ENCODER_READ_STATUS_ABORT;
	}
	return OggFLAC__SEEKABLE_STREAM_ENCODER_READ_STATUS_CONTINUE;
}

FLAC__SeekableStreamEncoderSeekStatus seek_callback_(const OggFLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data)
{
	OggFLAC__FileEncoder *file_encoder = (OggFLAC__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 OggFLAC__SeekableStreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
{
	OggFLAC__FileEncoder *file_encoder = (OggFLAC__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 OggFLAC__SeekableStreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
{
	OggFLAC__FileEncoder *file_encoder = (OggFLAC__FileEncoder*)client_data;

	(void)encoder;

	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);
		/*@@@ We would like to add an '&& samples > 0' to the if
		 * clause here but currently because of the nature of our Ogg
		 * writing implementation, 'samples' is always 0 (see
		 * ogg_encoder_aspect.c).  The downside is extra progress
		 * callbacks.
		 */
		if(0 != file_encoder->private_->progress_callback)
			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;
}