flac: moved code from flacWrite() to _flac_common.c

There is still a lot of duplicated code in flac_plugin.c and
oggflac_plugin.c.  Move code from flac_plugin.c to _flac_common.c, and
use the new function flac_common_write() also in oggflac_plugin.c,
porting lots of optimizations over to it.

4 files changed, 97 insertions, 129 deletions

diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c
index e0c251489..5a98e63bc 100644
--- a/src/inputPlugins/_flac_common.c
+++ b/src/inputPlugins/_flac_common.c
@@ -196,4 +196,95 @@ void flac_error_common_cb(const char *plugin,
 	}
 }
 
+/* keep this inlined, this is just macro but prettier :) */
+static inline int flacSendChunk(FlacData * data)
+{
+	if (decoder_data(data->decoder, data->inStream,
+			 1, data->chunk,
+			 data->chunk_length, data->time,
+			 data->bitRate,
+			 data->replayGainInfo) == DECODE_COMMAND_STOP)
+		return -1;
+
+	return 0;
+}
+
+static void flac_convert_stereo16(unsigned char *dest,
+				  const FLAC__int32 * const buf[],
+				  unsigned int position, unsigned int end)
+{
+	for (; position < end; ++position) {
+		*(uint16_t*)dest = buf[0][position];
+		dest += 2;
+		*(uint16_t*)dest = buf[1][position];
+		dest += 2;
+	}
+}
+
+static void flac_convert(unsigned char *dest,
+			 unsigned int num_channels,
+			 unsigned int bytes_per_sample,
+			 const FLAC__int32 * const buf[],
+			 unsigned int position, unsigned int end)
+{
+	unsigned int c_chan, i;
+	FLAC__uint16 u16;
+	unsigned char *uc;
+
+	for (; position < end; ++position) {
+		for (c_chan = 0; c_chan < num_channels; c_chan++) {
+			u16 = buf[c_chan][position];
+			uc = (unsigned char *)&u16;
+			for (i = 0; i < bytes_per_sample; i++) {
+				*dest++ = *uc++;
+			}
+		}
+	}
+}
+
+FLAC__StreamDecoderWriteStatus
+flac_common_write(FlacData *data, const FLAC__Frame * frame,
+		  const FLAC__int32 *const buf[])
+{
+	unsigned int c_samp;
+	const unsigned int num_channels = frame->header.channels;
+	const unsigned int bytes_per_sample =
+		audio_format_sample_size(&data->audio_format);
+	const unsigned int bytes_per_channel =
+		bytes_per_sample * frame->header.channels;
+	const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
+	unsigned int num_samples;
+
+	assert(data->audio_format.bits > 0);
+
+	for (c_samp = 0; c_samp < frame->header.blocksize;
+	     c_samp += num_samples) {
+		num_samples = frame->header.blocksize - c_samp;
+		if (num_samples > max_samples)
+			num_samples = max_samples;
+
+		if (num_channels == 2 && bytes_per_sample == 2)
+			flac_convert_stereo16(data->chunk,
+					      buf, c_samp,
+					      c_samp + num_samples);
+		else
+			flac_convert(data->chunk,
+				     num_channels, bytes_per_sample, buf,
+				     c_samp, c_samp + num_samples);
+		data->chunk_length = num_samples * bytes_per_channel;
+
+		if (flacSendChunk(data) < 0) {
+			return
+				FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+		}
+		data->chunk_length = 0;
+		if (decoder_get_command(data->decoder) == DECODE_COMMAND_SEEK) {
+			return
+				FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+		}
+	}
+
+	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+}
+
 #endif /* HAVE_FLAC || HAVE_OGGFLAC */
diff --git a/src/inputPlugins/_flac_common.h b/src/inputPlugins/_flac_common.h
index a758a7369..4ca97cae0 100644
--- a/src/inputPlugins/_flac_common.h
+++ b/src/inputPlugins/_flac_common.h
@@ -164,18 +164,9 @@ void flac_error_common_cb(const char *plugin,
 struct tag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
 					   struct tag *tag);
 
-/* keep this inlined, this is just macro but prettier :) */
-static inline int flacSendChunk(FlacData * data)
-{
-	if (decoder_data(data->decoder, data->inStream,
-			 1, data->chunk,
-			 data->chunk_length, data->time,
-			 data->bitRate,
-			 data->replayGainInfo) == DECODE_COMMAND_STOP)
-		return -1;
-
-	return 0;
-}
+FLAC__StreamDecoderWriteStatus
+flac_common_write(FlacData *data, const FLAC__Frame * frame,
+		  const FLAC__int32 *const buf[]);
 
 #endif /* HAVE_FLAC || HAVE_OGGFLAC */
 
diff --git a/src/inputPlugins/flac_plugin.c b/src/inputPlugins/flac_plugin.c
index efa3e8355..fb518871a 100644
--- a/src/inputPlugins/flac_plugin.c
+++ b/src/inputPlugins/flac_plugin.c
@@ -195,59 +195,16 @@ static void flacMetadata(mpd_unused const flac_decoder * dec,
 	flac_metadata_common_cb(block, (FlacData *) vdata);
 }
 
-static void flac_convert_stereo16(unsigned char *dest,
-				  const FLAC__int32 * const buf[],
-				  unsigned int position, unsigned int end)
-{
-	for (; position < end; ++position) {
-		*(uint16_t*)dest = buf[0][position];
-		dest += 2;
-		*(uint16_t*)dest = buf[1][position];
-		dest += 2;
-	}
-}
-
-static void flac_convert(unsigned char *dest,
-			 unsigned int num_channels,
-			 unsigned int bytes_per_sample,
-			 const FLAC__int32 * const buf[],
-			 unsigned int position, unsigned int end)
-{
-	unsigned int c_chan, i;
-	FLAC__uint16 u16;
-	unsigned char *uc;
-
-	for (; position < end; ++position) {
-		for (c_chan = 0; c_chan < num_channels; c_chan++) {
-			u16 = buf[c_chan][position];
-			uc = (unsigned char *)&u16;
-			for (i = 0; i < bytes_per_sample; i++) {
-				*dest++ = *uc++;
-			}
-		}
-	}
-}
-
 static FLAC__StreamDecoderWriteStatus flacWrite(const flac_decoder *dec,
                                                 const FLAC__Frame * frame,
 						const FLAC__int32 * const buf[],
 						void *vdata)
 {
-	FlacData *data = (FlacData *) vdata;
 	FLAC__uint32 samples = frame->header.blocksize;
-	unsigned int c_samp;
-	const unsigned int num_channels = frame->header.channels;
-	const unsigned int bytes_per_sample =
-		audio_format_sample_size(&data->audio_format);
-	const unsigned int bytes_per_channel =
-		bytes_per_sample * frame->header.channels;
-	const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
-	unsigned int num_samples;
+	FlacData *data = (FlacData *) vdata;
 	float timeChange;
 	FLAC__uint64 newPosition = 0;
 
-	assert(data->audio_format.bits > 0);
-
 	timeChange = ((float)samples) / frame->header.sample_rate;
 	data->time += timeChange;
 
@@ -261,34 +218,7 @@ static FLAC__StreamDecoderWriteStatus flacWrite(const flac_decoder *dec,
 	}
 	data->position = newPosition;
 
-	for (c_samp = 0; c_samp < frame->header.blocksize;
-	     c_samp += num_samples) {
-		num_samples = frame->header.blocksize - c_samp;
-		if (num_samples > max_samples)
-			num_samples = max_samples;
-
-		if (num_channels == 2 && bytes_per_sample == 2)
-			flac_convert_stereo16(data->chunk,
-					      buf, c_samp,
-					      c_samp + num_samples);
-		else
-			flac_convert(data->chunk,
-				     num_channels, bytes_per_sample, buf,
-				     c_samp, c_samp + num_samples);
-		data->chunk_length = num_samples * bytes_per_channel;
-
-		if (flacSendChunk(data) < 0) {
-			return
-				FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
-		}
-		data->chunk_length = 0;
-		if (decoder_get_command(data->decoder) == DECODE_COMMAND_SEEK) {
-			return
-				FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-		}
-	}
-
-	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+	return flac_common_write(data, frame, buf);
 }
 
 static struct tag *flacMetadataDup(char *file, int *vorbisCommentFound)
diff --git a/src/inputPlugins/oggflac_plugin.c b/src/inputPlugins/oggflac_plugin.c
index 31ddaab7f..342ebc149 100644
--- a/src/inputPlugins/oggflac_plugin.c
+++ b/src/inputPlugins/oggflac_plugin.c
@@ -157,50 +157,12 @@ static FLAC__StreamDecoderWriteStatus oggflacWrite(mpd_unused const
 {
 	FlacData *data = (FlacData *) vdata;
 	FLAC__uint32 samples = frame->header.blocksize;
-	FLAC__uint16 u16;
-	unsigned char *uc;
-	unsigned int c_samp, c_chan;
-	unsigned int i;
 	float timeChange;
 
 	timeChange = ((float)samples) / frame->header.sample_rate;
 	data->time += timeChange;
 
-	/* ogg123 uses a complicated method of calculating bitrate
-	 * with averaging which I'm not too fond of.
-	 * (waste of memory/CPU cycles, especially given this is _lossless_)
-	 * a get_decode_position() is not available in OggFLAC, either
-	 *
-	 * this does not give an accurate bitrate:
-	 * (bytes_last_read was set in the read callback)
-	 data->bitRate = ((8.0 * data->bytes_last_read *
-	 frame->header.sample_rate)
-	 /((float)samples * 1000)) + 0.5;
-	 */
-
-	for (c_samp = 0; c_samp < frame->header.blocksize; c_samp++) {
-		for (c_chan = 0; c_chan < frame->header.channels;
-		     c_chan++) {
-			u16 = buf[c_chan][c_samp];
-			uc = (unsigned char *)&u16;
-			for (i = 0; i < audio_format_sample_size(&data->audio_format); i++) {
-				if (data->chunk_length >= FLAC_CHUNK_SIZE) {
-					if (flacSendChunk(data) < 0) {
-						return
-						    FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
-					}
-					data->chunk_length = 0;
-					if (decoder_get_command(data->decoder) == DECODE_COMMAND_SEEK) {
-						return
-						    FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-					}
-				}
-				data->chunk[data->chunk_length++] = *(uc++);
-			}
-		}
-	}
-
-	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+	return flac_common_write(data, frame, buf);
 }
 
 /* used by TagDup */
@@ -372,12 +334,6 @@ static int oggflac_decode(struct decoder * mpd_decoder, InputStream * inStream)
 		    (OggFLAC__seekable_stream_decoder_get_state(decoder));
 		OggFLAC__seekable_stream_decoder_finish(decoder);
 	}
-	/* send last little bit */
-	if (data.chunk_length > 0 &&
-	    decoder_get_command(mpd_decoder) == DECODE_COMMAND_NONE) {
-		flacSendChunk(&data);
-		decoder_flush(mpd_decoder);
-	}
 
 fail:
 	oggflac_cleanup(&data, decoder);