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, 90 insertions, 120 deletions

diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c
index 9950f75db..ddf25a0b9 100644
--- a/src/inputPlugins/_flac_common.c
+++ b/src/inputPlugins/_flac_common.c
@@ -194,4 +194,89 @@ void flac_error_common_cb(const char *plugin,
 	}
 }
 
+/* keep this inlined, this is just macro but prettier :) */
+static inline enum dc_action flacSendChunk(FlacData * data)
+{
+	enum dc_action ret = ob_send(data->chunk, data->chunk_length,
+	                             data->time, data->bitRate,
+	                             data->replayGainInfo);
+	data->chunk_length = 0;
+	return ret;
+}
+
+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 = (dc.audio_format.bits / 8);
+	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(dc.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;
+
+		switch (flacSendChunk(data)) {
+		case DC_ACTION_STOP:
+			return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+		case DC_ACTION_SEEK:
+			return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+		default: break; /* compilers are complainers */
+		}
+	}
+
+	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 a1b0cac8f..8031f8e69 100644
--- a/src/inputPlugins/_flac_common.h
+++ b/src/inputPlugins/_flac_common.h
@@ -160,15 +160,9 @@ void flac_error_common_cb(const char *plugin,
 struct mpd_tag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
 					   struct mpd_tag *tag);
 
-/* keep this inlined, this is just macro but prettier :) */
-static inline enum dc_action flacSendChunk(FlacData * data)
-{
-	enum dc_action ret = ob_send(data->chunk, data->chunk_length,
-	                             data->time, data->bitRate,
-	                             data->replayGainInfo);
-	data->chunk_length = 0;
-	return ret;
-}
+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 f66ca4845..2bf5a29bf 100644
--- a/src/inputPlugins/flac_plugin.c
+++ b/src/inputPlugins/flac_plugin.c
@@ -199,39 +199,6 @@ 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[],
@@ -239,18 +206,9 @@ static FLAC__StreamDecoderWriteStatus flacWrite(const flac_decoder *dec,
 {
 	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 = (dc.audio_format.bits / 8);
-	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;
 	float timeChange;
 	FLAC__uint64 newPosition = 0;
 
-	assert(dc.audio_format.bits > 0);
-
 	timeChange = ((float)samples) / frame->header.sample_rate;
 	data->time += timeChange;
 
@@ -264,32 +222,7 @@ 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;
-
-		switch (flacSendChunk(data)) {
-		case DC_ACTION_STOP:
-			return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
-		case DC_ACTION_SEEK:
-			return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-		default: break; /* compilers are complainers */
-		}
-	}
-
-	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+	return flac_common_write(data, frame, buf);
 }
 
 static struct mpd_tag *flacMetadataDup(char *file, int *vorbisCommentFound)
diff --git a/src/inputPlugins/oggflac_plugin.c b/src/inputPlugins/oggflac_plugin.c
index 841030481..49da3dd39 100644
--- a/src/inputPlugins/oggflac_plugin.c
+++ b/src/inputPlugins/oggflac_plugin.c
@@ -162,51 +162,12 @@ 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;
-	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 < (dc.audio_format.bits / 8); i++) {
-				if (data->chunk_length >= FLAC_CHUNK_SIZE) {
-					/* FIXME: line wrapping */
-					switch (flacSendChunk(data)) {
-					case DC_ACTION_STOP:
-						return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
-					case DC_ACTION_SEEK:
-						return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-					default:
-						/* compilers are complainers */
-						break;
-					}
-				}
-				data->chunk[data->chunk_length++] = *(uc++);
-			}
-		}
-	}
-
-	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+	return flac_common_write(data, frame, buf);
 }
 
 /* used by TagDup */
@@ -380,9 +341,6 @@ static int oggflac_decode(InputStream * inStream)
 		    (OggFLAC__seekable_stream_decoder_get_state(decoder));
 		OggFLAC__seekable_stream_decoder_finish(decoder);
 	}
-	/* send last little bit */
-	if (data.chunk_length > 0 && !dc_intr())
-		flacSendChunk(&data);
 
 fail:
 	oggflac_cleanup(&data, decoder);