pcm_utils: moved code to pcm_format.c

Moved all code which converts the sample format to a separate library.

4 files changed, 187 insertions, 126 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index c5259b15..00891cfc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -53,6 +53,7 @@ mpd_headers = \
 	pcm_volume.h \
 	pcm_mix.h \
 	pcm_channels.h \
+	pcm_format.h \
 	pcm_resample.h \
 	pcm_dither.h \
 	pcm_prng.h \
@@ -134,6 +135,7 @@ mpd_SOURCES = \
 	pcm_volume.c \
 	pcm_mix.c \
 	pcm_channels.c \
+	pcm_format.c \
 	pcm_resample.c \
 	pcm_dither.c \
 	permission.c \
diff --git a/src/pcm_format.c b/src/pcm_format.c
new file mode 100644
index 00000000..9e6f4226
--- /dev/null
+++ b/src/pcm_format.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "pcm_format.h"
+#include "pcm_utils.h"
+
+#include <glib.h>
+
+static void
+pcm_convert_8_to_16(int16_t *out, const int8_t *in,
+		    unsigned num_samples)
+{
+	while (num_samples > 0) {
+		*out++ = *in++ << 8;
+		--num_samples;
+	}
+}
+
+static void
+pcm_convert_24_to_16(struct pcm_dither_24 *dither,
+		     int16_t *out, const int32_t *in,
+		     unsigned num_samples)
+{
+	pcm_dither_24_to_16(dither, out, in, num_samples);
+}
+
+const int16_t *
+pcm_convert_to_16(struct pcm_convert_state *convert,
+		  uint8_t bits, const void *src,
+		  size_t src_size, size_t *dest_size_r)
+{
+	static int16_t *buf;
+	static size_t len;
+	unsigned num_samples;
+
+	switch (bits) {
+	case 8:
+		num_samples = src_size;
+		*dest_size_r = src_size << 1;
+		if (*dest_size_r > len) {
+			len = *dest_size_r;
+			buf = g_realloc(buf, len);
+		}
+
+		pcm_convert_8_to_16((int16_t *)buf,
+				    (const int8_t *)src,
+				    num_samples);
+		return buf;
+
+	case 16:
+		*dest_size_r = src_size;
+		return src;
+
+	case 24:
+		num_samples = src_size / 4;
+		*dest_size_r = num_samples * 2;
+		if (*dest_size_r > len) {
+			len = *dest_size_r;
+			buf = g_realloc(buf, len);
+		}
+
+		pcm_convert_24_to_16(&convert->dither,
+				     (int16_t *)buf,
+				     (const int32_t *)src,
+				     num_samples);
+		return buf;
+	}
+
+	g_warning("only 8 or 16 bits are supported for conversion!\n");
+	return NULL;
+}
+
+static void
+pcm_convert_8_to_24(int32_t *out, const int8_t *in,
+		    unsigned num_samples)
+{
+	while (num_samples > 0) {
+		*out++ = *in++ << 16;
+		--num_samples;
+	}
+}
+
+static void
+pcm_convert_16_to_24(int32_t *out, const int16_t *in,
+		     unsigned num_samples)
+{
+	while (num_samples > 0) {
+		*out++ = *in++ << 8;
+		--num_samples;
+	}
+}
+
+const int32_t *
+pcm_convert_to_24(uint8_t bits, const void *src,
+		  size_t src_size, size_t *dest_size_r)
+{
+	static int32_t *buf;
+	static size_t len;
+	unsigned num_samples;
+
+	switch (bits) {
+	case 8:
+		num_samples = src_size;
+		*dest_size_r = src_size * 4;
+		if (*dest_size_r > len) {
+			len = *dest_size_r;
+			buf = g_realloc(buf, len);
+		}
+
+		pcm_convert_8_to_24(buf, (const int8_t *)src,
+				    num_samples);
+		return buf;
+
+	case 16:
+		num_samples = src_size / 2;
+		*dest_size_r = num_samples * 4;
+		if (*dest_size_r > len) {
+			len = *dest_size_r;
+			buf = g_realloc(buf, len);
+		}
+
+		pcm_convert_16_to_24(buf, (const int16_t *)src,
+				     num_samples);
+		return buf;
+
+	case 24:
+		*dest_size_r = src_size;
+		return src;
+	}
+
+	g_warning("only 8 or 24 bits are supported for conversion!\n");
+	return NULL;
+}
diff --git a/src/pcm_format.h b/src/pcm_format.h
new file mode 100644
index 00000000..2c52adea
--- /dev/null
+++ b/src/pcm_format.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef PCM_FORMAT_H
+#define PCM_FORMAT_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+struct pcm_convert_state;
+
+const int16_t *
+pcm_convert_to_16(struct pcm_convert_state *convert,
+		  uint8_t bits, const void *src,
+		  size_t src_size, size_t *dest_size_r);
+
+const int32_t *
+pcm_convert_to_24(uint8_t bits, const void *src,
+		  size_t src_size, size_t *dest_size_r);
+
+#endif
diff --git a/src/pcm_utils.c b/src/pcm_utils.c
index fd2786e3..3e66edef 100644
--- a/src/pcm_utils.c
+++ b/src/pcm_utils.c
@@ -18,6 +18,7 @@
 
 #include "pcm_utils.h"
 #include "pcm_channels.h"
+#include "pcm_format.h"
 #include "conf.h"
 #include "audio_format.h"
 
@@ -37,132 +38,6 @@ void pcm_convert_init(struct pcm_convert_state *state)
 	pcm_dither_24_init(&state->dither);
 }
 
-static void
-pcm_convert_8_to_16(int16_t *out, const int8_t *in,
-		    unsigned num_samples)
-{
-	while (num_samples > 0) {
-		*out++ = *in++ << 8;
-		--num_samples;
-	}
-}
-
-static void
-pcm_convert_24_to_16(struct pcm_dither_24 *dither,
-		     int16_t *out, const int32_t *in,
-		     unsigned num_samples)
-{
-	pcm_dither_24_to_16(dither, out, in, num_samples);
-}
-
-static const int16_t *
-pcm_convert_to_16(struct pcm_convert_state *convert,
-		  uint8_t bits, const void *src,
-		  size_t src_size, size_t *dest_size_r)
-{
-	static int16_t *buf;
-	static size_t len;
-	unsigned num_samples;
-
-	switch (bits) {
-	case 8:
-		num_samples = src_size;
-		*dest_size_r = src_size << 1;
-		if (*dest_size_r > len) {
-			len = *dest_size_r;
-			buf = g_realloc(buf, len);
-		}
-
-		pcm_convert_8_to_16((int16_t *)buf,
-				    (const int8_t *)src,
-				    num_samples);
-		return buf;
-
-	case 16:
-		*dest_size_r = src_size;
-		return src;
-
-	case 24:
-		num_samples = src_size / 4;
-		*dest_size_r = num_samples * 2;
-		if (*dest_size_r > len) {
-			len = *dest_size_r;
-			buf = g_realloc(buf, len);
-		}
-
-		pcm_convert_24_to_16(&convert->dither,
-				     (int16_t *)buf,
-				     (const int32_t *)src,
-				     num_samples);
-		return buf;
-	}
-
-	g_warning("only 8 or 16 bits are supported for conversion!\n");
-	return NULL;
-}
-
-static void
-pcm_convert_8_to_24(int32_t *out, const int8_t *in,
-		    unsigned num_samples)
-{
-	while (num_samples > 0) {
-		*out++ = *in++ << 16;
-		--num_samples;
-	}
-}
-
-static void
-pcm_convert_16_to_24(int32_t *out, const int16_t *in,
-		     unsigned num_samples)
-{
-	while (num_samples > 0) {
-		*out++ = *in++ << 8;
-		--num_samples;
-	}
-}
-
-static const int32_t *
-pcm_convert_to_24(uint8_t bits, const void *src,
-		  size_t src_size, size_t *dest_size_r)
-{
-	static int32_t *buf;
-	static size_t len;
-	unsigned num_samples;
-
-	switch (bits) {
-	case 8:
-		num_samples = src_size;
-		*dest_size_r = src_size * 4;
-		if (*dest_size_r > len) {
-			len = *dest_size_r;
-			buf = g_realloc(buf, len);
-		}
-
-		pcm_convert_8_to_24(buf, (const int8_t *)src,
-				    num_samples);
-		return buf;
-
-	case 16:
-		num_samples = src_size / 2;
-		*dest_size_r = num_samples * 4;
-		if (*dest_size_r > len) {
-			len = *dest_size_r;
-			buf = g_realloc(buf, len);
-		}
-
-		pcm_convert_16_to_24(buf, (const int16_t *)src,
-				     num_samples);
-		return buf;
-
-	case 24:
-		*dest_size_r = src_size;
-		return src;
-	}
-
-	g_warning("only 8 or 24 bits are supported for conversion!\n");
-	return NULL;
-}
-
 static size_t
 pcm_convert_16(const struct audio_format *src_format,
 	       const void *src_buffer, size_t src_size,