* snd_mpg123.c: added new codec for mp3 playback using libmpg123 as

an alternative to the existing one using libmad. requires at least
  mpg123-1.12.0, i.e. api version 25.


git-svn-id: http://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@414 af15c1b1-3010-417e-b628-4374ebc0bcbd

Quake/Makefile

@@ -19,6 +19,9 @@ USE_CODEC_WAVE=1
 USE_CODEC_MP3=1
 USE_CODEC_VORBIS=1
 
+# which library to use for mp3 decoding: mad or mpg123
+MP3LIB=mad
+
 # ============================================================================
 # Helper functions
 # ============================================================================
@@ -121,6 +124,17 @@ ifeq ($(USE_QS_CONBACK),1)
 CFLAGS+= -DUSE_QS_CONBACK
 endif
 
+ifeq ($(MP3LIB),mad)
+mp3_obj=snd_mp3.o
+else
+ifeq ($(MP3LIB),mpg123)
+mp3_obj=snd_mpg123.o
+else
+USE_CODEC_MP3=no
+mp3_obj=snd_mp3.o
+endif
+endif
+
 CODECLIBS  :=
 ifeq ($(USE_CODEC_WAVE),1)
 CFLAGS+= -DUSE_CODEC_WAVE
@@ -131,7 +145,7 @@ CODECLIBS+= vorbis vorbisfile ogg
 endif
 ifeq ($(USE_CODEC_MP3),1)
 CFLAGS+= -DUSE_CODEC_MP3
-CODECLIBS+= mad
+CODECLIBS+= $(MP3LIB)
 endif
 
 COMMON_LIBS:= m GL
@@ -161,7 +175,7 @@ MUSIC_OBJS:= bgmusic.o \
 	snd_codec.o \
 	snd_wave.o \
 	snd_vorbis.o \
-	snd_mp3.o
+	$(mp3_obj)
 COMOBJ_SND := snd_dma.o snd_mix.o snd_mem.o $(MUSIC_OBJS)
 SYSOBJ_SND := snd_sdl.o
 SYSOBJ_CDA := cd_sdl.o

Quake/Makefile.darwin

@@ -18,6 +18,9 @@ USE_CODEC_WAVE=1
 USE_CODEC_MP3=1
 USE_CODEC_VORBIS=1
 
+# which library to use for mp3 decoding: mad or mpg123
+MP3LIB=mad
+
 # ============================================================================
 # Helper functions
 # ============================================================================
@@ -127,6 +130,17 @@ ifeq ($(USE_QS_CONBACK),1)
 CFLAGS+= -DUSE_QS_CONBACK
 endif
 
+ifeq ($(MP3LIB),mad)
+mp3_obj=snd_mp3.o
+else
+ifeq ($(MP3LIB),mpg123)
+mp3_obj=snd_mpg123.o
+else
+USE_CODEC_MP3=no
+mp3_obj=snd_mp3.o
+endif
+endif
+
 # FIXME: The codec libs stuff are copied over from the unix makefile
 #	 They might need adaptations for Darwin
 CODECLIBS  :=
@@ -139,7 +153,7 @@ CODECLIBS+= -lvorbis -lvorbisfile -logg
 endif
 ifeq ($(USE_CODEC_MP3),1)
 CFLAGS+= -DUSE_CODEC_MP3
-CODECLIBS+= -lmad
+CODECLIBS+= -l$(MP3LIB)
 endif
 
 COMMON_LIBS = -Wl,-framework,OpenGL
@@ -170,7 +184,7 @@ MUSIC_OBJS:= bgmusic.o \
 	snd_codec.o \
 	snd_wave.o \
 	snd_vorbis.o \
-	snd_mp3.o
+	$(mp3_obj)
 COMOBJ_SND := snd_dma.o snd_mix.o snd_mem.o $(MUSIC_OBJS)
 SYSOBJ_SND := snd_sdl.o
 SYSOBJ_CDA := cd_sdl.o

Quake/Makefile.w32

@@ -14,6 +14,9 @@ USE_CODEC_WAVE=1
 USE_CODEC_MP3=1
 USE_CODEC_VORBIS=1
 
+# which library to use for mp3 decoding: mad or mpg123
+MP3LIB=mad
+
 # ============================================================================
 # Helper functions
 # ============================================================================
@@ -93,6 +96,17 @@ ifeq ($(USE_QS_CONBACK),1)
 CFLAGS+= -DUSE_QS_CONBACK
 endif
 
+ifeq ($(MP3LIB),mad)
+mp3_obj=snd_mp3.o
+else
+ifeq ($(MP3LIB),mpg123)
+mp3_obj=snd_mpg123.o
+else
+USE_CODEC_MP3=no
+mp3_obj=snd_mp3.o
+endif
+endif
+
 CODECLIBS  :=
 ifeq ($(USE_CODEC_WAVE),1)
 CFLAGS+= -DUSE_CODEC_WAVE
@@ -109,7 +123,7 @@ ifeq ($(USE_CODEC_MP3),1)
 CFLAGS+= -DUSE_CODEC_MP3
 CODEC_INC = -I../Windows/codecs/include
 CODEC_LINK= -L../Windows/codecs/x86
-CODECLIBS+= -lmad
+CODECLIBS+= -l$(MP3LIB)
 endif
 CFLAGS+= $(CODEC_INC)
 
@@ -142,7 +156,7 @@ MUSIC_OBJS:= bgmusic.o \
 	snd_codec.o \
 	snd_wave.o \
 	snd_vorbis.o \
-	snd_mp3.o
+	$(mp3_obj)
 COMOBJ_SND := snd_dma.o snd_mix.o snd_mem.o $(MUSIC_OBJS)
 SYSOBJ_SND := snd_sdl.o
 SYSOBJ_CDA := cd_sdl.o

Quake/Makefile.w64

@@ -14,6 +14,9 @@ USE_CODEC_WAVE=1
 USE_CODEC_MP3=1
 USE_CODEC_VORBIS=1
 
+# which library to use for mp3 decoding: mad or mpg123
+MP3LIB=mad
+
 # ============================================================================
 # Helper functions
 # ============================================================================
@@ -93,6 +96,17 @@ ifeq ($(USE_QS_CONBACK),1)
 CFLAGS+= -DUSE_QS_CONBACK
 endif
 
+ifeq ($(MP3LIB),mad)
+mp3_obj=snd_mp3.o
+else
+ifeq ($(MP3LIB),mpg123)
+mp3_obj=snd_mpg123.o
+else
+USE_CODEC_MP3=no
+mp3_obj=snd_mp3.o
+endif
+endif
+
 CODECLIBS  :=
 ifeq ($(USE_CODEC_WAVE),1)
 CFLAGS+= -DUSE_CODEC_WAVE
@@ -109,7 +123,7 @@ ifeq ($(USE_CODEC_MP3),1)
 CFLAGS+= -DUSE_CODEC_MP3
 CODEC_INC = -I../Windows/codecs/include
 CODEC_LINK= -L../Windows/codecs/x64
-CODECLIBS+= -lmad
+CODECLIBS+= -l$(MP3LIB)
 endif
 CFLAGS+= $(CODEC_INC)
 
@@ -142,7 +156,7 @@ MUSIC_OBJS:= bgmusic.o \
 	snd_codec.o \
 	snd_wave.o \
 	snd_vorbis.o \
-	snd_mp3.o
+	$(mp3_obj)
 COMOBJ_SND := snd_dma.o snd_mix.o snd_mem.o $(MUSIC_OBJS)
 SYSOBJ_SND := snd_sdl.o
 SYSOBJ_CDA := cd_sdl.o

Quake/snd_mp3.h

@@ -1,4 +1,4 @@
-/* MP3 decoding support using libmad. */
+/* MP3 decoding support using libmad or libmpg123. */
 
 #if !defined(_SND_MP3_H_)
 #define _SND_MP3_H_

Quake/snd_mpg123.c

@@ -0,0 +1,225 @@
+/*
+ * MP3 decoding support using libmpg123, loosely based on an SDL_mixer
+ * plugin found at http://bubu.lv/
+ * See: http://bubu.lv/changeset/4/public/libs/SDL/generated/SDL_mixer
+ *
+ * Copyright (C) 2011 O.Sezer <sezero@users.sourceforge.net>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "quakedef.h"
+
+#if defined(USE_CODEC_MP3)
+#include "snd_codec.h"
+#include "snd_codeci.h"
+#include "snd_mp3.h"
+#include <errno.h>
+#include <mpg123.h>
+
+#if !defined(MPG123_API_VERSION) || (MPG123_API_VERSION < 25)
+#error minimum required libmpg123 version is 1.12.0 (api version 25)
+#endif	/* MPG123_API_VERSION */
+
+/* Private data */
+typedef struct _mp3_priv_t
+{
+	int handle_newed, handle_opened;
+	mpg123_handle* handle;
+} mp3_priv_t;
+
+/* CALLBACK FUNCTIONS: */
+/* CAREFUL: libmpg123 expects POSIX read() and lseek() behavior,
+ * however our FS_fread() and FS_fseek() return fread() and fseek()
+ * compatible values.  */
+
+static ssize_t mp3_read (void *f, void *buf, size_t size)
+{
+	ssize_t ret = (ssize_t) FS_fread(buf, 1, size, (fshandle_t *)f);
+	if (ret == 0 && errno != 0)
+		ret = -1;
+	return ret;
+}
+
+static off_t mp3_seek (void *f, off_t offset, int whence)
+{
+	if (f == NULL) return (-1);
+	if (FS_fseek((fshandle_t *)f, (long) offset, whence) < 0)
+		return (off_t)-1;
+	return (off_t) FS_ftell((fshandle_t *)f);
+}
+
+static qboolean S_MP3_CodecInitialize (void)
+{
+	if (! mp3_codec.initialized)
+	{
+		if (mpg123_init() != MPG123_OK)
+			return false;
+		mp3_codec.initialized = true;
+		return true;
+	}
+
+	return true;
+}
+
+static void S_MP3_CodecShutdown (void)
+{
+	if (mp3_codec.initialized)
+	{
+		mp3_codec.initialized = false;
+		mpg123_exit();
+	}
+}
+
+static snd_stream_t *S_MP3_CodecOpenStream (const char *filename)
+{
+	snd_stream_t *stream;
+	long rate = 0;
+	int encoding = 0, channels = 0;
+	mp3_priv_t *priv = NULL;
+
+	stream = S_CodecUtilOpen(filename, &mp3_codec);
+	if (!stream)
+		return NULL;
+
+	stream->priv = Z_Malloc(sizeof(mp3_priv_t));
+	priv = (mp3_priv_t *) stream->priv;
+	priv->handle = mpg123_new(NULL, NULL);
+	if (priv->handle == NULL)
+	{
+		Con_Printf("Unable to allocate mpg123 handle\n");
+		goto _fail;
+	}
+	priv->handle_newed = 1;
+
+	if (mpg123_replace_reader_handle(priv->handle, mp3_read, mp3_seek, NULL) != MPG123_OK ||
+	    mpg123_open_handle(priv->handle, &stream->fh) != MPG123_OK)
+	{
+		Con_Printf("Unable to open mpg123 handle\n");
+		goto _fail;
+	}
+	priv->handle_opened = 1;
+
+	if (mpg123_getformat(priv->handle, &rate, &channels, &encoding) != MPG123_OK)
+	{
+		Con_Printf("Unable to retrieve mpg123 format for %s\n", filename);
+		goto _fail;
+	}
+
+	switch (channels)
+	{
+	case MPG123_MONO:
+		stream->info.channels = 1;
+		break;
+	case MPG123_STEREO:
+		stream->info.channels = 2;
+		break;
+	default:
+		Con_Printf("Unsupported channel count in %s\n", filename);
+		goto _fail;
+	}
+
+	stream->info.rate = rate;
+
+	switch (encoding)
+	{
+	case MPG123_ENC_UNSIGNED_8:
+		stream->info.width = 1;
+		break;
+	case MPG123_ENC_SIGNED_8:
+	/* unsupported: force mpg123 to convert */
+		stream->info.width = 1;
+		encoding = MPG123_ENC_UNSIGNED_8;
+		break;
+	case MPG123_ENC_SIGNED_16:
+		stream->info.width = 2;
+		break;
+	case MPG123_ENC_UNSIGNED_16:
+	default:
+	/* unsupported: force mpg123 to convert */
+		stream->info.width = 2;
+		encoding = MPG123_ENC_SIGNED_16;
+		break;
+	}
+	if (mpg123_format_support(priv->handle, rate, encoding) == 0)
+	{
+		Con_Printf("Unsupported format for %s\n", filename);
+		goto _fail;
+	}
+	mpg123_format_none(priv->handle);
+	mpg123_format(priv->handle, rate, channels, encoding);
+
+	return stream;
+_fail:
+	if (priv)
+	{
+		if (priv->handle_opened)
+			mpg123_close(priv->handle);
+		if (priv->handle_newed)
+			mpg123_delete(priv->handle);
+		Z_Free(stream->priv);
+	}
+	S_CodecUtilClose(&stream);
+	return NULL;
+}
+
+static int S_MP3_CodecReadStream (snd_stream_t *stream, int bytes, void *buffer)
+{
+	mp3_priv_t *priv = (mp3_priv_t *) stream->priv;
+	size_t bytes_read = 0;
+	int res = mpg123_read (priv->handle, (unsigned char *)buffer, (size_t)bytes, &bytes_read);
+	switch (res)
+	{
+	case MPG123_DONE:
+		Con_DPrintf("mp3 EOF\n");
+	case MPG123_OK:
+		return (int)bytes_read;
+	}
+	return -1; /* error */
+}
+
+static void S_MP3_CodecCloseStream (snd_stream_t *stream)
+{
+	mp3_priv_t *priv = (mp3_priv_t *) stream->priv;
+	mpg123_close(priv->handle);
+	mpg123_delete(priv->handle);
+	Z_Free(stream->priv);
+	S_CodecUtilClose(&stream);
+}
+
+static int S_MP3_CodecRewindStream (snd_stream_t *stream)
+{
+	mp3_priv_t *priv = (mp3_priv_t *) stream->priv;
+	return (int) mpg123_seek(priv->handle, 0, SEEK_SET);
+}
+
+snd_codec_t mp3_codec =
+{
+	CODECTYPE_MP3,
+	false,
+	".mp3",
+	S_MP3_CodecInitialize,
+	S_MP3_CodecShutdown,
+	S_MP3_CodecOpenStream,
+	S_MP3_CodecReadStream,
+	S_MP3_CodecRewindStream,
+	S_MP3_CodecCloseStream,
+	NULL
+};
+
+#endif	/* USE_CODEC_MP3 */
+

README.html

@@ -113,7 +113,7 @@ Compile time options include
 <LI><B>make SDL_CONFIG=</B><EM>/PATH/TO/SDL-CONFIG</EM> for unusual SDL installs</LI>
 </UL>
 </P>
-<P>Streaming music playback requires "libmad" for MP3, and "libogg", "libvorbis" for OGG files.</P>
+<P>Streaming music playback requires "libmad" or "libmpg123" for MP3, and "libogg" and "libvorbis" for OGG files.</P>
 <P>HOME directory support can be enabled via the <B>Misc/homedir_0.patch</B></P>
 <P>The project can also be built with Codeblocks (project files included).</P>
 .

README.sgml

@@ -66,7 +66,7 @@ Compile time options include
 <item><bf>make SDLNET=1</bf> to enable SDL_net (Otherwise the socket api will be used directly)
 <item><bf>make SDL_CONFIG=</bf><em>/PATH/TO/SDL-CONFIG</em> for unusual SDL installs
 </itemize>
-<p>Streaming music playback requires "libmad" for MP3, and "libogg", "libvorbis" for OGG files.
+<p>Streaming music playback requires "libmad" or "libmpg123" for MP3, and "libogg" and "libvorbis" for OGG files.
 <p>HOME directory support can be enabled via the <bf>Misc/homedir_0.patch</bf>
 <p>The project can also be built with Codeblocks (project files included).</p>.
 

README.txt

@@ -109,8 +109,8 @@
 
   o  make SDL_CONFIG=/PATH/TO/SDL-CONFIG for unusual SDL installs
 
-  Streaming music playback requires "libmad" for MP3, and "libogg",
-  "libvorbis" for OGG files.
+  Streaming music playback requires "libmad" or "libmpg123" for MP3, and
+  "libogg" and "libvorbis" for OGG files.
 
   HOME directory support can be enabled via the Misc/homedir_0.patch