Restore fixed-point conversions modules.

audio_format handles all conversion between integer and float formats,
but none of the conversions from/to fixed-point.

This partially reverts commit 7cde22ed.

modules/audio_filter/converter/Modules.am

+SOURCES_converter_fixed = fixed.c
+SOURCES_converter_float = float.c
 SOURCES_converter_neon = neon.c
 SOURCES_a52tospdif = a52tospdif.c
 SOURCES_a52tofloat32 = a52tofloat32.c
@@ -8,6 +10,8 @@ SOURCES_audio_format = format.c
 
 libvlc_LTLIBRARIES += \
 	libaudio_format_plugin.la \
+	libconverter_fixed_plugin.la \
+	libconverter_float_plugin.la \
 	$(NULL)
 if HAVE_NEON
 libvlc_LTLIBRARIES += libconverter_neon_plugin.la

modules/audio_filter/converter/fixed.c

+/*****************************************************************************
+ * fixed.c: Fixed-point audio format conversions
+ *****************************************************************************
+ * Copyright (C) 2002, 2006 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Jean-Paul Saman <jpsaman _at_ videolan _dot_ org>
+ *          Marc Ariberti <marcari@videolan.org>
+ *          Samuel Hocevar <sam@zoy.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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_aout.h>
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int  Create_F32ToS16    ( vlc_object_t * );
+static void Do_F32ToS16( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                         aout_buffer_t * );
+
+static int  Create_S16ToF32    ( vlc_object_t * );
+static void Do_S16ToF32( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                         aout_buffer_t * );
+
+static int  Create_U8ToF32    ( vlc_object_t * );
+static void Do_U8ToF32( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                         aout_buffer_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin ()
+    set_description( N_("Fixed point audio format conversions") )
+    add_submodule ()
+        set_callbacks( Create_F32ToS16, NULL )
+        set_capability( "audio filter", 10 )
+    add_submodule ()
+        set_callbacks( Create_S16ToF32, NULL )
+        set_capability( "audio filter", 15 )
+    add_submodule ()
+        set_callbacks( Create_U8ToF32, NULL )
+        set_capability( "audio filter", 1 )
+vlc_module_end ()
+
+/*****************************************************************************
+ * F32 to S16
+ *****************************************************************************/
+static int Create_F32ToS16( vlc_object_t *p_this )
+{
+    aout_filter_t * p_filter = (aout_filter_t *)p_this;
+
+    if ( p_filter->fmt_in.audio.i_format != VLC_CODEC_FI32
+          || p_filter->fmt_out.audio.i_format != VLC_CODEC_S16N )
+    {
+        return -1;
+    }
+
+    if ( !AOUT_FMTS_SIMILAR( &p_filter->fmt_in.audio, &p_filter->fmt_out.audio ) )
+    {
+        return -1;
+    }
+
+    p_filter->pf_do_work = Do_F32ToS16;
+    p_filter->b_in_place = 1;
+
+    return VLC_SUCCESS;;
+}
+
+/*****************************************************************************
+ * support routines borrowed from mpg321 (file: mad.c), which is distributed
+ * under GPL license
+ *
+ * mpg321 was written by Joe Drew <drew@debian.org>, and based upon 'plaympeg'
+ * from the smpeg sources, which was written by various people from Loki Software
+ * (http://www.lokigames.com).
+ *
+ * It also incorporates some source from mad, written by Robert Leslie
+ *****************************************************************************/
+
+/* The following two routines and data structure are from the ever-brilliant
+     Rob Leslie.
+*/
+
+#define VLC_F_FRACBITS  28
+
+# if VLC_F_FRACBITS == 28
+#  define VLC_F(x) ((vlc_fixed_t) (x##L))
+# endif
+
+# define VLC_F_ONE VLC_F(0x10000000)
+
+/*****************************************************************************
+ * s24_to_s16_pcm: Scale a 24 bit pcm sample to a 16 bit pcm sample.
+ *****************************************************************************/
+static inline int16_t s24_to_s16_pcm(vlc_fixed_t sample)
+{
+  /* round */
+  sample += (1L << (VLC_F_FRACBITS - 16));
+
+  /* clip */
+  if (sample >= VLC_F_ONE)
+    sample = VLC_F_ONE - 1;
+  else if (sample < -VLC_F_ONE)
+    sample = -VLC_F_ONE;
+
+  /* quantize */
+  return (sample >> (VLC_F_FRACBITS + 1 - 16));
+}
+
+static void Do_F32ToS16( aout_instance_t * p_aout, aout_filter_t * p_filter,
+                         aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+    VLC_UNUSED(p_aout);
+    int i;
+    vlc_fixed_t * p_in = (vlc_fixed_t *)p_in_buf->p_buffer;
+    int16_t * p_out = (int16_t *)p_out_buf->p_buffer;
+
+    for ( i = p_in_buf->i_nb_samples
+               * aout_FormatNbChannels( &p_filter->fmt_in.audio ) ; i-- ; )
+    {
+        /* Fast Scaling */
+        *p_out++ = s24_to_s16_pcm(*p_in++);
+    }
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_buffer = p_in_buf->i_buffer / 2;
+}
+
+
+/*****************************************************************************
+ * S16 to F32
+ *****************************************************************************/
+static int Create_S16ToF32( vlc_object_t *p_this )
+{
+    aout_filter_t * p_filter = (aout_filter_t *)p_this;
+
+    if ( p_filter->fmt_out.audio.i_format != VLC_CODEC_FI32
+          || p_filter->fmt_in.audio.i_format != VLC_CODEC_S16N )
+    {
+        return -1;
+    }
+
+    if ( !AOUT_FMTS_SIMILAR( &p_filter->fmt_in.audio, &p_filter->fmt_out.audio ) )
+    {
+        return -1;
+    }
+
+    p_filter->pf_do_work = Do_S16ToF32;
+    p_filter->b_in_place = 1;
+
+    return 0;
+}
+
+static void Do_S16ToF32( aout_instance_t * p_aout, aout_filter_t * p_filter,
+                         aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+    VLC_UNUSED(p_aout);
+    int i = p_in_buf->i_nb_samples * aout_FormatNbChannels( &p_filter->fmt_in.audio );
+
+    /* We start from the end because b_in_place is true */
+    int16_t * p_in = (int16_t *)p_in_buf->p_buffer + i - 1;
+    vlc_fixed_t * p_out = (vlc_fixed_t *)p_out_buf->p_buffer + i - 1;
+
+    while( i-- )
+    {
+        *p_out = (vlc_fixed_t)( (int32_t)(*p_in) * (FIXED32_ONE >> 16) );
+        p_in--; p_out--;
+    }
+
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_buffer = p_in_buf->i_buffer
+            * sizeof(vlc_fixed_t) / sizeof(int16_t);
+}
+
+
+/*****************************************************************************
+ * U8 to F32
+ *****************************************************************************/
+static int Create_U8ToF32( vlc_object_t *p_this )
+{
+    aout_filter_t * p_filter = (aout_filter_t *)p_this;
+
+    if ( p_filter->fmt_in.audio.i_format != VLC_CODEC_U8
+          || p_filter->fmt_out.audio.i_format != VLC_CODEC_FI32 )
+    {
+        return -1;
+    }
+
+    if ( !AOUT_FMTS_SIMILAR( &p_filter->fmt_in.audio, &p_filter->fmt_out.audio ) )
+    {
+        return -1;
+    }
+
+    p_filter->pf_do_work = Do_U8ToF32;
+    p_filter->b_in_place = true;
+
+    return 0;
+}
+
+static void Do_U8ToF32( aout_instance_t * p_aout, aout_filter_t * p_filter,
+                        aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+    VLC_UNUSED(p_aout);
+    int i = p_in_buf->i_nb_samples * aout_FormatNbChannels( &p_filter->fmt_in.audio );
+
+    /* We start from the end because b_in_place is true */
+    uint8_t * p_in = (uint8_t *)p_in_buf->p_buffer + i - 1;
+    vlc_fixed_t * p_out = (vlc_fixed_t *)p_out_buf->p_buffer + i - 1;
+
+    while( i-- )
+    {
+        *p_out = (vlc_fixed_t)( (int32_t)(*p_in - 128) * (FIXED32_ONE / 128) );
+        p_in--; p_out--;
+    }
+
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_buffer = p_in_buf->i_buffer * sizeof(vlc_fixed_t);
+}

modules/audio_filter/converter/float.c

+/*****************************************************************************
+ * float.c: Floating point audio format conversions
+ *****************************************************************************
+ * Copyright (C) 2002, 2006 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Jean-Paul Saman <jpsaman _at_ videolan _dot_ org>
+ *          Christophe Massiot <massiot@via.ecp.fr>
+ *          Samuel Hocevar <sam@zoy.org>
+ *          Xavier Maillard <zedek@fxgsproject.org>
+ *          Henri Fallon <henri@videolan.org>
+ *          Gildas Bazin <gbazin@netcourrier.com>
+ *
+ * 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.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+
+#ifdef HAVE_UNISTD_H
+#   include <unistd.h>
+#endif
+
+#include <vlc_aout.h>
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int  Create_F32ToFL32 ( vlc_object_t * );
+static void Do_F32ToFL32( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                           aout_buffer_t * );
+static void Do_FL32ToF32 ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+                           aout_buffer_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin ()
+    set_description( N_("Floating-point audio format conversions") )
+    add_submodule ()
+        set_capability( "audio filter", 10 )
+        set_callbacks( Create_F32ToFL32, NULL )
+vlc_module_end ()
+
+/*****************************************************************************
+ * Fixed 32 to Float 32 and backwards
+ *****************************************************************************/
+static int Create_F32ToFL32( vlc_object_t *p_this )
+{
+    aout_filter_t * p_filter = (aout_filter_t *)p_this;
+
+    if( ( p_filter->fmt_in.audio.i_format != VLC_CODEC_FI32
+           || p_filter->fmt_out.audio.i_format != VLC_CODEC_FL32 )
+      && ( p_filter->fmt_in.audio.i_format != VLC_CODEC_FL32
+            || p_filter->fmt_out.audio.i_format != VLC_CODEC_FI32 ) )
+    {
+        return -1;
+    }
+
+    if ( !AOUT_FMTS_SIMILAR( &p_filter->fmt_in.audio, &p_filter->fmt_out.audio ) )
+    {
+        return -1;
+    }
+
+    if( p_filter->fmt_in.audio.i_format == VLC_CODEC_FI32 )
+    {
+        p_filter->pf_do_work = Do_F32ToFL32;
+    }
+    else
+    {
+        p_filter->pf_do_work = Do_FL32ToF32;
+    }
+
+    p_filter->b_in_place = 1;
+
+    return 0;
+}
+
+static void Do_F32ToFL32( aout_instance_t * p_aout, aout_filter_t * p_filter,
+                          aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+    VLC_UNUSED(p_aout);
+    int i;
+    vlc_fixed_t * p_in = (vlc_fixed_t *)p_in_buf->p_buffer;
+    float * p_out = (float *)p_out_buf->p_buffer;
+
+    for ( i = p_in_buf->i_nb_samples
+               * aout_FormatNbChannels( &p_filter->fmt_in.audio ) ; i-- ; )
+    {
+        *p_out++ = (float)*p_in++ / (float)FIXED32_ONE;
+    }
+
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_buffer = p_in_buf->i_buffer;
+}
+
+static void Do_FL32ToF32( aout_instance_t * p_aout, aout_filter_t * p_filter,
+                          aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+    VLC_UNUSED(p_aout);
+    int i;
+    float * p_in = (float *)p_in_buf->p_buffer;
+    vlc_fixed_t * p_out = (vlc_fixed_t *)p_out_buf->p_buffer;
+
+    for ( i = p_in_buf->i_nb_samples
+               * aout_FormatNbChannels( &p_filter->fmt_in.audio ) ; i-- ; )
+    {
+        *p_out++ = (vlc_fixed_t)( *p_in++ * (float)FIXED32_ONE );
+    }
+
+    p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+    p_out_buf->i_buffer = p_in_buf->i_buffer;
+}