File: ifusionsound.c

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fusionsound 0.9.25-2
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/*
   (c) Copyright 2000-2002  convergence integrated media GmbH.
   (c) Copyright 2002-2005  convergence GmbH.

   All rights reserved.

   Written by Denis Oliver Kropp <dok@directfb.org>,
              Andreas Hundt <andi@fischlustig.de>,
              Sven Neumann <sven@convergence.de> and
              Claudio Ciccani <klan@users.sf.net>.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

#include <config.h>

#include <unistd.h>

#include <fusionsound.h>

#include <direct/interface.h>
#include <direct/mem.h>

#include <core/core_sound.h>
#include <core/sound_buffer.h>

#include <ifusionsound.h>
#include <ifusionsoundbuffer.h>
#include <ifusionsoundstream.h>

#include <media/ifusionsoundmusicprovider.h>

#include <misc/fs_config.h>

/*
 * private data struct of IFusionSound
 */
typedef struct {
     int              ref;       /* reference counter */

     CoreSound       *core;
} IFusionSound_data;


static void
IFusionSound_Destruct( IFusionSound *thiz )
{
     IFusionSound_data *data = (IFusionSound_data*)thiz->priv;

     fs_core_destroy( data->core, false );

     DIRECT_DEALLOCATE_INTERFACE( thiz );
     
     if (ifusionsound_singleton == thiz)
          ifusionsound_singleton = NULL;
}

static DFBResult
IFusionSound_AddRef( IFusionSound *thiz )
{
     DIRECT_INTERFACE_GET_DATA (IFusionSound);

     data->ref++;

     return DFB_OK;
}

static DFBResult
IFusionSound_Release( IFusionSound *thiz )
{
     DIRECT_INTERFACE_GET_DATA (IFusionSound)

     if (--data->ref == 0)
          IFusionSound_Destruct( thiz );

     return DFB_OK;
}

static DFBResult
IFusionSound_CreateBuffer( IFusionSound         *thiz,
                           FSBufferDescription  *desc,
                           IFusionSoundBuffer  **ret_interface )
{
     DFBResult                 ret;
     int                       channels = fs_config->channels;
     FSSampleFormat            format   = fs_config->sampleformat;
     int                       rate     = fs_config->samplerate;
     int                       length   = 0;
     FSBufferDescriptionFlags  flags;
     CoreSoundBuffer          *buffer;
     IFusionSoundBuffer       *interface;

     DIRECT_INTERFACE_GET_DATA (IFusionSound);

     if (!desc || !ret_interface)
          return DFB_INVARG;

     flags = desc->flags;

     if (flags & ~FSBDF_ALL)
          return DFB_INVARG;

     if (flags & FSBDF_CHANNELS) {
          switch (desc->channels) {
               case 1:
               case 2:
                    channels = desc->channels;
                    break;

               default:
                    return DFB_INVARG;
          }
     }
     
     if (flags & FSBDF_SAMPLEFORMAT) {
          switch (format) {
               case FSSF_U8:
               case FSSF_S16:
               case FSSF_S24:
               case FSSF_S32:
                    format = desc->sampleformat;
                    break;

               default:
                    return DFB_INVARG;
          }
     }
     
     if (flags & FSBDF_SAMPLERATE) {
          if (desc->samplerate < 1)
               return DFB_INVARG;
          rate = desc->samplerate;
     }
          
     if (flags & FSBDF_LENGTH)
          length = desc->length;

     if (length < 1)
          return DFB_INVARG;

     ret = fs_buffer_create( data->core,
                             length, channels, format, rate, &buffer );
     if (ret)
          return ret;

     DIRECT_ALLOCATE_INTERFACE( interface, IFusionSoundBuffer );

     ret = IFusionSoundBuffer_Construct( interface, data->core, buffer,
                                         length, channels, format, rate );
     if (ret)
          *ret_interface = NULL;
     else
          *ret_interface = interface;

     fs_buffer_unref( buffer );

     return ret;
}

static DFBResult
IFusionSound_CreateStream( IFusionSound         *thiz,
                           FSStreamDescription  *desc,
                           IFusionSoundStream  **ret_interface )
{
     DFBResult                 ret;
     int                       channels  = fs_config->channels;
     FSSampleFormat            format    = fs_config->sampleformat;
     int                       rate      = fs_config->samplerate;
     int                       size      = rate;     /* space for one second */
     int                       prebuffer = 0;        /* no prebuffer by default */
     FSStreamDescriptionFlags  flags     = FSSDF_NONE;
     CoreSoundBuffer          *buffer;
     IFusionSoundStream       *interface;

     DIRECT_INTERFACE_GET_DATA (IFusionSound);

     if (!ret_interface)
          return DFB_INVARG;

     if (desc) {
          flags = desc->flags;

          if (flags & ~FSSDF_ALL)
               return DFB_INVARG;

          if (flags & FSSDF_CHANNELS) {
               switch (desc->channels) {
                    case 1:
                    case 2:
                         channels = desc->channels;
                         break;

                    default:
                         return DFB_INVARG;
               }
          }               

          if (flags & FSSDF_SAMPLEFORMAT) {
               switch (desc->sampleformat) {
                    case FSSF_U8:
                    case FSSF_S16:
                    case FSSF_S24:
                    case FSSF_S32:
                         format = desc->sampleformat;
                         break;

                    default:
                         return DFB_INVARG;
               }
          }    

          if (flags & FSSDF_SAMPLERATE) {
               if (desc->samplerate < 1)
                    return DFB_INVARG;
               rate = desc->samplerate;
          }
               
          if (flags & FSSDF_BUFFERSIZE) {
               if (desc->buffersize < 1)
                    return DFB_INVARG;
               size = desc->buffersize;
          } else
               size = rate;

          if (flags & FSSDF_PREBUFFER) {
               if (desc->prebuffer >= size)
                    return DFB_INVARG;
               prebuffer = desc->prebuffer;
          }
     }

     /* Limit ring buffer size to five seconds. */
     if (size > rate * 5)
          return DFB_LIMITEXCEEDED;

     ret = fs_buffer_create( data->core,
                             size, channels, format, rate, &buffer );
     if (ret)
          return ret;

     DIRECT_ALLOCATE_INTERFACE( interface, IFusionSoundStream );

     ret = IFusionSoundStream_Construct( interface, data->core, buffer, size,
                                         channels, format, rate, prebuffer );
     if (ret)
          *ret_interface = NULL;
     else
          *ret_interface = interface;

     fs_buffer_unref( buffer );

     return ret;
}

static DFBResult
IFusionSound_CreateMusicProvider( IFusionSound               *thiz,
                                  const char                 *filename,
                                  IFusionSoundMusicProvider **interface )
{
     DFBResult                            ret;
     DirectInterfaceFuncs                *funcs = NULL;
     IFusionSoundMusicProvider           *musicprovider;
     IFusionSoundMusicProvider_ProbeContext ctx;

     DIRECT_INTERFACE_GET_DATA(IFusionSound)

     /* Check arguments */
     if (!interface || !filename)
          return DFB_INVARG;

     /* Fill out probe context */
     ctx.filename = filename;

     /* Find a suitable implemenation */
     ret = DirectGetInterface( &funcs,
                               "IFusionSoundMusicProvider", NULL, DirectProbeInterface, &ctx );

     if (ret)
          return ret;

     DIRECT_ALLOCATE_INTERFACE( musicprovider, IFusionSoundMusicProvider );

     /* Construct the interface */
     ret = funcs->Construct( musicprovider, filename );
     if (ret)
          return ret;

     *interface = musicprovider;

     return DFB_OK;
}

DFBResult
IFusionSound_Construct( IFusionSound *thiz )
{
     DFBResult ret;

     /* Allocate interface data. */
     DIRECT_ALLOCATE_INTERFACE_DATA( thiz, IFusionSound );

     /* Initialize interface data. */
     data->ref = 1;

     /* Create the core instance. */
     ret = fs_core_create( &data->core );
     if (ret) {
          DirectFBError( "FusionSound: fs_core_create() failed", ret );

          DIRECT_DEALLOCATE_INTERFACE( thiz );

          return ret;
     }

     /* Assign interface pointers. */
     thiz->AddRef              = IFusionSound_AddRef;
     thiz->Release             = IFusionSound_Release;
     thiz->CreateBuffer        = IFusionSound_CreateBuffer;
     thiz->CreateStream        = IFusionSound_CreateStream;
     thiz->CreateMusicProvider = IFusionSound_CreateMusicProvider;

     return DFB_OK;
}