interpretor/libsndfile-1.0.25/src/ogg_pcm.c

   1 /*
   2 ** Copyright (C) 2008-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** This program is free software ; you can redistribute it and/or modify
   5 ** it under the terms of the GNU Lesser General Public License as published by
   6 ** the Free Software Foundation ; either version 2.1 of the License, or
   7 ** (at your option) any later version.
   8 **
   9 ** This program is distributed in the hope that it will be useful,
  10 ** but WITHOUT ANY WARRANTY ; without even the implied warranty of
  11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 ** GNU Lesser General Public License for more details.
  13 **
  14 ** You should have received a copy of the GNU Lesser General Public License
  15 ** along with this program ; if not, write to the Free Software
  16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19
  20 #include "sfconfig.h"
  21
  22 #include <stdio.h>
  23 #include <fcntl.h>
  24 #include <string.h>
  25 #include <ctype.h>
  26 #include <time.h>
  27 #include <math.h>
  28
  29 #if HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif
  32
  33 #include "sndfile.h"
  34 #include "sfendian.h"
  35 #include "common.h"
  36
  37 #if (ENABLE_EXPERIMENTAL_CODE && HAVE_EXTERNAL_LIBS)
  38
  39 #include <ogg/ogg.h>
  40
  41 #include "ogg.h"
  42
  43 typedef struct
  44 {       int32_t serialno ;
  45
  46
  47         void * state ;
  48 } OPCM_PRIVATE ;
  49
  50 static int      opcm_read_header (SF_PRIVATE * psf) ;
  51 static int      opcm_close (SF_PRIVATE *psf) ;
  52
  53 int
  54 ogg_pcm_open (SF_PRIVATE *psf)
  55 {       OGG_PRIVATE* odata = psf->container_data ;
  56         OPCM_PRIVATE* opcm = calloc (1, sizeof (OPCM_PRIVATE)) ;
  57         int     error = 0 ;
  58
  59         if (odata == NULL)
  60         {       psf_log_printf (psf, "%s : odata is NULL???\n", __func__) ;
  61                 return SFE_INTERNAL ;
  62                 } ;
  63
  64         psf->codec_data = opcm ;
  65         if (opcm == NULL)
  66                 return SFE_MALLOC_FAILED ;
  67
  68         if (psf->file.mode == SFM_RDWR)
  69                 return SFE_BAD_MODE_RW ;
  70
  71         if (psf->file.mode == SFM_READ)
  72         {       /* Call this here so it only gets called once, so no memory is leaked. */
  73                 ogg_sync_init (&odata->osync) ;
  74
  75                 if ((error = opcm_read_header (psf)))
  76                         return error ;
  77
  78 #if 0
  79                 psf->read_short         = opcm_read_s ;
  80                 psf->read_int           = opcm_read_i ;
  81                 psf->read_float         = opcm_read_f ;
  82                 psf->read_double        = opcm_read_d ;
  83                 psf->sf.frames          = opcm_length (psf) ;
  84 #endif
  85                 } ;
  86
  87         psf->codec_close = opcm_close ;
  88
  89         if (psf->file.mode == SFM_WRITE)
  90         {
  91 #if 0
  92                 /* Set the default opcm quality here. */
  93                 vdata->quality = 0.4 ;
  94
  95                 psf->write_header       = opcm_write_header ;
  96                 psf->write_short        = opcm_write_s ;
  97                 psf->write_int          = opcm_write_i ;
  98                 psf->write_float        = opcm_write_f ;
  99                 psf->write_double       = opcm_write_d ;
 100 #endif
 101
 102                 psf->sf.frames = SF_COUNT_MAX ; /* Unknown really */
 103                 psf->str_flags = SF_STR_ALLOW_START ;
 104                 } ;
 105
 106         psf->bytewidth = 1 ;
 107         psf->blockwidth = psf->bytewidth * psf->sf.channels ;
 108
 109 #if 0
 110         psf->seek = opcm_seek ;
 111         psf->command = opcm_command ;
 112 #endif
 113
 114         /* FIXME, FIXME, FIXME : Hack these here for now and correct later. */
 115         psf->sf.format = SF_FORMAT_OGG | SF_FORMAT_SPEEX ;
 116         psf->sf.sections = 1 ;
 117
 118         psf->datalength = 1 ;
 119         psf->dataoffset = 0 ;
 120         /* End FIXME. */
 121
 122         return error ;
 123 } /* ogg_pcm_open */
 124
 125 static int
 126 opcm_read_header (SF_PRIVATE * UNUSED (psf))
 127 {
 128         return 0 ;
 129 } /* opcm_read_header */
 130
 131 static int
 132 opcm_close (SF_PRIVATE * UNUSED (psf))
 133 {
 134
 135
 136         return 0 ;
 137 } /* opcm_close */
 138
 139
 140
 141 /*
 142 encoded_speex_frames = (frames_per_packet * Packets)
 143                      = 1 * 272
 144                      = 272
 145
 146 audio_samples = encoded_speex_frames * frame_size
 147               = 272 * 640
 148               = 174080
 149
 150 duration = audio_samples / rate
 151          = 174080 / 44100
 152          = 3.947
 153 */
 154
 155 #else /* ENABLE_EXPERIMENTAL_CODE && HAVE_EXTERNAL_LIBS */
 156
 157 int
 158 ogg_pcm_open (SF_PRIVATE *psf)
 159 {
 160         psf_log_printf (psf, "This version of libsndfile was compiled without Ogg/Speex support.\n") ;
 161         return SFE_UNIMPLEMENTED ;
 162 } /* ogg_pcm_open */
 163
 164 #endif