libmpcodecs/ad_pcm.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer 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 General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22
  23 #include "config.h"
  24 #include "ad_internal.h"
  25 #include "libaf/af_format.h"
  26 #include "libaf/reorder_ch.h"
  27
  28 static const ad_info_t info =
  29 {
  30         "Uncompressed PCM audio decoder",
  31         "pcm",
  32         "Nick Kurshev",
  33         "A'rpi",
  34         ""
  35 };
  36
  37 LIBAD_EXTERN(pcm)
  38
  39 static int init(sh_audio_t *sh_audio)
  40 {
  41   WAVEFORMATEX *h=sh_audio->wf;
  42   if (!h)
  43     return 0;
  44   sh_audio->i_bps=h->nAvgBytesPerSec;
  45   sh_audio->channels=h->nChannels;
  46   sh_audio->samplerate=h->nSamplesPerSec;
  47   sh_audio->samplesize=(h->wBitsPerSample+7)/8;
  48   sh_audio->sample_format=AF_FORMAT_S16_LE; // default
  49   switch(sh_audio->format){ /* hardware formats: */
  50     case 0x0:
  51     case 0x1: // Microsoft PCM
  52     case 0xfffe: // Extended
  53        switch (sh_audio->samplesize) {
  54          case 1: sh_audio->sample_format=AF_FORMAT_U8; break;
  55          case 2: sh_audio->sample_format=AF_FORMAT_S16_LE; break;
  56          case 3: sh_audio->sample_format=AF_FORMAT_S24_LE; break;
  57          case 4: sh_audio->sample_format=AF_FORMAT_S32_LE; break;
  58        }
  59        break;
  60     case 0x3: // IEEE float
  61        sh_audio->sample_format=AF_FORMAT_FLOAT_LE;
  62        break;
  63     case 0x6:  sh_audio->sample_format=AF_FORMAT_A_LAW;break;
  64     case 0x7:  sh_audio->sample_format=AF_FORMAT_MU_LAW;break;
  65     case 0x11: sh_audio->sample_format=AF_FORMAT_IMA_ADPCM;break;
  66     case 0x50: sh_audio->sample_format=AF_FORMAT_MPEG2;break;
  67 /*    case 0x2000: sh_audio->sample_format=AFMT_AC3; */
  68     case 0x20776172: // 'raw '
  69        sh_audio->sample_format=AF_FORMAT_S16_BE;
  70        if(sh_audio->samplesize==1) sh_audio->sample_format=AF_FORMAT_U8;
  71        break;
  72     case 0x736F7774: // 'twos'
  73        sh_audio->sample_format=AF_FORMAT_S16_BE;
  74        // intended fall-through
  75     case 0x74776F73: // 'sowt'
  76        if(sh_audio->samplesize==1) sh_audio->sample_format=AF_FORMAT_S8;
  77        break;
  78     case 0x32336c66: // 'fl32', bigendian float32
  79        sh_audio->sample_format=AF_FORMAT_FLOAT_BE;
  80        sh_audio->samplesize=4;
  81        break;
  82     case 0x666c3332: // '23lf', little endian float32, MPlayer internal fourCC
  83        sh_audio->sample_format=AF_FORMAT_FLOAT_LE;
  84        sh_audio->samplesize=4;
  85        break;
  86 /*    case 0x34366c66: // 'fl64', bigendian float64
  87        sh_audio->sample_format=AF_FORMAT_FLOAT_BE;
  88        sh_audio->samplesize=8;
  89        break;
  90     case 0x666c3634: // '46lf', little endian float64, MPlayer internal fourCC
  91        sh_audio->sample_format=AF_FORMAT_FLOAT_LE;
  92        sh_audio->samplesize=8;
  93        break;*/
  94     case 0x34326e69: // 'in24', bigendian int24
  95        sh_audio->sample_format=AF_FORMAT_S24_BE;
  96        sh_audio->samplesize=3;
  97        break;
  98     case 0x696e3234: // '42ni', little endian int24, MPlayer internal fourCC
  99        sh_audio->sample_format=AF_FORMAT_S24_LE;
 100        sh_audio->samplesize=3;
 101        break;
 102     case 0x32336e69: // 'in32', bigendian int32
 103        sh_audio->sample_format=AF_FORMAT_S32_BE;
 104        sh_audio->samplesize=4;
 105        break;
 106     case 0x696e3332: // '23ni', little endian int32, MPlayer internal fourCC
 107        sh_audio->sample_format=AF_FORMAT_S32_LE;
 108        sh_audio->samplesize=4;
 109        break;
 110     default: if(sh_audio->samplesize!=2) sh_audio->sample_format=AF_FORMAT_U8;
 111   }
 112   if (!sh_audio->samplesize) // this would cause MPlayer to hang later
 113     sh_audio->samplesize = 2;
 114   return 1;
 115 }
 116
 117 static int preinit(sh_audio_t *sh)
 118 {
 119   sh->audio_out_minsize=2048;
 120   return 1;
 121 }
 122
 123 static void uninit(sh_audio_t *sh)
 124 {
 125 }
 126
 127 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 128 {
 129   int skip;
 130     switch(cmd)
 131     {
 132       case ADCTRL_SKIP_FRAME:
 133         skip=sh->i_bps/16;
 134         skip=skip&(~3);
 135         demux_read_data(sh->ds,NULL,skip);
 136         return CONTROL_TRUE;
 137     }
 138   return CONTROL_UNKNOWN;
 139 }
 140
 141 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
 142 {
 143   unsigned len = sh_audio->channels*sh_audio->samplesize;
 144   len = (minlen + len - 1) / len * len;
 145   if (len > maxlen)
 146       // if someone needs hundreds of channels adjust audio_out_minsize
 147       // based on channels in preinit()
 148       return -1;
 149   len=demux_read_data(sh_audio->ds,buf,len);
 150   if (len > 0 && sh_audio->channels >= 5) {
 151     reorder_channel_nch(buf, AF_CHANNEL_LAYOUT_WAVEEX_DEFAULT,
 152                         AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 153                         sh_audio->channels,
 154                         len / sh_audio->samplesize, sh_audio->samplesize);
 155   }
 156   return len;
 157 }