libmpcodecs/ad_dmo.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 "mp_msg.h"
  25
  26 #include "ad_internal.h"
  27 #include "libaf/reorder_ch.h"
  28
  29 static const ad_info_t info =
  30 {
  31         "Win32/DMO decoders",
  32         "dmo",
  33         "A'rpi",
  34         "avifile.sf.net",
  35         ""
  36 };
  37
  38 LIBAD_EXTERN(dmo)
  39
  40 #include "loader/dmo/DMO_AudioDecoder.h"
  41
  42 static int init(sh_audio_t *sh)
  43 {
  44   return 1;
  45 }
  46
  47 static int preinit(sh_audio_t *sh_audio)
  48 {
  49   DMO_AudioDecoder* ds_adec;
  50   int chans=(audio_output_channels==sh_audio->wf->nChannels) ?
  51       audio_output_channels : (sh_audio->wf->nChannels>=2 ? 2 : 1);
  52   if(!(ds_adec=DMO_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf,chans)))
  53   {
  54     mp_tmsg(MSGT_DECAUDIO,MSGL_ERR,"ERROR: Could not open required DirectShow codec %s.\n",sh_audio->codec->dll);
  55     return 0;
  56   }
  57     sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
  58     sh_audio->channels=chans;
  59     sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
  60     sh_audio->samplesize=2;
  61     sh_audio->audio_in_minsize=4*sh_audio->wf->nBlockAlign;
  62     if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
  63     sh_audio->audio_out_minsize=4*16384;
  64     sh_audio->context = ds_adec;
  65   mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DMO audio codec init OK!\n");
  66   return 1;
  67 }
  68
  69 static void uninit(sh_audio_t *sh)
  70 {
  71     DMO_AudioDecoder* ds_adec = sh->context;
  72     DMO_AudioDecoder_Destroy(ds_adec);
  73 }
  74
  75 static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
  76 {
  77   int skip;
  78     switch(cmd)
  79     {
  80       case ADCTRL_SKIP_FRAME:
  81                     skip=sh_audio->wf->nBlockAlign;
  82                     if(skip<16){
  83                       skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
  84                       if(skip<16) skip=16;
  85                     }
  86                     demux_read_data(sh_audio->ds,NULL,skip);
  87           return CONTROL_TRUE;
  88     }
  89   return CONTROL_UNKNOWN;
  90 }
  91
  92 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
  93 {
  94         DMO_AudioDecoder* ds_adec = sh_audio->context;
  95 //      int len=-1;
  96         int size_in=0;
  97         int size_out=0;
  98         int srcsize=DMO_AudioDecoder_GetSrcSize(ds_adec, maxlen);
  99         mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DMO says: srcsize=%d  (buffsize=%d)  out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
 100         if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
 101         if(sh_audio->a_in_buffer_len<srcsize){
 102           sh_audio->a_in_buffer_len+=
 103             demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
 104             srcsize-sh_audio->a_in_buffer_len);
 105         }
 106         DMO_AudioDecoder_Convert(ds_adec, sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
 107             buf,maxlen, &size_in,&size_out);
 108         mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"DMO: audio %d -> %d converted  (in_buf_len=%d of %d)  %d\n",size_in,size_out,sh_audio->a_in_buffer_len,sh_audio->a_in_buffer_size,ds_tell_pts(sh_audio->ds));
 109         if(size_in>=sh_audio->a_in_buffer_len){
 110           sh_audio->a_in_buffer_len=0;
 111         } else {
 112           sh_audio->a_in_buffer_len-=size_in;
 113           memmove(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
 114         }
 115         if (size_out > 0 && sh_audio->channels >= 5) {
 116           reorder_channel_nch(buf, AF_CHANNEL_LAYOUT_WAVEEX_DEFAULT,
 117                               AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 118                               sh_audio->channels,
 119                               size_out / sh_audio->samplesize,
 120                               sh_audio->samplesize);
 121         }
 122 //        len=size_out;
 123   return size_out;
 124 }