libmpcodecs/ad_dmo.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4
   5 #include "config.h"
   6 #include "mp_msg.h"
   7 #include "help_mp.h"
   8
   9 #ifdef USE_DIRECTSHOW
  10
  11 #include "ad_internal.h"
  12
  13 static ad_info_t info =
  14 {
  15         "Win32/DMO decoders",
  16         "dmo",
  17         "A'rpi",
  18         "avifile.sf.net",
  19         ""
  20 };
  21
  22 LIBAD_EXTERN(dmo)
  23
  24 #include "dmo/DMO_AudioDecoder.h"
  25
  26 static int init(sh_audio_t *sh)
  27 {
  28   return 1;
  29 }
  30
  31 extern int audio_output_channels;
  32
  33 static int preinit(sh_audio_t *sh_audio)
  34 {
  35   DMO_AudioDecoder* ds_adec;
  36   int chans=(audio_output_channels==sh_audio->wf->nChannels) ?
  37       audio_output_channels : (sh_audio->wf->nChannels>=2 ? 2 : 1);
  38   if(!(ds_adec=DMO_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf,chans)))
  39   {
  40     mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingDLLcodec,sh_audio->codec->dll);
  41     return 0;
  42   }
  43     sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
  44     sh_audio->channels=chans;
  45     sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
  46     sh_audio->samplesize=2;
  47     sh_audio->audio_in_minsize=4*sh_audio->wf->nBlockAlign;
  48     if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
  49     sh_audio->audio_out_minsize=4*16384;
  50     sh_audio->context = ds_adec;
  51   mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DMO audio codec init OK!\n");
  52   return 1;
  53 }
  54
  55 static void uninit(sh_audio_t *sh)
  56 {
  57     DMO_AudioDecoder* ds_adec = sh->context;
  58     DMO_AudioDecoder_Destroy(ds_adec);
  59 }
  60
  61 static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
  62 {
  63   int skip;
  64     switch(cmd)
  65     {
  66       case ADCTRL_SKIP_FRAME:
  67                     skip=sh_audio->wf->nBlockAlign;
  68                     if(skip<16){
  69                       skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
  70                       if(skip<16) skip=16;
  71                     }
  72                     demux_read_data(sh_audio->ds,NULL,skip);
  73           return CONTROL_TRUE;
  74     }
  75   return CONTROL_UNKNOWN;
  76 }
  77
  78 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
  79 {
  80         DMO_AudioDecoder* ds_adec = sh_audio->context;
  81 //      int len=-1;
  82         int size_in=0;
  83         int size_out=0;
  84         int srcsize=DMO_AudioDecoder_GetSrcSize(ds_adec, maxlen);
  85         mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DMO says: srcsize=%d  (buffsize=%d)  out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
  86         if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
  87         if(sh_audio->a_in_buffer_len<srcsize){
  88           sh_audio->a_in_buffer_len+=
  89             demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
  90             srcsize-sh_audio->a_in_buffer_len);
  91         }
  92         DMO_AudioDecoder_Convert(ds_adec, sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
  93             buf,maxlen, &size_in,&size_out);
  94         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));
  95         if(size_in>=sh_audio->a_in_buffer_len){
  96           sh_audio->a_in_buffer_len=0;
  97         } else {
  98           sh_audio->a_in_buffer_len-=size_in;
  99           memmove(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
 100         }
 101 //        len=size_out;
 102   return size_out;
 103 }
 104 #endif