libmpcodecs/ad_dshow.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/DirectShow decoders",
  16         "dshow",
  17         "Nick Kurshev",
  18         "avifile.sf.net",
  19         ""
  20 };
  21
  22 LIBAD_EXTERN(dshow)
  23
  24 #include "dshow/DS_AudioDecoder.h"
  25
  26 static int init(sh_audio_t *sh)
  27 {
  28   return 1;
  29 }
  30
  31 static int preinit(sh_audio_t *sh_audio)
  32 {
  33   DS_AudioDecoder* ds_adec;
  34   if(!(ds_adec=DS_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf)))
  35   {
  36     mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingDLLcodec,sh_audio->codec->dll);
  37     return 0;
  38   }
  39     sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
  40     sh_audio->channels=sh_audio->wf->nChannels;
  41     sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
  42     sh_audio->samplesize=2;
  43     sh_audio->audio_in_minsize=2*sh_audio->wf->nBlockAlign;
  44     if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
  45     sh_audio->audio_out_minsize=16384;
  46     sh_audio->context = ds_adec;
  47   mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DShow audio codec init OK!\n");
  48   return 1;
  49 }
  50
  51 static void uninit(sh_audio_t *sh)
  52 {
  53     DS_AudioDecoder* ds_adec = sh->context;
  54     DS_AudioDecoder_Destroy(ds_adec);
  55 }
  56
  57 static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
  58 {
  59   int skip;
  60     switch(cmd)
  61     {
  62       case ADCTRL_SKIP_FRAME:
  63                     skip=sh_audio->wf->nBlockAlign;
  64                     if(skip<16){
  65                       skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
  66                       if(skip<16) skip=16;
  67                     }
  68                     demux_read_data(sh_audio->ds,NULL,skip);
  69           return CONTROL_TRUE;
  70     }
  71   return CONTROL_UNKNOWN;
  72 }
  73
  74 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
  75 {
  76         DS_AudioDecoder* ds_adec = sh_audio->context;
  77 //      int len=-1;
  78         int size_in=0;
  79         int size_out=0;
  80         int srcsize=DS_AudioDecoder_GetSrcSize(ds_adec, maxlen);
  81         mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DShow says: srcsize=%d  (buffsize=%d)  out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
  82         if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
  83         if(sh_audio->a_in_buffer_len<srcsize){
  84           sh_audio->a_in_buffer_len+=
  85             demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
  86             srcsize-sh_audio->a_in_buffer_len);
  87         }
  88         DS_AudioDecoder_Convert(ds_adec, sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
  89             buf,maxlen, &size_in,&size_out);
  90         mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"DShow: 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));
  91         if(size_in>=sh_audio->a_in_buffer_len){
  92           sh_audio->a_in_buffer_len=0;
  93         } else {
  94           sh_audio->a_in_buffer_len-=size_in;
  95           memcpy(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
  96         }
  97 //        len=size_out;
  98   return size_out;
  99 }
 100 #endif