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 #include "ad_internal.h"
  10
  11 static const ad_info_t info =
  12 {
  13         "Win32/DirectShow decoders",
  14         "dshow",
  15         "Nick Kurshev",
  16         "avifile.sf.net",
  17         ""
  18 };
  19
  20 LIBAD_EXTERN(dshow)
  21
  22 #include "loader/dshow/DS_AudioDecoder.h"
  23
  24 static int init(sh_audio_t *sh)
  25 {
  26   return 1;
  27 }
  28
  29 static int preinit(sh_audio_t *sh_audio)
  30 {
  31   DS_AudioDecoder* ds_adec;
  32   if(!(ds_adec=DS_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf)))
  33   {
  34     mp_tmsg(MSGT_DECAUDIO,MSGL_ERR,"ERROR: Could not open required DirectShow codec %s.\n",sh_audio->codec->dll);
  35     return 0;
  36   }
  37     sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
  38     sh_audio->channels=sh_audio->wf->nChannels;
  39     sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
  40     sh_audio->samplesize=2;
  41     sh_audio->audio_in_minsize=2*sh_audio->wf->nBlockAlign;
  42     if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
  43     sh_audio->audio_out_minsize=16384;
  44     sh_audio->context = ds_adec;
  45   mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DShow audio codec init OK!\n");
  46   return 1;
  47 }
  48
  49 static void uninit(sh_audio_t *sh)
  50 {
  51     DS_AudioDecoder* ds_adec = sh->context;
  52     DS_AudioDecoder_Destroy(ds_adec);
  53 }
  54
  55 static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
  56 {
  57   int skip;
  58     switch(cmd)
  59     {
  60       case ADCTRL_SKIP_FRAME:
  61                     skip=sh_audio->wf->nBlockAlign;
  62                     if(skip<16){
  63                       skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
  64                       if(skip<16) skip=16;
  65                     }
  66                     demux_read_data(sh_audio->ds,NULL,skip);
  67           return CONTROL_TRUE;
  68     }
  69   return CONTROL_UNKNOWN;
  70 }
  71
  72 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
  73 {
  74         DS_AudioDecoder* ds_adec = sh_audio->context;
  75 //      int len=-1;
  76         int size_in=0;
  77         int size_out=0;
  78         int srcsize=DS_AudioDecoder_GetSrcSize(ds_adec, maxlen);
  79         mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DShow says: srcsize=%d  (buffsize=%d)  out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
  80         if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
  81         if(sh_audio->a_in_buffer_len<srcsize){
  82           sh_audio->a_in_buffer_len+=
  83             demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
  84             srcsize-sh_audio->a_in_buffer_len);
  85         }
  86         DS_AudioDecoder_Convert(ds_adec, sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
  87             buf,maxlen, &size_in,&size_out);
  88         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));
  89         if(size_in>=sh_audio->a_in_buffer_len){
  90           sh_audio->a_in_buffer_len=0;
  91         } else {
  92           sh_audio->a_in_buffer_len-=size_in;
  93           memcpy(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
  94         }
  95 //        len=size_out;
  96   return size_out;
  97 }