libmpcodecs/ad_dshow.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 #include "help_mp.h"
  26
  27 #include "ad_internal.h"
  28
  29 static const ad_info_t info =
  30 {
  31         "Win32/DirectShow decoders",
  32         "dshow",
  33         "Nick Kurshev",
  34         "avifile.sf.net",
  35         ""
  36 };
  37
  38 LIBAD_EXTERN(dshow)
  39
  40 #include "loader/dshow/DS_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   DS_AudioDecoder* ds_adec;
  50   if(!(ds_adec=DS_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf)))
  51   {
  52     mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingDLLcodec,sh_audio->codec->dll);
  53     return 0;
  54   }
  55     sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
  56     sh_audio->channels=sh_audio->wf->nChannels;
  57     sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
  58     sh_audio->samplesize=2;
  59     sh_audio->audio_in_minsize=2*sh_audio->wf->nBlockAlign;
  60     if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
  61     sh_audio->audio_out_minsize=16384;
  62     sh_audio->context = ds_adec;
  63   mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DShow audio codec init OK!\n");
  64   return 1;
  65 }
  66
  67 static void uninit(sh_audio_t *sh)
  68 {
  69     DS_AudioDecoder* ds_adec = sh->context;
  70     DS_AudioDecoder_Destroy(ds_adec);
  71 }
  72
  73 static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
  74 {
  75   int skip;
  76     switch(cmd)
  77     {
  78       case ADCTRL_SKIP_FRAME:
  79                     skip=sh_audio->wf->nBlockAlign;
  80                     if(skip<16){
  81                       skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
  82                       if(skip<16) skip=16;
  83                     }
  84                     demux_read_data(sh_audio->ds,NULL,skip);
  85           return CONTROL_TRUE;
  86     }
  87   return CONTROL_UNKNOWN;
  88 }
  89
  90 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
  91 {
  92         DS_AudioDecoder* ds_adec = sh_audio->context;
  93 //      int len=-1;
  94         int size_in=0;
  95         int size_out=0;
  96         int srcsize=DS_AudioDecoder_GetSrcSize(ds_adec, maxlen);
  97         mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DShow says: srcsize=%d  (buffsize=%d)  out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
  98         if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
  99         if(sh_audio->a_in_buffer_len<srcsize){
 100           sh_audio->a_in_buffer_len+=
 101             demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
 102             srcsize-sh_audio->a_in_buffer_len);
 103         }
 104         DS_AudioDecoder_Convert(ds_adec, sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
 105             buf,maxlen, &size_in,&size_out);
 106         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));
 107         if(size_in>=sh_audio->a_in_buffer_len){
 108           sh_audio->a_in_buffer_len=0;
 109         } else {
 110           sh_audio->a_in_buffer_len-=size_in;
 111           memcpy(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
 112         }
 113 //        len=size_out;
 114   return size_out;
 115 }