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