C++ (Cpp) a52_resample_init Examples

Example #1

File: a52_decode.c Project: Pivosgroup/aml-original-linux-buildroot

static int liba52_init(adec_feeder_t * feeder)
{
	uint32_t a52_accel = 0;
	int flags = 0;

	c_feeder = feeder;
	if (feeder == NULL)
		return -1;

	memset(&a52_buffer, 0, sizeof(a52_buffer));
	a52_buffer.a_in_buffer = frame_buffer;

	a52_state = a52_init(a52_accel);
	if (a52_state == NULL) {
		printf("A52 init failed !\n");
		return -1;
	}

	if (a52_fillbuff(&a52_buffer) < 0) {
		printf("A52 sync failed !\n");
		return -1;
	}

	a52_buffer.channels = audio_output_channels;
	switch (a52_buffer.channels) {
	case 1:
		a52_flags = A52_MONO;
		break;
		/*case 2: a52_flags=A52_STEREO; break; */
	case 2:
		a52_flags = A52_DOLBY;
		break;
		/*case 3: a52_flags=A52_3F; break; */
	case 3:
		a52_flags = A52_2F1R;
		break;
	case 4:
		a52_flags = A52_2F2R;
		break;		/* 2+2 */
	case 5:
		a52_flags = A52_3F2R;
		break;
	case 6:
		a52_flags = A52_3F2R | A52_LFE;
		break;		/* 5.1 */
	}
	flags |= a52_flags;

	if (a52_resample_init(a52_accel, flags, a52_buffer.channels) < 0) {
		printf("a52_resample_init  failed!\n");
		a52_free(a52_state);
		return -1;
	}

	feeder->channel_num = audio_output_channels;
	feeder->sample_rate = a52_buffer.samplerate;

	return 0;
}

Example #2

File: ad_liba52.c Project: OpenSageTV/mplayer-sage9orig

static int init(sh_audio_t *sh_audio)
{
  uint32_t a52_accel=0;
  sample_t level=a52_level, bias=384;
  int flags=0;
  /* Dolby AC3 audio:*/
  if(gCpuCaps.hasSSE) a52_accel|=MM_ACCEL_X86_SSE;
  if(gCpuCaps.hasMMX) a52_accel|=MM_ACCEL_X86_MMX;
  if(gCpuCaps.hasMMX2) a52_accel|=MM_ACCEL_X86_MMXEXT;
  if(gCpuCaps.has3DNow) a52_accel|=MM_ACCEL_X86_3DNOW;
  if(gCpuCaps.has3DNowExt) a52_accel|=MM_ACCEL_X86_3DNOWEXT;
  if(gCpuCaps.hasAltiVec) a52_accel|=MM_ACCEL_PPC_ALTIVEC;
  a52_state=a52_init (a52_accel);
  if (a52_state == NULL) {
	mp_msg(MSGT_DECAUDIO,MSGL_ERR,"A52 init failed\n");
	return 0;
  }
  if(a52_fillbuff(sh_audio)<0){
	mp_msg(MSGT_DECAUDIO,MSGL_ERR,"A52 sync failed\n");
	return 0;
  }


  /* Init a52 dynrng */
  if (a52_drc_level < 0.001) {
	  /* level == 0 --> no compression, init library without callback */
	  a52_drc_action = DRC_NO_COMPRESSION;
  } else if (a52_drc_level > 0.999) {
	  /* level == 1 --> full compression, do nothing at all (library default = full compression) */
	  a52_drc_action = DRC_NO_ACTION;
  } else {
	  a52_drc_action = DRC_CALLBACK;
  }
  /* Library init for dynrng has to be done for each frame, see decode_audio() */


  /* 'a52 cannot upmix' hotfix:*/
  a52_printinfo(sh_audio);
  sh_audio->channels=audio_output_channels;
while(sh_audio->channels>0){
  switch(sh_audio->channels){
	    case 1: a52_flags=A52_MONO; break;
/*	    case 2: a52_flags=A52_STEREO; break;*/
	    case 2: a52_flags=A52_DOLBY; break;
/*	    case 3: a52_flags=A52_3F; break;*/
	    case 3: a52_flags=A52_2F1R; break;
	    case 4: a52_flags=A52_2F2R; break; /* 2+2*/
	    case 5: a52_flags=A52_3F2R; break;
	    case 6: a52_flags=A52_3F2R|A52_LFE; break; /* 5.1*/
  }
  /* test:*/
  flags=a52_flags|A52_ADJUST_LEVEL;
  mp_msg(MSGT_DECAUDIO,MSGL_V,"A52 flags before a52_frame: 0x%X\n",flags);
  if (a52_frame (a52_state, sh_audio->a_in_buffer, &flags, &level, bias)){
    mp_msg(MSGT_DECAUDIO,MSGL_ERR,"a52: error decoding frame -> nosound\n");
    return 0;
  }
  mp_msg(MSGT_DECAUDIO,MSGL_V,"A52 flags after a52_frame: 0x%X\n",flags);
  /* frame decoded, let's init resampler:*/
  channel_map = 0;
  if (sh_audio->sample_format == AF_FORMAT_FLOAT_NE) {
      if (!(flags & A52_LFE)) {
	  switch ((flags<<3) | sh_audio->channels) {
	    case (A52_MONO    << 3) | 1: channel_map = 0x1; break;
	    case (A52_CHANNEL << 3) | 2:
	    case (A52_STEREO  << 3) | 2:
	    case (A52_DOLBY   << 3) | 2: channel_map =    0x21; break;
	    case (A52_2F1R    << 3) | 3: channel_map =   0x321; break;
	    case (A52_2F2R    << 3) | 4: channel_map =  0x4321; break;
	    case (A52_3F      << 3) | 5: channel_map = 0x2ff31; break;
	    case (A52_3F2R    << 3) | 5: channel_map = 0x25431; break;
	  }
      } else if (sh_audio->channels == 6) {
	  switch (flags & ~A52_LFE) {
	    case A52_MONO   : channel_map = 0x12ffff; break;
	    case A52_CHANNEL:
	    case A52_STEREO :
	    case A52_DOLBY  : channel_map = 0x1fff32; break;
	    case A52_3F     : channel_map = 0x13ff42; break;
	    case A52_2F1R   : channel_map = 0x1f4432; break;
	    case A52_2F2R   : channel_map = 0x1f5432; break;
	    case A52_3F2R   : channel_map = 0x136542; break;
	  }
      }
      if (channel_map) {
	  a52_resample = a52_resample_float;
	  break;
      }
  } else
  if(a52_resample_init(a52_accel,flags,sh_audio->channels)) break;
  --sh_audio->channels; /* try to decrease no. of channels*/
}
  if(sh_audio->channels<=0){
    mp_msg(MSGT_DECAUDIO,MSGL_ERR,"a52: no resampler. try different channel setup!\n");
    return 0;
  }
  return 1;
}