C++ (Cpp) alsasrc_parse_spec Examples

Example #1

File: gstalsasrc.c Project: rawoul/gst-plugins-base

static gboolean
gst_alsasrc_prepare (GstAudioSrc * asrc, GstAudioRingBufferSpec * spec)
{
  GstAlsaSrc *alsa;
  gint err;

  alsa = GST_ALSA_SRC (asrc);

  if (!alsasrc_parse_spec (alsa, spec))
    goto spec_parse;

  CHECK (snd_pcm_nonblock (alsa->handle, 0), non_block);

  CHECK (set_hwparams (alsa), hw_params_failed);
  CHECK (set_swparams (alsa), sw_params_failed);
  CHECK (snd_pcm_prepare (alsa->handle), prepare_failed);

  alsa->bpf = GST_AUDIO_INFO_BPF (&spec->info);
  spec->segsize = alsa->period_size * alsa->bpf;
  spec->segtotal = alsa->buffer_size / alsa->period_size;

  return TRUE;

  /* ERRORS */
spec_parse:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Error parsing spec"));
    return FALSE;
  }
non_block:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Could not set device to blocking: %s", snd_strerror (err)));
    return FALSE;
  }
hw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of hwparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
sw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of swparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
prepare_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Prepare failed: %s", snd_strerror (err)));
    return FALSE;
  }
}

Example #2

File: gstalsasrc.c Project: Distrotech/gst-plugins-base

static gboolean
gst_alsasrc_prepare (GstAudioSrc * asrc, GstAudioRingBufferSpec * spec)
{
  GstAlsaSrc *alsa;
  gint err;

  alsa = GST_ALSA_SRC (asrc);

  if (!alsasrc_parse_spec (alsa, spec))
    goto spec_parse;

  CHECK (snd_pcm_nonblock (alsa->handle, 0), non_block);

  CHECK (set_hwparams (alsa), hw_params_failed);
  CHECK (set_swparams (alsa), sw_params_failed);
  CHECK (snd_pcm_prepare (alsa->handle), prepare_failed);

  alsa->bpf = GST_AUDIO_INFO_BPF (&spec->info);
  spec->segsize = alsa->period_size * alsa->bpf;
  spec->segtotal = alsa->buffer_size / alsa->period_size;

  {
    snd_output_t *out_buf = NULL;
    char *msg = NULL;

    snd_output_buffer_open (&out_buf);
    snd_pcm_dump_hw_setup (alsa->handle, out_buf);
    snd_output_buffer_string (out_buf, &msg);
    GST_DEBUG_OBJECT (alsa, "Hardware setup: \n%s", msg);
    snd_output_close (out_buf);
    snd_output_buffer_open (&out_buf);
    snd_pcm_dump_sw_setup (alsa->handle, out_buf);
    snd_output_buffer_string (out_buf, &msg);
    GST_DEBUG_OBJECT (alsa, "Software setup: \n%s", msg);
    snd_output_close (out_buf);
  }

#ifdef SND_CHMAP_API_VERSION
  if (spec->type == GST_AUDIO_RING_BUFFER_FORMAT_TYPE_RAW && alsa->channels < 9) {
    snd_pcm_chmap_t *chmap = snd_pcm_get_chmap (alsa->handle);
    if (chmap && chmap->channels == alsa->channels) {
      GstAudioChannelPosition pos[8];
      if (alsa_chmap_to_channel_positions (chmap, pos))
        gst_audio_ring_buffer_set_channel_positions (GST_AUDIO_BASE_SRC
            (alsa)->ringbuffer, pos);
    }
    free (chmap);
  }
#endif /* SND_CHMAP_API_VERSION */

  return TRUE;

  /* ERRORS */
spec_parse:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Error parsing spec"));
    return FALSE;
  }
non_block:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Could not set device to blocking: %s", snd_strerror (err)));
    return FALSE;
  }
hw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of hwparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
sw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of swparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
prepare_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Prepare failed: %s", snd_strerror (err)));
    return FALSE;
  }
}

Example #3

File: gstalsasrc.c Project: thaytan/gst-plugins-base

static gboolean
gst_alsasrc_prepare (GstAudioSrc * asrc, GstAudioRingBufferSpec * spec)
{
  GstAlsaSrc *alsa;
  gint err;

  alsa = GST_ALSA_SRC (asrc);

  if (!alsasrc_parse_spec (alsa, spec))
    goto spec_parse;

  CHECK (snd_pcm_nonblock (alsa->handle, 0), non_block);

  CHECK (set_hwparams (alsa), hw_params_failed);
  CHECK (set_swparams (alsa), sw_params_failed);
  CHECK (snd_pcm_prepare (alsa->handle), prepare_failed);

  alsa->bpf = GST_AUDIO_INFO_BPF (&spec->info);
  spec->segsize = alsa->period_size * alsa->bpf;
  spec->segtotal = alsa->buffer_size / alsa->period_size;

  {
    snd_output_t *out_buf = NULL;
    char *msg = NULL;

    snd_output_buffer_open (&out_buf);
    snd_pcm_dump_hw_setup (alsa->handle, out_buf);
    snd_output_buffer_string (out_buf, &msg);
    GST_DEBUG_OBJECT (alsa, "Hardware setup: \n%s", msg);
    snd_output_close (out_buf);
    snd_output_buffer_open (&out_buf);
    snd_pcm_dump_sw_setup (alsa->handle, out_buf);
    snd_output_buffer_string (out_buf, &msg);
    GST_DEBUG_OBJECT (alsa, "Software setup: \n%s", msg);
    snd_output_close (out_buf);
  }

#ifdef SND_CHMAP_API_VERSION
  alsa_detect_channels_mapping (GST_OBJECT (alsa), alsa->handle, spec,
      alsa->channels, GST_AUDIO_BASE_SRC (alsa)->ringbuffer);
#endif /* SND_CHMAP_API_VERSION */

  return TRUE;

  /* ERRORS */
spec_parse:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Error parsing spec"));
    return FALSE;
  }
non_block:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Could not set device to blocking: %s", snd_strerror (err)));
    return FALSE;
  }
hw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of hwparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
sw_params_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Setting of swparams failed: %s", snd_strerror (err)));
    return FALSE;
  }
prepare_failed:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Prepare failed: %s", snd_strerror (err)));
    return FALSE;
  }
}