C++ (Cpp) alsasink_parse_spec Exemples

Exemple #1

Fichier : gstalsasink.c Projet : pli3/gst-plugins-base

static gboolean
gst_alsasink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
{
    GstAlsaSink *alsa;
    gint err;

    alsa = GST_ALSA_SINK (asink);

    if (alsa->iec958) {
        snd_pcm_close (alsa->handle);
        alsa->handle = gst_alsa_open_iec958_pcm (GST_OBJECT (alsa), alsa->device);
        if (G_UNLIKELY (!alsa->handle)) {
            goto no_iec958;
        }
    }

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

    CHECK (set_hwparams (alsa), hw_params_failed);
    CHECK (set_swparams (alsa), sw_params_failed);

    alsa->bytes_per_sample = spec->bytes_per_sample;
    spec->segsize = alsa->period_size * spec->bytes_per_sample;
    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);
    }

    return TRUE;

    /* ERRORS */
no_iec958:
    {
        GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_WRITE, (NULL),
                           ("Could not open IEC958 (SPDIF) device for playback"));
        return FALSE;
    }
spec_parse:
    {
        GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
                           ("Error parsing spec"));
        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;
    }
}

Exemple #2

Fichier : gstalsasink.c Projet : Distrotech/gst-plugins-base

static gboolean
gst_alsasink_prepare (GstAudioSink * asink, GstAudioRingBufferSpec * spec)
{
  GstAlsaSink *alsa;
  gint err;

  alsa = GST_ALSA_SINK (asink);

  if (alsa->iec958) {
    snd_pcm_close (alsa->handle);
    alsa->handle = gst_alsa_open_iec958_pcm (GST_OBJECT (alsa), alsa->device);
    if (G_UNLIKELY (!alsa->handle)) {
      goto no_iec958;
    }
  }

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

  CHECK (set_hwparams (alsa), hw_params_failed);
  CHECK (set_swparams (alsa), sw_params_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_SINK
            (alsa)->ringbuffer, pos);
    }
    free (chmap);
  }
#endif /* SND_CHMAP_API_VERSION */

  return TRUE;

  /* ERRORS */
no_iec958:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, OPEN_WRITE, (NULL),
        ("Could not open IEC958 (SPDIF) device for playback"));
    return FALSE;
  }
spec_parse:
  {
    GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
        ("Error parsing spec"));
    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;
  }
}