예제 #1
0
static GstCaps *
gst_video_test_src_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
  GstStructure *structure;

  caps = gst_caps_make_writable (caps);

  structure = gst_caps_get_structure (caps, 0);

  gst_structure_fixate_field_nearest_int (structure, "width", 320);
  gst_structure_fixate_field_nearest_int (structure, "height", 240);
  gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
  if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
    gst_structure_fixate_field_nearest_fraction (structure,
        "pixel-aspect-ratio", 1, 1);
  if (gst_structure_has_field (structure, "colorimetry"))
    gst_structure_fixate_field_string (structure, "colorimetry", "bt601");
  if (gst_structure_has_field (structure, "chroma-site"))
    gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");

  if (gst_structure_has_field (structure, "interlace-mode"))
    gst_structure_fixate_field_string (structure, "interlace-mode",
        "progressive");

  caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);

  return caps;
}
예제 #2
0
static GstCaps *
gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
  GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
  GstStructure *structure;

  GST_DEBUG_OBJECT (intervideosrc, "fixate");

  caps = gst_caps_make_writable (caps);

  structure = gst_caps_get_structure (caps, 0);

  gst_structure_fixate_field_nearest_int (structure, "width", 320);
  gst_structure_fixate_field_nearest_int (structure, "height", 240);
  gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
  if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
    gst_structure_fixate_field_nearest_fraction (structure,
        "pixel-aspect-ratio", 1, 1);
  if (gst_structure_has_field (structure, "color-matrix"))
    gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
  if (gst_structure_has_field (structure, "chroma-site"))
    gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");

  if (gst_structure_has_field (structure, "interlaced"))
    gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);

  return caps;
}
예제 #3
0
static GstCaps *
gst_ladspa_source_type_fixate (GstBaseSrc * base, GstCaps * caps)
{
  GstLADSPASource *ladspa = GST_LADSPA_SOURCE (base);
  GstStructure *structure;

  caps = gst_caps_make_writable (caps);

  structure = gst_caps_get_structure (caps, 0);

  GST_DEBUG_OBJECT (ladspa, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_nearest_int (structure, "rate",
      GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (F32));

  gst_structure_fixate_field_nearest_int (structure, "channels",
      ladspa->ladspa.klass->count.audio.out);

  caps =
      GST_BASE_SRC_CLASS (gst_ladspa_source_type_parent_class)->fixate
      (base, caps);

  return caps;
}
예제 #4
0
static GstCaps *
gst_inter_audio_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
  GstStructure *structure;

  GST_DEBUG_OBJECT (src, "fixate");

  caps = gst_caps_make_writable (caps);
  caps = gst_caps_truncate (caps);

  structure = gst_caps_get_structure (caps, 0);

  gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (S16));
  gst_structure_fixate_field_nearest_int (structure, "channels", 2);
  gst_structure_fixate_field_nearest_int (structure, "rate", 48000);
  gst_structure_fixate_field_string (structure, "layout", "interleaved");

  return caps;
}
예제 #5
0
static GstCaps *
gst_lv2_source_fixate (GstBaseSrc * base, GstCaps * caps)
{
  GstLV2Source *lv2 = (GstLV2Source *) base;
  GstStructure *structure;

  caps = gst_caps_make_writable (caps);

  structure = gst_caps_get_structure (caps, 0);

  GST_DEBUG_OBJECT (lv2, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_nearest_int (structure, "rate",
      GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (F32));

  gst_structure_fixate_field_nearest_int (structure, "channels",
      lv2->lv2.klass->out_group.ports->len);

  caps = GST_BASE_SRC_CLASS (parent_class)->fixate (base, caps);

  return caps;
}
예제 #6
0
static GstCaps *
gst_audio_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
  GstAudioTestSrc *src = GST_AUDIO_TEST_SRC (bsrc);
  GstStructure *structure;

  caps = gst_caps_make_writable (caps);

  structure = gst_caps_get_structure (caps, 0);

  GST_DEBUG_OBJECT (src, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_nearest_int (structure, "rate",
      GST_AUDIO_DEF_RATE);

  gst_structure_fixate_field_string (structure, "format", DEFAULT_FORMAT_STR);

  /* fixate to mono unless downstream requires stereo, for backwards compat */
  gst_structure_fixate_field_nearest_int (structure, "channels", 1);

  caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);

  return caps;
}
예제 #7
0
static gboolean
gst_rtp_opus_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
{
  gboolean res;
  GstCaps *src_caps;
  GstStructure *s;
  char *encoding_name;
  gint channels, rate;
  const char *sprop_stereo = NULL;
  char *sprop_maxcapturerate = NULL;

  src_caps = gst_pad_get_allowed_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
  if (src_caps) {
    src_caps = gst_caps_make_writable (src_caps);
    src_caps = gst_caps_truncate (src_caps);
    s = gst_caps_get_structure (src_caps, 0);
    gst_structure_fixate_field_string (s, "encoding-name", "OPUS");
    encoding_name = g_strdup (gst_structure_get_string (s, "encoding-name"));
    gst_caps_unref (src_caps);
  } else {
    encoding_name = g_strdup ("X-GST-OPUS-DRAFT-SPITTKA-00");
  }

  s = gst_caps_get_structure (caps, 0);
  if (gst_structure_get_int (s, "channels", &channels)) {
    if (channels > 2) {
      GST_ERROR_OBJECT (payload,
          "More than 2 channels with channel-mapping-family=0 is invalid");
      return FALSE;
    } else if (channels == 2) {
      sprop_stereo = "1";
    } else {
      sprop_stereo = "0";
    }
  }

  if (gst_structure_get_int (s, "rate", &rate)) {
    sprop_maxcapturerate = g_strdup_printf ("%d", rate);
  }

  gst_rtp_base_payload_set_options (payload, "audio", FALSE,
      encoding_name, 48000);
  g_free (encoding_name);

  if (sprop_maxcapturerate && sprop_stereo) {
    res =
        gst_rtp_base_payload_set_outcaps (payload, "sprop-maxcapturerate",
        G_TYPE_STRING, sprop_maxcapturerate, "sprop-stereo", G_TYPE_STRING,
        sprop_stereo, NULL);
  } else if (sprop_maxcapturerate) {
    res =
        gst_rtp_base_payload_set_outcaps (payload, "sprop-maxcapturerate",
        G_TYPE_STRING, sprop_maxcapturerate, NULL);
  } else if (sprop_stereo) {
    res =
        gst_rtp_base_payload_set_outcaps (payload, "sprop-stereo",
        G_TYPE_STRING, sprop_stereo, NULL);
  } else {
    res = gst_rtp_base_payload_set_outcaps (payload, NULL);
  }

  g_free (sprop_maxcapturerate);

  return res;
}
예제 #8
0
static gboolean
gst_sbc_enc_set_format (GstAudioEncoder * audio_enc, GstAudioInfo * info)
{
  const gchar *allocation_method, *channel_mode;
  GstSbcEnc *enc = GST_SBC_ENC (audio_enc);
  GstStructure *s;
  GstCaps *caps, *filter_caps;
  GstCaps *output_caps = NULL;
  guint sampleframes_per_frame;

  enc->rate = GST_AUDIO_INFO_RATE (info);
  enc->channels = GST_AUDIO_INFO_CHANNELS (info);

  /* negotiate output format based on downstream caps restrictions */
  caps = gst_pad_get_allowed_caps (GST_AUDIO_ENCODER_SRC_PAD (enc));
  if (caps == GST_CAPS_NONE || gst_caps_is_empty (caps))
    goto failure;

  if (caps == NULL)
    caps = gst_static_pad_template_get_caps (&sbc_enc_src_factory);

  /* fixate output caps */
  filter_caps = gst_caps_new_simple ("audio/x-sbc", "rate", G_TYPE_INT,
      enc->rate, "channels", G_TYPE_INT, enc->channels, NULL);
  output_caps = gst_caps_intersect (caps, filter_caps);
  gst_caps_unref (filter_caps);

  if (output_caps == NULL || gst_caps_is_empty (output_caps)) {
    GST_WARNING_OBJECT (enc, "Couldn't negotiate output caps with input rate "
        "%d and input channels %d and allowed output caps %" GST_PTR_FORMAT,
        enc->rate, enc->channels, caps);
    goto failure;
  }

  gst_caps_unref (caps);
  caps = NULL;

  GST_DEBUG_OBJECT (enc, "fixating caps %" GST_PTR_FORMAT, output_caps);
  output_caps = gst_caps_truncate (output_caps);
  s = gst_caps_get_structure (output_caps, 0);
  if (enc->channels == 1)
    gst_structure_fixate_field_string (s, "channel-mode", "mono");
  else
    gst_structure_fixate_field_string (s, "channel-mode", "joint");

  gst_structure_fixate_field_nearest_int (s, "bitpool", 64);
  gst_structure_fixate_field_nearest_int (s, "blocks", 16);
  gst_structure_fixate_field_nearest_int (s, "subbands", 8);
  gst_structure_fixate_field_string (s, "allocation-method", "loudness");
  s = NULL;

  /* in case there's anything else left to fixate */
  output_caps = gst_caps_fixate (output_caps);
  gst_caps_set_simple (output_caps, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);

  GST_INFO_OBJECT (enc, "output caps %" GST_PTR_FORMAT, output_caps);

  /* let's see what we fixated to */
  s = gst_caps_get_structure (output_caps, 0);
  gst_structure_get_int (s, "blocks", &enc->blocks);
  gst_structure_get_int (s, "subbands", &enc->subbands);
  gst_structure_get_int (s, "bitpool", &enc->bitpool);
  allocation_method = gst_structure_get_string (s, "allocation-method");
  channel_mode = gst_structure_get_string (s, "channel-mode");

  /* We want channel-mode and channels coherent */
  if (enc->channels == 1) {
    if (g_strcmp0 (channel_mode, "mono") != 0) {
      GST_ERROR_OBJECT (enc, "Can't have channel-mode '%s' for 1 channel",
          channel_mode);
      goto failure;
    }
  } else {
    if (g_strcmp0 (channel_mode, "joint") != 0 &&
        g_strcmp0 (channel_mode, "stereo") != 0 &&
        g_strcmp0 (channel_mode, "dual") != 0) {
      GST_ERROR_OBJECT (enc, "Can't have channel-mode '%s' for 2 channels",
          channel_mode);
      goto failure;
    }
  }

  /* we want to be handed all available samples in handle_frame, but always
   * enough to encode a frame */
  sampleframes_per_frame = enc->blocks * enc->subbands;
  gst_audio_encoder_set_frame_samples_min (audio_enc, sampleframes_per_frame);
  gst_audio_encoder_set_frame_samples_max (audio_enc, sampleframes_per_frame);
  gst_audio_encoder_set_frame_max (audio_enc, 0);

  /* FIXME: what to do with left-over samples at the end? can we encode them? */
  gst_audio_encoder_set_hard_min (audio_enc, TRUE);

  /* and configure encoder based on the output caps we negotiated */
  if (enc->rate == 16000)
    enc->sbc.frequency = SBC_FREQ_16000;
  else if (enc->rate == 32000)
    enc->sbc.frequency = SBC_FREQ_32000;
  else if (enc->rate == 44100)
    enc->sbc.frequency = SBC_FREQ_44100;
  else if (enc->rate == 48000)
    enc->sbc.frequency = SBC_FREQ_48000;
  else
    goto failure;

  if (enc->blocks == 4)
    enc->sbc.blocks = SBC_BLK_4;
  else if (enc->blocks == 8)
    enc->sbc.blocks = SBC_BLK_8;
  else if (enc->blocks == 12)
    enc->sbc.blocks = SBC_BLK_12;
  else if (enc->blocks == 16)
    enc->sbc.blocks = SBC_BLK_16;
  else
    goto failure;

  enc->sbc.subbands = (enc->subbands == 4) ? SBC_SB_4 : SBC_SB_8;
  enc->sbc.bitpool = enc->bitpool;

  if (channel_mode == NULL || allocation_method == NULL)
    goto failure;

  if (strcmp (channel_mode, "joint") == 0)
    enc->sbc.mode = SBC_MODE_JOINT_STEREO;
  else if (strcmp (channel_mode, "stereo") == 0)
    enc->sbc.mode = SBC_MODE_STEREO;
  else if (strcmp (channel_mode, "dual") == 0)
    enc->sbc.mode = SBC_MODE_DUAL_CHANNEL;
  else if (strcmp (channel_mode, "mono") == 0)
    enc->sbc.mode = SBC_MODE_MONO;
  else if (strcmp (channel_mode, "auto") == 0)
    enc->sbc.mode = SBC_MODE_JOINT_STEREO;
  else
    goto failure;

  if (strcmp (allocation_method, "loudness") == 0)
    enc->sbc.allocation = SBC_AM_LOUDNESS;
  else if (strcmp (allocation_method, "snr") == 0)
    enc->sbc.allocation = SBC_AM_SNR;
  else
    goto failure;

  if (!gst_audio_encoder_set_output_format (audio_enc, output_caps))
    goto failure;

  return gst_audio_encoder_negotiate (audio_enc);

failure:
  if (output_caps)
    gst_caps_unref (output_caps);
  if (caps)
    gst_caps_unref (caps);
  return FALSE;
}
예제 #9
0
static gboolean
gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
  GstVideoRate *videorate;
  GstStructure *structure;
  gboolean ret = TRUE;
  GstPad *otherpad, *opeer;
  gint rate_numerator, rate_denominator;

  videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));

  GST_DEBUG_OBJECT (pad, "setcaps called %" GST_PTR_FORMAT, caps);

  structure = gst_caps_get_structure (caps, 0);
  if (!gst_structure_get_fraction (structure, "framerate",
          &rate_numerator, &rate_denominator))
    goto no_framerate;

  if (pad == videorate->srcpad) {
    /* out_frame_count is scaled by the frame rate caps when calculating next_ts.
     * when the frame rate caps change, we must update base_ts and reset
     * out_frame_count */
    if (videorate->to_rate_numerator) {
      videorate->base_ts +=
          gst_util_uint64_scale (videorate->out_frame_count,
          videorate->to_rate_denominator * GST_SECOND,
          videorate->to_rate_numerator);
    }
    videorate->out_frame_count = 0;
    videorate->to_rate_numerator = rate_numerator;
    videorate->to_rate_denominator = rate_denominator;
    otherpad = videorate->sinkpad;
  } else {
    videorate->from_rate_numerator = rate_numerator;
    videorate->from_rate_denominator = rate_denominator;
    otherpad = videorate->srcpad;
  }

  /* now try to find something for the peer */
  opeer = gst_pad_get_peer (otherpad);
  if (opeer) {
    if (gst_pad_accept_caps (opeer, caps)) {
      /* the peer accepts the caps as they are */
      gst_pad_set_caps (otherpad, caps);

      ret = TRUE;
    } else {
      GstCaps *peercaps;
      GstCaps *transform = NULL;

      ret = FALSE;

      /* see how we can transform the input caps */
      if (!gst_video_rate_transformcaps (pad, caps, otherpad, &transform))
        goto no_transform;

      /* see what the peer can do */
      peercaps = gst_pad_get_caps (opeer);

      GST_DEBUG_OBJECT (opeer, "icaps %" GST_PTR_FORMAT, peercaps);
      GST_DEBUG_OBJECT (videorate, "transform %" GST_PTR_FORMAT, transform);

      /* filter against our possibilities */
      caps = gst_caps_intersect (peercaps, transform);
      gst_caps_unref (peercaps);
      gst_caps_unref (transform);

      GST_DEBUG_OBJECT (videorate, "intersect %" GST_PTR_FORMAT, caps);

      /* could turn up empty, due to e.g. colorspace etc */
      if (gst_caps_get_size (caps) == 0) {
        gst_caps_unref (caps);
        goto no_transform;
      }

      /* take first possibility */
      gst_caps_truncate (caps);
      structure = gst_caps_get_structure (caps, 0);

      /* and fixate */
      gst_structure_fixate_field_nearest_fraction (structure, "framerate",
          rate_numerator, rate_denominator);

      gst_structure_get_fraction (structure, "framerate",
          &rate_numerator, &rate_denominator);

      if (otherpad == videorate->srcpad) {
        videorate->to_rate_numerator = rate_numerator;
        videorate->to_rate_denominator = rate_denominator;
      } else {
        videorate->from_rate_numerator = rate_numerator;
        videorate->from_rate_denominator = rate_denominator;
      }

      if (gst_structure_has_field (structure, "interlaced"))
        gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
      if (gst_structure_has_field (structure, "color-matrix"))
        gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
      if (gst_structure_has_field (structure, "chroma-site"))
        gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
      if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
        gst_structure_fixate_field_nearest_fraction (structure,
            "pixel-aspect-ratio", 1, 1);

      gst_pad_set_caps (otherpad, caps);
      gst_caps_unref (caps);
      ret = TRUE;
    }
    gst_object_unref (opeer);
  }
done:
  /* After a setcaps, our caps may have changed. In that case, we can't use
   * the old buffer, if there was one (it might have different dimensions) */
  GST_DEBUG_OBJECT (videorate, "swapping old buffers");
  gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);

  gst_object_unref (videorate);
  return ret;

no_framerate:
  {
    GST_DEBUG_OBJECT (videorate, "no framerate specified");
    goto done;
  }
no_transform:
  {
    GST_DEBUG_OBJECT (videorate, "no framerate transform possible");
    ret = FALSE;
    goto done;
  }
}