Пример #1
0
/* dump information from a jasper image struct for debugging */
static int
dump_jas_image(jas_image_t *image)
{
    int i, numcmpts = jas_image_numcmpts(image);
    int clrspc = jas_image_clrspc(image);
    const char *csname = "unrecognized vendor space";

    if (image == NULL) return 1;

    if_debug2('w', "[w]JPX image is %d x %d\n",
        (int)jas_image_width(image), (int)jas_image_height(image));

    /* sort the colorspace */
    if jas_clrspc_isunknown(clrspc) csname = "unknown";
    else switch (clrspc) {
Пример #2
0
static GstFlowReturn
gst_jasper_dec_negotiate (GstJasperDec * dec, jas_image_t * image)
{
  GstFlowReturn flow_ret = GST_FLOW_OK;
  gint width, height, channels;
  gint i, j;
  gboolean negotiate = FALSE;
  jas_clrspc_t clrspc;
  GstCaps *allowed_caps, *caps;

  width = jas_image_width (image);
  height = jas_image_height (image);
  channels = jas_image_numcmpts (image);

  GST_LOG_OBJECT (dec, "%d x %d, %d components", width, height, channels);

  /* jp2c bitstream has no real colour space info (kept in container),
   * so decoder may only pretend to know, where it really does not */
  if (!jas_clrspc_isunknown (dec->clrspc)) {
    clrspc = dec->clrspc;
    GST_DEBUG_OBJECT (dec, "forcing container supplied colour space %d",
        clrspc);
    jas_image_setclrspc (image, clrspc);
  } else
    clrspc = jas_image_clrspc (image);

  if (!width || !height || !channels || jas_clrspc_isunknown (clrspc))
    goto fail_image;

  if (dec->width != width || dec->height != height ||
      dec->channels != channels || dec->clrspc != clrspc)
    negotiate = TRUE;

  if (channels != 3)
    goto not_supported;

  for (i = 0; i < channels; i++) {
    gint cheight, cwidth, depth, sgnd;

    cheight = jas_image_cmptheight (image, i);
    cwidth = jas_image_cmptwidth (image, i);
    depth = jas_image_cmptprec (image, i);
    sgnd = jas_image_cmptsgnd (image, i);

    GST_LOG_OBJECT (dec, "image component %d, %dx%d, depth %d, sgnd %d", i,
        cwidth, cheight, depth, sgnd);

    if (depth != 8 || sgnd)
      goto not_supported;

    if (dec->cheight[i] != cheight || dec->cwidth[i] != cwidth) {
      dec->cheight[i] = cheight;
      dec->cwidth[i] = cwidth;
      negotiate = TRUE;
    }
  }

  if (!negotiate && dec->format != GST_VIDEO_FORMAT_UNKNOWN)
    goto done;

  /* clear and refresh to new state */
  flow_ret = GST_FLOW_NOT_NEGOTIATED;
  dec->format = GST_VIDEO_FORMAT_UNKNOWN;
  dec->width = width;
  dec->height = height;
  dec->channels = channels;

  /* retrieve allowed caps, and find the first one that reasonably maps
   * to the parameters of the colourspace */
  caps = gst_pad_get_allowed_caps (dec->srcpad);
  if (!caps) {
    GST_DEBUG_OBJECT (dec, "... but no peer, using template caps");
    /* need to copy because get_allowed_caps returns a ref,
       and get_pad_template_caps doesn't */
    caps = gst_caps_copy (gst_pad_get_pad_template_caps (dec->srcpad));
  }
  /* avoid lists of fourcc, etc */
  allowed_caps = gst_caps_normalize (caps);
  caps = NULL;
  GST_LOG_OBJECT (dec, "allowed source caps %" GST_PTR_FORMAT, allowed_caps);

  for (i = 0; i < gst_caps_get_size (allowed_caps); i++) {
    GstVideoFormat format;
    gboolean ok;

    if (caps)
      gst_caps_unref (caps);
    caps = gst_caps_copy_nth (allowed_caps, i);
    /* sigh, ds and _parse_caps need fixed caps for parsing, fixate */
    gst_pad_fixate_caps (dec->srcpad, caps);
    GST_LOG_OBJECT (dec, "checking caps %" GST_PTR_FORMAT, caps);
    if (!gst_video_format_parse_caps (caps, &format, NULL, NULL))
      continue;
    if (gst_video_format_is_rgb (format) &&
        jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_RGB) {
      GST_DEBUG_OBJECT (dec, "trying RGB");
      if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
          (dec->cmpt[1] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
          (dec->cmpt[2] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
        GST_DEBUG_OBJECT (dec, "missing RGB color component");
        continue;
      }
    } else if (gst_video_format_is_yuv (format) &&
        jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_YCBCR) {
      GST_DEBUG_OBJECT (dec, "trying YUV");
      if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_Y))) < 0 ||
          (dec->cmpt[1] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CB))) < 0 ||
          (dec->cmpt[2] = jas_image_getcmptbytype (image,
                  JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CR))) < 0) {
        GST_DEBUG_OBJECT (dec, "missing YUV color component");
        continue;
      }
    } else
      continue;
    /* match format with validity checks */
    ok = TRUE;
    for (j = 0; j < channels; j++) {
      gint cmpt;

      cmpt = dec->cmpt[j];
      if (dec->cwidth[cmpt] != gst_video_format_get_component_width (format, j,
              width) ||
          dec->cheight[cmpt] != gst_video_format_get_component_height (format,
              j, height))
        ok = FALSE;
    }
    /* commit to this format */
    if (ok) {
      dec->format = format;
      break;
    }
  }

  if (caps)
    gst_caps_unref (caps);
  gst_caps_unref (allowed_caps);

  if (dec->format != GST_VIDEO_FORMAT_UNKNOWN) {
    /* cache some video format properties */
    for (j = 0; j < channels; ++j) {
      dec->offset[j] = gst_video_format_get_component_offset (dec->format, j,
          dec->width, dec->height);
      dec->inc[j] = gst_video_format_get_pixel_stride (dec->format, j);
      dec->stride[j] = gst_video_format_get_row_stride (dec->format, j,
          dec->width);
    }
    dec->image_size = gst_video_format_get_size (dec->format, width, height);
    dec->alpha = gst_video_format_has_alpha (dec->format);

    if (dec->buf)
      g_free (dec->buf);
    dec->buf = g_new0 (glong, dec->width);

    caps = gst_video_format_new_caps (dec->format, dec->width, dec->height,
        dec->framerate_numerator, dec->framerate_denominator, 1, 1);

    GST_DEBUG_OBJECT (dec, "Set format to %d, size to %dx%d", dec->format,
        dec->width, dec->height);

    if (!gst_pad_set_caps (dec->srcpad, caps))
      flow_ret = GST_FLOW_NOT_NEGOTIATED;
    else
      flow_ret = GST_FLOW_OK;

    gst_caps_unref (caps);
  }

done:
  return flow_ret;

  /* ERRORS */
fail_image:
  {
    GST_DEBUG_OBJECT (dec, "Failed to process decoded image.");
    flow_ret = GST_FLOW_NOT_NEGOTIATED;
    goto done;
  }
not_supported:
  {
    GST_DEBUG_OBJECT (dec, "Decoded image has unsupported colour space.");
    GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Unsupported colorspace"));
    flow_ret = GST_FLOW_ERROR;
    goto done;
  }
}