Ejemplos de gst_byte_reader_peek_uint16_be en C++ (Cpp)

Ejemplo n.º 1

Archivo: gstjpegparse.c Proyecto: drothlis/gst-plugins-bad

static inline gboolean
gst_jpeg_parse_remove_marker (GstJpegParse * parse,
    GstByteReader * reader, guint8 marker, GstBuffer * buffer)
{
  guint16 size = 0;
  guint pos = gst_byte_reader_get_pos (reader);
  guint8 *data;
  gsize bsize;

  if (!gst_byte_reader_peek_uint16_be (reader, &size))
    return FALSE;
  if (gst_byte_reader_get_remaining (reader) < size)
    return FALSE;

  GST_LOG_OBJECT (parse, "unhandled marker %x removing %u bytes", marker, size);

  data = gst_buffer_map (buffer, &bsize, NULL, GST_MAP_READWRITE);
  memmove (&data[pos], &data[pos + size], bsize - (pos + size));
  gst_buffer_unmap (buffer, data, bsize - size);

  if (!gst_byte_reader_set_pos (reader, pos - size))
    return FALSE;

  return TRUE;
}

Ejemplo n.º 2

Archivo: gstjpegparse.c Proyecto: ChinnaSuhas/ossbuild

static inline gboolean
gst_jpeg_parse_remove_marker (GstJpegParse * parse,
    GstByteReader * reader, guint8 marker, GstBuffer * buffer)
{
  guint16 size = 0;
  guint pos = gst_byte_reader_get_pos (reader);
  guint8 *data = GST_BUFFER_DATA (buffer);

  if (!gst_byte_reader_peek_uint16_be (reader, &size))
    return FALSE;
  if (gst_byte_reader_get_remaining (reader) < size)
    return FALSE;

  GST_LOG_OBJECT (parse, "unhandled marker %x removing %u bytes", marker, size);

  memmove (&data[pos], &data[pos + size],
      GST_BUFFER_SIZE (buffer) - (pos + size));
  GST_BUFFER_SIZE (buffer) -= size;

  if (!gst_byte_reader_set_pos (reader, pos - size))
    return FALSE;

  return TRUE;
}

Ejemplo n.º 3

Archivo: gstexiftag.c Proyecto: genesi/gst-base-plugins

static gint
deserialize_speed (GstExifReader * exif_reader,
    GstByteReader * reader, const GstExifTagMatch * exiftag,
    GstExifTagData * tagdata)
{
  GstExifTagData next_tagdata = { 0, };
  gdouble multiplier = 1;
  gint ret = 0;

  GST_LOG ("Starting to parse %s tag in exif 0x%x", exiftag->gst_tag,
      exiftag->exif_tag);

  if (exiftag->complementary_tag == tagdata->tag) {
    if (tagdata->offset_as_data[0] == 'K') {
      multiplier = KILOMETERS_PER_HOUR_TO_METERS_PER_SECOND;
    } else if (tagdata->offset_as_data[0] == 'M') {
      multiplier = MILES_PER_HOUR_TO_METERS_PER_SECOND;
    } else if (tagdata->offset_as_data[0] == 'N') {
      multiplier = KNOTS_TO_METERS_PER_SECOND;
    } else {
      GST_WARNING ("Invalid GPSSpeedRed %c", tagdata->offset_as_data[0]);
      return ret;
    }
  } else {
    GST_DEBUG ("No GPSSpeedRef, using default=K");
    multiplier = KILOMETERS_PER_HOUR_TO_METERS_PER_SECOND;

    if (tagdata->tag == exiftag->exif_tag) {
      tagdata_copy (&next_tagdata, tagdata);
    }
  }

  /* now read the following tag that must be the exif_tag */
  if (next_tagdata.tag == 0) {
    if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
      if (!gst_byte_reader_peek_uint16_le (reader, &next_tagdata.tag))
        goto reader_fail;
    } else {
      if (!gst_byte_reader_peek_uint16_be (reader, &next_tagdata.tag))
        goto reader_fail;
    }

    if (exiftag->exif_tag != next_tagdata.tag) {
      GST_WARNING ("Unexpected tag");
      return ret;
    }

    /* read the remaining tag entry data */
    if (!parse_exif_tag_header (reader, exif_reader->byte_order, &next_tagdata)) {
      ret = -1;
      goto reader_fail;
    }
    ret = 1;
  }


  /* some checking */
  if (next_tagdata.tag_type != EXIF_TYPE_RATIONAL) {
    GST_WARNING ("Invalid type %d for 0x%x", next_tagdata.tag_type,
        next_tagdata.tag);
    return ret;
  }
  if (next_tagdata.count != 1) {
    GST_WARNING ("0x%x tag must have a single fraction, we have %u",
        next_tagdata.tag_type, next_tagdata.count);
    return ret;
  }

  parse_exif_rational_tag (exif_reader,
      exiftag->gst_tag, next_tagdata.count, next_tagdata.offset, multiplier);

  return ret;

reader_fail:
  GST_WARNING ("Failed to read fields from buffer (too short?)");
  return ret;
}

Ejemplo n.º 4

Archivo: gstexiftag.c Proyecto: genesi/gst-base-plugins

static gint
deserialize_geo_direction (GstExifReader * exif_reader,
    GstByteReader * reader, const GstExifTagMatch * exiftag,
    GstExifTagData * tagdata)
{
  GstExifTagData next_tagdata = { 0, };
  gint ret = 0;

  GST_LOG ("Starting to parse %s tag in exif 0x%x", exiftag->gst_tag,
      exiftag->exif_tag);

  if (exiftag->complementary_tag == tagdata->tag) {
    /* First should come the 'Ref' tags */
    if (tagdata->offset_as_data[0] == 'M') {
      GST_WARNING ("Magnetic direction is not supported");
      return ret;
    } else if (tagdata->offset_as_data[0] == 'T') {
      /* nop */
    } else {
      GST_WARNING ("Invalid Ref for direction or track %c",
          tagdata->offset_as_data[0]);
      return ret;
    }
  } else {
    GST_DEBUG ("No Direction Ref, using default=T");
    if (tagdata->tag == exiftag->exif_tag) {
      /* this is the main tag */
      tagdata_copy (&next_tagdata, tagdata);
    }
  }

  if (next_tagdata.tag == 0) {
    /* now read the following tag that must be the exif_tag */
    if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
      if (!gst_byte_reader_peek_uint16_le (reader, &next_tagdata.tag))
        goto reader_fail;
    } else {
      if (!gst_byte_reader_peek_uint16_be (reader, &next_tagdata.tag))
        goto reader_fail;
    }

    if (exiftag->exif_tag != next_tagdata.tag) {
      GST_WARNING ("Unexpected tag");
      return ret;
    }

    /* read the remaining tag entry data */
    if (!parse_exif_tag_header (reader, exif_reader->byte_order, &next_tagdata)) {
      ret = -1;
      goto reader_fail;
    }
    ret = 1;
  }

  /* some checking */
  if (next_tagdata.tag_type != EXIF_TYPE_RATIONAL) {
    GST_WARNING ("Invalid type %d for 0x%x", next_tagdata.tag_type,
        next_tagdata.tag);
    return ret;
  }
  if (next_tagdata.count != 1) {
    GST_WARNING ("0x%x tag must have a single fraction, we have %u",
        next_tagdata.tag_type, next_tagdata.count);
    return ret;
  }

  parse_exif_rational_tag (exif_reader,
      exiftag->gst_tag, next_tagdata.count, next_tagdata.offset, 1);

  return ret;

reader_fail:
  GST_WARNING ("Failed to read fields from buffer (too short?)");
  return ret;
}

Ejemplo n.º 5

Archivo: gstexiftag.c Proyecto: genesi/gst-base-plugins

static gint
deserialize_geo_coordinate (GstExifReader * exif_reader,
    GstByteReader * reader, const GstExifTagMatch * exiftag,
    GstExifTagData * tagdata)
{
  GstByteReader fractions_reader;
  gint multiplier;
  GstExifTagData next_tagdata;
  gint ret = 0;
  /* for the conversion */
  guint32 degrees_n = 0;
  guint32 degrees_d = 1;
  guint32 minutes_n = 0;
  guint32 minutes_d = 1;
  guint32 seconds_n = 0;
  guint32 seconds_d = 1;
  gdouble degrees;
  gdouble minutes;
  gdouble seconds;

  GST_LOG ("Starting to parse %s tag in exif 0x%x", exiftag->gst_tag,
      exiftag->exif_tag);

  if (exiftag->complementary_tag != tagdata->tag) {
    /* First should come the 'Ref' tags */
    GST_WARNING ("Tag %d is not the 'Ref' tag for latitude nor longitude",
        tagdata->tag);
    return ret;
  }

  if (tagdata->offset_as_data[0] == 'N' || tagdata->offset_as_data[0] == 'E') {
    multiplier = 1;
  } else if (tagdata->offset_as_data[0] == 'S'
      || tagdata->offset_as_data[0] == 'W') {
    multiplier = -1;
  } else {
    GST_WARNING ("Invalid LatitudeRef or LongitudeRef %c",
        tagdata->offset_as_data[0]);
    return ret;
  }

  /* now read the following tag that must be the latitude or longitude */
  if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
    if (!gst_byte_reader_peek_uint16_le (reader, &next_tagdata.tag))
      goto reader_fail;
  } else {
    if (!gst_byte_reader_peek_uint16_be (reader, &next_tagdata.tag))
      goto reader_fail;
  }

  if (exiftag->exif_tag != next_tagdata.tag) {
    GST_WARNING ("This is not a geo cordinate tag");
    return ret;
  }

  /* read the remaining tag entry data */
  if (!parse_exif_tag_header (reader, exif_reader->byte_order, &next_tagdata)) {
    ret = -1;
    goto reader_fail;
  }

  ret = 1;

  /* some checking */
  if (next_tagdata.tag_type != EXIF_TYPE_RATIONAL) {
    GST_WARNING ("Invalid type %d for geo coordinate (latitude/longitude)",
        next_tagdata.tag_type);
    return ret;
  }
  if (next_tagdata.count != 3) {
    GST_WARNING ("Geo coordinate should use 3 fractions, we have %u",
        next_tagdata.count);
    return ret;
  }

  /* now parse the fractions */
  gst_byte_reader_init_from_buffer (&fractions_reader, exif_reader->buffer);
  if (!gst_byte_reader_set_pos (&fractions_reader,
          next_tagdata.offset - exif_reader->base_offset))
    goto reader_fail;

  if (exif_reader->byte_order == G_LITTLE_ENDIAN) {
    if (!gst_byte_reader_get_uint32_le (&fractions_reader, &degrees_n) ||
        !gst_byte_reader_get_uint32_le (&fractions_reader, &degrees_d) ||
        !gst_byte_reader_get_uint32_le (&fractions_reader, &minutes_n) ||
        !gst_byte_reader_get_uint32_le (&fractions_reader, &minutes_d) ||
        !gst_byte_reader_get_uint32_le (&fractions_reader, &seconds_n) ||
        !gst_byte_reader_get_uint32_le (&fractions_reader, &seconds_d))
      goto reader_fail;
  } else {
    if (!gst_byte_reader_get_uint32_be (&fractions_reader, &degrees_n) ||
        !gst_byte_reader_get_uint32_be (&fractions_reader, &degrees_d) ||
        !gst_byte_reader_get_uint32_be (&fractions_reader, &minutes_n) ||
        !gst_byte_reader_get_uint32_be (&fractions_reader, &minutes_d) ||
        !gst_byte_reader_get_uint32_be (&fractions_reader, &seconds_n) ||
        !gst_byte_reader_get_uint32_be (&fractions_reader, &seconds_d))
      goto reader_fail;
  }

  GST_DEBUG ("Read degrees fraction for tag %s: %u/%u %u/%u %u/%u",
      exiftag->gst_tag, degrees_n, degrees_d, minutes_n, minutes_d,
      seconds_n, seconds_d);

  gst_util_fraction_to_double (degrees_n, degrees_d, &degrees);
  gst_util_fraction_to_double (minutes_n, minutes_d, &minutes);
  gst_util_fraction_to_double (seconds_n, seconds_d, &seconds);

  minutes += seconds / 60;
  degrees += minutes / 60;
  degrees *= multiplier;

  GST_DEBUG ("Adding %s tag: %lf", exiftag->gst_tag, degrees);
  gst_tag_list_add (exif_reader->taglist, GST_TAG_MERGE_REPLACE,
      exiftag->gst_tag, degrees, NULL);

  return ret;

reader_fail:
  GST_WARNING ("Failed to read fields from buffer (too short?)");
  return ret;
}