static ImageDescription *
image_description_from_stsd_buffer (GstBuffer * buf)
{
ImageDescription *desc = NULL;
guint8 *content;
guint size;
gint imds;
GST_LOG ("buffer %p, size:%u", buf, GST_BUFFER_SIZE (buf));
/* The buffer contains a full atom, we only need the contents */
/* This buffer has data in big-endian, we need to read it as such.
* except for the fourcc which are ALWAYS big-endian. */
content = GST_BUFFER_DATA (buf) + 16;
size = GST_BUFFER_SIZE (buf) - 16;
#if DEBUG_DUMP
GST_LOG ("incoming data in big-endian");
gst_util_dump_mem (content, size);
#endif
desc = g_malloc0 (size);
desc->idSize = size;
desc->cType = GST_READ_UINT32_BE (content + 4);
desc->version = QT_UINT16 (content + 16);
desc->revisionLevel = QT_UINT16 (content + 18);
desc->vendor = GST_READ_UINT32_BE (content + 20);
desc->temporalQuality = QT_UINT32 (content + 24);
desc->spatialQuality = QT_UINT32 (content + 24);
desc->dataSize = QT_UINT32 (content + 44);
desc->frameCount = QT_UINT16 (content + 48);
desc->depth = QT_UINT16 (content + 82);
desc->clutID = QT_UINT16 (content + 84);
imds = 86; /* sizeof (ImageDescription); */
if (desc->idSize > imds) {
GST_LOG ("Copying %d bytes from %p to %p",
size - imds, content + imds, desc + imds);
memcpy ((guint8 *) desc + imds, (guint8 *) content + imds, size - imds);
}
#if DEBUG_DUMP
GST_LOG ("outgoing data in machine-endian");
dump_image_description (desc);
#endif
return desc;
}
static gboolean
gst_rtp_quicktime_parse_sd (GstRtpXQTDepay * rtpxqtdepay, guint8 * data,
guint data_len)
{
gint len;
guint32 fourcc;
if (data_len < 8)
goto too_short;
len = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
if (len > data_len)
goto too_short;
fourcc = QT_FOURCC (data + 4);
GST_DEBUG_OBJECT (rtpxqtdepay, "parsing %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (fourcc));
switch (fourcc) {
case FOURCC_avc1:
{
guint32 chlen;
if (len < 0x56)
goto too_short;
len -= 0x56;
data += 0x56;
/* find avcC */
while (len >= 8) {
chlen = QT_UINT32 (data);
fourcc = QT_FOURCC (data + 4);
if (fourcc == FOURCC_avcC) {
GstBuffer *buf;
gint size;
GstCaps *caps;
GST_DEBUG_OBJECT (rtpxqtdepay, "found avcC codec_data in sd, %u",
chlen);
/* parse, if found */
if (chlen < len)
size = chlen - 8;
else
size = len - 8;
buf = gst_buffer_new_and_alloc (size);
gst_buffer_fill (buf, 0, data + 8, size);
caps = gst_caps_new_simple ("video/x-h264",
"codec_data", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_unref (buf);
gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD (rtpxqtdepay)->srcpad, caps);
gst_caps_unref (caps);
break;
}
len -= chlen;
data += chlen;
}
break;
}
default:
break;
}
return TRUE;
/* ERRORS */
too_short:
{
return FALSE;
}
}