/** * gst_rtp_buffer_allocate_data: * @buffer: a #GstBuffer * @payload_len: the length of the payload * @pad_len: the amount of padding * @csrc_count: the number of CSRC entries * * Allocate enough data in @buffer to hold an RTP packet with @csrc_count CSRCs, * a payload length of @payload_len and padding of @pad_len. * MALLOCDATA of @buffer will be overwritten and will not be freed. * All other RTP header fields will be set to 0/FALSE. */ void gst_rtp_buffer_allocate_data (GstBuffer * buffer, guint payload_len, guint8 pad_len, guint8 csrc_count) { guint len; guint8 *data; g_return_if_fail (csrc_count <= 15); g_return_if_fail (GST_IS_BUFFER (buffer)); len = GST_RTP_HEADER_LEN + csrc_count * sizeof (guint32) + payload_len + pad_len; data = g_malloc (len); GST_BUFFER_MALLOCDATA (buffer) = data; GST_BUFFER_DATA (buffer) = data; GST_BUFFER_SIZE (buffer) = len; /* fill in defaults */ GST_RTP_HEADER_VERSION (data) = GST_RTP_VERSION; GST_RTP_HEADER_PADDING (data) = FALSE; GST_RTP_HEADER_EXTENSION (data) = FALSE; GST_RTP_HEADER_CSRC_COUNT (data) = csrc_count; memset (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, 0), 0, csrc_count * sizeof (guint32)); GST_RTP_HEADER_MARKER (data) = FALSE; GST_RTP_HEADER_PAYLOAD_TYPE (data) = 0; GST_RTP_HEADER_SEQ (data) = 0; GST_RTP_HEADER_TIMESTAMP (data) = 0; GST_RTP_HEADER_SSRC (data) = 0; }
/** * gst_rtp_buffer_set_csrc: * @buffer: the buffer * @idx: the CSRC index to set * @csrc: the CSRC in host order to set at @idx * * Modify the CSRC at index @idx in @buffer to @csrc. */ void gst_rtp_buffer_set_csrc (GstBuffer * buffer, guint8 idx, guint32 csrc) { guint8 *data; data = GST_BUFFER_DATA (buffer); g_return_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (data)); GST_WRITE_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, idx), csrc); }
/** * gst_rtp_buffer_get_csrc: * @buffer: the buffer * @idx: the index of the CSRC to get * * Get the CSRC at index @idx in @buffer. * * Returns: the CSRC at index @idx in host order. */ guint32 gst_rtp_buffer_get_csrc (GstBuffer * buffer, guint8 idx) { guint8 *data; data = GST_BUFFER_DATA (buffer); g_return_val_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (data), 0); return GST_READ_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (data, idx)); }
EXPORT_C #endif void gst_rtp_buffer_set_csrc (GstBuffer * buffer, guint8 idx, guint32 csrc) { g_return_if_fail (GST_IS_BUFFER (buffer)); g_return_if_fail (GST_BUFFER_DATA (buffer) != NULL); g_return_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (buffer)); GST_WRITE_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (buffer, idx), csrc); }
EXPORT_C #endif guint32 gst_rtp_buffer_get_csrc (GstBuffer * buffer, guint8 idx) { g_return_val_if_fail (GST_IS_BUFFER (buffer), 0); g_return_val_if_fail (GST_BUFFER_DATA (buffer) != NULL, 0); g_return_val_if_fail (idx < GST_RTP_HEADER_CSRC_COUNT (buffer), 0); return GST_READ_UINT32_BE (GST_RTP_HEADER_CSRC_LIST_OFFSET (buffer, idx)); }