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rtpasfpay: set padding field to 0 on rtp asf packets

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The ASF RTP spec demands that packets have their padding removed
and the padding size field set to 0 for packets when puting them
inside the RTP packets
This commit is contained in:
Thiago Santos 2009-07-31 00:19:19 -03:00
parent 7583bf6813
commit 88e399aac2
3 changed files with 40 additions and 1 deletions
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10
gst/asfmux/gstasfobjects.c
View file

@ -521,6 +521,7 @@ gst_asf_parse_packet (GstBuffer * buffer, GstAsfPacketInfo * packet,
GstByteReader *reader;
gboolean ret = TRUE;
guint8 first;
guint8 err_length = 0; /* length of the error fields */
guint8 aux;
guint8 packet_len_type;
guint8 padding_len_type;
@ -543,6 +544,7 @@ gst_asf_parse_packet (GstBuffer * buffer, GstAsfPacketInfo * packet,
if (first & 0x80) { /* error correction present */
guint8 err_cor_len;
err_length += 1;
GST_DEBUG ("Packet contains error correction");
if (first & 0x60) {
GST_ERROR ("Error correction data length should be "
@ -550,9 +552,12 @@ gst_asf_parse_packet (GstBuffer * buffer, GstAsfPacketInfo * packet,
return FALSE;
}
err_cor_len = (first & 0x0F);
err_length += err_cor_len;
GST_DEBUG ("Error correction data length: %d", (gint) err_cor_len);
if (!gst_byte_reader_skip (reader, err_cor_len))
goto error;
/* put payload parsing info first byte in aux var */
if (!gst_byte_reader_get_uint8 (reader, &aux))
goto error;
} else {
@ -631,6 +636,11 @@ gst_asf_parse_packet (GstBuffer * buffer, GstAsfPacketInfo * packet,
packet->send_time = send_time;
packet->duration = duration;
packet->has_keyframe = has_keyframe;
packet->multiple_payloads = mult_payloads ? TRUE : FALSE;
packet->padd_field_type = padding_len_type;
packet->packet_field_type = packet_len_type;
packet->seq_field_type = seq_len_type;
packet->err_cor_len = err_length;
gst_byte_reader_free (reader);
return ret;

6
gst/asfmux/gstasfobjects.h
View file

@ -46,6 +46,12 @@ typedef struct _GstAsfFileInfo
typedef struct _GstAsfPacketInfo
{
guint8 err_cor_len;
gboolean multiple_payloads;
guint8 padd_field_type;
guint8 packet_field_type;
guint8 seq_field_type;
guint32 packet_size;
guint32 padding;
guint32 send_time;

25
gst/asfmux/gstrtpasfpay.c
View file

@ -154,7 +154,30 @@ gst_rtp_asf_pay_handle_packet (GstRtpAsfPay * rtpasfpay, GstBuffer * buffer)
", padding: %" G_GUINT32_FORMAT, packetinfo->packet_size,
packetinfo->padding);
/* FIXME - should update the padding field to 0 */
/* update padding field to 0 */
if (packetinfo->padding > 0) {
GstAsfPacketInfo info;
/* find padding field offset */
guint offset = packetinfo->err_cor_len + 2 +
gst_asf_get_var_size_field_len (packetinfo->packet_field_type) +
gst_asf_get_var_size_field_len (packetinfo->seq_field_type);
buffer = gst_buffer_make_writable (buffer);
switch (packetinfo->padd_field_type) {
case ASF_FIELD_TYPE_DWORD:
GST_WRITE_UINT32_LE (&(GST_BUFFER_DATA (buffer)[offset]), 0);
break;
case ASF_FIELD_TYPE_WORD:
GST_WRITE_UINT16_LE (&(GST_BUFFER_DATA (buffer)[offset]), 0);
break;
case ASF_FIELD_TYPE_BYTE:
GST_BUFFER_DATA (buffer)[offset] = 0;
break;
case ASF_FIELD_TYPE_NONE:
default:
break;
}
gst_asf_parse_packet (buffer, &info, FALSE);
}
packet_util_size = packetinfo->packet_size - packetinfo->padding;
packet_offset = 0;