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ac3parse: correctly handle timestamps when parsing x-private1-ac3

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... the way it has always worked fine in a52dec.
This commit is contained in:
Mark Nauwelaerts 2013-11-11 13:17:25 +01:00
parent b81b2efa3e
commit 49d52a64d6
1 changed files with 68 additions and 9 deletions
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77
gst/audioparsers/gstac3parse.c
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@ -690,24 +690,83 @@ cleanup:
* */
static GstFlowReturn
gst_ac3_parse_chain_priv (GstPad * pad, GstObject * parent, GstBuffer * buffer)
gst_ac3_parse_chain_priv (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstAc3Parse *ac3parse = GST_AC3_PARSE (parent);
GstFlowReturn ret;
GstBuffer *newbuf;
gsize size;
guint8 data[2];
gint offset;
gint len;
GstBuffer *subbuf;
gint first_access;
size = gst_buffer_get_size (buffer);
if (size >= 2) {
newbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 2, size - 2);
gst_buffer_unref (buffer);
ret = ac3parse->baseparse_chainfunc (pad, parent, newbuf);
size = gst_buffer_get_size (buf);
if (size < 2)
goto not_enough_data;
gst_buffer_extract (buf, 0, data, 2);
first_access = (data[0] << 8) | data[1];
/* Skip the first_access header */
offset = 2;
if (first_access > 1) {
/* Length of data before first_access */
len = first_access - 1;
if (len <= 0 || offset + len > size)
goto bad_first_access_parameter;
subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset, len);
GST_BUFFER_DTS (subbuf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_PTS (subbuf) = GST_CLOCK_TIME_NONE;
ret = ac3parse->baseparse_chainfunc (pad, parent, subbuf);
if (ret != GST_FLOW_OK) {
gst_buffer_unref (buf);
goto done;
}
offset += len;
len = size - offset;
if (len > 0) {
subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset, len);
GST_BUFFER_PTS (subbuf) = GST_BUFFER_PTS (buf);
GST_BUFFER_DTS (subbuf) = GST_BUFFER_DTS (buf);
ret = ac3parse->baseparse_chainfunc (pad, parent, subbuf);
}
gst_buffer_unref (buf);
} else {
gst_buffer_unref (buffer);
ret = GST_FLOW_OK;
/* first_access = 0 or 1, so if there's a timestamp it applies to the first byte */
subbuf =
gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset,
size - offset);
GST_BUFFER_PTS (subbuf) = GST_BUFFER_PTS (buf);
GST_BUFFER_DTS (subbuf) = GST_BUFFER_DTS (buf);
gst_buffer_unref (buf);
ret = ac3parse->baseparse_chainfunc (pad, parent, subbuf);
}
done:
return ret;
/* ERRORS */
not_enough_data:
{
GST_ELEMENT_ERROR (GST_ELEMENT (ac3parse), STREAM, FORMAT, (NULL),
("Insufficient data in buffer. Can't determine first_acess"));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
bad_first_access_parameter:
{
GST_ELEMENT_ERROR (GST_ELEMENT (ac3parse), STREAM, FORMAT, (NULL),
("Bad first_access parameter (%d) in buffer", first_access));
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static gboolean