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h264parse: Correctly rewrite all nal prefixes

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When converting to byte-stream do not forget to rewrite
all nal prefixes instead of only the first one.
This commit is contained in:
Thiago Santos 2010-01-12 15:45:14 -03:00
parent 8be4e3725f
commit ba06eddb40
1 changed files with 31 additions and 5 deletions
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36
gst/h264parse/gsth264parse.c
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@ -1384,6 +1384,7 @@ static GstBuffer *
gst_h264parse_write_nal_prefix (GstH264Parse * h264parse, GstBuffer * nal)
{
guint nal_length = h264parse->nal_length_size;
gint i;
g_assert (nal_length <= 4);
@ -1412,15 +1413,40 @@ gst_h264parse_write_nal_prefix (GstH264Parse * h264parse, GstBuffer * nal)
break;
}
} else if (h264parse->format == GST_H264_PARSE_FORMAT_BYTE) {
gint offset = 0;
guint nalu_size = 0;
if (nal_length == 4) {
nal = gst_buffer_make_writable (nal);
GST_WRITE_UINT32_BE (GST_BUFFER_DATA (nal), 0x01);
while (offset + 4 <= GST_BUFFER_SIZE (nal)) {
nalu_size = GST_READ_UINT32_BE (GST_BUFFER_DATA (nal) + offset);
GST_WRITE_UINT32_BE (GST_BUFFER_DATA (nal) + offset, 0x01);
offset += nalu_size + 4;
}
} else {
gst_buffer_replace (&nal,
gst_h264_parse_make_nal (h264parse,
GST_BUFFER_DATA (nal) + nal_length,
GST_BUFFER_SIZE (nal) - nal_length));
GstAdapter *adapter = gst_adapter_new ();
GstBuffer *sub;
while (offset + nal_length <= GST_BUFFER_SIZE (nal)) {
nalu_size = 0;
for (i = 0; i < nal_length; i++)
nalu_size = (nalu_size << 8) | GST_BUFFER_DATA (nal)[i];
if (nalu_size > GST_BUFFER_SIZE (nal) - nal_length - offset) {
GST_WARNING_OBJECT (h264parse, "NAL size %u is larger than buffer, "
"reducing it to the buffer size: %u", nalu_size,
GST_BUFFER_SIZE (nal) - nal_length - offset);
nalu_size = GST_BUFFER_SIZE (nal) - nal_length - offset;
}
sub = gst_h264_parse_make_nal (h264parse,
GST_BUFFER_DATA (nal) + nal_length + offset, nalu_size);
gst_adapter_push (adapter, sub);
offset += nalu_size + nal_length;
}
sub = gst_adapter_take_buffer (adapter, gst_adapter_available (adapter));
gst_buffer_copy_metadata (sub, nal, GST_BUFFER_COPY_ALL);
gst_buffer_unref (nal);
nal = sub;
g_object_unref (adapter);
}
}