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dcaparse: preserve DTS HD substream

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This commit is contained in:
Matej Knopp 2017-06-24 18:47:14 +02:00 committed by Arun Raghavan
parent 301e8d558e
commit f7854411fa
1 changed files with 29 additions and 2 deletions
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31
gst/audioparsers/gstdcaparse.c
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@ -328,6 +328,7 @@ gst_dca_parse_handle_frame (GstBaseParse * parse,
gint off = -1;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_EOS;
gsize extra_size = 0;
gst_buffer_map (buf, &map, GST_MAP_READ);
@ -448,8 +449,34 @@ gst_dca_parse_handle_frame (GstBaseParse * parse,
cleanup:
gst_buffer_unmap (buf, &map);
if (ret == GST_FLOW_OK && size <= map.size) {
ret = gst_base_parse_finish_frame (parse, frame, size);
/* it is possible that DTS HD substream after DTS core */
if (parse->flags & GST_BASE_PARSE_FLAG_DRAINING || map.size >= size + 9) {
extra_size = 0;
if (map.size >= size + 9) {
const guint8 *next = map.data + size;
/* Check for DTS_SYNCWORD_SUBSTREAM */
if (next[0] == 0x64 && next[1] == 0x58 && next[2] == 0x20
&& next[3] == 0x25) {
/* 7.4.1 Extension Substream Header */
GstBitReader reader;
gst_bit_reader_init (&reader, next + 4, 5);
gst_bit_reader_skip (&reader, 8 + 2); /* skip UserDefinedBits and nExtSSIndex) */
if (gst_bit_reader_get_bits_uint8_unchecked (&reader, 1) == 0) {
gst_bit_reader_skip (&reader, 8);
extra_size =
gst_bit_reader_get_bits_uint32_unchecked (&reader, 16) + 1;
} else {
gst_bit_reader_skip (&reader, 12);
extra_size =
gst_bit_reader_get_bits_uint32_unchecked (&reader, 20) + 1;
}
}
}
if (ret == GST_FLOW_OK && size + extra_size <= map.size) {
ret = gst_base_parse_finish_frame (parse, frame, size + extra_size);
} else {
ret = GST_FLOW_OK;
}
} else {
ret = GST_FLOW_OK;
}