Index: media/formats/mp2t/ts_section_cets_pssh.cc |
diff --git a/media/formats/mp2t/ts_section_cets_pssh.cc b/media/formats/mp2t/ts_section_cets_pssh.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..18a45a9e0084d0eb2f5f9e9f2ef948b928a922bc |
--- /dev/null |
+++ b/media/formats/mp2t/ts_section_cets_pssh.cc |
@@ -0,0 +1,56 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "media/formats/mp2t/ts_section_cets_pssh.h" |
+ |
+#include "base/logging.h" |
+#include "media/base/bit_reader.h" |
+#include "media/formats/mp2t/mp2t_common.h" |
+ |
+namespace media { |
+namespace mp2t { |
+ |
+TsSectionCetsPssh::TsSectionCetsPssh( |
+ const RegisterPsshBoxesCb& register_pssh_boxes_cb) |
+ : register_pssh_boxes_cb_(register_pssh_boxes_cb) {} |
+ |
+TsSectionCetsPssh::~TsSectionCetsPssh() {} |
+ |
+bool TsSectionCetsPssh::Parse(bool payload_unit_start_indicator, |
+ const uint8_t* buf, |
+ int size) { |
+ DCHECK(buf); |
+ // Ignore if doesn't contain PUSI. |
+ if (!payload_unit_start_indicator) |
+ return false; |
+ // TODO(dougsteed). This initial implementation requires the entire CETS-PSSH |
+ // to fit in one TS packet, so we know that the box length will fit in one |
+ // byte. |
+ BitReader bit_reader(buf, size); |
+ bool md5_flag; |
+ RCHECK(bit_reader.ReadFlag(&md5_flag) && !md5_flag); |
+ RCHECK(bit_reader.SkipBits(31)); |
+ int box_length_bits = bit_reader.bits_available(); |
+ std::string pssh; |
+ RCHECK(bit_reader.ReadString(box_length_bits, &pssh)); |
+ // Now check that the first 4 bytes are of the form {0x00, 0x00, 0x00, X}, |
+ // where X is the box length in bytes. |
+ RCHECK(pssh[0] == 0x00 && pssh[1] == 0x00 && pssh[2] == 0x00); |
+ uint8_t declared_box_bytes = static_cast<uint8_t>(pssh[3]); |
+ RCHECK(declared_box_bytes <= box_length_bits * 8); |
+ pssh.resize(declared_box_bytes); |
+ register_pssh_boxes_cb_.Run(std::vector<uint8_t>(pssh.begin(), pssh.end())); |
+ return true; |
+} |
+ |
+void TsSectionCetsPssh::Flush() { |
+ // No pending state. |
+} |
+ |
+void TsSectionCetsPssh::Reset() { |
+ // No state to clean up. |
+} |
+ |
+} // namespace mp2t |
+} // namespace media |