diff options
Diffstat (limited to 'components/cdm')
| -rw-r--r-- | components/cdm/browser/DEPS | 2 | ||||
| -rw-r--r-- | components/cdm/browser/widevine_drm_delegate_android.cc | 140 |
2 files changed, 4 insertions, 138 deletions
diff --git a/components/cdm/browser/DEPS b/components/cdm/browser/DEPS index d0fb59f..1891599 100644 --- a/components/cdm/browser/DEPS +++ b/components/cdm/browser/DEPS @@ -1,4 +1,4 @@ include_rules = [ "+content/public/browser", - "+media/base/android", + "+media/cdm", ] diff --git a/components/cdm/browser/widevine_drm_delegate_android.cc b/components/cdm/browser/widevine_drm_delegate_android.cc index 1c2b6e4..8acf800 100644 --- a/components/cdm/browser/widevine_drm_delegate_android.cc +++ b/components/cdm/browser/widevine_drm_delegate_android.cc @@ -4,151 +4,17 @@ #include "components/cdm/browser/widevine_drm_delegate_android.h" -#include "base/logging.h" -#include "base/numerics/safe_conversions.h" +#include "media/cdm/cenc_utils.h" namespace cdm { namespace { -uint32_t ReadUint32(const uint8_t* data) { - uint32_t value = 0; - for (int i = 0; i < 4; ++i) - value = (value << 8) | data[i]; - return value; -} - -uint64_t ReadUint64(const uint8_t* data) { - uint64_t value = 0; - for (int i = 0; i < 8; ++i) - value = (value << 8) | data[i]; - return value; -} - -// The structure of an ISO CENC Protection System Specific Header (PSSH) box is -// as follows. (See ISO/IEC FDIS 23001-7:2011(E).) -// Note: ISO boxes use big-endian values. -// -// PSSH { -// uint32 Size -// uint32 Type -// uint64 LargeSize # Field is only present if value(Size) == 1. -// uint8 Version -// uint24 Flags -// uint8[16] SystemId -// if (version > 0) { -// uint32 KID_count; -// uint8[16][KID_Count] KID; -// } -// uint32 DataSize -// uint8[DataSize] Data -// } -const int kBoxHeaderSize = 8; // Box's header contains Size and Type. -const int kBoxLargeSizeSize = 8; -const int kPsshVersionFlagSize = 4; -const uint32_t k24BitMask = 0x00ffffff; -const int kPsshSystemIdSize = 16; -const int kPsshKidCountSize = 4; -const int kPsshKidSize = 16; -const int kPsshDataSizeSize = 4; -const uint32_t kPsshType = 0x70737368; - const uint8_t kWidevineUuid[16] = { 0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE, 0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED }; -// Tries to find a PSSH box with the Widevine UUID, parses the -// "Data" of the box and put it in |pssh_data|. Returns true if such a box is -// found and successfully parsed. Returns false otherwise. -// Notes: -// 1, If multiple PSSH boxes are found,the "Data" of the first matching PSSH box -// will be set in |pssh_data|. -// 2, Only PSSH boxes are allowed in |data|. -bool GetPsshData(const std::vector<uint8_t>& data, - std::vector<uint8_t>* pssh_data) { - int bytes_left = base::checked_cast<int>(data.size()); - const uint8_t* cur = &data[0]; - const uint8_t* data_end = cur + bytes_left; - - while (bytes_left > 0) { - const uint8_t* box_head = cur; - - if (bytes_left < kBoxHeaderSize) - return false; - - uint64_t box_size = ReadUint32(cur); - uint32_t type = ReadUint32(cur + 4); - cur += kBoxHeaderSize; - bytes_left -= kBoxHeaderSize; - - if (box_size == 1) { // LargeSize is present. - if (bytes_left < kBoxLargeSizeSize) - return false; - - box_size = ReadUint64(cur); - cur += kBoxLargeSizeSize; - bytes_left -= kBoxLargeSizeSize; - } else if (box_size == 0) { - box_size = bytes_left + kBoxHeaderSize; - } - - const uint8_t* box_end = box_head + box_size; - if (data_end < box_end) - return false; - - if (type != kPsshType) - return false; - - const int kPsshBoxMinimumSize = - kPsshVersionFlagSize + kPsshSystemIdSize + kPsshDataSizeSize; - if (box_end < cur + kPsshBoxMinimumSize) - return false; - - uint8_t version = cur[0]; - uint32_t flags = ReadUint32(cur) & k24BitMask; - cur += kPsshVersionFlagSize; - bytes_left -= kPsshVersionFlagSize; - if (flags != 0) - return false; - - DCHECK_GE(bytes_left, kPsshSystemIdSize); - if (!std::equal(kWidevineUuid, - kWidevineUuid + sizeof(kWidevineUuid), cur)) { - cur = box_end; - bytes_left = data_end - cur; - continue; - } - - cur += kPsshSystemIdSize; - bytes_left -= kPsshSystemIdSize; - - // If KeyIDs specified, skip them. - if (version > 0) { - DCHECK_GE(bytes_left, kPsshKidCountSize); - uint32_t kid_count = ReadUint32(cur); - cur += kPsshKidCountSize + kid_count * kPsshKidSize; - bytes_left -= kPsshKidCountSize + kid_count * kPsshKidSize; - // Must be bytes left in this box for data_size. - if (box_end < cur + kPsshDataSizeSize) - return false; - } - - DCHECK_GE(bytes_left, kPsshDataSizeSize); - uint32_t data_size = ReadUint32(cur); - cur += kPsshDataSizeSize; - bytes_left -= kPsshDataSizeSize; - - if (box_end < cur + data_size) - return false; - - pssh_data->assign(cur, cur + data_size); - return true; - } - - return false; -} - -} +} // namespace WidevineDrmDelegateAndroid::WidevineDrmDelegateAndroid() { } @@ -171,7 +37,7 @@ bool WidevineDrmDelegateAndroid::OnCreateSession( // Widevine MediaDrm plugin only accepts the "data" part of the PSSH box as // the init data when using MP4 container. - return GetPsshData(init_data, init_data_out); + return media::GetPsshData(init_data, GetUUID(), init_data_out); } } // namespace cdm |