| // Copyright (c) 2012 The WebM project authors. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the LICENSE file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| |
| #include "mkvmuxer/mkvmuxerutil.h" |
| |
| #ifdef __ANDROID__ |
| #include <fcntl.h> |
| #include <unistd.h> |
| #endif |
| |
| #include <cassert> |
| #include <cmath> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <cstring> |
| #include <ctime> |
| #include <new> |
| |
| #include "common/webmids.h" |
| #include "mkvmuxer/mkvmuxer.h" |
| #include "mkvmuxer/mkvwriter.h" |
| |
| namespace mkvmuxer { |
| |
| namespace { |
| |
| // Date elements are always 8 octets in size. |
| const int kDateElementSize = 8; |
| |
| uint64 WriteBlock(IMkvWriter* writer, const Frame* const frame, int64 timecode, |
| uint64 timecode_scale) { |
| uint64 block_additional_elem_size = 0; |
| uint64 block_addid_elem_size = 0; |
| uint64 block_more_payload_size = 0; |
| uint64 block_more_elem_size = 0; |
| uint64 block_additions_payload_size = 0; |
| uint64 block_additions_elem_size = 0; |
| if (frame->additional()) { |
| block_additional_elem_size = |
| EbmlElementSize(libwebm::kMkvBlockAdditional, frame->additional(), |
| frame->additional_length()); |
| block_addid_elem_size = EbmlElementSize( |
| libwebm::kMkvBlockAddID, static_cast<uint64>(frame->add_id())); |
| |
| block_more_payload_size = |
| block_addid_elem_size + block_additional_elem_size; |
| block_more_elem_size = |
| EbmlMasterElementSize(libwebm::kMkvBlockMore, block_more_payload_size) + |
| block_more_payload_size; |
| block_additions_payload_size = block_more_elem_size; |
| block_additions_elem_size = |
| EbmlMasterElementSize(libwebm::kMkvBlockAdditions, |
| block_additions_payload_size) + |
| block_additions_payload_size; |
| } |
| |
| uint64 discard_padding_elem_size = 0; |
| if (frame->discard_padding() != 0) { |
| discard_padding_elem_size = |
| EbmlElementSize(libwebm::kMkvDiscardPadding, |
| static_cast<int64>(frame->discard_padding())); |
| } |
| |
| const uint64 reference_block_timestamp = |
| frame->reference_block_timestamp() / timecode_scale; |
| uint64 reference_block_elem_size = 0; |
| if (!frame->is_key()) { |
| reference_block_elem_size = |
| EbmlElementSize(libwebm::kMkvReferenceBlock, reference_block_timestamp); |
| } |
| |
| const uint64 duration = frame->duration() / timecode_scale; |
| uint64 block_duration_elem_size = 0; |
| if (duration > 0) |
| block_duration_elem_size = |
| EbmlElementSize(libwebm::kMkvBlockDuration, duration); |
| |
| const uint64 block_payload_size = 4 + frame->length(); |
| const uint64 block_elem_size = |
| EbmlMasterElementSize(libwebm::kMkvBlock, block_payload_size) + |
| block_payload_size; |
| |
| const uint64 block_group_payload_size = |
| block_elem_size + block_additions_elem_size + block_duration_elem_size + |
| discard_padding_elem_size + reference_block_elem_size; |
| |
| if (!WriteEbmlMasterElement(writer, libwebm::kMkvBlockGroup, |
| block_group_payload_size)) { |
| return 0; |
| } |
| |
| if (!WriteEbmlMasterElement(writer, libwebm::kMkvBlock, block_payload_size)) |
| return 0; |
| |
| if (WriteUInt(writer, frame->track_number())) |
| return 0; |
| |
| if (SerializeInt(writer, timecode, 2)) |
| return 0; |
| |
| // For a Block, flags is always 0. |
| if (SerializeInt(writer, 0, 1)) |
| return 0; |
| |
| if (writer->Write(frame->frame(), static_cast<uint32>(frame->length()))) |
| return 0; |
| |
| if (frame->additional()) { |
| if (!WriteEbmlMasterElement(writer, libwebm::kMkvBlockAdditions, |
| block_additions_payload_size)) { |
| return 0; |
| } |
| |
| if (!WriteEbmlMasterElement(writer, libwebm::kMkvBlockMore, |
| block_more_payload_size)) |
| return 0; |
| |
| if (!WriteEbmlElement(writer, libwebm::kMkvBlockAddID, |
| static_cast<uint64>(frame->add_id()))) |
| return 0; |
| |
| if (!WriteEbmlElement(writer, libwebm::kMkvBlockAdditional, |
| frame->additional(), frame->additional_length())) { |
| return 0; |
| } |
| } |
| |
| if (frame->discard_padding() != 0 && |
| !WriteEbmlElement(writer, libwebm::kMkvDiscardPadding, |
| static_cast<int64>(frame->discard_padding()))) { |
| return false; |
| } |
| |
| if (!frame->is_key() && !WriteEbmlElement(writer, libwebm::kMkvReferenceBlock, |
| reference_block_timestamp)) { |
| return false; |
| } |
| |
| if (duration > 0 && |
| !WriteEbmlElement(writer, libwebm::kMkvBlockDuration, duration)) { |
| return false; |
| } |
| return EbmlMasterElementSize(libwebm::kMkvBlockGroup, |
| block_group_payload_size) + |
| block_group_payload_size; |
| } |
| |
| uint64 WriteSimpleBlock(IMkvWriter* writer, const Frame* const frame, |
| int64 timecode) { |
| if (WriteID(writer, libwebm::kMkvSimpleBlock)) |
| return 0; |
| |
| const int32 size = static_cast<int32>(frame->length()) + 4; |
| if (WriteUInt(writer, size)) |
| return 0; |
| |
| if (WriteUInt(writer, static_cast<uint64>(frame->track_number()))) |
| return 0; |
| |
| if (SerializeInt(writer, timecode, 2)) |
| return 0; |
| |
| uint64 flags = 0; |
| if (frame->is_key()) |
| flags |= 0x80; |
| |
| if (SerializeInt(writer, flags, 1)) |
| return 0; |
| |
| if (writer->Write(frame->frame(), static_cast<uint32>(frame->length()))) |
| return 0; |
| |
| return GetUIntSize(libwebm::kMkvSimpleBlock) + GetCodedUIntSize(size) + 4 + |
| frame->length(); |
| } |
| |
| } // namespace |
| |
| int32 GetCodedUIntSize(uint64 value) { |
| if (value < 0x000000000000007FULL) |
| return 1; |
| else if (value < 0x0000000000003FFFULL) |
| return 2; |
| else if (value < 0x00000000001FFFFFULL) |
| return 3; |
| else if (value < 0x000000000FFFFFFFULL) |
| return 4; |
| else if (value < 0x00000007FFFFFFFFULL) |
| return 5; |
| else if (value < 0x000003FFFFFFFFFFULL) |
| return 6; |
| else if (value < 0x0001FFFFFFFFFFFFULL) |
| return 7; |
| return 8; |
| } |
| |
| int32 GetUIntSize(uint64 value) { |
| if (value < 0x0000000000000100ULL) |
| return 1; |
| else if (value < 0x0000000000010000ULL) |
| return 2; |
| else if (value < 0x0000000001000000ULL) |
| return 3; |
| else if (value < 0x0000000100000000ULL) |
| return 4; |
| else if (value < 0x0000010000000000ULL) |
| return 5; |
| else if (value < 0x0001000000000000ULL) |
| return 6; |
| else if (value < 0x0100000000000000ULL) |
| return 7; |
| return 8; |
| } |
| |
| int32 GetIntSize(int64 value) { |
| // Doubling the requested value ensures positive values with their high bit |
| // set are written with 0-padding to avoid flipping the signedness. |
| const uint64 v = (value < 0) ? value ^ -1LL : value; |
| return GetUIntSize(2 * v); |
| } |
| |
| uint64 EbmlMasterElementSize(uint64 type, uint64 value) { |
| // Size of EBML ID |
| int32 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += GetCodedUIntSize(value); |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlElementSize(uint64 type, int64 value) { |
| // Size of EBML ID |
| int32 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += GetIntSize(value); |
| |
| // Size of Datasize |
| ebml_size++; |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlElementSize(uint64 type, uint64 value) { |
| return EbmlElementSize(type, value, 0); |
| } |
| |
| uint64 EbmlElementSize(uint64 type, uint64 value, uint64 fixed_size) { |
| // Size of EBML ID |
| uint64 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += (fixed_size > 0) ? fixed_size : GetUIntSize(value); |
| |
| // Size of Datasize |
| ebml_size++; |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlElementSize(uint64 type, float /* value */) { |
| // Size of EBML ID |
| uint64 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += sizeof(float); |
| |
| // Size of Datasize |
| ebml_size++; |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlElementSize(uint64 type, const char* value) { |
| if (!value) |
| return 0; |
| |
| // Size of EBML ID |
| uint64 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += strlen(value); |
| |
| // Size of Datasize |
| ebml_size += GetCodedUIntSize(strlen(value)); |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlElementSize(uint64 type, const uint8* value, uint64 size) { |
| if (!value) |
| return 0; |
| |
| // Size of EBML ID |
| uint64 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += size; |
| |
| // Size of Datasize |
| ebml_size += GetCodedUIntSize(size); |
| |
| return ebml_size; |
| } |
| |
| uint64 EbmlDateElementSize(uint64 type) { |
| // Size of EBML ID |
| uint64 ebml_size = GetUIntSize(type); |
| |
| // Datasize |
| ebml_size += kDateElementSize; |
| |
| // Size of Datasize |
| ebml_size++; |
| |
| return ebml_size; |
| } |
| |
| int32 SerializeInt(IMkvWriter* writer, int64 value, int32 size) { |
| if (!writer || size < 1 || size > 8) |
| return -1; |
| |
| for (int32 i = 1; i <= size; ++i) { |
| const int32 byte_count = size - i; |
| const int32 bit_count = byte_count * 8; |
| |
| const int64 bb = value >> bit_count; |
| const uint8 b = static_cast<uint8>(bb); |
| |
| const int32 status = writer->Write(&b, 1); |
| |
| if (status < 0) |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| int32 SerializeFloat(IMkvWriter* writer, float f) { |
| if (!writer) |
| return -1; |
| |
| assert(sizeof(uint32) == sizeof(float)); |
| // This union is merely used to avoid a reinterpret_cast from float& to |
| // uint32& which will result in violation of strict aliasing. |
| union U32 { |
| uint32 u32; |
| float f; |
| } value; |
| value.f = f; |
| |
| for (int32 i = 1; i <= 4; ++i) { |
| const int32 byte_count = 4 - i; |
| const int32 bit_count = byte_count * 8; |
| |
| const uint8 byte = static_cast<uint8>(value.u32 >> bit_count); |
| |
| const int32 status = writer->Write(&byte, 1); |
| |
| if (status < 0) |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| int32 WriteUInt(IMkvWriter* writer, uint64 value) { |
| if (!writer) |
| return -1; |
| |
| int32 size = GetCodedUIntSize(value); |
| |
| return WriteUIntSize(writer, value, size); |
| } |
| |
| int32 WriteUIntSize(IMkvWriter* writer, uint64 value, int32 size) { |
| if (!writer || size < 0 || size > 8) |
| return -1; |
| |
| if (size > 0) { |
| const uint64 bit = 1LL << (size * 7); |
| |
| if (value > (bit - 2)) |
| return -1; |
| |
| value |= bit; |
| } else { |
| size = 1; |
| int64 bit; |
| |
| for (;;) { |
| bit = 1LL << (size * 7); |
| const uint64 max = bit - 2; |
| |
| if (value <= max) |
| break; |
| |
| ++size; |
| } |
| |
| if (size > 8) |
| return false; |
| |
| value |= bit; |
| } |
| |
| return SerializeInt(writer, value, size); |
| } |
| |
| int32 WriteID(IMkvWriter* writer, uint64 type) { |
| if (!writer) |
| return -1; |
| |
| writer->ElementStartNotify(type, writer->Position()); |
| |
| const int32 size = GetUIntSize(type); |
| |
| return SerializeInt(writer, type, size); |
| } |
| |
| bool WriteEbmlMasterElement(IMkvWriter* writer, uint64 type, uint64 size) { |
| if (!writer) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| if (WriteUInt(writer, size)) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, uint64 value) { |
| return WriteEbmlElement(writer, type, value, 0); |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, uint64 value, |
| uint64 fixed_size) { |
| if (!writer) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| uint64 size = GetUIntSize(value); |
| if (fixed_size > 0) { |
| if (size > fixed_size) |
| return false; |
| size = fixed_size; |
| } |
| if (WriteUInt(writer, size)) |
| return false; |
| |
| if (SerializeInt(writer, value, static_cast<int32>(size))) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, int64 value) { |
| if (!writer) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return 0; |
| |
| const uint64 size = GetIntSize(value); |
| if (WriteUInt(writer, size)) |
| return false; |
| |
| if (SerializeInt(writer, value, static_cast<int32>(size))) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, float value) { |
| if (!writer) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| if (WriteUInt(writer, 4)) |
| return false; |
| |
| if (SerializeFloat(writer, value)) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, const char* value) { |
| if (!writer || !value) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| const uint64 length = strlen(value); |
| if (WriteUInt(writer, length)) |
| return false; |
| |
| if (writer->Write(value, static_cast<uint32>(length))) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlElement(IMkvWriter* writer, uint64 type, const uint8* value, |
| uint64 size) { |
| if (!writer || !value || size < 1) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| if (WriteUInt(writer, size)) |
| return false; |
| |
| if (writer->Write(value, static_cast<uint32>(size))) |
| return false; |
| |
| return true; |
| } |
| |
| bool WriteEbmlDateElement(IMkvWriter* writer, uint64 type, int64 value) { |
| if (!writer) |
| return false; |
| |
| if (WriteID(writer, type)) |
| return false; |
| |
| if (WriteUInt(writer, kDateElementSize)) |
| return false; |
| |
| if (SerializeInt(writer, value, kDateElementSize)) |
| return false; |
| |
| return true; |
| } |
| |
| uint64 WriteFrame(IMkvWriter* writer, const Frame* const frame, |
| Cluster* cluster) { |
| if (!writer || !frame || !frame->IsValid() || !cluster || |
| !cluster->timecode_scale()) |
| return 0; |
| |
| // Technically the timecode for a block can be less than the |
| // timecode for the cluster itself (remember that block timecode |
| // is a signed, 16-bit integer). However, as a simplification we |
| // only permit non-negative cluster-relative timecodes for blocks. |
| const int64 relative_timecode = cluster->GetRelativeTimecode( |
| frame->timestamp() / cluster->timecode_scale()); |
| if (relative_timecode < 0 || relative_timecode > kMaxBlockTimecode) |
| return 0; |
| |
| return frame->CanBeSimpleBlock() |
| ? WriteSimpleBlock(writer, frame, relative_timecode) |
| : WriteBlock(writer, frame, relative_timecode, |
| cluster->timecode_scale()); |
| } |
| |
| uint64 WriteVoidElement(IMkvWriter* writer, uint64 size) { |
| if (!writer) |
| return false; |
| |
| // Subtract one for the void ID and the coded size. |
| uint64 void_entry_size = size - 1 - GetCodedUIntSize(size - 1); |
| uint64 void_size = EbmlMasterElementSize(libwebm::kMkvVoid, void_entry_size) + |
| void_entry_size; |
| |
| if (void_size != size) |
| return 0; |
| |
| const int64 payload_position = writer->Position(); |
| if (payload_position < 0) |
| return 0; |
| |
| if (WriteID(writer, libwebm::kMkvVoid)) |
| return 0; |
| |
| if (WriteUInt(writer, void_entry_size)) |
| return 0; |
| |
| const uint8 value = 0; |
| for (int32 i = 0; i < static_cast<int32>(void_entry_size); ++i) { |
| if (writer->Write(&value, 1)) |
| return 0; |
| } |
| |
| const int64 stop_position = writer->Position(); |
| if (stop_position < 0 || |
| stop_position - payload_position != static_cast<int64>(void_size)) |
| return 0; |
| |
| return void_size; |
| } |
| |
| void GetVersion(int32* major, int32* minor, int32* build, int32* revision) { |
| *major = 0; |
| *minor = 3; |
| *build = 3; |
| *revision = 0; |
| } |
| |
| uint64 MakeUID(unsigned int* seed) { |
| uint64 uid = 0; |
| |
| for (int i = 0; i < 7; ++i) { // avoid problems with 8-byte values |
| uid <<= 8; |
| |
| // TODO(fgalligan): Move random number generation to platform specific code. |
| #ifdef _WIN32 |
| (void)seed; |
| const int32 nn = rand(); |
| #elif __ANDROID__ |
| (void)seed; |
| int32 temp_num = 1; |
| int fd = open("/dev/urandom", O_RDONLY); |
| if (fd != -1) { |
| read(fd, &temp_num, sizeof(temp_num)); |
| close(fd); |
| } |
| const int32 nn = temp_num; |
| #else |
| const int32 nn = rand_r(seed); |
| #endif |
| const int32 n = 0xFF & (nn >> 4); // throw away low-order bits |
| |
| uid |= n; |
| } |
| |
| return uid; |
| } |
| |
| bool IsMatrixCoefficientsValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kGbr: |
| case mkvmuxer::Colour::kBt709: |
| case mkvmuxer::Colour::kUnspecifiedMc: |
| case mkvmuxer::Colour::kReserved: |
| case mkvmuxer::Colour::kFcc: |
| case mkvmuxer::Colour::kBt470bg: |
| case mkvmuxer::Colour::kSmpte170MMc: |
| case mkvmuxer::Colour::kSmpte240MMc: |
| case mkvmuxer::Colour::kYcocg: |
| case mkvmuxer::Colour::kBt2020NonConstantLuminance: |
| case mkvmuxer::Colour::kBt2020ConstantLuminance: |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsChromaSitingHorzValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kUnspecifiedCsh: |
| case mkvmuxer::Colour::kLeftCollocated: |
| case mkvmuxer::Colour::kHalfCsh: |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsChromaSitingVertValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kUnspecifiedCsv: |
| case mkvmuxer::Colour::kTopCollocated: |
| case mkvmuxer::Colour::kHalfCsv: |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsColourRangeValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kUnspecifiedCr: |
| case mkvmuxer::Colour::kBroadcastRange: |
| case mkvmuxer::Colour::kFullRange: |
| case mkvmuxer::Colour::kMcTcDefined: |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsTransferCharacteristicsValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kIturBt709Tc: |
| case mkvmuxer::Colour::kUnspecifiedTc: |
| case mkvmuxer::Colour::kReservedTc: |
| case mkvmuxer::Colour::kGamma22Curve: |
| case mkvmuxer::Colour::kGamma28Curve: |
| case mkvmuxer::Colour::kSmpte170MTc: |
| case mkvmuxer::Colour::kSmpte240MTc: |
| case mkvmuxer::Colour::kLinear: |
| case mkvmuxer::Colour::kLog: |
| case mkvmuxer::Colour::kLogSqrt: |
| case mkvmuxer::Colour::kIec6196624: |
| case mkvmuxer::Colour::kIturBt1361ExtendedColourGamut: |
| case mkvmuxer::Colour::kIec6196621: |
| case mkvmuxer::Colour::kIturBt202010bit: |
| case mkvmuxer::Colour::kIturBt202012bit: |
| case mkvmuxer::Colour::kSmpteSt2084: |
| case mkvmuxer::Colour::kSmpteSt4281Tc: |
| case mkvmuxer::Colour::kAribStdB67Hlg: |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsPrimariesValueValid(uint64_t value) { |
| switch (value) { |
| case mkvmuxer::Colour::kReservedP0: |
| case mkvmuxer::Colour::kIturBt709P: |
| case mkvmuxer::Colour::kUnspecifiedP: |
| case mkvmuxer::Colour::kReservedP3: |
| case mkvmuxer::Colour::kIturBt470M: |
| case mkvmuxer::Colour::kIturBt470Bg: |
| case mkvmuxer::Colour::kSmpte170MP: |
| case mkvmuxer::Colour::kSmpte240MP: |
| case mkvmuxer::Colour::kFilm: |
| case mkvmuxer::Colour::kIturBt2020: |
| case mkvmuxer::Colour::kSmpteSt4281P: |
| case mkvmuxer::Colour::kJedecP22Phosphors: |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace mkvmuxer |