134     WriteAt(1, data()[1] | 0x80);  in SetMarker()
136     WriteAt(1, data()[1] & 0x7F);  in SetMarker()
143   WriteAt(1, (data()[1] & 0x80) | payload_type);  in SetPayloadType()
148   ByteWriter<uint16_t>::WriteBigEndian(WriteAt(2), seq_no);  in SetSequenceNumber()
153   ByteWriter<uint32_t>::WriteBigEndian(WriteAt(4), timestamp);  in SetTimestamp()
158   ByteWriter<uint32_t>::WriteBigEndian(WriteAt(8), ssrc);  in SetSsrc()
173               WriteAt(extension.offset +  in ZeroMutableExtensions()
185         memset(WriteAt(extension.offset), 0, extension.length);  in ZeroMutableExtensions()
215   WriteAt(0, (data()[0] & 0xF0) | rtc::dchecked_cast<uint8_t>(csrcs.size()));  in SetCsrcs()
218     ByteWriter<uint32_t>::WriteBigEndian(WriteAt(offset), csrc);  in SetCsrcs()
233       return rtc::MakeArrayView(WriteAt(extension_entry->offset), length);  in AllocateRawExtension()
305     WriteAt(0, data()[0] | 0x10);  // Set extension bit.  in AllocateRawExtension()
306     ByteWriter<uint16_t>::WriteBigEndian(WriteAt(extensions_offset - 4),  in AllocateRawExtension()
313     WriteAt(extensions_offset + extensions_size_, one_byte_header);  in AllocateRawExtension()
317     WriteAt(extensions_offset + extensions_size_, extension_id);  in AllocateRawExtension()
319     WriteAt(extensions_offset + extensions_size_ + 1, extension_length);  in AllocateRawExtension()
334   return rtc::MakeArrayView(WriteAt(extension_info_offset),  in AllocateRawExtension()
357     memmove(WriteAt(write_index), data() + read_index, extension_entry->length);  in PromoteToTwoByteHeaderExtension()
359     WriteAt(--write_index, extension_entry->length);  in PromoteToTwoByteHeaderExtension()
360     WriteAt(--write_index, extension_entry->id);  in PromoteToTwoByteHeaderExtension()
365   ByteWriter<uint16_t>::WriteBigEndian(WriteAt(extensions_offset - 4),  in PromoteToTwoByteHeaderExtension()
379   ByteWriter<uint16_t>::WriteBigEndian(WriteAt(extensions_offset - 2),  in SetExtensionLengthMaybeAddZeroPadding()
383   memset(WriteAt(extensions_offset + extensions_size_), 0,  in SetExtensionLengthMaybeAddZeroPadding()
403   return WriteAt(payload_offset_);  in SetPayloadSize()
419     memset(WriteAt(padding_offset), 0, padding_size_ - 1);  in SetPadding()
420     WriteAt(padding_end - 1, padding_size_);  in SetPadding()
421     WriteAt(0, data()[0] | 0x20);  // Set padding bit.  in SetPadding()
423     WriteAt(0, data()[0] & ~0x20);  // Clear padding bit.  in SetPadding()
440   memset(WriteAt(0), 0, kFixedHeaderSize);  in Clear()
442   WriteAt(0, kRtpVersion << 6);  in Clear()